/* ==========================================================================
   AI Services Website - Main Stylesheet
   Design System: Dark theme inspired by Stripe/Vercel/Linear
   ========================================================================== */

/* ==========================================================================
   0. Font Face
   ========================================================================== */

@font-face {
    font-family: 'Aeternus';
    src: url('/public/fonts/aeternus.woff2') format('woff2');
    font-weight: 100 900;
    font-display: swap;
}

/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
    /* Colores */
    --color-bg: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-card: #111111;
    --color-bg-card-hover: #1a1a1a;
    --color-text: #ffffff;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-accent: #fbbf3c;
    --color-accent-hover: #d9a232;
    --color-accent-glow: rgba(251, 191, 60, 0.15);
    --color-border: #27272a;

    /* Tipografía */
    --font-family: 'Aeternus', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-hero: clamp(2.5rem, 5vw, 4.5rem);

    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-section: clamp(4rem, 8vw, 8rem);

    /* Bordes y sombras */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --shadow-card: 0 0 0 1px var(--color-border);
    --shadow-glow: 0 0 20px var(--color-accent-glow);

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 64px;
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-accent);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

ul,
ol {
    list-style: none;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   3. Layout & Containers
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

main {
    padding-top: var(--nav-height);
}

.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section + .section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: var(--max-width);
    height: 1px;
    background: linear-gradient(90deg, transparent, #FFEB3B, #76FF03, #2979FF, #651FFF, #FF4081, #FF9100, transparent);
}

.section-title {
    font-size: var(--font-size-4xl);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--spacing-3xl);
}

/* ==========================================================================
   4. Navigation (Fixed + Glassmorphism)
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--color-text);
    transition: opacity var(--transition-base);
    flex-shrink: 0;
}

.nav-logo:hover {
    opacity: 0.8;
    color: var(--color-text);
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.nav-logo-text {
    white-space: nowrap;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Hamburger toggle (mobile) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Nav menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: color var(--transition-base), background var(--transition-base);
}

.nav-link:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link--active {
    color: var(--color-text);
}

.nav-lang-item {
    margin-left: var(--spacing-sm);
    padding-left: var(--spacing-md);
    border-left: 1px solid var(--color-border);
}

/* ==========================================================================
   5. Language Selector
   ========================================================================== */

.lang-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.lang-selector-link {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: color var(--transition-base), background var(--transition-base);
}

.lang-selector-link:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.05);
}

.lang-selector-link--active {
    color: var(--color-accent);
    background: var(--color-accent-glow);
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */

.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--nav-height));
    padding: var(--spacing-section) 0;
    text-align: center;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.hero--with-bg {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero--with-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    pointer-events: none;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.5;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(to bottom right, var(--color-text) 30%, var(--color-text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: inline-block;
}

/* ==========================================================================
   7. Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.75rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: #000000;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: #000000;
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

/* ==========================================================================
   8. Cards & Service Cards
   ========================================================================== */

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.card,
.service-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-card);
    transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card:hover,
.service-card:hover {
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    transform: translateY(-2px);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent);
}

.service-card-icon-text {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 900;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
    font-family: 'Courier New', Courier, monospace;
    text-shadow: 0 0 20px var(--color-accent-glow);
    line-height: 1;
    min-height: 48px;
}

.service-card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.service-card-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   8a. Services Section (Tech Pro Look)
   ========================================================================== */

.services-section {
    position: relative;
    overflow: hidden;
}

.services-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(251, 191, 60, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(251, 191, 60, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    pointer-events: none;
}

.section-title--gradient {
    background: linear-gradient(90deg, #FFEB3B, #76FF03, #2979FF, #651FFF, #FF4081, #FF9100);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   8c. Service Banners (Home Page)
   ========================================================================== */

.service-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: calc(100vh - var(--nav-height));
    padding: var(--spacing-section) var(--spacing-xl);
    background-color: var(--color-bg);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
    gap: var(--spacing-3xl);
}

.banner-slider {
    position: relative;
    min-height: calc(100vh - var(--nav-height));
    overflow: hidden;
    background: var(--color-bg);
}

.banner-slide--active {
    opacity: 1;
    visibility: visible;
}

.service-banner-image {
    flex: 0 0 45%;
    max-width: 45%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease 0.2s, transform 0.6s ease 0.2s;
}

.service-banner-image img {
    width: 100%;
    height: auto;
    max-height: 70vh;
    object-fit: contain;
    border-radius: var(--radius-xl);
}

.banner-slide .service-banner-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease 0.3s, transform 0.6s ease 0.3s;
}

.banner-slide--active .service-banner-image {
    opacity: 1;
    transform: translateX(0);
}

.banner-slide--active .service-banner-content {
    opacity: 1;
    transform: translateY(0);
}

.banner-indicators {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 10;
}

.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-base);
    padding: 0;
}

.banner-dot:hover {
    background: rgba(255, 255, 255, 0.6);
}

.banner-dot--active {
    background: var(--color-accent);
    transform: scale(1.3);
}

.service-banner-content {
    flex: 0 0 45%;
    max-width: 45%;
    text-align: left;
    position: relative;
    z-index: 2;
}

.service-banner-icon {
    display: inline-block;
    font-size: var(--font-size-5xl);
    font-weight: 900;
    font-family: 'Courier New', Courier, monospace;
    margin-bottom: var(--spacing-lg);
    line-height: 1;
}

.service-banner-title {
    font-size: var(--font-size-hero);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
}

.service-banner-text {
    font-size: var(--font-size-xl);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
    max-width: 520px;
}

.service-banner-btn {
    font-weight: 600;
    border: 2px solid;
    padding: 0.75rem 2rem;
}

.service-banner-btn:hover {
    transform: translateY(-1px);
}

/* Banner color themes */
.service-banner--web .service-banner-icon,
.service-banner--web .service-banner-title {
    color: #2979FF;
}
.service-banner--web .service-banner-text {
    color: rgba(41, 121, 255, 0.7);
}
.service-banner--web .service-banner-btn {
    color: #2979FF;
    border-color: #2979FF;
    background: transparent;
}
.service-banner--web .service-banner-btn:hover {
    background: rgba(41, 121, 255, 0.1);
    color: #2979FF;
}

.service-banner--dev .service-banner-icon,
.service-banner--dev .service-banner-title {
    color: #76FF03;
}
.service-banner--dev .service-banner-text {
    color: rgba(118, 255, 3, 0.7);
}
.service-banner--dev .service-banner-btn {
    color: #76FF03;
    border-color: #76FF03;
    background: transparent;
}
.service-banner--dev .service-banner-btn:hover {
    background: rgba(118, 255, 3, 0.1);
    color: #76FF03;
}

.service-banner--ai .service-banner-icon,
.service-banner--ai .service-banner-title {
    color: #FF9100;
}
.service-banner--ai .service-banner-text {
    color: rgba(255, 145, 0, 0.7);
}
.service-banner--ai .service-banner-btn {
    color: #FF9100;
    border-color: #FF9100;
    background: transparent;
}
.service-banner--ai .service-banner-btn:hover {
    background: rgba(255, 145, 0, 0.1);
    color: #FF9100;
}

@media (max-width: 767px) {
    .service-banner {
        flex-direction: column;
        justify-content: center;
        min-height: 70vh;
        padding: var(--spacing-2xl) var(--spacing-md);
        gap: var(--spacing-xl);
    }

    .service-banner-image {
        flex: 0 0 auto;
        max-width: 100%;
        order: 1;
    }

    .service-banner-content {
        flex: 0 0 auto;
        max-width: 100%;
        order: 2;
    }

    .service-banner-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    .service-banner-icon {
        font-size: var(--font-size-3xl);
    }
}

/* ==========================================================================
   8b. Services Hero (Services Page)
   ========================================================================== */

.services-hero {
    position: relative;
    padding: calc(var(--spacing-section) * 1.2) 0 var(--spacing-3xl);
    text-align: center;
    overflow: hidden;
}

.services-hero-gradient {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1000px;
    height: 400px;
    background: radial-gradient(ellipse at center, rgba(251, 191, 60, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.services-hero .container {
    position: relative;
    z-index: 1;
}

.services-hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background: var(--color-accent-glow);
    border: 1px solid rgba(251, 191, 60, 0.3);
    border-radius: 100px;
    margin-bottom: var(--spacing-lg);
}

.services-hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.services-hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ==========================================================================
   8c. Service Detail Pro (Services Page)
   ========================================================================== */

.service-detail-pro {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.service-detail-pro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--service-color), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-detail-pro:hover::before {
    opacity: 1;
}

.service-detail-pro:hover {
    border-color: var(--service-color);
    box-shadow: var(--shadow-card), 0 0 30px rgba(var(--service-color-rgb), 0.15);
}

.service-detail-pro--blue {
    --service-color: #2979FF;
    --service-color-rgb: 41, 121, 255;
}

.service-detail-pro--green {
    --service-color: #76FF03;
    --service-color-rgb: 118, 255, 3;
}

.service-detail-pro--orange {
    --service-color: #FF9100;
    --service-color-rgb: 255, 145, 0;
}

.service-detail-pro-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.service-detail-pro-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--service-color-rgb), 0.1);
    border: 1px solid rgba(var(--service-color-rgb), 0.3);
    border-radius: var(--radius-lg);
    color: var(--service-color);
}

.service-detail-pro-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.service-detail-pro-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.service-detail-pro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.service-detail-pro-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.service-detail-pro-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--service-color);
}

.service-detail-pro-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.service-detail-pro-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.service-detail-pro-list li::before {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    margin-top: 0.5em;
    background: var(--service-color);
    border-radius: 50%;
}

.service-detail-pro-features {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.service-detail-pro-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-base), background var(--transition-base);
}

.service-detail-pro-feature:hover {
    border-color: var(--service-color);
    background: rgba(var(--service-color-rgb), 0.03);
}

.service-detail-pro-feature-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--service-color);
    margin-top: 2px;
}

.service-detail-pro-feature p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.service-detail-pro-footer {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

/* AI Capabilities Grid */
.ai-capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.ai-capability-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, rgba(var(--service-color-rgb), 0.03) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.ai-capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--service-color);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.ai-capability-card:hover {
    border-color: var(--service-color);
    background: linear-gradient(135deg, rgba(var(--service-color-rgb), 0.05) 0%, rgba(var(--service-color-rgb), 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.ai-capability-card:hover::before {
    opacity: 1;
}

.ai-capability-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--service-color-rgb), 0.15);
    border: 1px solid rgba(var(--service-color-rgb), 0.3);
    border-radius: var(--radius-md);
    color: var(--service-color);
    transition: all var(--transition-base);
}

.ai-capability-card:hover .ai-capability-icon {
    background: rgba(var(--service-color-rgb), 0.25);
    transform: scale(1.05);
}

.ai-capability-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
    padding-top: 0.5rem;
}

.ai-capability-card:hover .ai-capability-text {
    color: var(--color-text);
}

/* ==========================================================================
   8d. Tech Section Pro (Services Page)
   ========================================================================== */

.tech-section {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.tech-section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.tech-section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.tech-section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

.tech-grid-pro {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.tech-grid-pro--4 {
    grid-template-columns: repeat(4, 1fr);
}

.tech-item-pro {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.tech-item-pro:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.tech-item-pro-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
}

.tech-item-pro-logo img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.tech-item-pro-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.tech-item-pro-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.5;
    margin: 0;
}

/* Legacy service detail styles */
.service-detail {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    box-shadow: var(--shadow-card);
}

.service-detail-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.service-detail-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    color: var(--color-accent);
}

.service-detail-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
}

.service-detail-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
    max-width: 720px;
}

.service-detail-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.service-detail-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.service-detail-cta {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* Sub-services grid (AI Integration) */
.sub-services-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.sub-service-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-base);
}

.sub-service-item:hover {
    border-color: var(--color-accent);
}

.sub-service-dot {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    margin-top: 0.5em;
    background: var(--color-accent);
    border-radius: 50%;
}

.sub-service-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Tech description (Services page extended tech items) */
.tech-description {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: center;
    line-height: 1.5;
    margin-top: var(--spacing-xs);
}

/* ==========================================================================
   9. CTA Section
   ========================================================================== */

.cta-section {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.cta-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-flex;
}

/* ==========================================================================
   10. Tech Grid (Cloud Providers & AI Models)
   ========================================================================== */

.tech-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: background var(--transition-base), transform var(--transition-base);
}

.tech-item:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-2px);
}

.tech-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.tech-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-align: center;
}

/* ==========================================================================
   11. Forms (Contact Page)
   ========================================================================== */

.form-group {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.01em;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 1rem var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
    border-color: var(--color-text-muted);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-bg-card);
    box-shadow: 0 0 0 4px var(--color-accent-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
    transform: translateY(-1px);
}

.form-textarea {
    min-height: 160px;
    resize: vertical;
    line-height: 1.6;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='%23fbbf3c' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 6l3.5 4 3.5-4z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 20px;
    padding-right: 3rem;
    cursor: pointer;
}

.form-select option {
    background: var(--color-bg-card);
    color: var(--color-text);
    padding: var(--spacing-md);
}

.form-error {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: #ef4444;
    margin-top: var(--spacing-sm);
    font-weight: 500;
}

.form-error::before {
    content: '⚠';
    font-size: var(--font-size-sm);
}

.form-success {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, rgba(251, 191, 60, 0.15) 0%, rgba(251, 191, 60, 0.05) 100%);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    color: var(--color-accent);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-2xl);
    box-shadow: 0 4px 12px var(--color-accent-glow);
}

.form-success::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-accent);
    color: #000000;
    border-radius: 50%;
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.form-submit {
    width: 100%;
    margin-top: var(--spacing-xl);
}

.form-submit-btn {
    width: 100%;
    padding: 1.125rem var(--spacing-2xl);
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.form-submit-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.form-submit-btn:hover::before {
    width: 300px;
    height: 300px;
}

.form-submit-btn:active {
    transform: translateY(0);
}

/* ==========================================================================
   12. Contact Page
   ========================================================================== */

.contact-hero {
    padding: calc(var(--spacing-section) * 0.8) 0 var(--spacing-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.4;
}

.contact-hero .container {
    position: relative;
    z-index: 1;
}

.contact-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background: var(--color-accent-glow);
    border: 1px solid rgba(251, 191, 60, 0.3);
    border-radius: 100px;
    margin-bottom: var(--spacing-xl);
}

.contact-hero-badge svg {
    width: 18px;
    height: 18px;
}

.contact-hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.contact-hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-form-column {
    width: 100%;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.contact-form-column::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.contact-info-column {
    padding: var(--spacing-3xl);
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-secondary) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: calc(var(--nav-height) + var(--spacing-xl));
}

.contact-info-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.contact-info-item:hover {
    border-color: var(--color-accent);
    background: rgba(251, 191, 60, 0.05);
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.contact-info-icon {
    flex-shrink: 0;
    color: var(--color-accent);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-info-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    word-break: break-word;
}

.contact-info-link:hover {
    color: var(--color-accent);
}

.contact-info-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.form-error-banner {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(239, 68, 68, 0.05) 100%);
    border: 2px solid rgba(239, 68, 68, 0.5);
    border-radius: var(--radius-lg);
    color: #ef4444;
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-2xl);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.form-error-banner::before {
    content: '✕';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: #ef4444;
    color: #ffffff;
    border-radius: 50%;
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.form-privacy-notice {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-left: 3px solid var(--color-accent);
    border-radius: var(--radius-md);
    line-height: 1.6;
}

.form-privacy-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    border-bottom: 1px solid transparent;
}

.form-privacy-link:hover {
    color: var(--color-accent-hover);
    border-bottom-color: var(--color-accent-hover);
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .contact-form-column,
    .contact-info-column {
        padding: var(--spacing-xl);
    }

    .contact-info-column {
        position: static;
    }

    .contact-hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    .contact-hero-description {
        font-size: var(--font-size-base);
    }
}

/* ==========================================================================
   13. About Section
   ========================================================================== */

.about-section {
    padding: var(--spacing-section) 0;
}

.about-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    margin-bottom: var(--spacing-lg);
}

.about-logo {
    display: block;
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-2xl);
    border-radius: var(--radius-xl);
}

.about-intro {
    margin-top: var(--spacing-2xl);
}

.about-intro-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 680px;
    margin: 0 auto;
}

.about-specialization-intro {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.about-areas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.about-area-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.about-area-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 30px var(--color-accent-glow);
}

.about-area-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.about-area-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.about-mission-vision {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    max-width: 960px;
    margin: 0 auto;
}

.about-mission,
.about-vision {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: left;
}

.about-mission .section-subtitle,
.about-vision .section-subtitle {
    text-align: left;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-2xl);
}

.about-mission p,
.about-vision p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.about-values-list {
    display: grid;
    gap: var(--spacing-md);
    max-width: 720px;
    margin: var(--spacing-2xl) auto 0;
}

.about-value-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
    transition: border-color var(--transition-base), background var(--transition-base);
}

.about-value-item:hover {
    border-color: var(--color-accent);
    background: rgba(251, 191, 60, 0.05);
}

.about-value-item::before {
    content: '✓';
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: #000000;
    border-radius: 50%;
    font-weight: 700;
    font-size: var(--font-size-sm);
}

@media (max-width: 767px) {
    .about-areas {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .about-mission-vision {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .about-area-card {
        padding: var(--spacing-xl);
    }
}

/* ==========================================================================
   13. Privacy / Policy Section
   ========================================================================== */

.privacy-section {
    padding: var(--spacing-section) 0;
}

.privacy-content {
    max-width: 720px;
    margin: 0 auto;
}

.privacy-content h2 {
    font-size: var(--font-size-2xl);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.privacy-content h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-sm);
}

.privacy-content p {
    margin-bottom: var(--spacing-md);
}

.privacy-content ul {
    list-style: disc;
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.privacy-content li {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

/* ==========================================================================
   14. Feature & Benefit Lists
   ========================================================================== */

.feature-list,
.benefit-list {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-list li,
.benefit-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.feature-list li::before,
.benefit-list li::before {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    margin-top: 0.5em;
    background: var(--color-accent);
    border-radius: 50%;
}

/* ==========================================================================
   15. Footer
   ========================================================================== */

.site-footer {
    background: var(--color-accent);
    border-top: none;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #000000;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.footer-contact-list,
.footer-nav-list,
.footer-social-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-link {
    font-size: var(--font-size-base);
    color: rgba(0, 0, 0, 0.75);
    transition: color var(--transition-base);
}

.footer-link:hover {
    color: #000000;
}

.footer-address {
    font-size: var(--font-size-base);
    color: rgba(0, 0, 0, 0.75);
    font-style: normal;
    line-height: 1.6;
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(0, 0, 0, 0.15);
}

.footer-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.footer-logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.footer-rights {
    font-size: var(--font-size-xs);
    color: rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   16. Animations (IntersectionObserver)
   ========================================================================== */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll--visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   17. Utility Classes
   ========================================================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.text-muted  { color: var(--color-text-muted); }

/* ==========================================================================
   18. Media Queries - Responsive Design (320px → 2560px)
   ========================================================================== */

/* ---- Small phones (320px - 479px) ---- */
@media (max-width: 479px) {
    :root {
        --nav-height: 56px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .nav-logo-text {
        font-size: var(--font-size-sm);
    }

    .service-detail {
        padding: var(--spacing-xl);
    }

    .service-detail-columns {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .service-detail-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .service-detail-title {
        font-size: var(--font-size-2xl);
    }

    /* Services Hero */
    .services-hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    .services-hero-subtitle {
        font-size: var(--font-size-base);
    }

    /* Service Detail Pro */
    .service-detail-pro {
        padding: var(--spacing-xl);
    }

    .service-detail-pro-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .service-detail-pro-title {
        font-size: var(--font-size-2xl);
    }

    .service-detail-pro-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .service-detail-pro-card {
        padding: var(--spacing-lg);
    }

    /* Tech Grid Pro */
    .tech-grid-pro,
    .tech-grid-pro--4 {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .tech-section-title {
        font-size: var(--font-size-2xl);
    }

    /* AI Capabilities */
    .ai-capabilities-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .ai-capability-card {
        padding: var(--spacing-lg);
    }
}

/* ---- Phones & small tablets (480px - 767px) ---- */
@media (max-width: 767px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-xl) var(--spacing-xl);
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-left: 1px solid var(--color-border);
        transform: translateX(100%);
        transition: transform var(--transition-slow);
        gap: var(--spacing-xs);
    }

    .nav-menu--open {
        transform: translateX(0);
    }

    .nav-link {
        font-size: var(--font-size-base);
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .nav-lang-item {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        padding-top: var(--spacing-md);
        margin-top: var(--spacing-sm);
        border-top: 1px solid var(--color-border);
        width: 100%;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .service-detail {
        padding: var(--spacing-xl);
    }

    .service-detail-columns {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    /* Service Detail Pro */
    .service-detail-pro {
        padding: var(--spacing-xl);
    }

    .service-detail-pro-grid {
        grid-template-columns: 1fr;
    }

    /* Tech Grid Pro */
    .tech-grid-pro,
    .tech-grid-pro--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ---- Tablets (768px - 1023px) ---- */
@media (min-width: 768px) and (max-width: 1023px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Tech Grid Pro */
    .tech-grid-pro {
        grid-template-columns: repeat(3, 1fr);
    }

    .tech-grid-pro--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ---- Desktop (1024px+) ---- */
@media (min-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .tech-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ---- Large screens (1440px+) ---- */
@media (min-width: 1440px) {
    :root {
        --max-width: 1320px;
    }
}

/* ---- Ultra-wide (2560px+) ---- */
@media (min-width: 2560px) {
    :root {
        --max-width: 1600px;
        --font-size-base: 1.125rem;
    }

    .hero-title {
        font-size: 5rem;
    }
}

/* ---- Reduced motion preference ---- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .animate-on-scroll {
        opacity: 1;
        transform: none;
    }
}