/* ========================================
   ASSISTIVE FUTURES - SIGN LANGUAGE AI PAGE STYLES
   ======================================== */

/* ========================================
   BASE STYLES & VARIABLES
   ======================================== */

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

:root {
    /* Color Palette */
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-background-dark: #0a0a0a;
    --color-background-darker: #000000;
    --color-background-light: #111111;
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.9);
    --color-text-muted: rgba(255, 255, 255, 0.7);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;
    
    /* Transitions */
    --transition-base: 0.3s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-pill: 50px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 30px rgba(102, 126, 234, 0.4);
    --shadow-xl: 0 20px 60px rgba(102, 126, 234, 0.3);
}

html {
    scroll-behavior: smooth;
}

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

/* ========================================
   NAVIGATION (Shared)
   ======================================== */

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    position: relative;
    transition: var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    padding: 0.5rem 0;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    transition: var(--transition-base);
    position: relative;
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

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

/* ========================================
   PAGE HEADER
   ======================================== */

.page-header {
    position: relative;
    padding: 10rem 2rem 6rem;
    text-align: center;
    overflow: hidden;
    margin-top: 70px;
}

.header-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    opacity: 0.15;
}

.header-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(102, 126, 234, 0.2), transparent 70%);
}

.header-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.page-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: var(--font-weight-black);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-light);
    max-width: 800px;
    margin: 0 auto;
}

/* ========================================
   SECTIONS
   ======================================== */

.section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
}

.section:nth-child(even) {
    background: var(--color-background-light);
}

.section:nth-child(odd) {
    background: var(--color-background-dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-weight-black);
    text-align: center;
}

/* ========================================
   INTRODUCTION SECTION
   ======================================== */

.intro-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.intro-lead {
    font-size: clamp(1.3rem, 2.2vw, 1.6rem);
    line-height: 1.7;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    font-weight: var(--font-weight-semibold);
}

.intro-description {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* ========================================
   COMPONENT CARDS
   ======================================== */

.component-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.component-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    opacity: 0;
    transition: var(--transition-smooth);
}

.component-card:hover,
.component-card:focus-within {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.component-card:hover::before,
.component-card:focus-within::before {
    opacity: 1;
}

.component-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.component-number {
    font-size: 3.5rem;
    font-weight: var(--font-weight-black);
    color: rgba(102, 126, 234, 0.15);
    line-height: 1;
}

.component-icon {
    font-size: 4rem;
}

.component-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-bold);
}

.component-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    font-weight: var(--font-weight-light);
    margin-bottom: var(--spacing-lg);
}

.component-description > p {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   FEATURE GRID
   ======================================== */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.feature-item {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary);
    transition: var(--transition-base);
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
}

.feature-item h4 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.feature-item p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ========================================
   HIGHLIGHT BOX
   ======================================== */

.highlight-box {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.highlight-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.highlight-content h4 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.highlight-content p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* ========================================
   HEALTHCARE DOMAINS
   ======================================== */

.healthcare-domains {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.domain-card {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: var(--transition-smooth);
}

.domain-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.domain-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.domain-card h4 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.domain-card p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.clinical-integration {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.clinical-integration h4 {
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.clinical-integration p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   TRANSLATION MODES
   ======================================== */

.translation-modes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.mode-card {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.mode-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.mode-direction {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.mode-from,
.mode-to {
    font-size: 2.5rem;
}

.mode-arrow {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.mode-card h4 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.mode-card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ========================================
   TECHNICAL ARCHITECTURE
   ======================================== */

.technical-architecture {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.technical-architecture h4 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
}

.tech-features {
    display: grid;
    gap: var(--spacing-sm);
}

.tech-feature {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    border-left: 2px solid var(--color-primary);
}

.tech-feature strong {
    display: block;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.tech-feature p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ========================================
   EDUCATION FEATURES
   ======================================== */

.education-features {
    display: grid;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.edu-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.edu-feature:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(5px);
}

.edu-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.edu-feature h4 {
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.edu-feature p {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.curriculum-alignment {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.curriculum-alignment h4 {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.curriculum-alignment p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   CO-DESIGN SECTION
   ======================================== */

.codesign-section {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
}

.codesign-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.codesign-card {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-smooth);
}

.codesign-card:hover,
.codesign-card:focus-within {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.codesign-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.codesign-card h3 {
    font-size: 1.4rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
}

.codesign-card p {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.community-statement {
    max-width: 800px;
    margin: var(--spacing-2xl) auto 0;
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.community-statement p {
    font-size: 1.2rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    font-weight: var(--font-weight-semibold);
    font-style: italic;
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section {
    text-align: center;
    background: var(--color-background-dark);
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-weight-black);
}

.cta-description {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-secondary);
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-primary);
    border-radius: var(--radius-pill);
    font-weight: var(--font-weight-semibold);
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-lg);
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.cta-button:hover,
.cta-button:focus {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
}

.cta-button-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.cta-button-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--color-primary);
}

.cta-button-secondary:hover,
.cta-button-secondary:focus {
    background: rgba(255, 255, 255, 0.15);
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
    background: var(--color-background-darker);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-heading {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.footer-description,
.footer-text {
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-text-muted);
    transition: var(--transition-base);
    display: inline-block;
    text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--color-primary);
    transform: translateX(5px);
}

.footer-cta {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: rgba(102, 126, 234, 0.2);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-pill);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    transition: var(--transition-base);
    text-decoration: none;
}

.footer-cta:hover,
.footer-cta:focus {
    background: rgba(102, 126, 234, 0.3);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition-smooth);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .page-header {
        padding: 8rem 1.5rem 4rem;
    }
    
    .section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    .component-card {
        padding: var(--spacing-lg);
    }
    
    .component-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .component-number {
        font-size: 2.5rem;
    }
    
    .feature-grid,
    .healthcare-domains,
    .translation-modes,
    .codesign-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }
    
    .header-icon {
        font-size: 3.5rem;
    }
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

@media (prefers-contrast: high) {
    .component-card,
    .domain-card,
    .mode-card,
    .codesign-card {
        border: 2px solid var(--color-primary);
    }
}