/* ==========================================================================
   Alya Interactive - Ultra-Performant Minimalist Monochrome Design System
   ========================================================================== */

:root {
    /* Color Palette - Pure Monochrome */
    --bg-dark: #050505;
    --bg-surface: rgba(18, 18, 20, 0.75);
    --bg-surface-hover: rgba(28, 28, 32, 0.9);
    --bg-card: rgba(15, 15, 17, 0.85);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-highlight: rgba(255, 255, 255, 0.28);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #646470;
    
    /* Monochrome Accents */
    --accent-white: #ffffff;
    --accent-silver: #d4d4d8;
    --accent-gray: #3f3f46;
    
    --gradient-brand: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
    --gradient-text: linear-gradient(135deg, #ffffff 0%, #d4d4d8 60%, #858590 100%);
    
    /* Shadows & Glows */
    --glow-white: 0 0 25px rgba(255, 255, 255, 0.12);
    --shadow-card: 0 15px 35px -10px rgba(0, 0, 0, 0.8);
    
    /* Layout & Spacing */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Hardware Acceleration Helpers */
.gpu-accel {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* Background Ambient Orbs (Hardware-Accelerated & Performance Optimized) */
.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
    transform: translateZ(0);
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(50px);
    opacity: 0.12;
    will-change: transform;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    animation: floatOrb 22s infinite alternate ease-in-out;
}

.orb-1 {
    width: 450px;
    height: 450px;
    background: #ffffff;
    top: -120px;
    left: -80px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: #a1a1aa;
    bottom: -120px;
    right: -80px;
    animation-delay: -8s;
}

.orb-3 {
    width: 320px;
    height: 320px;
    background: #ffffff;
    top: 45%;
    left: 35%;
    opacity: 0.06;
    animation-delay: -15s;
}

@keyframes floatOrb {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(40px, 45px, 0) scale(1.05); }
    100% { transform: translate3d(-25px, -30px, 0) scale(0.95); }
}

/* Typography Helpers */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Navbar */
.navbar-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 18px 0;
    transform: translateZ(0);
}

.navbar-header.scrolled {
    background: rgba(5, 5, 5, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.brand-logo-img {
    height: 34px;
    width: auto;
    object-fit: contain;
    border-radius: 6px;
    filter: invert(1) brightness(1.2);
    mix-blend-mode: screen;
}

.logo-text .highlight {
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    background: rgba(255, 255, 255, 0.03);
    padding: 8px 24px;
    border-radius: 40px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #ffffff;
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Language Dropdown Selector */
.lang-dropdown {
    position: relative;
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    min-height: 38px;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
}

.lang-chevron {
    font-size: 0.7rem;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: #0d0d10;
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-md);
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 150px;
    max-height: 280px;
    overflow-y: auto;
    box-shadow: var(--shadow-card), var(--glow-white);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: var(--transition);
    z-index: 1100;
}

.lang-dropdown.active .lang-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.lang-dropdown.active .lang-chevron {
    transform: rotate(180deg);
}

.lang-option {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    text-align: left;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.lang-option:hover, .lang-option.active {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.btn-github-nav {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    min-height: 38px;
}

.btn-github-nav:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.mobile-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

/* High-Contrast Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #ffffff;
    color: #000000;
    padding: 13px 26px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.12);
    transition: var(--transition);
    transform: translateZ(0);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: #e4e4e7;
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.22);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    padding: 13px 26px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: var(--transition);
    transform: translateZ(0);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Sections Base */
section {
    padding: 120px 24px 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(2rem, 4.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 14px;
    line-height: 1.2;
}

.section-description {
    color: var(--text-secondary);
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
}

/* Hero Section */
.hero-section {
    min-height: 82vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 150px;
}

.hero-content {
    max-width: 850px;
    width: 100%;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.14);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    color: #e4e4e7;
    margin-bottom: 22px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #ffffff;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.9);
    animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
    0% {
        transform: scale(0.9);
        opacity: 0.35;
        box-shadow: 0 0 4px rgba(255, 255, 255, 0.3);
    }
    50% {
        transform: scale(1.35);
        opacity: 1;
        box-shadow: 0 0 14px rgba(255, 255, 255, 1);
    }
    100% {
        transform: scale(0.9);
        opacity: 0.35;
        box-shadow: 0 0 4px rgba(255, 255, 255, 0.3);
    }
}

.hero-title {
    font-size: clamp(2.2rem, 5.5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.18;
    letter-spacing: -0.03em;
    margin-bottom: 22px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 36px;
    font-weight: 400;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 36px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 20px 36px;
    border-radius: var(--radius-xl);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    width: fit-content;
    margin: 0 auto;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border-color);
}

/* App Showcase Grid */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
    margin-bottom: 36px;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    transform: translateZ(0);
}

.app-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-card), var(--glow-white);
}

.app-card-image {
    position: relative;
    width: 100%;
    height: 270px;
    background: #000000;
    overflow: hidden;
}

.app-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.4s ease;
}

.app-card:hover .app-card-image img {
    transform: scale(1.03);
}

.app-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(0, 0, 0, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 5px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.app-badge.accent-green {
    background: rgba(0, 0, 0, 0.82);
    border-color: rgba(255, 255, 255, 0.3);
}

.app-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.app-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.app-title-flex {
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-mini-icon {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.app-version {
    font-size: 0.78rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    padding: 3px 9px;
    border-radius: 12px;
    color: var(--text-secondary);
}

.app-tagline {
    color: var(--accent-silver);
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.app-summary {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 18px;
    flex: 1;
}

.app-features-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.app-features-chips span {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.app-card-actions {
    margin-top: auto;
}

.btn-card-details {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
}

.btn-card-details:hover {
    background: #ffffff;
    border-color: #ffffff;
    color: #000000;
}

.view-all-apps-wrapper {
    display: flex;
    justify-content: center;
    margin: 20px 0 45px;
}

.btn-all-apps {
    gap: 12px;
}

/* Directory Page Controls */
.directory-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 260px;
}

.search-box i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.95rem;
}

.search-box input {
    width: 100%;
    background: rgba(18, 18, 20, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    padding: 12px 18px 12px 46px;
    color: var(--text-primary);
    font-size: 0.92rem;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: #ffffff;
    box-shadow: var(--glow-white);
}

.filter-pills {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-pill {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 18px;
    border-radius: 30px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-height: 38px;
}

.filter-pill:hover, .filter-pill.active {
    background: #ffffff;
    color: #000000;
    border-color: #ffffff;
}

.back-home-bottom {
    display: flex;
    justify-content: center;
    margin-top: 50px;
}

/* Future Lab Banner */
.future-lab-banner {
    display: flex;
    align-items: center;
    gap: 20px;
    background: rgba(18, 18, 20, 0.8);
    border: 1px dashed rgba(255, 255, 255, 0.25);
    padding: 24px 30px;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.lab-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
}

.lab-text {
    flex: 1;
}

.lab-text h3 {
    font-size: 1.15rem;
    margin-bottom: 4px;
}

.lab-text p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.lab-badge {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: #ffffff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

/* Philosophy Section Grid */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.pillar-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 28px 22px;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
}

.pillar-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.28);
    background: var(--bg-surface-hover);
}

.pillar-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.2rem;
    margin-bottom: 18px;
    border: 1px solid var(--border-color);
}

.pillar-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.pillar-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Contact Section */
.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.contact-info h2 {
    font-size: clamp(1.7rem, 4vw, 2.2rem);
    font-weight: 800;
    margin-top: 8px;
    margin-bottom: 14px;
    line-height: 1.25;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 0.95rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
}

.contact-item i {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    border: 1px solid var(--border-color);
}

.contact-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.contact-item span {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--text-secondary);
    text-decoration: underline;
}

/* Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input, .form-group textarea {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.92rem;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: #ffffff;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.15);
}

.form-status {
    font-size: 0.85rem;
    text-align: center;
    margin-top: 6px;
}

.form-status.success {
    color: #ffffff;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 50px 24px 28px;
    background: #020202;
}

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

.footer-brand {
    margin-bottom: 20px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 8px;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 20px;
    margin-bottom: 36px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.82rem;
}

.back-to-top {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.back-to-top:hover {
    background: #ffffff;
    color: #000000;
}

/* Modal Popup */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    padding: 16px;
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: #0d0d10;
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    max-width: 620px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 32px;
    position: relative;
    box-shadow: var(--shadow-card), var(--glow-white);
    transform: scale(0.92);
    transition: transform 0.25s ease;
}

.modal-backdrop.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: #ffffff;
    color: #000000;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.modal-img {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.modal-tag {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 700;
    text-transform: uppercase;
}

.modal-header h2 {
    font-size: 1.6rem;
    font-weight: 800;
}

.modal-sub {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.modal-body-text h4 {
    font-size: 1.05rem;
    margin-bottom: 12px;
}

.modal-body-text ul {
    list-style: none;
    margin-bottom: 24px;
}

.modal-body-text li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.modal-body-text li i {
    color: #ffffff;
    margin-top: 3px;
}

.modal-store-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-store {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 11px 18px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    transition: var(--transition);
    min-height: 42px;
}

.btn-store.active-store {
    background: #ffffff;
    color: #000000;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.btn-store.active-store:hover {
    background: #e4e4e7;
    transform: translateY(-2px);
}

.btn-store.disabled {
    opacity: 0.55;
    cursor: pointer;
}

/* Privacy Policy Page Styles */
.policy-section {
    padding-top: 130px;
    padding-bottom: 80px;
}

.policy-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 50px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-card);
}

.policy-header {
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
    margin-bottom: 36px;
}

.policy-header h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 800;
    margin-top: 6px;
    margin-bottom: 8px;
}

.policy-meta {
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 500;
}

.policy-content {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.75;
}

.policy-content h2 {
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 36px;
    margin-bottom: 16px;
    border-left: 3px solid #ffffff;
    padding-left: 12px;
}

.policy-content h3 {
    color: #e4e4e7;
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 12px;
}

.policy-content p {
    margin-bottom: 16px;
}

.policy-content ul {
    margin-bottom: 20px;
    padding-left: 24px;
}

.policy-content li {
    margin-bottom: 8px;
}

.policy-back-cta {
    display: flex;
    justify-content: center;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.footer-policy-link a {
    color: var(--text-secondary);
    text-decoration: underline;
    font-size: 0.85rem;
}

.footer-policy-link a:hover {
    color: #ffffff;
}

/* ==========================================================================
   Comprehensive Mobile Responsiveness (Phones & Tablets)
   ========================================================================== */

@media (max-width: 900px) {
    section {
        padding: 90px 20px 40px;
    }

    .contact-card {
        grid-template-columns: 1fr;
        padding: 28px 20px;
        gap: 32px;
    }
    
    .future-lab-banner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    /* Performance: Disable heavy blur filters on mobile GPUs */
    .orb {
        filter: blur(30px);
        opacity: 0.08;
    }

    .nav-container {
        padding: 0 16px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(8, 8, 10, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        border-radius: 0;
        border-bottom: 1px solid var(--border-color);
        display: none;
        gap: 20px;
    }
    
    .nav-menu.active {
        display: flex;
    }

    .mobile-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .btn-github-nav span {
        display: none;
    }
    
    .hero-section {
        min-height: 75vh;
        padding-top: 130px;
    }

    .hero-cta-group {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

    .hero-cta-group .btn-primary,
    .hero-cta-group .btn-secondary {
        width: 100%;
        max-width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
        width: 100%;
        padding: 18px 20px;
    }
    
    .stat-divider {
        width: 80%;
        height: 1px;
    }

    .apps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .app-card-image {
        height: 230px;
    }

    .directory-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .search-box {
        width: 100%;
        min-width: 0;
    }

    .filter-pills {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 6px;
        -webkit-overflow-scrolling: touch;
    }

    .filter-pill {
        white-space: nowrap;
    }

    .modal-content {
        padding: 24px 18px;
        border-radius: 20px;
    }

    .modal-header {
        flex-direction: column;
        text-align: center;
    }

    .modal-store-buttons {
        flex-direction: column;
    }

    .btn-store {
        width: 100%;
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .brand-logo .logo-text {
        font-size: 1.05rem;
    }

    .brand-logo-img {
        height: 28px;
    }

    .lang-btn {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .contact-info h2 {
        font-size: 1.5rem;
    }
}