/* ============================================
   R24 Studio Portfolio — Design System
   Dark Futuristic Theme with Cyan-Purple Accent
   ============================================ */

/* CSS Custom Properties */
:root {
    --bg-primary: #06060b;
    --bg-secondary: #0c0c14;
    --bg-tertiary: #12121e;
    --bg-card: rgba(15, 15, 25, 0.7);
    --bg-glass: rgba(15, 15, 30, 0.5);

    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b5;
    --text-tertiary: #6a6a80;

    --accent-cyan: #00d4ff;
    --accent-purple: #7c3aed;
    --accent-pink: #ec4899;
    --gradient-primary: linear-gradient(135deg, #00d4ff, #7c3aed);
    --gradient-secondary: linear-gradient(135deg, #7c3aed, #ec4899);
    --gradient-glow: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(124, 58, 237, 0.15));

    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 212, 255, 0.2);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.1);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Overrides */
[data-theme="light"] {
    --bg-primary: #F0FFFF;
    --bg-secondary: #e4f6f6;
    --bg-tertiary: #d8eded;
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-glass: rgba(255, 255, 255, 0.5);

    --text-primary: #0c1a2a;
    --text-secondary: #3a4d63;
    --text-tertiary: #6b7f96;

    --accent-cyan: #0098b5;
    --accent-purple: #6829c4;

    --border-color: rgba(0, 0, 0, 0.08);
    --border-glow: rgba(0, 152, 181, 0.25);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(0, 152, 181, 0.1);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(240, 255, 255, 0.85);
}

[data-theme="light"] .gradient-text {
    background: linear-gradient(135deg, #0098b5, #6829c4);
    -webkit-background-clip: text;
    background-clip: text;
}

[data-theme="light"] .modal-backdrop {
    background: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .section-tag {
    background: rgba(0, 152, 181, 0.1);
    border-color: rgba(0, 152, 181, 0.2);
}

/* Icon visibility */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Smooth global transition for theme switch */
body.theme-transitioning,
body.theme-transitioning *,
body.theme-transitioning *::before,
body.theme-transitioning *::after {
    transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease !important;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-cyan);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-purple);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section Common */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-glow);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-cyan);
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-xl);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35);
}

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

.btn-outline:hover {
    background: var(--gradient-glow);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.85rem;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-xl);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-sm:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
}

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

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(6, 6, 11, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
}

.logo-mesh {
    color: var(--text-primary);
}

.logo-lab {
    color: var(--accent-cyan);
}

.logo-dot {
    color: var(--accent-purple);
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

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

/* Dropdown Base */
.nav-item-dropdown {
    position: relative;
    display: flex;
    align-items: center;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
}

.dropdown-icon {
    transition: transform var(--transition-fast);
}

.nav-item-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(20px);
    z-index: 100;
}

.nav-item-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

/* Nav Right & Settings Dropdown */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.settings-dropdown {
    position: relative;
}

.settings-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.settings-toggle:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.settings-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    min-width: 200px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(20px);
    z-index: 100;
}

.settings-dropdown:hover .settings-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-action {
    display: flex;
    align-items: center;
    width: 100%;
    background: none;
    border: none;
    padding: 10px 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
    gap: 12px;
}

.dropdown-action:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.theme-icons-wrap, .lang-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
}

.lang-code {
    color: var(--accent-purple);
    font-family: var(--font-heading);
}

[data-theme="dark"] .theme-icons-wrap .icon-moon { display: none; }
[data-theme="light"] .theme-icons-wrap .icon-sun { display: none; }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: absolute;
    transition: all var(--transition-fast);
}

.hamburger::before { top: -7px; }
.hamburger::after { bottom: -7px; }

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    width: 100%;
    max-width: 1200px;
}

.hero-text {
    text-align: left;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glow);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    animation: fadeInDown 0.8s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.title-line {
    display: block;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 0 40px 0;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 32px;
    margin-top: 64px;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.stat {
    text-align: left;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-plus {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.hero-3d-canvas {
    width: 100%;
    height: 100%;
    min-height: 500px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-3d-canvas canvas {
    width: 100% !important;
    height: 100% !important;
    outline: none;
}

.hero-scroll {
    position: absolute;
    bottom: 28px;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: fit-content;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 1;
    animation: fadeInUp 1s ease-out 1s both;
}

.hero-scroll span {
    font-size: 0.65rem;
    color: var(--text-tertiary);
    letter-spacing: 3px;
    text-transform: uppercase;
    font-weight: 500;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--border-glow), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-glow {
    width: 100%;
    height: 12px;
    background: var(--accent-cyan);
    border-radius: 1px;
    position: absolute;
    top: -12px;
    box-shadow: 0 0 8px var(--accent-cyan), 0 0 16px rgba(0, 212, 255, 0.3);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0% { top: -12px; opacity: 0; }
    30% { opacity: 1; }
    100% { top: 40px; opacity: 0; }
}

.scroll-chevron {
    color: var(--accent-cyan);
    opacity: 0.5;
    animation: chevron-bob 2s ease-in-out infinite;
}

@keyframes chevron-bob {
    0%, 100% { transform: translateY(0); opacity: 0.3; }
    50% { transform: translateY(4px); opacity: 0.7; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
    align-items: center;
}

.about-lead {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-lead strong {
    color: var(--accent-cyan);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 32px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    border-color: var(--border-glow);
    transform: translateX(8px);
}

.highlight-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border-radius: var(--radius-sm);
    color: var(--accent-cyan);
    flex-shrink: 0;
}

.highlight-item h4 {
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.highlight-item p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 0;
}

/* About Visual / Card Stack */
.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-card-stack {
    position: relative;
    width: 280px;
    height: 340px;
}

.about-card {
    position: absolute;
    width: 200px;
    padding: 28px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-smooth);
    cursor: default;
}

.about-card:hover {
    transform: translateY(-8px) rotate(0deg) !important;
    border-color: var(--accent-cyan);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    font-size: 2.5rem;
}

.about-card span {
    font-weight: 600;
    font-size: 0.9rem;
}

.card-1 { top: 0; left: 0; transform: rotate(-6deg); z-index: 4; }
.card-2 { top: 30px; left: 70px; transform: rotate(3deg); z-index: 3; }
.card-3 { top: 80px; left: 20px; transform: rotate(-2deg); z-index: 2; }
.card-4 { top: 130px; left: 60px; transform: rotate(5deg); z-index: 1; }

/* ============================================
   SERVICES
   ============================================ */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 36px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

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

.service-card.featured {
    border-color: var(--border-glow);
    background: var(--gradient-glow);
}

.featured-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.service-icon-wrap {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    color: var(--accent-cyan);
    margin-bottom: 20px;
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-tags span {
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 100px;
    font-size: 0.78rem;
    color: var(--accent-cyan);
    font-weight: 500;
}

.service-platforms {
    display: flex;
    gap: 16px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.platform {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.platform svg {
    color: var(--accent-purple);
}

/* ============================================
   PORTFOLIO
   ============================================ */
.portfolio-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--border-glow);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.portfolio-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-smooth);
}

.portfolio-item.hidden {
    display: none;
}

.portfolio-img-wrap {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.portfolio-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.portfolio-item:hover .portfolio-img-wrap img {
    transform: scale(1.08);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 20%, rgba(0, 0, 0, 0.85) 100%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.overlay-content {
    transform: translateY(10px);
    transition: transform var(--transition-base);
}

.portfolio-item:hover .overlay-content {
    transform: translateY(0);
}

.overlay-category {
    display: inline-block;
    padding: 4px 10px;
    background: var(--gradient-primary);
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.overlay-content h3 {
    font-size: 1.15rem;
    margin-bottom: 6px;
    color: #fff;
}

.overlay-content p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
    line-height: 1.5;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-base);
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-cyan);
}

/* Modal Slider */
.modal-slider {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.slider-track {
    display: flex;
    height: 100%;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider-track img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    flex-shrink: 0;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(6, 6, 14, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-glow);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    z-index: 5;
    transition: all var(--transition-fast);
    opacity: 0;
}

.modal-slider:hover .slider-btn {
    opacity: 1;
}

.slider-btn:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--accent-cyan);
    transform: translateY(-50%) scale(1.1);
}

.slider-prev { left: 12px; }
.slider-next { right: 12px; }

.slider-dots {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 5;
}

.slider-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
}

.slider-dot.active {
    background: var(--accent-cyan);
    box-shadow: 0 0 8px var(--accent-cyan);
    width: 24px;
    border-radius: 4px;
}

.modal-info {
    padding: 32px;
}

.modal-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-glow);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 12px;
}

.modal-info h2 {
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.modal-info p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.modal-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.detail-item {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.detail-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.detail-value {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
}

/* ============================================
   TECH STACK
   ============================================ */
.tech {
    background: var(--bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.tech-item {
    perspective: 1000px;
    background: transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    min-height: 190px;
}

.tech-item-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

.tech-item:hover .tech-item-inner {
    transform: rotateY(180deg);
}

.tech-item-front, .tech-item-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: var(--radius-lg);
}

.tech-item-front {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 32px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.tech-item:hover .tech-item-front {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.tech-item-back {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--accent-cyan);
    transform: rotateY(180deg);
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.tech-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glow);
    border-radius: var(--radius-md);
    color: var(--accent-cyan);
}

.tech-item-front > span {
    font-weight: 600;
    font-size: 0.9rem;
}

[data-theme="light"] .tech-item-back {
    background: rgba(240, 255, 255, 0.94);
    color: var(--text-secondary);
}

/* ============================================
   BEFORE & AFTER SLIDER
   ============================================ */
.ba-wrapper {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.ba-slider-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: grab;
    border: 1px solid var(--border-glow);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.06), 0 8px 32px rgba(0, 0, 0, 0.3);
    user-select: none;
}

.ba-slider-container:active {
    cursor: grabbing;
}

.ba-slider-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
}

.ba-img-before {
    z-index: 2;
    clip-path: inset(0 50% 0 0);
}

.ba-img-after {
    z-index: 1;
}

/* Divider handle */
.ba-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    z-index: 3;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.ba-handle-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

.ba-handle-knob {
    position: relative;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
    backdrop-filter: blur(8px);
}

.ba-handle-knob svg {
    color: var(--accent-cyan);
}

/* Labels */
.ba-label {
    position: absolute;
    bottom: 12px;
    z-index: 4;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #fff;
}

.ba-label-before {
    left: 12px;
}

.ba-label-after {
    right: 12px;
}

/* Navigation */
.ba-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    gap: 16px;
}

.ba-nav-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.ba-nav-btn:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.ba-dots {
    display: flex;
    gap: 10px;
}

.ba-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--text-tertiary);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    padding: 0;
}

.ba-dot.active {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

.ba-title {
    margin-top: 12px;
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* ============================================
   3D SHOWCASE
   ============================================ */
.showcase3d {
    background: var(--bg-secondary);
}

.viewer-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.viewer-container {
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-glow);
    background: var(--bg-card);
    position: relative;
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.06), 0 8px 32px rgba(0, 0, 0, 0.3);
}

.viewer-container model-viewer {
    --poster-color: transparent;
}

/* Loading state */
.viewer-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: var(--bg-card);
}

.viewer-loading span {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.loading-spinner {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Control hints */
.viewer-controls {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 20px;
}

.control-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.control-hint svg {
    color: var(--accent-cyan);
    opacity: 0.5;
}

/* ============================================
   CONTACT — Minimalist
   ============================================ */
.contact-minimal {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

/* Contact Form */
.contact-form {
    width: 100%;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Contact Links — inline */
.contact-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.contact-link-item {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

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

.contact-link-item svg {
    color: var(--accent-cyan);
    opacity: 0.6;
    flex-shrink: 0;
}

.contact-link-item:hover svg {
    opacity: 1;
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.social-link:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.15);
}


/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 48px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 24px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

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

.footer-links a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 4px;
        transition: right var(--transition-base);
    }

    .nav-menu.active {
        right: 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 20px;
    }

    .hero-text {
        align-items: center;
        text-align: center;
        order: 1; /* Move text above the 3D canvas on mobile */
    }

    .hero-3d-canvas {
        min-height: 350px;
        order: 2; /* Move 3D canvas below text on mobile */
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
        gap: 20px;
        flex-wrap: wrap;
    }

    .stat {
        text-align: center;
    }

    .nav-toggle {
        display: block;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual {
        order: -1;
    }

    .about-card-stack {
        width: 240px;
        height: 280px;
    }

    .about-card {
        width: 170px;
        padding: 20px;
    }

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

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

    .modal-details {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .section {
        padding: 72px 0;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .portfolio-filters {
        gap: 6px;
    }

    .filter-btn {
        padding: 6px 14px;
        font-size: 0.8rem;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .tech-item {
        padding: 20px 12px;
    }
}

/* ============================================
   ADMIN PAGE
   ============================================ */
.admin-container {
    max-width: 800px;
    margin: 120px auto 60px;
    padding: 0 24px;
}

.pin-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    animation: fadeInUp 0.5s ease-out;
}

.pin-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(20px);
}

.pin-box h2 {
    margin-bottom: 24px;
}

.admin-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
    text-align: left;
}

.pin-box input {
    text-align: center;
    letter-spacing: 4px;
    font-size: 1.2rem;
}

.admin-dashboard {
    display: none;
    animation: fadeInUp 0.5s ease-out;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.admin-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(20px);
}

.admin-card h3 {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.admin-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.admin-form label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.admin-form input,
.admin-form select,
.admin-form textarea {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.admin-form input:focus,
.admin-form select:focus,
.admin-form textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.1);
}

.admin-form textarea {
    resize: vertical;
    min-height: 100px;
}

.form-actions {
    margin-top: 32px;
    display: flex;
    justify-content: flex-end;
    gap: 16px;
}

@media (max-width: 768px) {
    .admin-form .form-row {
        grid-template-columns: 1fr;
    }
}

/* Admin Table Styles */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.admin-table th {
    text-align: left;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.admin-table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.admin-table tbody tr {
    transition: background var(--transition-fast);
}

.admin-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.admin-table-thumb {
    width: 60px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.admin-actions {
    display: flex;
    gap: 8px;
}

.admin-btn-icon {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.admin-btn-icon:hover {
    background: var(--gradient-glow);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.admin-btn-icon.delete:hover {
    border-color: #ef4444;
    color: #ef4444;
}