/* ========================================
   ArtNet Portfolio - Design System
   ======================================== */

/* CSS Variables - Design Tokens */
:root {
    /* Primary - Deep Navy */
    --primary-900: #0a1628;
    --primary-800: #0f2744;
    --primary-700: #1a3a5c;
    --primary-600: #264d73;
    --primary-500: #335e8a;

    /* Accent - Electric Blue */
    --accent-500: #00d4ff;
    --accent-400: #33ddff;
    --accent-300: #66e5ff;
    --accent-200: #99eeff;

    /* Secondary - Purple */
    --secondary-600: #6d28d9;
    --secondary-500: #7c3aed;
    --secondary-400: #8b5cf6;
    --secondary-300: #a78bfa;

    /* Success / Error */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-500), var(--secondary-500));
    --gradient-primary-hover: linear-gradient(135deg, var(--accent-400), var(--secondary-400));
    --gradient-dark: linear-gradient(180deg, var(--primary-900) 0%, var(--primary-800) 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
    --gradient-hero: radial-gradient(ellipse at 50% 0%, var(--primary-700) 0%, var(--primary-900) 70%);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes - Fluid */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
    --text-3xl: clamp(1.875rem, 1.4rem + 2.4vw, 2.5rem);
    --text-4xl: clamp(2.25rem, 1.5rem + 3.75vw, 3.5rem);
    --text-5xl: clamp(3rem, 2rem + 5vw, 4.5rem);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-lg: 0 0 40px rgba(0, 212, 255, 0.4);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-tooltip: 400;

    /* Container */
    --container-max: 1280px;
    --container-padding: clamp(1rem, 5vw, 2rem);
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-200);
    background: var(--primary-900);
    min-height: 100vh;
    overflow-x: hidden;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ========================================
   Loading Screen
   ======================================== */

.loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--primary-900);
    z-index: 9999;
}

.loading-logo {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--space-xl);
}

.loading-logo .logo-art {
    color: var(--white);
}

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

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--primary-700);
    border-top-color: var(--accent-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--white);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--space-md);
}

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

.text-accent {
    color: var(--accent-500);
}

.text-muted {
    color: var(--gray-400);
}

/* ========================================
   Layout
   ======================================== */

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

.section {
    padding: clamp(3rem, 6vw, 8rem) 0;
    position: relative;
}

.section-alt {
    background: var(--gradient-dark);
}

/* ========================================
   Buttons
   ======================================== */

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    background: var(--gradient-primary-hover);
    box-shadow: var(--shadow-glow-lg);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--gray-600);
}

.btn-secondary:hover {
    border-color: var(--accent-500);
    color: var(--accent-500);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-300);
    padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
    color: var(--accent-500);
}

.btn-sm {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--text-lg);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 22, 40, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    font-weight: 500;
    color: var(--gray-300);
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all var(--transition-base);
}

.mobile-menu-btn.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.open span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: flex-start;
        padding-top: var(--space-2xl);
        background: var(--primary-900);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

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

    .mobile-menu-btn {
        display: flex;
    }
}

/* ========================================
   Language Selector
   ======================================== */

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.language-btn:hover {
    border-color: var(--accent-500);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--primary-800);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.language-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.language-option:hover {
    background: rgba(255, 255, 255, 0.05);
}

.language-option.active {
    color: var(--accent-500);
}

.flag {
    font-size: 1.25rem;
}

/* ========================================
   Logo
   ======================================== */

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

.logo-img {
    height: 60px;
    width: auto;
    display: block;
}

.footer .logo-img {
    height: 120px;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--gray-300);
    margin-bottom: var(--space-xl);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--gray-300);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

/* Geometric Shapes */
.hero-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-lg);
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 200px;
    height: 200px;
    top: 20%;
    right: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 100px;
    height: 100px;
    top: 60%;
    right: 25%;
    animation-delay: -5s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    top: 70%;
    right: 5%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(5deg); }
    50% { transform: translateY(0) rotate(0deg); }
    75% { transform: translateY(20px) rotate(-5deg); }
}

/* ========================================
   Section Title
   ======================================== */

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-500);
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-description {
    color: var(--gray-400);
    font-size: var(--text-lg);
}

/* ========================================
   Stats Section
   ======================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-card {
    text-align: center;
    padding: var(--space-xl);
}

.stat-value {
    font-size: var(--text-4xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.stat-label {
    color: var(--gray-400);
    font-size: var(--text-sm);
}

/* ========================================
   Services Section
   ======================================== */

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

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

@media (max-width: 640px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

.service-card {
    position: relative;
    padding: var(--space-2xl);
    background: var(--gradient-card);
    border: 1px solid var(--gray-800);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: transparent;
}

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

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.service-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent-500);
}

.service-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-md);
}

.service-description {
    color: var(--gray-400);
    font-size: var(--text-sm);
    line-height: 1.7;
}

/* ========================================
   Portfolio Section
   ======================================== */

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-full);
    color: var(--gray-400);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    grid-auto-flow: dense;
}

@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

.portfolio-item {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    cursor: pointer;
    border: 1px solid var(--gray-800);
    transition: all var(--transition-base);
}

.portfolio-item:hover {
    border-color: var(--accent-500);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.15);
}

.portfolio-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 22, 40, 0.95) 0%, rgba(10, 22, 40, 0.6) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-xl);
    opacity: 1;
    transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-image {
    transform: scale(1.05);
}

.portfolio-category {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-500);
    margin-bottom: var(--space-sm);
}

.portfolio-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.portfolio-tag {
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    color: var(--gray-300);
}

.portfolio-view-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
    color: var(--accent-500);
    font-size: var(--text-sm);
    font-weight: 500;
}

.portfolio-image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-700), var(--secondary-600));
    font-size: var(--text-lg);
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding: var(--space-xl);
    letter-spacing: 0.02em;
}

.portfolio-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    z-index: 2;
    letter-spacing: 0.03em;
}

.portfolio-badge--personal {
    background: rgba(124, 58, 237, 0.85);
    color: var(--white);
    backdrop-filter: blur(8px);
}

.portfolio-item--featured {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
    height: 100%;
}

.portfolio-item--featured .portfolio-image,
.portfolio-item--featured .portfolio-image-placeholder {
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
    object-fit: cover;
    object-position: top center;
}

@media (max-width: 640px) {
    .portfolio-item--featured {
        grid-column: span 1;
        grid-row: span 1;
        aspect-ratio: 16 / 10;
        height: auto;
    }

    .portfolio-item--featured .portfolio-image,
    .portfolio-item--featured .portfolio-image-placeholder {
        position: static;
    }
}

/* ========================================
   Portfolio Detail Page
   ======================================== */

.portfolio-detail-hero {
    position: relative;
    min-height: 60vh;
    margin-top: 80px;
    display: flex;
    align-items: flex-end;
    background-color: var(--primary-900);
    background-size: cover;
    background-position: top center;
    background-repeat: no-repeat;
}

.portfolio-detail-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(10, 22, 40, 0.97) 0%,
        rgba(10, 22, 40, 0.85) 40%,
        rgba(10, 22, 40, 0.7) 100%
    );
    display: flex;
    align-items: flex-end;
    padding: var(--space-3xl) 0;
}

.portfolio-detail-back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--gray-300);
    font-size: var(--text-sm);
    margin-top: var(--space-xl);
    transition: color var(--transition-fast);
    position: relative;
    z-index: 1;
}

.portfolio-detail-back:hover {
    color: var(--accent-500);
}

.portfolio-detail-header {
    position: relative;
    z-index: 1;
}

.portfolio-detail-badges {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.portfolio-detail-category {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-500);
}

.portfolio-detail-personal-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(124, 58, 237, 0.2);
    border: 1px solid var(--secondary-500);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--secondary-300);
    letter-spacing: 0.05em;
}

.portfolio-detail-title {
    font-size: var(--text-4xl);
    margin-bottom: var(--space-md);
}

.portfolio-detail-short {
    font-size: var(--text-lg);
    color: var(--gray-300);
    max-width: 700px;
    margin-bottom: var(--space-xl);
}

.portfolio-detail-meta {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.portfolio-detail-year {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--gray-400);
    font-size: var(--text-sm);
}

.portfolio-detail-year svg {
    color: var(--accent-500);
}

.portfolio-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.portfolio-detail-tag {
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--gray-300);
}


.portfolio-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

@media (max-width: 768px) {
    .portfolio-detail-content {
        grid-template-columns: 1fr;
    }
}

.portfolio-detail-about h2,
.portfolio-detail-features h2 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-lg);
}

.portfolio-detail-about p {
    color: var(--gray-300);
    line-height: 1.8;
}

.portfolio-detail-features ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.portfolio-detail-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    color: var(--gray-300);
    line-height: 1.6;
}

.portfolio-detail-features li svg {
    flex-shrink: 0;
    margin-top: 4px;
    color: var(--accent-500);
}

.portfolio-detail-techgrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
    max-width: 800px;
    margin: 0 auto;
}

.portfolio-detail-techitem {
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-card);
    border: 1px solid var(--gray-800);
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 500;
    color: var(--gray-200);
    transition: all var(--transition-fast);
}

.portfolio-detail-techitem:hover {
    border-color: var(--accent-500);
    transform: translateY(-2px);
}

.portfolio-detail-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

@media (max-width: 640px) {
    .portfolio-detail-gallery {
        grid-template-columns: 1fr;
    }
}

.portfolio-detail-gallery-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.portfolio-detail-gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-detail-gallery-item:hover img {
    transform: scale(1.05);
}

.portfolio-detail-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--space-xl);
}

.portfolio-detail-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid var(--gray-800);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
    max-width: 45%;
}

.portfolio-detail-nav-link:hover {
    border-color: var(--accent-500);
    transform: translateY(-2px);
}

.portfolio-detail-nav-next {
    margin-left: auto;
    text-align: right;
}

.portfolio-detail-nav-label {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-500);
    margin-bottom: var(--space-xs);
}

.portfolio-detail-nav-title {
    display: block;
    font-weight: 600;
    color: var(--white);
}

.portfolio-detail-nav-link svg {
    flex-shrink: 0;
    color: var(--gray-400);
}

.portfolio-detail-notfound {
    text-align: center;
    padding: var(--space-5xl) 0;
}

.portfolio-detail-notfound h2 {
    margin-bottom: var(--space-xl);
}

@media (max-width: 640px) {
    .portfolio-detail-nav {
        flex-direction: column;
    }

    .portfolio-detail-nav-link {
        max-width: 100%;
    }

    .portfolio-detail-nav-next {
        margin-left: 0;
    }
}

/* ========================================
   Process Section
   ======================================== */

.process-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-800);
}

@media (min-width: 768px) {
    .process-timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
}

.process-item {
    position: relative;
    padding-left: 64px;
    padding-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
    .process-item {
        padding-left: 0;
        padding-right: 0;
        width: 50%;
    }

    .process-item:nth-child(odd) {
        margin-left: auto;
        padding-left: var(--space-2xl);
    }

    .process-item:nth-child(even) {
        padding-right: var(--space-2xl);
        text-align: right;
    }
}

.process-number {
    position: absolute;
    left: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-800);
    border: 2px solid var(--accent-500);
    border-radius: 50%;
    font-weight: 700;
    color: var(--accent-500);
}

@media (min-width: 768px) {
    .process-item:nth-child(odd) .process-number {
        left: -24px;
    }

    .process-item:nth-child(even) .process-number {
        right: -24px;
        left: auto;
    }
}

.process-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
}

.process-description {
    color: var(--gray-400);
    font-size: var(--text-sm);
}

/* ========================================
   Technologies Section
   ======================================== */

.tech-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-lg);
}

@media (max-width: 1024px) {
    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 640px) {
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--gray-800);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.tech-item:hover {
    border-color: var(--accent-500);
    transform: translateY(-2px);
}

.tech-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-icon svg,
.tech-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.tech-name {
    font-size: var(--text-sm);
    color: var(--gray-300);
    text-align: center;
}

/* ========================================
   Testimonials Section
   ======================================== */

.testimonials-wrapper {
    position: relative;
    overflow: hidden;
}

.testimonials-track {
    display: flex;
    gap: var(--space-xl);
    transition: transform var(--transition-slow);
}

.testimonial-card {
    flex: 0 0 calc(33.333% - var(--space-lg));
    min-width: 300px;
    padding: var(--space-2xl);
    background: var(--gradient-card);
    border: 1px solid var(--gray-800);
    border-radius: var(--radius-xl);
}

@media (max-width: 1024px) {
    .testimonial-card {
        flex: 0 0 calc(50% - var(--space-md));
    }
}

@media (max-width: 640px) {
    .testimonial-card {
        flex: 0 0 100%;
    }
}

.testimonial-quote {
    font-size: var(--text-lg);
    color: var(--gray-200);
    margin-bottom: var(--space-xl);
    font-style: italic;
    line-height: 1.8;
}

.testimonial-quote::before {
    content: '"';
    font-size: var(--text-4xl);
    color: var(--accent-500);
    line-height: 0;
    margin-right: var(--space-xs);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--white);
}

.testimonial-name {
    font-weight: 600;
    color: var(--white);
}

.testimonial-role {
    font-size: var(--text-sm);
    color: var(--gray-400);
}

.testimonials-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-2xl);
}

.testimonials-nav button {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--gray-700);
    border-radius: 50%;
    color: var(--gray-400);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.testimonials-nav button:hover {
    border-color: var(--accent-500);
    color: var(--accent-500);
}

.testimonials-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.testimonials-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-700);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.testimonials-dot.active {
    background: var(--accent-500);
    width: 24px;
    border-radius: var(--radius-full);
}

/* ========================================
   Contact Section
   ======================================== */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.contact-item {
    display: flex;
    gap: var(--space-md);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: var(--accent-500);
}

.contact-label {
    font-size: var(--text-sm);
    color: var(--gray-400);
    margin-bottom: var(--space-xs);
}

.contact-value {
    font-weight: 500;
    color: var(--white);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-300);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--gray-700);
    border-radius: var(--radius-md);
    color: var(--white);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-500);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.3);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--gray-500);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.form-error {
    font-size: var(--text-xs);
    color: var(--error);
}

.form-success {
    padding: var(--space-lg);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    border-radius: var(--radius-md);
    color: var(--success);
    text-align: center;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    background: var(--primary-900);
    border-top: 1px solid var(--gray-800);
}

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

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

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-description {
    color: var(--gray-400);
    font-size: var(--text-sm);
    line-height: 1.7;
}

.footer-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--space-lg);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-link {
    color: var(--gray-400);
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent-500);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-500);
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--gray-800);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.copyright {
    color: var(--gray-500);
    font-size: var(--text-sm);
}

/* ========================================
   Scroll Reveal Animation
   ======================================== */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ========================================
   Accessibility - Focus Visible
   ======================================== */

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--accent-500);
    outline-offset: 2px;
}

.form-input:focus-visible,
.form-textarea:focus-visible,
.form-select:focus-visible {
    outline: none;
}

/* ========================================
   Button Disabled State
   ======================================== */

.btn:disabled,
.btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* ========================================
   Keyframe Animations
   ======================================== */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ========================================
   Blazor Error UI
   ======================================== */

#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    background: var(--error);
    color: var(--white);
    text-align: center;
    z-index: 9999;
}

#blazor-error-ui .reload {
    color: var(--white);
    text-decoration: underline;
    margin-left: var(--space-sm);
}

#blazor-error-ui .dismiss {
    position: absolute;
    right: var(--space-md);
    cursor: pointer;
}

/* ========================================
   Utilities
   ======================================== */

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-auto { margin-top: auto; }
.mb-0 { margin-bottom: 0; }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ========================================
   Comprehensive Responsive Fixes
   ======================================== */

/* Tablet fixes (768px) - MUST come before 480px so narrower breakpoint wins */
@media (max-width: 768px) {
    .hero-shapes .shape-1 {
        width: 120px;
        height: 120px;
    }

    .hero-shapes .shape-2 {
        width: 60px;
        height: 60px;
    }

    .hero-shapes .shape-3 {
        width: 80px;
        height: 80px;
    }

    .portfolio-detail-hero {
        min-height: 50vh;
    }

    .portfolio-detail-hero {
        margin-top: 70px;
    }

    .portfolio-detail-title {
        font-size: var(--text-3xl);
    }

    .portfolio-detail-meta {
        flex-wrap: wrap;
        gap: var(--space-md);
    }

    .portfolio-detail-nav-link {
        max-width: 48%;
        padding: var(--space-md);
    }

    .portfolio-detail-nav-title {
        font-size: var(--text-sm);
    }

    .testimonials-track {
        flex-wrap: wrap;
    }
}

/* Small screens (480px and below) */
@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }

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

    .hero-cta {
        flex-direction: column;
    }

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

    .hero-shapes .shape {
        display: none;
    }

    .nav-actions .btn-primary.btn-sm {
        display: none;
    }

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

    .portfolio-detail-hero {
        min-height: 40vh;
    }

    .portfolio-detail-hero-overlay {
        padding-bottom: var(--space-xl);
    }

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

    .portfolio-detail-short {
        font-size: var(--text-base);
    }

    .portfolio-detail-meta {
        flex-wrap: wrap;
    }

    .portfolio-detail-badges {
        flex-wrap: wrap;
    }

    .portfolio-detail-tags {
        gap: var(--space-xs);
    }

    .portfolio-detail-tag {
        font-size: var(--text-xs);
        padding: 2px var(--space-sm);
    }

    .portfolio-detail-about h2,
    .portfolio-detail-features h2 {
        font-size: var(--text-xl);
    }

    .portfolio-detail-techgrid {
        grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    }


    .process-item {
        padding-left: 56px;
    }

    .process-number {
        width: 40px;
        height: 40px;
        font-size: var(--text-sm);
    }

    .process-timeline::before {
        left: 19px;
    }

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

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

    .contact-grid {
        gap: var(--space-xl);
    }

    .testimonial-card {
        min-width: auto;
    }
}