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

:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-surface-alt: #f4f4f5;
    --color-text: #18181b;
    --color-text-secondary: #71717a;
    --color-accent: #2563eb;
    --color-accent-light: #eff6ff;
    --color-border: #e4e4e7;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1120px;
}

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

section[id], form[id] {
    scroll-margin-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== Skip to Content ===== */
.skip-to-content {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10000;
    background: var(--color-accent);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    transition: top 0.2s ease;
}

.skip-to-content:focus {
    top: 16px;
}

/* ===== Focus Styles ===== */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ===== Gradient Text ===== */
.gradient-text {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-light {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Container ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(37,99,235,0.25);
}

.btn-primary:hover {
    background: #1d4ed8;
    box-shadow: 0 4px 16px rgba(37,99,235,0.35);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}

.btn-ghost:hover {
    border-color: var(--color-text);
    background: var(--color-text);
    color: #fff;
}

.btn-nav {
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 250, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    display: flex;
    align-items: baseline;
}

.logo-main { color: var(--color-text); }
.logo-sub { color: var(--color-accent); font-weight: 400; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-links a:not(.btn):hover::after,
.nav-links a:not(.btn).active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active { color: var(--color-text); }

.nav-links a.btn-nav,
.nav-links a.btn-nav:hover,
.nav-links a.btn-nav.active {
    background: var(--color-accent);
    color: #fff;
}

.nav-links a.btn-nav:hover {
    background: #1d4ed8;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    position: relative;
    overflow: hidden;
}

.hero-grid-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(37,99,235,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37,99,235,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 70% 50%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 50%, black 20%, transparent 70%);
}

/* ===== Tetris Blocks in Hero ===== */
.tetris-block {
    position: absolute;
    opacity: 0.06;
    pointer-events: none;
    z-index: 0;
}

.tetris-block svg {
    width: 100%;
    height: 100%;
}

.tetris-t { width: 90px; height: 60px; top: 15%; right: 8%; animation: tetrisFall1 18s ease-in-out infinite; }
.tetris-l { width: 60px; height: 90px; top: 60%; right: 25%; animation: tetrisFall2 22s ease-in-out infinite; }
.tetris-s { width: 80px; height: 60px; top: 35%; right: 45%; animation: tetrisFall3 20s ease-in-out infinite; }
.tetris-i { width: 30px; height: 120px; top: 70%; right: 12%; animation: tetrisFall1 25s ease-in-out infinite reverse; }
.tetris-o { width: 60px; height: 60px; top: 20%; right: 35%; animation: tetrisFall2 16s ease-in-out infinite; }

@keyframes tetrisFall1 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(30px) rotate(5deg); }
}

@keyframes tetrisFall2 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(-3deg); }
}

@keyframes tetrisFall3 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(15px) rotate(4deg); }
}

.hero-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content {
    max-width: 540px;
    animation: fadeUp 0.8s ease-out;
}

.hero-label {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 28px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat-num {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--color-text);
}

.hero-stat-suffix {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-accent);
}

.hero-stat-label {
    font-size: 0.78rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
    font-weight: 500;
}

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

/* ===== Hero Code Window ===== */
.hero-visual {
    position: relative;
    animation: fadeUp 0.8s ease-out 0.2s both;
}

.code-window {
    background: #1e1e2e;
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 20px 60px rgba(0,0,0,0.15),
        0 0 0 1px rgba(255,255,255,0.05) inset;
    position: relative;
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(255,255,255,0.04);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-dot { width: 12px; height: 12px; border-radius: 50%; }
.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }

.code-filename {
    margin-left: 8px;
    font-size: 0.78rem;
    color: #6c7086;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

.code-body {
    padding: 24px;
    margin: 0;
    overflow-x: auto;
    min-height: 320px;
}

.code-body code {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.82rem;
    line-height: 1.8;
    color: #cdd6f4;
    white-space: pre;
}

.code-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: #cba6f7;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
    position: absolute;
    bottom: 24px;
    left: 24px;
}

@keyframes blink {
    50% { opacity: 0; }
}

.code-kw { color: #cba6f7; }
.code-str { color: #a6e3a1; }
.code-comment { color: #585b70; font-style: italic; }

/* Floating badges */
.floating-badge {
    position: absolute;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 10px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.floating-badge.show { opacity: 1; }

.badge-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    font-size: 0.85rem;
}

.badge-1 {
    bottom: -16px;
    left: -20px;
    animation: floatBadge 3s ease-in-out infinite;
}

.badge-1 .badge-icon { background: #dcfce7; color: #16a34a; }

.badge-2 {
    top: 20px;
    right: -16px;
    animation: floatBadge 3s ease-in-out 1.5s infinite;
}

.badge-2 .badge-icon { background: #fef3c7; color: #d97706; }

@keyframes floatBadge {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ===== Tetris Section Decorations ===== */
.tetris-deco {
    position: absolute;
    opacity: 0.05;
    pointer-events: none;
}

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

/* ===== Sections ===== */
.section { padding: 100px 0; }
.section-alt { background: var(--color-surface-alt); }

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

.label {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.section-head h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.section-desc {
    color: var(--color-text-secondary);
    margin-top: 12px;
    font-size: 1.05rem;
}

/* ===== Services ===== */
.services {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(24px);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), #7c3aed);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover::before { transform: scaleX(1); }

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    border-color: rgba(37,99,235,0.3);
    box-shadow: 0 8px 30px rgba(37,99,235,0.08), 0 2px 8px rgba(0,0,0,0.04);
    transform: translateY(-6px) scale(1.02);
}

.service-card.visible:hover { transform: translateY(-6px) scale(1.02); }

.service-icon {
    width: 48px;
    height: 48px;
    background: var(--color-accent-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: all 0.4s ease;
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--color-accent), #7c3aed);
    transform: scale(1.05);
}

.service-card:hover .service-icon svg { color: #fff; }

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

.service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.service-card p {
    color: var(--color-text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* ===== Comparison (Před vs Po) ===== */
.comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: stretch;
    max-width: 900px;
    margin: 0 auto;
}

.comparison-col {
    border-radius: var(--radius-lg);
    padding: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(24px);
    transition: var(--transition);
}

.comparison-col.visible {
    opacity: 1;
    transform: translateY(0);
}

.comparison-header {
    padding: 20px 28px;
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.comparison-header.before {
    background: #fef2f2;
    color: #dc2626;
}

.comparison-header.after {
    background: #f0fdf4;
    color: #16a34a;
}

.comparison-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 700;
}

.comparison-header.before .comparison-icon {
    background: #dc2626;
    color: #fff;
}

.comparison-header.after .comparison-icon {
    background: #16a34a;
    color: #fff;
}

.comparison-before {
    background: var(--color-surface);
    border: 1px solid #fecaca;
}

.comparison-after {
    background: var(--color-surface);
    border: 1px solid #bbf7d0;
}

.comparison-list {
    list-style: none;
    padding: 24px 28px;
}

.comparison-list li {
    padding: 10px 0;
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-surface-alt);
    line-height: 1.5;
}

.comparison-list li:last-child { border-bottom: none; }

.comparison-before .comparison-list li::before {
    content: '✕ ';
    color: #dc2626;
    font-weight: 600;
    margin-right: 4px;
}

.comparison-after .comparison-list li::before {
    content: '✓ ';
    color: #16a34a;
    font-weight: 600;
    margin-right: 4px;
}

.comparison-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(24px);
}

.comparison-arrow.visible {
    opacity: 1;
    transform: translateY(0);
}

.comparison-arrow svg {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

/* ===== Features (Proč my) ===== */
.features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature {
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(24px);
}

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

.feature:hover {
    border-color: rgba(37,99,235,0.3);
    box-shadow: 0 8px 30px rgba(37,99,235,0.08);
    transform: translateY(-4px);
}

.feature.visible:hover { transform: translateY(-4px); }

.feature-num {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.feature h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.feature p {
    color: var(--color-text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* ===== Steps (Jak pracujeme) ===== */
.steps {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    left: 23px;
    top: 40px;
    bottom: 40px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-border));
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    padding: 24px 0;
    opacity: 0;
    transform: translateY(24px);
}

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

.step-num {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 50%;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.step-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.step-body p {
    color: var(--color-text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

.step-body a { color: var(--color-accent); font-weight: 500; }
.step-body a:hover { text-decoration: underline; }

/* ===== CTA ===== */
.cta-section { background: var(--color-bg); }

.cta {
    text-align: center;
    background: linear-gradient(-45deg, #0f172a, #1e293b, #1a1a2e, #16213e);
    background-size: 400% 400%;
    animation: ctaGradient 12s ease infinite;
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 80px 48px;
    position: relative;
    overflow: hidden;
}

@keyframes ctaGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(37,99,235,0.2), transparent 70%);
    pointer-events: none;
    animation: ctaOrb1 8s ease-in-out infinite;
}

@keyframes ctaOrb1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-40px, 30px); }
}

.cta::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(124,58,237,0.15), transparent 70%);
    pointer-events: none;
    animation: ctaOrb2 10s ease-in-out infinite;
}

@keyframes ctaOrb2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -20px); }
}

.cta h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 16px;
    position: relative;
}

.cta p {
    color: #a1a1aa;
    font-size: 1.05rem;
    max-width: 520px;
    margin: 0 auto 32px;
    line-height: 1.6;
    position: relative;
}

.cta .btn-primary {
    background: #fff;
    color: var(--color-text);
    box-shadow: none;
    position: relative;
}

.cta .btn-primary:hover {
    background: var(--color-accent);
    color: #fff;
    transform: translateY(-2px);
}

/* ===== Contact ===== */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 560px;
    margin: 0 auto;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 40px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(24px);
}

.contact-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-card:hover {
    border-color: rgba(37,99,235,0.3);
    box-shadow: 0 8px 30px rgba(37,99,235,0.08);
    transform: translateY(-4px);
}

.contact-card.visible:hover { transform: translateY(-4px); }

.contact-card svg {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-value {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text);
}

/* ===== Page Loader ===== */
.page-loader {
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-tetris {
    display: flex;
    gap: 4px;
    align-items: flex-end;
    height: 40px;
}

.loader-tetris-block {
    width: 10px;
    border-radius: 2px;
    animation: tetrisLoad 1s ease-in-out infinite;
}

.loader-tetris-block:nth-child(1) { height: 30px; background: #2563eb; animation-delay: 0s; }
.loader-tetris-block:nth-child(2) { height: 20px; background: #7c3aed; animation-delay: 0.15s; }
.loader-tetris-block:nth-child(3) { height: 35px; background: #06b6d4; animation-delay: 0.3s; }
.loader-tetris-block:nth-child(4) { height: 25px; background: #2563eb; animation-delay: 0.45s; }

@keyframes tetrisLoad {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ===== Nav Overlay ===== */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 98;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ===== Numbers Section ===== */
.numbers-section {
    background: var(--color-text);
    padding: 72px 0;
}

.numbers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

.number-item {
    opacity: 0;
    transform: translateY(24px);
}

.number-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.number-value {
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.04em;
    line-height: 1;
}

.number-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: #60a5fa;
}

.number-label {
    display: block;
    margin-top: 8px;
    font-size: 0.88rem;
    color: #a1a1aa;
    font-weight: 500;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37,99,235,0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all 0.3s ease;
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37,99,235,0.4);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ===== Scroll Progress Bar ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), #7c3aed);
    z-index: 200;
    transition: width 0.05s linear;
}

/* ===== Section Head Animation ===== */
[data-aos-head] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos-head].visible {
    opacity: 1;
    transform: translateY(0);
}

[data-aos-head] .label {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease 0.2s, transform 0.5s ease 0.2s;
}

[data-aos-head].visible .label {
    opacity: 1;
    transform: translateY(0);
}

[data-aos-head] h2 {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease 0.35s, transform 0.5s ease 0.35s;
}

[data-aos-head].visible h2 {
    opacity: 1;
    transform: translateY(0);
}

[data-aos-head] .section-desc {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease 0.5s, transform 0.5s ease 0.5s;
}

[data-aos-head].visible .section-desc {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Technologies ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 28px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(24px);
}

.tech-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.tech-item:hover {
    border-color: rgba(37,99,235,0.3);
    box-shadow: 0 8px 30px rgba(37,99,235,0.08);
    transform: translateY(-4px) scale(1.03);
}

.tech-item.visible:hover { transform: translateY(-4px) scale(1.03); }

.tech-icon {
    width: 48px;
    height: 48px;
    background: var(--color-accent-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
}

.tech-item:hover .tech-icon {
    background: linear-gradient(135deg, var(--color-accent), #7c3aed);
}

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

.tech-item:hover .tech-icon svg { color: #fff; }

.tech-item span {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(24px);
}

.faq-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.faq-item:hover { border-color: rgba(37,99,235,0.3); }

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    gap: 16px;
}

.faq-chevron {
    width: 20px;
    height: 20px;
    min-width: 20px;
    color: var(--color-text-secondary);
    transition: transform 0.3s ease;
}

.faq-item.open .faq-chevron {
    transform: rotate(180deg);
    color: var(--color-accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--color-text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ===== Contact Form ===== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
    align-items: start;
}

.contact-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    opacity: 0;
    transform: translateY(24px);
}

.contact-form.visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
    opacity: 0;
    transform: translateY(24px);
}

.contact-info.visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-info .contact-card {
    opacity: 1;
    transform: none;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.92rem;
    color: var(--color-text);
    background: var(--color-bg);
    transition: var(--transition);
    outline: none;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

.btn-form {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
}

.form-note {
    text-align: center;
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    margin-top: 16px;
}

.form-note a {
    color: var(--color-accent);
    font-weight: 500;
}

.form-note a:hover { text-decoration: underline; }

.form-success {
    text-align: center;
    padding: 32px;
}

.form-success-icon {
    width: 56px;
    height: 56px;
    background: #dcfce7;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.5rem;
    color: #16a34a;
}

.form-success h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.form-success p {
    color: var(--color-text-secondary);
    font-size: 0.92rem;
}

/* ===== Code Window Tilt ===== */
.code-window {
    transition: transform 0.15s ease;
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 64px 0 32px;
    background: var(--color-surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .footer-logo {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-brand .footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    color: var(--color-text);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .services { grid-template-columns: repeat(2, 1fr); }

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

    .hero-visual { max-width: 480px; }

    .comparison {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }

    .comparison-arrow.visible {
        transform: rotate(90deg);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

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

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

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        height: 100vh;
        background: var(--color-surface);
        flex-direction: column;
        align-items: stretch;
        padding: 80px 32px 32px;
        gap: 20px;
        transform: translateX(100%);
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        z-index: 99;
    }

    .nav-links.open { transform: translateX(0); }
    .nav-links a { font-size: 1rem; }
    .nav-links a:not(.btn)::after { display: none; }

    .nav-toggle { display: flex; z-index: 101; }

    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 80px;
    }

    .hero-visual { display: none; }
    .section { padding: 72px 0; }
    .services { grid-template-columns: 1fr; }
    .features { grid-template-columns: 1fr; }
    .contact-cards { grid-template-columns: 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .cta { padding: 56px 28px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { text-align: center; }

    .hero-stats {
        gap: 20px;
    }

    .hero-stat-num { font-size: 1.5rem; }
    .hero-stat-suffix { font-size: 1.1rem; }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* ===== Cookie Banner ===== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-text);
    color: #d4d4d8;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    z-index: 300;
    transform: translateY(100%);
    transition: transform 0.4s ease;
    font-size: 0.85rem;
    line-height: 1.5;
}

.cookie-banner.visible {
    transform: translateY(0);
}

.cookie-banner.hidden {
    transform: translateY(100%);
}

.cookie-banner p { margin: 0; }

.cookie-actions { flex-shrink: 0; }

.btn-cookie-accept {
    padding: 8px 24px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-cookie-accept:hover {
    background: #1d4ed8;
}

/* ===== Animations ===== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

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

    .service-card,
    .feature,
    .step,
    .comparison-col,
    .comparison-arrow,
    .contact-card,
    .contact-form,
    .contact-info,
    .tech-item,
    .faq-item,
    .number-item,
    [data-aos-head],
    [data-aos-head] .label,
    [data-aos-head] h2,
    [data-aos-head] .section-desc {
        opacity: 1 !important;
        transform: none !important;
    }

    .hero-content {
        animation: none;
    }

    .hero-visual {
        animation: none;
    }

    html { scroll-behavior: auto; }
}