/* ==========================================================================
   Digital Studio (digital-studio.cz) – Design System & Styles
   Dark Anthracite Aesthetic | Purple & Blue Accents | Accessible & Responsive
   ========================================================================== */

:root {
    /* Colors */
    --bg-primary: #0B0D12;
    --bg-secondary: #11141D;
    --bg-surface: #161A26;
    --bg-surface-hover: #1D2232;
    --bg-glass: rgba(17, 20, 29, 0.78);

    --text-primary: #F8FAFC;
    --text-secondary: #A1A9B8;
    --text-muted: #6E7787;

    --accent-purple: #8B5CF6;
    --accent-purple-dark: #7C3AED;
    --accent-blue: #3B82F6;
    --accent-cyan: #38BDF8;

    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
    --gradient-primary-hover: linear-gradient(135deg, #7C3AED 0%, #2563EB 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(139, 92, 246, 0.14) 0%, rgba(59, 130, 246, 0.14) 100%);

    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(139, 92, 246, 0.45);
    --border-focus: #8B5CF6;

    --error-color: #F87171;
    --success-color: #34D399;
    --info-color: #60A5FA;

    /* Typography */
    --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Layout & Spacing */
    --container-max: 1200px;
    --header-height: 76px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Shadows & Transitions */
    --shadow-card: 0 12px 32px -8px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 32px rgba(139, 92, 246, 0.28);
    --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul,
ol {
    list-style: none;
}

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    background: none;
    border: none;
}

:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 3px;
}

/* Accessibility Helpers */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--gradient-primary);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 16px;
}

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

/* Ambient Glow */
.ambient-glow {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(130px);
    opacity: 0.16;
}

.glow-orb--purple {
    width: 560px;
    height: 560px;
    background: var(--accent-purple);
    top: -140px;
    left: -120px;
}

.glow-orb--blue {
    width: 520px;
    height: 520px;
    background: var(--accent-blue);
    top: 25%;
    right: -160px;
}

/* Container & Layout */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: 24px;
}

.section {
    padding-block: 100px;
    position: relative;
}

.section--alt {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

/* Typography Utilities */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

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

.section-eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-purple);
    margin-bottom: 12px;
}

.section-header {
    max-width: 680px;
    margin-bottom: 56px;
}

.section-title {
    font-size: clamp(1.85rem, 3.4vw, 2.65rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn--sm {
    padding: 10px 18px;
    font-size: 0.875rem;
}

.btn--lg {
    padding: 15px 28px;
    font-size: 1rem;
}

.btn--full {
    width: 100%;
    padding: 14px 24px;
}

.btn--primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
    box-shadow: 0 8px 24px -6px rgba(139, 92, 246, 0.5);
}

.btn--primary:hover {
    background: var(--gradient-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -6px rgba(139, 92, 246, 0.65);
}

.btn--secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn--secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn--ghost {
    color: var(--text-primary);
    padding: 8px 0;
    font-size: 0.9375rem;
}

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

.btn--ghost svg {
    transition: transform var(--transition-fast);
}

.btn--ghost:hover svg {
    transform: translateX(4px);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.site-header.is-scrolled {
    background: rgba(11, 13, 18, 0.92);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding-block: 6px;
}

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

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav-cta-mobile {
    display: none;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   1. Hero Section
   ========================================================================== */
.hero {
    padding-top: 76px;
    padding-bottom: 108px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 56px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 7px 14px;
    border-radius: 999px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 10px var(--accent-purple);
}

.hero-title {
    font-size: clamp(2.25rem, 4.4vw, 3.5rem);
    font-weight: 800;
    line-height: 1.12;
    margin-bottom: 22px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin-bottom: 34px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 40px;
}

.hero-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.highlight-icon {
    color: var(--accent-purple);
    font-size: 0.875rem;
}

/* Hero Visual Card */
.studio-card {
    background: linear-gradient(160deg, rgba(26, 31, 46, 0.9) 0%, rgba(17, 20, 29, 0.95) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    overflow: hidden;
    position: relative;
}

.studio-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.45), rgba(59, 130, 246, 0.15), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.studio-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: rgba(11, 13, 18, 0.65);
    border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
    display: flex;
    gap: 7px;
}

.window-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
}

.window-dots span:nth-child(1) { background: #EF4444; opacity: 0.8; }
.window-dots span:nth-child(2) { background: #F59E0B; opacity: 0.8; }
.window-dots span:nth-child(3) { background: #10B981; opacity: 0.8; }

.window-url {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.studio-card__body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.metric-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.metric-box {
    background: rgba(11, 13, 18, 0.55);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px;
}

.metric-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.metric-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 8px;
}

.metric-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 999px;
}

.metric-fill--blue {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
}

.metric-val {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.code-preview {
    background: #0B0D12;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 18px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    color: #CBD5E1;
}

.code-line.indent {
    padding-left: 20px;
}

.c-purple { color: #A78BFA; }
.c-blue { color: #60A5FA; }
.c-green { color: #34D399; }

.studio-card__footer {
    display: flex;
    justify-content: flex-start;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(52, 211, 153, 0.08);
    border: 1px solid rgba(52, 211, 153, 0.25);
    padding: 6px 12px;
    border-radius: 999px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}

/* ==========================================================================
   2. O nás
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 56px;
    align-items: start;
}

.section-text {
    color: var(--text-secondary);
    font-size: 1.03125rem;
    margin-bottom: 18px;
}

.about-pillars {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.pillar-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.pillar-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.pillar-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--gradient-subtle);
    color: var(--accent-purple);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.pillar-card h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.pillar-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ==========================================================================
   3. Služby
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.service-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 26px 24px;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    background: var(--bg-surface-hover);
}

.service-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-sm);
    background: var(--gradient-subtle);
    border: 1px solid rgba(139, 92, 246, 0.25);
    color: var(--accent-blue);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.service-card h3 {
    font-size: 1.125rem;
    margin-bottom: 10px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.6;
}

/* ==========================================================================
   4. Portfolio (Koncepty)
   ========================================================================== */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 36px;
}

.filter-btn {
    padding: 9px 18px;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-fast);
}

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

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.project-card.is-hidden {
    display: none;
}

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

.project-preview {
    height: 210px;
    position: relative;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-preview--1 {
    background: linear-gradient(135deg, #1E1B4B 0%, #111827 100%);
}

.project-preview--2 {
    background: linear-gradient(135deg, #172554 0%, #0F172A 100%);
}

.project-preview--3 {
    background: linear-gradient(135deg, #2E1065 0%, #1E3A8A 100%);
}

.concept-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    font-size: 0.725rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 5px 10px;
    border-radius: 6px;
    background: rgba(11, 13, 18, 0.85);
    border: 1px solid rgba(139, 92, 246, 0.45);
    color: #E2E8F0;
}

/* CSS UI Wireframe Mockups */
.mockup-ui {
    width: 82%;
    height: 132px;
    background: rgba(11, 13, 18, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 16px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

.mockup-nav {
    height: 8px;
    width: 45%;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.2);
}

.mockup-hero-block {
    height: 44px;
    border-radius: 6px;
    background: linear-gradient(90deg, rgba(139, 92, 246, 0.35), rgba(59, 130, 246, 0.25));
}

.mockup-cards-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    flex: 1;
}

.mockup-cards-row span {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
}

.mockup-shop-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    flex: 1;
}

.mockup-item {
    background: rgba(59, 130, 246, 0.18);
    border: 1px solid rgba(59, 130, 246, 0.28);
    border-radius: 5px;
}

.mockup-ui--brand {
    align-items: center;
    justify-content: center;
}

.mockup-logo-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: #fff;
}

.mockup-swatches {
    display: flex;
    gap: 8px;
}

.mockup-swatches span {
    width: 24px;
    height: 8px;
    border-radius: 4px;
}

.mockup-swatches span:nth-child(1) { background: #8B5CF6; }
.mockup-swatches span:nth-child(2) { background: #3B82F6; }
.mockup-swatches span:nth-child(3) { background: #F8FAFC; }

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

.project-category {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-blue);
    display: block;
    margin-bottom: 6px;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.project-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 18px;
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.project-tech span {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   5. Proč Digital Studio
   ========================================================================== */
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.why-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    position: relative;
}

.why-number {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 14px;
}

.why-card h3 {
    font-size: 1.125rem;
    margin-bottom: 10px;
}

.why-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   6. Reference (Připravený prostor)
   ========================================================================== */
.reference-placeholder {
    background: linear-gradient(145deg, var(--bg-surface) 0%, var(--bg-secondary) 100%);
    border: 1px dashed rgba(139, 92, 246, 0.35);
    border-radius: var(--radius-xl);
    padding: 56px 40px;
    text-align: center;
    max-width: 920px;
    margin-inline: auto;
}

.reference-badge {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-purple);
    background: var(--gradient-subtle);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.reference-placeholder .section-subtitle {
    max-width: 640px;
    margin-inline: auto;
    margin-bottom: 36px;
}

.reference-slots {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 680px;
    margin: 0 auto 36px;
}

.slot-card {
    background: rgba(11, 13, 18, 0.55);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 22px;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.slot-line {
    height: 8px;
    width: 100%;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
}

.slot-line--short { width: 42%; background: rgba(139, 92, 246, 0.22); }
.slot-line--med { width: 74%; }

.slot-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ==========================================================================
   7. Průběh spolupráce
   ========================================================================== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    counter-reset: step-counter;
}

.process-step {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 28px 24px;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #FFFFFF;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9375rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-line {
    height: 1px;
    flex: 1;
    background: var(--border-subtle);
}

.process-step h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.process-step p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   8. Ceník
   ========================================================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    align-items: stretch;
}

.pricing-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

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

.pricing-card--featured {
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.12) 0%, var(--bg-surface) 45%);
    border-color: rgba(139, 92, 246, 0.55);
    box-shadow: var(--shadow-glow);
}

.featured-badge {
    position: absolute;
    top: -13px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: #FFFFFF;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 999px;
    white-space: nowrap;
}

.pricing-header {
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-subtle);
}

.plan-name {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.plan-tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-height: 44px;
    margin-bottom: 18px;
}

.plan-price {
    background: rgba(11, 13, 18, 0.6);
    border: 1px dashed rgba(255, 255, 255, 0.16);
    border-radius: var(--radius-sm);
    padding: 12px;
}

.price-value {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-note {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.plan-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
    flex: 1;
}

.plan-features li {
    position: relative;
    padding-left: 22px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.plan-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-purple);
    font-weight: 700;
}

/* ==========================================================================
   9. Kontakt & Formulář
   ========================================================================== */
.contact-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
    align-items: start;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-item__icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--accent-purple);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item__label {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.contact-item__value {
    font-weight: 600;
    color: var(--text-primary);
}

a.contact-item__value:hover {
    color: var(--accent-purple);
}

.contact-form-wrapper {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-card);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

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

.form-group input[type="text"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.18);
}

.form-group input.is-invalid,
.form-group select.is-invalid,
.form-group textarea.is-invalid {
    border-color: var(--error-color);
}

.field-error {
    font-size: 0.8125rem;
    color: var(--error-color);
    min-height: 18px;
}

.form-group--checkbox {
    gap: 6px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    margin-top: 3px;
    accent-color: var(--accent-purple);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.checkbox-label a {
    color: var(--accent-blue);
    text-decoration: underline;
}

.form-status {
    padding: 16px;
    border-radius: var(--radius-sm);
    font-size: 0.925rem;
    line-height: 1.55;
}

.form-status--info {
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.35);
    color: #DBEAFE;
}

.form-status--success {
    background: rgba(52, 211, 153, 0.12);
    border: 1px solid rgba(52, 211, 153, 0.35);
    color: #D1FAE5;
}

.form-status--error {
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: #FEE2E2;
}

/* ==========================================================================
   10. Footer
   ========================================================================== */
.site-footer {
    background: #08090D;
    border-top: 1px solid var(--border-subtle);
    padding-top: 72px;
    padding-bottom: 36px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.9fr 0.9fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--border-subtle);
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.925rem;
    margin-top: 16px;
    margin-bottom: 24px;
    max-width: 340px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: #FFFFFF;
    border-color: var(--accent-purple);
    background: var(--bg-surface-hover);
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 0.9375rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--text-primary);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.footer-col a,
.footer-contact-list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.footer-cta-link {
    color: var(--accent-purple) !important;
    font-weight: 600;
}

.footer-bottom {
    padding-top: 28px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legal-link {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.legal-link:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

/* ==========================================================================
   Modals (Dialog)
   ========================================================================== */
.modal {
    margin: auto;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    background: var(--bg-surface);
    color: var(--text-primary);
    max-width: 640px;
    width: calc(100% - 32px);
    padding: 0;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.75);
}

.modal::backdrop {
    background: rgba(5, 7, 11, 0.78);
    backdrop-filter: blur(6px);
}

.modal-inner {
    padding: 28px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 18px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
}

.modal-header .concept-badge {
    position: static;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 1.5rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.modal-body--text h4 {
    font-size: 1rem;
    margin-top: 16px;
    margin-bottom: 6px;
}

.modal-body--text p {
    font-size: 0.925rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.modal-project-title {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.modal-project-cat {
    color: var(--accent-blue);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: block;
}

.modal-project-desc {
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.modal-project-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 22px;
    padding-left: 18px;
    list-style: disc;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ==========================================================================
   Scroll Reveal Animations
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1), transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1080px) {
    .hero-container,
    .about-grid,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

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

@media (max-width: 820px) {
    .mobile-toggle {
        display: flex;
    }

    .header-cta {
        display: none;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(11, 13, 18, 0.98);
        border-bottom: 1px solid var(--border-subtle);
        padding: 24px;
        flex-direction: column;
        gap: 20px;
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition-smooth), opacity var(--transition-smooth);
    }

    .main-nav.is-open {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        width: 100%;
    }

    .nav-link {
        font-size: 1.0625rem;
    }

    .nav-cta-mobile {
        display: inline-flex;
        width: 100%;
    }
}

@media (max-width: 640px) {
    .section {
        padding-block: 72px;
    }

    .services-grid,
    .why-grid,
    .pricing-grid,
    .portfolio-grid,
    .process-grid,
    .reference-slots,
    .form-row,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 24px 20px;
    }

    .reference-placeholder {
        padding: 36px 20px;
    }
}