/* ============================================================
   SW4Y Design System — Blazor Implementation
   ============================================================ */

/* Fonty se načítají přes <link> v App.razor pro lepší LCP */

:root {
    /* Brand colors */
    --sw4y-cyan-50: #ECFEFE;
    --sw4y-cyan-100: #C9FBFB;
    --sw4y-cyan-200: #9CF5F5;
    --sw4y-cyan-300: #60F0F0;
    --sw4y-cyan-400: #2DD9D9;
    --sw4y-cyan-500: #14B8B8;
    --sw4y-cyan-600: #0E9494;
    --sw4y-cyan-700: #0B7373;
    --sw4y-cyan-800: #0A5757;
    --sw4y-cyan-900: #093F3F;

    --sw4y-navy-50: #F2F5F9;
    --sw4y-navy-100: #DDE5EF;
    --sw4y-navy-200: #B6C4D8;
    --sw4y-navy-300: #8095B3;
    --sw4y-navy-400: #4F6585;
    --sw4y-navy-500: #2E4262;
    --sw4y-navy-600: #1E2F4A;
    --sw4y-navy-700: #142339;
    --sw4y-navy-800: #0D1A2D;
    --sw4y-navy-900: #07111F;

    --sw4y-ink-50: #F7F8FA;
    --sw4y-ink-100: #EFF1F5;
    --sw4y-ink-200: #DEE3EB;
    --sw4y-ink-300: #C4CCD8;
    --sw4y-ink-400: #97A2B3;
    --sw4y-ink-500: #6A7588;
    --sw4y-ink-600: #4A5365;
    --sw4y-ink-700: #333A48;
    --sw4y-ink-800: #1F242E;
    --sw4y-ink-900: #0F1218;

    /* Semantic */
    --sw4y-success: #14A86A;
    --sw4y-warning: #D98E0B;
    --sw4y-danger: #D6443D;

    /* Surfaces */
    --bg: #FFFFFF;
    --bg-soft: var(--sw4y-ink-50);
    --bg-muted: var(--sw4y-ink-100);
    --bg-inverse: var(--sw4y-navy-900);

    --fg: var(--sw4y-navy-900);
    --fg-strong: #000814;
    --fg-muted: var(--sw4y-ink-600);
    --fg-subtle: var(--sw4y-ink-500);
    --fg-on-dark: #FFFFFF;

    --border: var(--sw4y-ink-200);
    --border-strong: var(--sw4y-ink-300);
    --border-inverse: rgba(255, 255, 255, 0.10);

    --accent: var(--sw4y-cyan-300);
    --accent-hover: var(--sw4y-cyan-400);
    --accent-press: var(--sw4y-cyan-500);
    --accent-soft: var(--sw4y-cyan-50);
    --accent-on: var(--sw4y-navy-900);

    --link: var(--sw4y-cyan-700);
    --link-hover: var(--sw4y-cyan-800);

    /* Type */
    --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
    --font-sans: "Inter", system-ui, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;

    --fs-12: 0.75rem;
    --fs-14: 0.875rem;
    --fs-16: 1rem;
    --fs-18: 1.125rem;
    --fs-20: 1.25rem;
    --fs-24: 1.5rem;
    --fs-30: 1.875rem;
    --fs-36: 2.25rem;
    --fs-48: 3rem;
    --fs-60: 3.75rem;

    /* Spacing */
    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 0.75rem;
    --sp-4: 1rem;
    --sp-5: 1.25rem;
    --sp-6: 1.5rem;
    --sp-8: 2rem;
    --sp-10: 2.5rem;
    --sp-12: 3rem;
    --sp-16: 4rem;
    --sp-20: 5rem;
    --sp-24: 6rem;
    --sp-32: 8rem;

    /* Radii */
    --r-sm: 4px;
    --r-md: 8px;
    --r-lg: 12px;
    --r-xl: 16px;
    --r-2xl: 24px;
    --r-pill: 999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(15, 24, 38, 0.06);
    --shadow-sm: 0 1px 3px rgba(15, 24, 38, 0.08), 0 1px 2px rgba(15, 24, 38, 0.04);
    --shadow-md: 0 6px 16px -4px rgba(15, 24, 38, 0.10), 0 2px 4px rgba(15, 24, 38, 0.04);
    --shadow-lg: 0 16px 32px -8px rgba(15, 24, 38, 0.14), 0 4px 8px rgba(15, 24, 38, 0.04);
    --shadow-xl: 0 28px 48px -12px rgba(15, 24, 38, 0.18);
    --shadow-cyan: 0 8px 24px -8px rgba(20, 184, 184, 0.45);

    /* Motion */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --dur-fast: 120ms;
    --dur-base: 200ms;
    --dur-slow: 320ms;

    /* Layout */
    --container: 1200px;
    --container-narrow: 880px;
}

/* ============================================================
   Base styles
   ============================================================ */

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

html {
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--fg);
    background: var(--bg);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    font-size: var(--fs-16);
    line-height: 1.5;
    color: var(--fg);
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--fg-strong);
    letter-spacing: -0.01em;
    line-height: 1.1;
    margin: 0;
    text-wrap: balance;
}

h1 { font-size: var(--fs-60); font-weight: 600; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-36); font-weight: 600; }
h3 { font-size: var(--fs-24); font-weight: 600; }
h4 { font-size: var(--fs-20); font-weight: 600; }

p {
    font-size: var(--fs-16);
    line-height: 1.5;
    color: var(--fg);
    margin: 0;
    text-wrap: pretty;
}

a {
    color: var(--link);
    text-decoration: none;
    transition: color var(--dur-fast) var(--ease-out);
}

a:hover {
    color: var(--link-hover);
}

/* ============================================================
   Focus styles (WCAG 2.4.7)
   ============================================================ */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 3px solid #2DD9D9;
    outline-offset: 2px;
    border-radius: 6px;
}

/* ============================================================
   Scroll-reveal animations
   ============================================================ */

/* Base: fade up (default) */
[data-reveal] {
    opacity: 0;
    transform: translateY(48px);
    filter: blur(6px);
    transition:
        opacity 0.8s var(--ease-out),
        transform 0.8s var(--ease-out),
        filter 0.8s var(--ease-out);
    will-change: opacity, transform, filter;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

/* Variant: slide from left */
[data-reveal="left"] {
    transform: translateX(-48px) translateY(0);
}
[data-reveal="left"].revealed {
    transform: translateX(0) translateY(0);
}

/* Variant: scale up */
[data-reveal="scale"] {
    transform: scale(0.92) translateY(32px);
}
[data-reveal="scale"].revealed {
    transform: scale(1) translateY(0);
}

/* Stagger container for child cards */
[data-reveal-stagger] > * {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
    filter: blur(4px);
    transition:
        opacity 0.7s var(--ease-out),
        transform 0.7s var(--ease-out),
        filter 0.7s var(--ease-out);
}

[data-reveal-stagger].revealed > * {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
}

[data-reveal-stagger] > :nth-child(1) { transition-delay: 0.05s; }
[data-reveal-stagger] > :nth-child(2) { transition-delay: 0.15s; }
[data-reveal-stagger] > :nth-child(3) { transition-delay: 0.25s; }
[data-reveal-stagger] > :nth-child(4) { transition-delay: 0.35s; }
[data-reveal-stagger] > :nth-child(5) { transition-delay: 0.45s; }
[data-reveal-stagger] > :nth-child(6) { transition-delay: 0.55s; }

/* Hero entrance animation (above the fold, plays on load) */
@keyframes hero-fade-in {
    from {
        opacity: 0;
        transform: translateY(32px);
        filter: blur(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

.hero-content > * {
    animation: hero-fade-in 0.9s var(--ease-out) both;
}
.hero-content > :nth-child(1) { animation-delay: 0.1s; }
.hero-content > :nth-child(2) { animation-delay: 0.2s; }
.hero-content > :nth-child(3) { animation-delay: 0.35s; }
.hero-content > :nth-child(4) { animation-delay: 0.5s; }
.hero-content > :nth-child(5) { animation-delay: 0.65s; }

/* ============================================================
   Reduced motion (WCAG 2.3.3)
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    [data-reveal],
    [data-reveal-stagger] > * {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
        transition: none !important;
    }

    .hero-content > * {
        animation: none !important;
        opacity: 1 !important;
    }
}

/* ============================================================
   Utility classes
   ============================================================ */

.container {
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 24px;
}

.container-narrow {
    max-width: var(--container-narrow);
    margin-inline: auto;
    padding-inline: 24px;
}

.eyebrow {
    font-family: var(--font-sans);
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--sw4y-cyan-700);
}

.eyebrow-light {
    color: var(--sw4y-cyan-300);
}

/* ============================================================
   Button styles
   ============================================================ */

.btn {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1;
    border-radius: var(--r-pill);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    transition: background var(--dur-base) var(--ease-in-out), transform var(--dur-fast);
    border: 1px solid transparent;
    text-decoration: none;
}

a.btn:hover {
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-md { padding: 12px 22px; font-size: 14px; }
.btn-lg { padding: 15px 28px; font-size: 16px; }

.btn-primary {
    background: var(--sw4y-cyan-300);
    color: var(--sw4y-navy-900);
    box-shadow: var(--shadow-cyan);
}

.btn-primary:hover {
    background: var(--sw4y-cyan-400);
    color: var(--sw4y-navy-900);
}

.btn-secondary {
    background: var(--sw4y-navy-900);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--sw4y-navy-700);
    color: #fff;
}

.btn-on-dark {
    background: rgba(255, 255, 255, 0.10);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.55);
}

.btn-on-dark:hover {
    background: rgba(255, 255, 255, 0.20);
    color: #fff;
}

.btn-tertiary {
    background: transparent;
    color: var(--sw4y-navy-900);
    border: 1px solid var(--border-strong);
}

.btn-tertiary:hover {
    background: var(--bg-soft);
    color: var(--sw4y-navy-900);
}

/* ============================================================
   Card styles
   ============================================================ */

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.card-hoverable:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-dark {
    background: var(--sw4y-navy-800);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ============================================================
   Skip link (WCAG 2.4.1)
   ============================================================ */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 1000;
    background: #fff;
    color: var(--sw4y-navy-900);
    padding: 12px 18px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-weight: 600;
    text-decoration: underline;
    box-shadow: var(--shadow-md);
}

.skip-link:focus {
    top: 16px;
    outline: 3px solid #2DD9D9;
    outline-offset: 2px;
}

/* ============================================================
   Blazor defaults
   ============================================================ */

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

.blazor-error-boundary::after {
    content: "Došlo k neočekávané chybě."
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ============================================================
   Legal pages (GDPR, Cookies)
   ============================================================ */

.legal-page {
    padding: 120px 24px 80px;
}

.legal-page h1 {
    font-size: var(--fs-48);
    margin-bottom: var(--sp-4);
}

.legal-page .legal-updated {
    color: var(--fg-muted);
    font-size: var(--fs-14);
    margin-bottom: var(--sp-12);
}

.legal-page h2 {
    font-size: var(--fs-24);
    margin-top: var(--sp-10);
    margin-bottom: var(--sp-4);
    padding-bottom: var(--sp-2);
    border-bottom: 1px solid var(--border);
}

.legal-page h3 {
    font-size: var(--fs-20);
    margin-top: var(--sp-6);
    margin-bottom: var(--sp-3);
}

.legal-page p {
    margin-bottom: var(--sp-4);
    line-height: 1.7;
    color: var(--fg);
}

.legal-page ul {
    margin: 0 0 var(--sp-6) 0;
    padding-left: var(--sp-6);
}

.legal-page ul li {
    margin-bottom: var(--sp-2);
    line-height: 1.6;
}

.legal-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--sp-4) 0 var(--sp-6);
    font-size: var(--fs-14);
}

.legal-table th,
.legal-table td {
    padding: var(--sp-3) var(--sp-4);
    text-align: left;
    border: 1px solid var(--border);
}

.legal-table th {
    background: var(--bg-soft);
    font-weight: 600;
    color: var(--fg-strong);
}

.legal-table td code {
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    background: var(--bg-muted);
    padding: 2px 6px;
    border-radius: var(--r-sm);
}

.legal-back {
    margin-top: var(--sp-12);
    padding-top: var(--sp-8);
    border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
    .legal-page h1 {
        font-size: var(--fs-30);
    }

    .legal-table {
        font-size: var(--fs-12);
    }

    .legal-table th,
    .legal-table td {
        padding: var(--sp-2) var(--sp-3);
    }
}

/* ============================================================
   Cookie consent banner
   ============================================================ */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: var(--sw4y-navy-900);
    color: var(--fg-on-dark);
    padding: var(--sp-5) var(--sp-6);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.25);
    transform: translateY(100%);
    transition: transform var(--dur-slow) var(--ease-out);
}

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

.cookie-banner-inner {
    max-width: var(--container);
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: var(--sp-6);
    flex-wrap: wrap;
}

.cookie-banner-text {
    flex: 1;
    min-width: 280px;
    font-size: var(--fs-14);
    line-height: 1.5;
}

.cookie-banner-text a {
    color: var(--sw4y-cyan-300);
    text-decoration: underline;
}

.cookie-banner-text a:hover {
    color: var(--sw4y-cyan-200);
}

.cookie-banner-actions {
    display: flex;
    gap: var(--sp-3);
    flex-shrink: 0;
}

@media (max-width: 640px) {
    .cookie-banner-inner {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .cookie-banner-actions {
        justify-content: center;
    }
}

/* ─── Scroll-to-top button ─── */
.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--sw4y-navy-800);
    color: var(--accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0, 0, 0, .25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity .3s ease, visibility .3s ease, transform .3s ease, background .2s ease;
}

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

.scroll-top-btn:hover {
    background: var(--sw4y-navy-700);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, .3);
}

.scroll-top-btn:active {
    transform: translateY(0);
    background: var(--sw4y-navy-900);
}