/* =============================================================
   Karetní klub — Design System
   Barevná identita odvozená z vizuálu: zelené sukno, mahagon,
   zlaté zdobení, krémový pergamen.
   ============================================================= */

:root {
    /* --- Barvy: sukno (zelená) --- */
    --c-felt-900: #08321f;
    --c-felt-800: #0c3f28;
    --c-felt-700: #114e31;
    --c-felt-600: #16633e;
    --c-felt-500: #1d7a4c;

    /* --- Barvy: mahagon (dřevěný rám, sytě vínový do červena) --- */
    --c-wood-900: #3d150c;
    --c-wood-800: #561c10;
    --c-wood-700: #7a2817;
    --c-wood-600: #9c3620;

    /* --- Barvy: zlatá (zdobení, akcenty) --- */
    --c-gold-500: #c9a227;
    --c-gold-400: #d9b84a;
    --c-gold-300: #e6cd78;
    --c-gold-200: #f0e0a8;

    /* --- Barvy: pergamen (krémové panely) --- */
    --c-cream-100: #f7f1e1;
    --c-cream-200: #efe6cf;
    --c-cream-300: #e3d5b5;

    /* --- Barvy: karetní červená (srdce / kára) --- */
    --c-red-500: #a8231f;
    --c-red-400: #c4332d;

    /* --- Sémantické tokeny --- */
    --bg-page: var(--c-felt-800);
    --bg-panel: var(--c-cream-100);
    --bg-panel-dark: var(--c-felt-900);
    --text-on-dark: var(--c-cream-100);
    --text-on-dark-muted: #b9c9bb;
    --text-on-light: var(--c-wood-900);
    --text-on-light-muted: #6b5840;
    --accent: var(--c-gold-500);
    --accent-bright: var(--c-gold-300);
    --border-gold: rgba(201, 162, 39, 0.45);
    --border-wood: var(--c-wood-700);

    /* --- Typografie --- */
    --font-display: "Playfair Display", "Georgia", serif;
    --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
    --font-eyebrow: "Source Sans 3", system-ui, sans-serif;

    --fs-eyebrow: 0.78rem;
    --fs-body-sm: 0.9rem;
    --fs-body: 1rem;
    --fs-lead: 1.25rem;
    --fs-h3: 1.6rem;
    --fs-h2: 2.2rem;
    --fs-h1: clamp(2.8rem, 6vw, 4.8rem);

    --lh-tight: 1.1;
    --lh-snug: 1.3;
    --lh-body: 1.6;

    /* --- Prostor --- */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;
    --space-9: 6rem;

    /* --- Rádiusy --- */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    /* --- Stíny --- */
    --shadow-panel: 0 18px 50px rgba(0, 0, 0, 0.45);
    --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.28);
    --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.4);
    --shadow-inset-gold: inset 0 0 0 1px var(--border-gold);

    /* --- Přechody --- */
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --dur: 0.28s;

    /* --- Šířka obsahu --- */
    --content-max: 1320px;
}

/* ----------------------------------------------------------- */
/* Reset & základ                                              */
/* ----------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: var(--lh-body);
    color: var(--text-on-dark);
    background-color: var(--c-felt-800);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: var(--lh-tight);
    margin: 0;
}

p { margin: 0; }

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

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

/* ----------------------------------------------------------- */
/* Typografické utility                                        */
/* ----------------------------------------------------------- */
.eyebrow {
    font-family: var(--font-eyebrow);
    font-size: var(--fs-eyebrow);
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent-bright);
}

/* Zdobený nadpis sekce s ornamenty po stranách */
.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    font-family: var(--font-eyebrow);
    font-size: var(--fs-eyebrow);
    font-weight: 700;
    letter-spacing: 0.24em;
    text-transform: uppercase;
}

.section-title::before,
.section-title::after {
    content: "";
    width: clamp(40px, 12vw, 130px);
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent) 60%, var(--accent));
}

.section-title::after {
    background: linear-gradient(90deg, var(--accent), var(--accent) 40%, transparent);
}

/* ----------------------------------------------------------- */
/* Layout helpery                                              */
/* ----------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--content-max);
    margin-inline: auto;
    padding-inline: var(--space-6);
}

/* ----------------------------------------------------------- */
/* Tlačítka                                                    */
/* ----------------------------------------------------------- */
.btn {
    --btn-bg: transparent;
    --btn-fg: var(--text-on-dark);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
    background: var(--btn-bg);
    color: var(--btn-fg);
    cursor: pointer;
    white-space: nowrap;
    transition: transform var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                background var(--dur) var(--ease);
    box-shadow: var(--shadow-inset-gold);
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35), var(--shadow-inset-gold);
}

.btn:focus-visible {
    outline: 2px solid var(--accent-bright);
    outline-offset: 3px;
}

.btn .btn-arrow {
    transition: transform var(--dur) var(--ease);
}

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

/* Primární — zlatý gradient na zeleném */
.btn--primary {
    --btn-fg: var(--c-cream-100);
    background: linear-gradient(160deg, var(--c-felt-600), var(--c-felt-800));
    border-color: var(--accent);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.12),
        inset 0 0 0 1px var(--accent),
        0 6px 18px rgba(0, 0, 0, 0.3);
}

.btn--primary:hover {
    background: linear-gradient(160deg, var(--c-felt-500), var(--c-felt-700));
}

/* Sekundární — pergamen */
.btn--secondary {
    --btn-fg: var(--text-on-light);
    background: var(--c-cream-200);
    border-color: var(--c-wood-600);
    box-shadow: inset 0 0 0 1px rgba(116, 69, 42, 0.3);
}

.btn--secondary:hover {
    background: var(--c-cream-100);
}

/* Ghost — jen text + okraj (navbar) */
.btn--ghost {
    padding: var(--space-3) var(--space-5);
    border-color: transparent;
    box-shadow: none;
}

.btn--ghost:hover {
    box-shadow: none;
    background: rgba(247, 241, 225, 0.06);
}

.btn--sm {
    padding: var(--space-3) var(--space-4);
    font-size: var(--fs-body-sm);
}

/* ----------------------------------------------------------- */
/* Přístupnost                                                 */
/* ----------------------------------------------------------- */
:focus-visible {
    outline: 2px solid var(--accent-bright);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

.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;
}