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

:root {
    /* Barvy – horská/outdoorová paleta */
    --color-primary:    #1a6fa8;   /* světle modrá */
    --color-primary-dk: #0f4d78;
    --color-accent:     #e07b2a;   /* oranžová */
    --color-accent-dk:  #c06520;
    --color-bg:         #f4f8fc;   /* světle modrá/bílá */
    --color-surface:    #ffffff;
    --color-text:       #1a1a1a;
    --color-text-muted: #5a5a5a;
    --color-border:     #ccdde8;
    --color-success:    #1e6e35;
    --color-error:      #c0392b;

    /* Typografie */
    --font-base: system-ui, "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-size-base: 1rem;
    --line-height: 1.6;

    /* Spacing */
    --space-xs:  0.25rem;
    --space-sm:  0.5rem;
    --space-md:  1rem;
    --space-lg:  2rem;
    --space-xl:  4rem;

    /* Layout */
    --container-max: 1100px;
    --navbar-height: 64px;
    --radius: 6px;
    --radius-lg: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);

    --transition: 0.2s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background: var(--color-bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); }
a:hover { color: var(--color-primary-dk); }

h1, h2, h3 { line-height: 1.2; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: var(--space-lg); }
h3 { font-size: 1.1rem; margin-bottom: var(--space-sm); }

/* ============================================================
   Layout
   ============================================================ */
.container {
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--space-lg);
}

.section {
    padding-block: var(--space-xl);
}

.section-light {
    background: var(--color-surface);
}

.section-note {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

/* ============================================================
   Navbar
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-primary);
    box-shadow: var(--shadow);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--navbar-height);
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--space-lg);
    gap: var(--space-md);
}

.nav-brand {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.nav-menu a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius);
    font-size: 0.875rem;
    transition: background var(--transition), color var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus {
    background: rgba(255,255,255,0.15);
    color: #fff;
    outline: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

/* Mobile nav */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .nav-menu {
        position: absolute;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: var(--color-primary-dk);
        flex-direction: column;
        gap: 0;
        display: none;
        padding-block: var(--space-sm);
    }

    .nav-menu.is-open { display: flex; }

    .nav-menu a {
        padding: var(--space-sm) var(--space-lg);
        border-radius: 0;
        font-size: 1rem;
    }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background:
        linear-gradient(to bottom, rgba(10,45,80,0.72) 0%, rgba(10,45,80,0.50) 100%),
        url('../images/P8301356.jpg') center/cover no-repeat;
    color: #fff;
    padding: var(--space-xl) var(--space-lg);
}

.hero-content { max-width: 700px; }

.hero-logo {
    height: 80px;
    width: auto;
    margin-inline: auto;
    margin-bottom: var(--space-md);
}

.hero-eyebrow {
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.85;
    margin-bottom: var(--space-sm);
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.hero-location {
    color: #f0c070;
}

.hero-date {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: var(--space-lg);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover, .btn-primary:focus {
    background: var(--color-accent-dk);
    border-color: var(--color-accent-dk);
    color: #fff;
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

/* Countdown */
.countdown {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-num {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1;
    color: #f0c070;
}

.countdown-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.8;
    margin-top: var(--space-xs);
}

/* ============================================================
   O semináři
   ============================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-xl);
    align-items: start;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    min-width: 120px;
    text-align: center;
}

.stat-num {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1;
}

.stat-label {
    font-size: 0.8rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: var(--space-xs);
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-stats {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* ============================================================
   Accordion
   ============================================================ */
.accordion {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.accordion-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.accordion-btn {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    transition: background var(--transition);
}

.accordion-btn:hover,
.accordion-btn[aria-expanded="true"] {
    background: #e4f0f8;
}

.accordion-icon {
    transition: transform var(--transition);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.accordion-btn[aria-expanded="true"] .accordion-icon {
    transform: rotate(180deg);
}

.accordion-panel {
    padding: var(--space-md) var(--space-lg) var(--space-lg);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.program-list, .equipment-list {
    padding-left: var(--space-lg);
}

.program-list li, .equipment-list li {
    margin-bottom: var(--space-xs);
}

.equipment-note {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* ============================================================
   Info karty & ceník
   ============================================================ */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.info-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.info-card h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.map-link {
    display: inline-block;
    margin-top: var(--space-sm);
    font-size: 0.875rem;
}

.price-title {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.table-wrap { overflow-x: auto; }

.price-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.price-table th,
.price-table td {
    padding: 0.65rem var(--space-md);
    text-align: left;
    border: 1px solid var(--color-border);
}

.price-table thead {
    background: var(--color-primary);
    color: #fff;
}

.price-table tbody tr:nth-child(even) {
    background: #edf5fc;
}

.price-note {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ============================================================
   Galerie
   ============================================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-md);
}

.gallery-thumb {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--radius);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.gallery-thumb:hover,
.gallery-thumb:focus {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

.gallery-empty {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.92);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox[hidden] { display: none; }

.lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255,255,255,0.3);
}

.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev  { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-next  { right: 1rem; top: 50%; transform: translateY(-50%); }

/* ============================================================
   Registrační formulář
   ============================================================ */
.reg-form {
    max-width: 680px;
}

.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-group {
    margin-bottom: var(--space-lg);
}

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

@media (max-width: 600px) {
    .form-row { grid-template-columns: 1fr; }
}

label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    font-size: 0.9rem;
}

.label-block { display: block; }

.req { color: var(--color-error); }

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding: 0.6rem var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26,111,168,0.15);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
    border-color: var(--color-error);
}

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

.radio-label, .checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-weight: 400;
    cursor: pointer;
}

.radio-label input,
.checkbox-label input {
    width: auto;
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.checkbox-label--required { font-weight: 600; }

.field-error {
    display: block;
    color: var(--color-error);
    font-size: 0.8rem;
    margin-top: var(--space-xs);
    min-height: 1em;
}

.form-submit {
    margin-top: var(--space-lg);
}

.form-feedback {
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius);
    font-weight: 600;
    display: none;
}

.form-feedback.success {
    background: #d4edda;
    color: var(--color-success);
    border: 1px solid #a8d5b5;
    display: block;
}

.form-feedback.error {
    background: #fde8e8;
    color: var(--color-error);
    border: 1px solid #f5c6cb;
    display: block;
}

.deadline-notice {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: var(--radius);
    padding: var(--space-md) var(--space-lg);
    color: #664d03;
}

/* ============================================================
   Kontakt
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

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

.contact-info h3,
.contact-address h3 {
    color: var(--color-primary);
    margin-top: var(--space-lg);
}

.contact-info h3:first-child,
.contact-address h3:first-child {
    margin-top: 0;
}

.contact-info p, .contact-address p {
    margin-bottom: var(--space-sm);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--color-primary-dk);
    color: rgba(255,255,255,0.75);
    padding-block: var(--space-lg);
    text-align: center;
}

.footer-brand {
    font-weight: 700;
    color: #fff;
    margin-bottom: var(--space-xs);
}

.footer-copy {
    font-size: 0.85rem;
}

/* ============================================================
   Responsive tweaks
   ============================================================ */
@media (max-width: 768px) {
    .hero { min-height: 70vh; }
    .countdown { gap: var(--space-md); }
    .countdown-num { font-size: 2rem; }
    .info-cards { grid-template-columns: 1fr; }
}

@media (min-width: 1200px) {
    .container { padding-inline: var(--space-xl); }
}