/* ============================================
   CENDIS - Components
   Buttons, Cards, Hero, Navigation...
   ============================================ */

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 30px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: var(--border-width) solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-blue);
}

.btn-outline {
    background: white;
    color: var(--primary-blue);
    border: var(--border-width) solid var(--primary-blue);
}

.btn-outline:hover {
    background: var(--light-blue);
}

.btn-small {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

/* === HERO SECTION with Gentle Flow === */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    color: white;
    padding: 120px 20px 100px;
    text-align: center;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Jemné vlnky uprostřed - jako tekoucí řeka */
.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 100%;
    background: 
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,165.3C384,171,480,149,576,133.3C672,117,768,107,864,122.7C960,139,1056,181,1152,181.3C1248,181,1344,139,1392,117.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>'),
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.03" d="M0,128L48,144C96,160,192,192,288,186.7C384,181,480,139,576,128C672,117,768,139,864,154.7C960,171,1056,181,1152,170.7C1248,160,1344,128,1392,112L1440,96L1440,0L1392,0C1344,0,1248,0,1152,0C1056,0,960,0,864,0C768,0,672,0,576,0C480,0,384,0,288,0C192,0,96,0,48,0L0,0Z"></path></svg>');
    background-repeat: repeat-x;
    background-position: center center;
    background-size: 150% auto;
    opacity: 0.8;
    animation: gentleFlow 40s linear infinite;
    pointer-events: none;
}

/* Druhá vrstva - opačný směr, pomalejší */
.hero::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 100%;
    background: 
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.04" d="M0,160L48,170.7C96,181,192,203,288,197.3C384,192,480,160,576,149.3C672,139,768,149,864,170.7C960,192,1056,224,1152,213.3C1248,203,1344,149,1392,122.7L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-repeat: repeat-x;
    background-position: center center;
    background-size: 140% auto;
    opacity: 0.6;
    animation: gentleFlowReverse 50s linear infinite;
    pointer-events: none;
}

/* Velmi pomalá, jemná animace */
@keyframes gentleFlow {
    0% { 
        background-position: 0% center;
    }
    100% { 
        background-position: 100% center;
    }
}

@keyframes gentleFlowReverse {
    0% { 
        background-position: 100% center;
    }
    100% { 
        background-position: 0% center;
    }
}

/* Hero Content */
.hero-content {
    position: relative;
    z-index: 10;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-logo {
    max-width: 500px;  /* Zvětšeno z 450px */
    width: 100%;
    height: auto;
    margin: 0 auto 30px;  /* Menší margin dole */
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
    animation: fadeInUp 0.8s ease;
}

/* Popisek pod logem - menší, elegantní */
.hero-subtitle {
    font-size: var(--font-size-lg);  /* 18px */
    font-weight: var(--font-weight-normal);  /* 400 */
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-2xl);  /* 40px */
    animation: fadeInUp 0.8s ease 0.2s both;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.3px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* === NAVIGATION === */
.navbar {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    padding: var(--space-md) 0;
    animation: fadeIn 0.5s ease;
}

.nav-container {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-xl);
}

.nav-logo img {
    height: 55px;
    width: auto;
    transition: transform var(--transition-base);
}

.nav-logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    transition: color var(--transition-base);
    position: relative;
    padding: var(--space-sm) 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width var(--transition-base);
}

.nav-links a:hover {
    color: var(--primary-blue);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary-blue);
    color: white !important;
    padding: 10px 25px;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-base);
}

.nav-cta:hover {
    background: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--dark-blue);
    cursor: pointer;
    padding: var(--space-sm);
}

/* === CARDS === */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

/* === COURSE CARD === */
.course-card {
    background: white;
    border: var(--border-width) solid var(--border-gray);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 10px 30px rgba(0, 82, 163, 0.15);
    transform: translateY(-8px);
}

.course-header {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    color: white;
    padding: var(--space-lg);
}

.course-category {
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
    margin-bottom: var(--space-sm);
}

.course-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-xs);
}

.course-type {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* === BADGES === */
.badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    margin-top: var(--space-sm);
}

.badge-popular {
    background: var(--light-blue);
    color: var(--dark-blue);
}

.badge-required {
    background: var(--warning-light);
    color: #856404;
}

.badge-accredited {
    background: var(--success-light);
    color: #155724;
}

/* === MODAL === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: var(--z-modal-backdrop);
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    animation: fadeIn var(--transition-base);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp var(--transition-base);
}

.modal-header {
    padding: var(--space-xl);
    border-bottom: 2px solid var(--light-blue);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: var(--font-size-3xl);
    color: var(--dark-blue);
}

.modal-close {
    font-size: 28px;
    color: var(--text-medium);
    cursor: pointer;
    background: none;
    border: none;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    background: var(--bg-gray);
    color: var(--text-dark);
}

/* === RESPONSIVE === */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 80px 20px 60px;
        min-height: 500px;
    }
    
    /* Upraveno - už není h1 */
    .hero-subtitle {
        font-size: var(--font-size-base);  /* 15px na mobilu */
    }
    
    .hero-logo {
        max-width: 320px;  /* O něco větší na mobilu */
    }
}

/* === FORM COMPONENTS (for reservation) === */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    color: var(--text-dark);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-base);
}

.required {
    color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-base);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 82, 163, 0.1);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}