/* Reset a základní styly */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #e8b4b8;
    --accent-color: #d4a5a5;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Page transitions */
.page {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: 1px;
    cursor: pointer;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    cursor: pointer;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
}

.nav-links .cta-nav {
    background: var(--secondary-color);
    color: var(--white) !important;
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
}

.nav-links .cta-nav:hover,
.nav-links .cta-nav.active {
    background: var(--accent-color);
    color: var(--white) !important;
}

/* Social Icons */
.social-icons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    transition: all 0.3s;
    color: var(--text-dark);
}

.social-icon:hover {
    transform: translateY(-2px);
}

.social-icon.facebook:hover {
    color: #1877F2;
}

.social-icon.instagram:hover {
    color: #E4405F;
}

.social-icon svg {
    width: 20px;
    height: 20px;
}

/* Mobilní ikony a hamburger menu */
.mobile-icons {
    display: none;
    align-items: center;
    gap: 1rem;
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger span {
    width: 30px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
}

/* Mobilní navigace overlay */
.nav-links.mobile-open {
    display: flex;
}

/* Hero Section s Video pozadím */
.hero {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: 0;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(232, 180, 184, 0.75) 0%, rgba(212, 165, 165, 0.7) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--white);
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.3rem;
    color: var(--white);
    margin: 0 auto 2rem;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
}

/* Buttons */
.cta-button {
    display: inline-block;
    background: var(--white);
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.cta-button.secondary {
    background: var(--secondary-color);
    color: var(--white);
}

.cta-button.secondary:hover {
    background: var(--accent-color);
}

/* Section Styling */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 700px;
    margin: -2rem auto 3rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Pricing Cards */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
    border: 2px solid transparent;
}

.pricing-card:hover,
.pricing-card.featured {
    border-color: var(--secondary-color);
    transform: scale(1.05);
}

.pricing-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin: 1rem 0;
}

.pricing-card ul {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.pricing-card ul li {
    padding: 0.5rem 0;
    color: var(--text-dark);
}

.pricing-card ul li:before {
    content: "✓ ";
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
}

.testimonial-card p {
    font-style: italic;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.testimonial-author {
    font-weight: 600;
    color: var(--primary-color);
}

/* Calendar/Reservation */
.reservation-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 3rem;
    border-radius: var(--border-radius);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Footer */
footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

/* Lektoři */
.lektori-grid {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin-top: 3rem;
}

.lektor-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

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

.lektor-image {
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.lektor-avatar {
    font-size: 8rem;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
    width: 180px;
    height: 180px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(232, 180, 184, 0.3);
}

.lektor-content h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.lektor-role {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.lektor-description {
    margin-bottom: 2rem;
}

.lektor-description p {
    color: var(--text-dark);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.lektor-specialties {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.lektor-specialties h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.lektor-specialties ul {
    list-style: none;
    padding: 0;
}

.lektor-specialties li {
    padding: 0.5rem 0;
    color: var(--text-dark);
}

.lektor-quote {
    background: linear-gradient(135deg, rgba(232, 180, 184, 0.1) 0%, rgba(212, 165, 165, 0.05) 100%);
    padding: 1.5rem;
    border-left: 4px solid var(--secondary-color);
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

.lektor-quote p {
    color: var(--text-dark);
    font-style: italic;
    margin: 0;
}

/* Rezervační systém */
.reservation-system {
    max-width: 900px;
    margin: 0 auto;
}

.reservation-step {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.reservation-step.active {
    display: block;
}

.step-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

/* Výběr lektora */
.lecturer-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.lecturer-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
    border: 3px solid transparent;
}

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

.lecturer-card.selected {
    border-color: var(--secondary-color);
    background: linear-gradient(135deg, rgba(232, 180, 184, 0.1) 0%, rgba(212, 165, 165, 0.05) 100%);
}

.lecturer-avatar {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.lecturer-card h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.lecturer-card p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.lecturer-specialty {
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: 1.5rem !important;
}

/* Kalendář */
.calendar-container {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.calendar-header h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.calendar-nav {
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s;
}

.calendar-nav:hover {
    background: var(--accent-color);
    transform: scale(1.1);
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.day-header {
    text-align: center;
    font-weight: 600;
    color: var(--text-dark);
    padding: 0.5rem;
}

.calendar-dates {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.calendar-date {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.calendar-date.empty {
    cursor: default;
}

.calendar-date.past {
    color: #ccc;
    cursor: not-allowed;
}

.calendar-date.unavailable {
    background: #f0f0f0;
    color: #999;
    text-decoration: line-through;
    cursor: not-allowed;
}

.calendar-date.available {
    background: var(--white);
    border: 2px solid #e0e0e0;
}

.calendar-date.available:hover {
    border-color: var(--secondary-color);
    background: rgba(232, 180, 184, 0.1);
    transform: scale(1.05);
}

.calendar-date.selected {
    background: var(--secondary-color);
    color: var(--white);
    border-color: var(--secondary-color);
}

.legend {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.legend-box {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 2px solid #e0e0e0;
}

.legend-box.available {
    background: var(--white);
}

.legend-box.selected {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}

.legend-box.unavailable {
    background: #f0f0f0;
}

/* Časové sloty */
.time-slots {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.time-slot {
    padding: 1rem;
    text-align: center;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.time-slot.available {
    background: var(--white);
    border: 2px solid #e0e0e0;
}

.time-slot.available:hover {
    border-color: var(--secondary-color);
    background: rgba(232, 180, 184, 0.1);
    transform: translateY(-2px);
}

.time-slot.selected {
    background: var(--secondary-color);
    color: var(--white);
    border-color: var(--secondary-color);
}

.time-slot.unavailable {
    background: #f0f0f0;
    color: #999;
    text-decoration: line-through;
    cursor: not-allowed;
}

/* Rezervační formulář */
.reservation-form {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.reservation-summary {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
    margin: 2rem 0;
}

.reservation-summary h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.reservation-summary p {
    margin: 0.5rem 0;
    color: var(--text-dark);
}

.reservation-summary strong {
    color: var(--primary-color);
}

/* Navigace mezi kroky */
.reservation-navigation {
    display: flex;
    justify-content: space-between;
    max-width: 900px;
    margin: 2rem auto;
    gap: 1rem;
}

.reservation-navigation button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 968px) {
    /* Schovej desktop navigaci */
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }

    .nav-links.mobile-open {
        transform: translateX(0);
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        font-size: 1.5rem;
        padding: 1rem;
    }

    .nav-links .social-icons {
        justify-content: center;
        gap: 2rem;
    }

    .nav-links .social-icon {
        width: 50px;
        height: 50px;
    }

    .nav-links .social-icon svg {
        width: 28px;
        height: 28px;
    }

    /* Zobraz mobilní ikony */
    .mobile-icons {
        display: flex;
    }

    /* Hero responsivita */
    .hero {
        height: 500px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    /* Ostatní sekce */
    .section-title {
        font-size: 2rem;
    }

    section {
        padding: 50px 0;
    }

    .features-grid,
    .pricing-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    /* Lektoři - změna na jednosloupcový layout */
    .lektor-card {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }

    .lektor-image {
        justify-content: center;
    }

    .lektor-avatar {
        width: 150px;
        height: 150px;
        font-size: 6rem;
    }

    /* Rezervační systém */
    .lecturer-selection {
        grid-template-columns: 1fr;
    }

    .calendar-container {
        padding: 1.5rem;
    }

    .calendar-dates {
        gap: 0.25rem;
    }

    .calendar-date {
        font-size: 0.9rem;
    }

    .time-slots {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.75rem;
    }

    .time-slot {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .legend {
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }

    .reservation-navigation {
        flex-direction: column;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .reservation-container {
        padding: 2rem 1.5rem;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 400px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .cta-button {
        padding: 0.9rem 2rem;
        font-size: 1rem;
    }

    .container {
        padding: 0 15px;
    }

    .feature-card,
    .pricing-card,
    .testimonial-card {
        padding: 1.5rem;
    }

    .lektor-avatar {
        width: 120px;
        height: 120px;
        font-size: 5rem;
    }

    /* Kalendář na malých obrazovkách */
    .calendar-container {
        padding: 1rem;
    }

    .calendar-header {
        margin-bottom: 1rem;
    }

    .calendar-header h4 {
        font-size: 1.1rem;
    }

    .calendar-nav {
        width: 35px;
        height: 35px;
        font-size: 1.2rem;
    }

    .calendar-date {
        font-size: 0.75rem;
        padding: 0.2rem;
    }

    .day-header {
        font-size: 0.75rem;
        padding: 0.3rem;
    }

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

    .step-title {
        font-size: 1.4rem;
    }

    .lecturer-card {
        padding: 1.5rem;
    }

    .lecturer-avatar {
        font-size: 3rem;
    }

    .lecturer-card h4 {
        font-size: 1.3rem;
    }

    .reservation-summary {
        padding: 1rem;
        font-size: 0.95rem;
    }
}