/* ========================================
   CSS Reset & Base Styles
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Minimal & Clean */
    --white: #ffffff;
    --off-white: #fafafa;
    --light-gray: #f5f5f5;
    --gray: #e0e0e0;
    --medium-gray: #9e9e9e;
    --dark-gray: #616161;
    --text-primary: #333333;
    --text-secondary: #666666;
    --accent-green: #5a8f4a;
    --accent-green-hover: #4a7a3a;
    --border-color: #e8e8e8;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.08);

    /* Typography */
    --font-family: 'Raleway', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 40px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --spacing-3xl: 96px;

    /* Layout */
    --container-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--white);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Floating Zoom Button
   ======================================== */

.floating-zoom-btn {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-hover) 100%);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(90, 143, 74, 0.4);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    cursor: pointer;
    animation: floatingPulse 2s ease-in-out infinite;
}

.floating-zoom-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(90, 143, 74, 0.5);
    background: linear-gradient(135deg, var(--accent-green-hover) 0%, #3a5f2a 100%);
}

.floating-zoom-btn:active {
    transform: translateY(-2px);
}

.zoom-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.btn-text {
    white-space: nowrap;
}

@keyframes floatingPulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(90, 143, 74, 0.4);
    }
    50% {
        box-shadow: 0 4px 30px rgba(90, 143, 74, 0.6);
    }
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .floating-zoom-btn {
        bottom: 20px;
        right: 20px;
        padding: 14px 20px;
        font-size: var(--font-size-sm);
    }

    .zoom-icon {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 480px) {
    .floating-zoom-btn {
        bottom: 16px;
        right: 16px;
        padding: 12px 18px;
        gap: 8px;
    }

    .btn-text {
        font-size: 14px;
    }
}

/* Accessibility: Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .floating-zoom-btn {
        animation: none;
    }
}

/* ========================================
   Loading Screen
   ======================================== */

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--light-gray);
    border-top-color: var(--accent-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ========================================
   Container & Layout
   ======================================== */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Header
   ======================================== */

.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.header-content {
    animation: fadeInDown 0.6s ease;
}

.site-title {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.5px;
}

.site-tagline {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 300;
}

/* ========================================
   Hero Section
   ======================================== */

.hero-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #ffffff 100%);
    padding: var(--spacing-2xl) 0;
    animation: fadeIn 0.8s ease;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-image {
    text-align: center;
}

.founder-photo {
    width: 100%;
    max-width: 280px;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-md);
}

.founder-caption {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.4;
}

.founder-caption span {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-text h2 {
    font-size: var(--font-size-2xl);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.hero-text h3 {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.hero-text p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-md);
}

.benefits-list li {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.benefits-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: bold;
    font-size: 18px;
}

/* ========================================
   Quick Links Section
   ======================================== */

.quick-links-section {
    background-color: var(--off-white);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 400;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.quick-link-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-decoration: none;
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.quick-link-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-green);
}

.link-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.quick-link-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.quick-link-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Social Media Links */
.social-links {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.social-links p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--white);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    transition: var(--transition);
    text-decoration: none;
}

.social-icon:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.social-icon.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
    border-color: transparent;
}

.social-icon.facebook:hover {
    background-color: #1877f2;
    color: white;
    border-color: transparent;
}

/* ========================================
   Schedule Information Section
   ======================================== */

.schedule-info-section {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(to bottom, #ffffff 0%, #f9fafb 100%);
}

.schedule-intro {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.schedule-intro h2 {
    font-size: var(--font-size-2xl);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.intro-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.schedule-pattern {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.schedule-pattern h3 {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.schedule-times {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.schedule-time-block {
    background-color: var(--off-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
}

.time-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.time-badge.evening {
    background-color: #e3f2fd;
    color: #1565c0;
}

.time-badge.weekend {
    background-color: #f3e5f5;
    color: #6a1b9a;
}

.time-badge.morning {
    background-color: #fff3e0;
    color: #e65100;
}

.time-info {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    line-height: 1.8;
}

.time-info strong {
    color: var(--text-primary);
    font-weight: 600;
}

.time-zones {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

.session-types {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-xl);
}

.session-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.session-type-card {
    background-color: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

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

.session-type-card.beginner {
    border-left: 4px solid #1565c0;
}

.session-type-card.intermediate {
    border-left: 4px solid #6a1b9a;
}

.session-type-card.morning {
    border-left: 4px solid #e65100;
}

.session-type-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.session-type-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-xs);
}

.session-type-card p:last-child {
    margin-bottom: 0;
}

/* ========================================
   Filter Section
   ======================================== */

.filter-section {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--off-white);
    animation: fadeIn 1s ease;
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
    justify-content: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.filter-group label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-select {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--white);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.filter-select:hover,
.filter-select:focus {
    border-color: var(--accent-green);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.filter-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-green);
}

.search-input {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--white);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    width: 280px;
    outline: none;
    transition: var(--transition);
}

.search-input:hover,
.search-input:focus {
    border-color: var(--accent-green);
}

.search-input::placeholder {
    color: var(--medium-gray);
}

/* ========================================
   Sessions Section
   ======================================== */

.sessions-section {
    padding: var(--spacing-2xl) 0;
    min-height: 400px;
}

.sessions-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* Day Group */
.day-group {
    animation: fadeInUp 0.5s ease;
}

.day-header {
    font-size: var(--font-size-xl);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
}

.sessions-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.sessions-list-full {
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

/* Session Card */
.session-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.session-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--accent-green);
    transform: scaleY(0);
    transition: var(--transition);
}

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

.session-card:hover::before {
    transform: scaleY(1);
}

.session-card.past-session {
    opacity: 0.6;
    background-color: var(--off-white);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.session-date-time {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.session-date {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
}

.session-time {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.session-focus {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--light-gray);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
    text-transform: capitalize;
}

.session-focus.morning {
    background-color: #fff3e0;
    color: #e65100;
}

.session-focus.beginner {
    background-color: #e3f2fd;
    color: #1565c0;
}

.session-focus.intermediate {
    background-color: #f3e5f5;
    color: #6a1b9a;
}

.session-body {
    margin-bottom: var(--spacing-sm);
}

.session-topic {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.session-host {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.session-host strong {
    color: var(--text-primary);
    font-weight: 500;
}

.session-footer {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-green-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.btn-secondary:hover {
    background-color: var(--accent-green);
    color: var(--white);
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--text-secondary);
}

.no-results p {
    font-size: var(--font-size-lg);
}

/* ========================================
   Info Section
   ======================================== */

.info-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--off-white);
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

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

.info-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

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

.info-list {
    list-style: none;
    padding: 0;
}

.info-list li {
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.info-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-size: 20px;
    line-height: 1.2;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.footer-disclosure {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--off-white);
    border-radius: var(--border-radius);
}

.footer-disclosure strong {
    color: var(--text-primary);
    font-weight: 600;
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--medium-gray);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 32px;
        --font-size-2xl: 24px;
        --font-size-xl: 20px;
        --spacing-xl: 32px;
        --spacing-2xl: 48px;
    }

    .header {
        padding: var(--spacing-lg) 0;
    }

    .hero-section {
        padding: var(--spacing-xl) 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .founder-photo {
        max-width: 200px;
    }

    .hero-text h2 {
        font-size: var(--font-size-xl);
    }

    .hero-text h3 {
        font-size: var(--font-size-lg);
    }

    .hero-text p {
        font-size: var(--font-size-base);
    }

    .quick-links-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: var(--font-size-xl);
    }

    .schedule-info-section {
        padding: var(--spacing-xl) 0;
    }

    .schedule-intro h2 {
        font-size: var(--font-size-xl);
    }

    .intro-text {
        font-size: var(--font-size-base);
    }

    .schedule-pattern {
        padding: var(--spacing-md);
    }

    .schedule-times {
        grid-template-columns: 1fr;
    }

    .session-type-grid {
        grid-template-columns: 1fr;
    }

    .filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }

    .filter-select {
        width: 100%;
    }

    .search-input {
        width: 100%;
    }

    .sessions-list {
        grid-template-columns: 1fr;
    }

    .info-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-3xl: 28px;
        --font-size-2xl: 22px;
        --spacing-md: 16px;
        --spacing-lg: 24px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .session-card {
        padding: var(--spacing-sm);
    }

    .session-header {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .filter-section,
    .loading,
    .btn {
        display: none;
    }

    .session-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}