:root {
    --primary: #4ab1ce; /* Ocean Blue */
    --secondary: #f4a261; /* Coral/Sun */
    --accent: #e9c46a; /* Sunny Yellow */
    --text-dark: #264653;
    --text-light: #ffffff;
    --bg-color: #f0f8ff;
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
}

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

body {
    font-family: 'Noto Sans TC', 'Nunito', sans-serif;
    color: var(--text-dark);
    background: linear-gradient(135deg, #e0f7fa 0%, #ffffff 100%);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background animation bubbles */
.background-animation {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    background: radial-gradient(circle at 15% 50%, rgba(74, 177, 206, 0.08), transparent 25%),
                radial-gradient(circle at 85% 30%, rgba(244, 162, 97, 0.08), transparent 25%);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 0 20px;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; width: 100%; height: 200px;
    background: linear-gradient(to top, var(--bg-color), transparent);
    z-index: -1;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
    color: var(--primary);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.05);
}

.hero-content h1 .highlight {
    color: var(--secondary);
    display: inline-block;
}

.hero-content p {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-dark);
    opacity: 0.8;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: bounce 2s infinite;
    color: var(--primary);
    font-weight: 700;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-15px) translateX(-50%); }
    60% { transform: translateY(-7px) translateX(-50%); }
}

/* Main Container */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Day Toggle */
.day-toggle-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
    position: sticky;
    top: 20px;
    z-index: 100;
}

.day-toggle {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    padding: 5px;
    display: inline-flex;
    box-shadow: var(--glass-shadow);
}

.toggle-btn {
    padding: 12px 30px;
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    cursor: pointer;
    border-radius: 40px;
    transition: all 0.3s ease;
    opacity: 0.6;
}

.toggle-btn.active {
    background: var(--primary);
    color: white;
    opacity: 1;
    box-shadow: 0 4px 15px rgba(74, 177, 206, 0.4);
}

/* Sections */
.itinerary-section {
    display: none;
    opacity: 0;
}

.itinerary-section.active {
    display: block;
    animation: fadeIn 0.5s forwards;
}

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

/* Section Title */
.section-title {
    text-align: center;
    color: var(--primary);
    margin: 40px 0 20px;
    font-size: 1.8rem;
    font-weight: 800;
}

/* Roster Section */
.roster-section {
    margin-bottom: 50px;
}
.roster-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.roster-card h3 {
    color: var(--secondary);
    border-bottom: 2px dashed rgba(42, 157, 143, 0.3);
    padding-bottom: 10px;
    margin-bottom: 20px;
}
.roster-list {
    list-style: none;
    line-height: 2;
}
.roster-list li {
    font-size: 1.1rem;
}
.roster-list i {
    color: var(--primary);
    width: 25px;
}
.room-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.room {
    background: rgba(255,255,255, 0.5);
    padding: 15px;
    border-radius: 12px;
    border-left: 5px solid var(--accent);
}
.room h4 {
    color: var(--primary);
    margin-bottom: 5px;
}
.room p {
    margin: 0;
    font-size: 1.05rem;
    color: #444;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 170px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
    position: relative;
    align-items: flex-start;
}

.timeline-item .time {
    width: 150px;
    padding-right: 20px;
    text-align: right;
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 15px;
}

.timeline-item .icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, #2a9d8f 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    z-index: 1;
    position: absolute;
    left: 147px; /* 170px - 25px + 2px border offset */
    top: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    border: 4px solid var(--bg-color);
}

.timeline-item.highlight-event .icon {
    background: linear-gradient(135deg, var(--secondary) 0%, #e76f51 100%);
    transform: scale(1.1);
}

.timeline-item .content {
    margin-left: 60px; /* Starts slightly after the icon */
    flex-grow: 1;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.12);
}

.glass-card h3 {
    margin-bottom: 10px;
    font-size: 1.4rem;
    color: var(--text-dark);
}

.transport-tag {
    display: inline-block;
    background: rgba(74, 177, 206, 0.1);
    color: var(--primary);
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 15px;
}

/* Qijin Card Special Styling */
.qijin-card {
    border: 2px solid var(--secondary);
    background: rgba(255, 255, 255, 0.75);
}

.qijin-card h3 {
    color: #e76f51;
}

.qijin-route {
    list-style: none;
    margin-top: 15px;
}

.qijin-route li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.6);
    padding: 10px;
    border-radius: 10px;
}

.qijin-route li span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 25px;
    height: 25px;
    background: var(--secondary);
    color: white;
    border-radius: 50%;
    margin-right: 12px;
    font-size: 0.85rem;
    font-weight: bold;
}

/* Map Section */
.section-title {
    text-align: center;
    font-size: 2rem;
    margin: 60px 0 30px;
    color: var(--primary);
}

.map-container {
    padding: 15px;
}

#itinerary-map {
    width: 100%;
    height: 450px;
    border-radius: 15px;
    z-index: 1; 
}

.map-caption {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 15px;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px;
    background: rgba(255,255,255,0.5);
    margin-top: 50px;
    font-weight: 700;
    color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 { font-size: 2.2rem; }
    .hero-content p { font-size: 1.1rem; }
    
    .timeline::before { left: 30px; }
    
    .timeline-item { flex-direction: column; cursor: pointer; }
    
    .timeline-item .time {
        width: 100%;
        text-align: left;
        padding-left: 70px;
        margin-top: 5px;
        margin-bottom: 5px;
    }
    
    .timeline-item .icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        left: 10px;
        top: 0;
    }
    
    .timeline-item .content {
        margin-left: 70px;
        width: calc(100% - 70px);
        padding: 15px;
    }
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: rgba(255, 255, 255, 0.95);
    width: 90%;
    max-width: 600px;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    transform: translateY(30px);
    transition: all 0.3s ease;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 15px; right: 20px;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
    background: none; border: none;
}

#modal-map {
    width: 100%;
    height: 250px;
    border-radius: 10px;
    margin-top: 15px;
    background: #e0e0e0;
}

.timeline-item {
    cursor: pointer;
    transition: transform 0.2s;
}
.timeline-item:hover .icon {
    transform: scale(1.1);
}