:root {
    /* Theme Colors */
    --primary-red: #D42426;
    --primary-green: #165B33;
    --accent-gold: #F0B51D;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --text-dark: #333333;
    --text-light: #666666;
    --white: #ffffff;
    
    /* Spacing */
    --container-padding: 20px;
    --header-height: 70px;
}

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

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    padding-top: var(--header-height);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: var(--header-height);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-red);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    transition: color 0.3s;
    color: var(--text-dark);
}

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

/* Mobile Menu */
.hamburger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* Hero Section */
.hero {
    background: url('../images/BG\ 16X9.jpg');
    background-color: var(--primary-green); /* Fallback */
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
    padding: 100px 20px;
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero-content {
    background-color: rgba(255, 255, 255, 0.3);
    padding: 40px;
    border-radius: 15px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    max-width: 900px;
    width: 100%;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    /* 外層立體感陰影 */
    text-shadow:
        3px 3px 0px #fff,
        3px 3px 0px #fff,
        3px 3px 0px #fff,
        3px 3px 0px #fff;
    color: #e43280;
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    /* 外層立體感陰影 */
    text-shadow: 3px 3px 0px #fff,
        3px 3px 0px #fff,
        3px 3px 0px #fff,
        3px 3px 0px #fff;
    color: #e43280;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    max-width: 800px;
    /* 外層立體感陰影 */
    text-shadow:
        3px 3px 0px #fff,
        3px 3px 0px #fff,
        3px 3px 0px #fff,
        3px 3px 0px #fff;
    color: #e43280;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.2s, background-color 0.2s;
    cursor: pointer;
    border: none;
    text-align: center;
}

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

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

.btn-gold {
    background-color: var(--accent-gold);
    color: var(--text-dark);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* Sections */
.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-green);
    margin-bottom: 50px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-red);
}

/* Cards Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.card-link {
    display: block;
    width: 100%;
    color: inherit;
    text-decoration: none;
}

/* Jumping Animation */
@keyframes jump {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.card:hover {
    animation: jump 1s ease-in-out infinite;
}

/* Auto-cycling highlight */
.grid.auto-cycle .card-link {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.grid.auto-cycle .card-link.auto-highlight .card-content {
    animation: jump 1s ease-in-out;
    box-shadow: 0 15px 25px rgba(0,0,0,0.25);
}

.grid.auto-cycle .card-link.auto-highlight {
    transform: translateY(-4px);
    z-index: 1;
}

.card-content {
    padding: 25px;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--primary-green);
    font-weight: bold;
    border-bottom: 2px solid var(--primary-green);
    padding-bottom: 8px;
    display: inline-block;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: var(--white);
    padding: 50px 0 20px;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.social-links a {
    font-size: 1.5rem;
    color: var(--white);
}

.performer-section {
    width: 100px;
    aspect-ratio: 1 / 1;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 15px;
    border: 3px solid var(--accent-gold);
}

.performer-section img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.performer-day {
    border: 1px solid #e2e2e2;
    border-radius: 18px;
    padding: 0 20px 20px;
    background-color: var(--white);
    margin-bottom: 40px;
}

.performer-day:last-of-type {
    margin-bottom: 0;
}

.performer-day-summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 0;
    cursor: pointer;
    font-weight: 700;
    color: var(--primary-green);
}

.performer-day summary::-webkit-details-marker {
    display: none;
}

.performer-day-label {
    background: var(--primary-green);
    color: var(--white);
    padding: 6px 18px;
    border-radius: 999px;
    font-size: 1rem;
}

.performer-day-summary i {
    color: var(--primary-green);
    transition: transform 0.3s ease;
}

.performer-day[open] .performer-day-summary i {
    transform: rotate(180deg);
}

.performer-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.stage-hero-card {
    padding: 0;
    aspect-ratio: 1 / 1;
    width: 100%;
    background: linear-gradient(rgba(0,0,0,0.25), rgba(0,0,0,0.25)), url('../images/acg.stage.hk.jpg');
    background-size: cover;
    background-position: center;
}

.random-dance-card {
    padding: 0;
    aspect-ratio: 1 / 1;
    width: 100%;
    background: linear-gradient(rgba(0,0,0,0.25), rgba(0,0,0,0.25)), url('../images/dr_randomdance_acg.jpg');
    background-size: cover;
    background-position: center;
}

.copyright {
    color: #888;
    font-size: 0.9rem;
    border-top: 1px solid #444;
    padding-top: 20px;
    margin-top: 20px;
}

/* Performer Tabs & Collapsible Section */
.performer-section-wrapper {
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    margin-top: 30px;
    overflow: hidden;
}

.section-toggle-summary {
    padding: 20px;
    background-color: var(--bg-light);
    cursor: pointer;
    font-weight: bold;
    color: var(--primary-green);
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    font-size: 1.1rem;
    border-bottom: 1px solid #eee;
}

.section-toggle-summary::-webkit-details-marker {
    display: none;
}

.section-toggle-summary i {
    transition: transform 0.3s;
}

.performer-section-wrapper[open] .section-toggle-summary i {
    transform: rotate(180deg);
}

.performer-tabs-container {
    padding: 30px 20px;
}

.tab-nav {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 30px;
    border: 2px solid var(--primary-green);
    background: transparent;
    color: var(--primary-green);
    border-radius: 50px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.tab-btn.active, .tab-btn:hover {
    background: var(--primary-green);
    color: var(--white);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 4px rgba(0,0,0,0.1);
        transform: translateY(-150%);
        transition: transform 0.3s ease-in-out;
    }

    .nav-links.active {
        transform: translateY(0);
    }
    
    .hero {
        background: url('../images/BG\ 9X16.jpg');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }

    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    /* Grid layout for mobile */
    .grid[style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
        gap: 30px;
    }
    
    /* Section titles on mobile */
    .section-title {
        font-size: 2rem;
    }
    
    /* Card content padding on mobile */
    .card-content {
        padding: 20px;
    }
    
    /* Performer grid on mobile */
    .performer-grid {
        grid-template-columns: 1fr !important;
        gap: 15px;
    }
    
    /* Performer card mobile layout - horizontal */
    .performer-grid .card {
        display: grid !important;
        grid-template-columns: 70px 1fr auto !important;
        grid-template-rows: auto auto !important;
        align-items: center !important;
        text-align: left !important;
        padding: 15px !important;
        gap: 12px 15px;
        position: relative;
    }
    
    /* Time slot badge on mobile - top right */
    .performer-grid .card > div:first-child[style*="background: var(--accent-gold)"] {
        position: absolute;
        top: 8px;
        right: 8px;
        width: auto !important;
        font-size: 0.7rem !important;
        padding: 3px 6px !important;
        margin: 0 !important;
        z-index: 1;
        grid-column: 1 / -1;
        justify-self: end;
    }
    
    /* Performer image on mobile - left side, spans both rows */
    .performer-grid .card .performer-section {
        width: 70px !important;
        height: 70px !important;
        min-width: 70px;
        margin: 0 !important;
        grid-row: 1 / 3;
        grid-column: 1;
    }
    
    /* Performer name on mobile - middle, left aligned */
    .performer-grid .card h5 {
        grid-column: 2;
        grid-row: 1;
        margin: 0 !important;
        text-align: left !important;
        font-size: 1rem !important;
        align-self: end;
    }
    
    /* Performer description on mobile - middle, left aligned */
    .performer-grid .card p {
        grid-column: 2;
        grid-row: 2;
        margin: 0 !important;
        text-align: left !important;
        font-size: 0.85rem !important;
        align-self: start;
    }
    
    /* Social link on mobile - right side, spans both rows */
    .performer-grid .card > a[target="_blank"] {
        grid-column: 3;
        grid-row: 1 / 3;
        align-self: center;
        margin: 0 !important;
        font-size: 1.3rem !important;
    }
    
    /* Section header cards - keep full width and centered */
    .performer-grid .card[style*="grid-column: 1 / -1"] {
        display: block !important;
        text-align: center !important;
        grid-template-columns: 1fr !important;
    }
    
    /* Hide time badge for section headers */
    .performer-grid .card[style*="grid-column: 1 / -1"] > div[style*="background: var(--accent-gold)"] {
        display: none;
    }
    
    /* Tab navigation on mobile */
    .tab-nav {
        flex-direction: column;
        gap: 10px;
    }
    
    .tab-btn {
        width: 100%;
        padding: 12px 20px;
    }
    
    /* Hero buttons on mobile */
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    /* ttm.winds section mobile optimization */
    .section .grid > div:last-child img {
        max-width: 100%;
        margin: 0 auto;
    }
    
    /* Notice section mobile */
    .notice-section {
        padding: 25px 20px;
    }
    
    .notice-section h2 {
        font-size: 1.5rem;
        flex-wrap: wrap;
    }
    
    .notice-section h3 {
        font-size: 1.1rem;
    }
    
    /* Copyright mobile */
    .copyright p {
        font-size: 0.85rem;
        margin: 5px 0;
    }
    
    /* Section padding mobile */
    .section {
        padding: 40px 0;
    }
}

/* Recruitment Popup */
.popup-overlay {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background-color: transparent;
    display: none; /* Hidden by default */
    z-index: 10000;
}

.popup-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    position: relative;
    width: 320px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    animation: popupSlideUp 0.5s ease-out;
    border-left: 5px solid var(--primary-red);
    border-top: none;
}

.close-popup {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
    transition: color 0.3s;
    line-height: 1;
}

.close-popup:hover {
    color: var(--primary-red);
}

.popup-buttons {
    display: flex;
    flex-direction: row;
    gap: 10px;
    margin-top: 15px;
}

.popup-buttons .btn {
    flex: 1;
    padding: 8px 0;
    font-size: 0.9rem;
}

.popup-buttons .btn-secondary {
    border: 2px solid var(--primary-red);
    background-color: transparent;
    color: var(--primary-red);
}

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

.popup-visible {
    display: block;
}

@media (max-width: 768px) {
    .popup-overlay {
        bottom: 16px;
        left: 50%;
        transform: translateX(-50%);
    }
}

@keyframes popupSlideUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Photo Gallery */
.photo-gallery-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.photo-gallery {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 20px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-red) var(--bg-light);
}

.photo-gallery::-webkit-scrollbar {
    height: 8px;
}

.photo-gallery::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 10px;
}

.photo-gallery::-webkit-scrollbar-thumb {
    background: var(--primary-red);
    border-radius: 10px;
}

.photo-gallery::-webkit-scrollbar-thumb:hover {
    background: var(--primary-green);
}

.photo-item {
    flex: 0 0 300px;
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.photo-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.photo-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.photo-caption {
    padding: 15px;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-dark);
    font-weight: 500;
    background: var(--white);
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-red);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    z-index: 10;
}

.gallery-nav:hover {
    background: var(--primary-red);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.gallery-nav-left {
    left: 10px;
}

.gallery-nav-right {
    right: 10px;
}

@media (max-width: 768px) {
    .photo-item {
        flex: 0 0 250px;
    }
    
    .photo-item img {
        height: 180px;
    }
    
    .gallery-nav {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}