:root {
    /* --- COLORS (Monochrome Sci-fi Palette) --- */
    --color-background: #000000; /* Pure Black */
    --color-surface: rgba(20, 20, 20, 0.8);
    --color-border: rgba(255, 255, 255, 0.15);
    --color-primary-text: #f5f5f5; /* Soft White */
    --color-secondary-text: #888888;
    --color-accent: #ffffff; /* White Glow */
    --color-accent-glow: rgba(255, 255, 255, 0.15);
    --color-danger: #ffffff; /* Changed to white for pure monochrome */
    
    /* --- FONTS --- */
    --font-primary: 'Kanit', sans-serif;
    --font-display: 'Orbitron', sans-serif;

    /* --- LAYOUT & EFFECTS --- */
    --container-max-width: 1100px;
    --border-radius: 12px;
    --card-min-height: 95px;
    --backdrop-blur: 10px;
    --perspective: 1000px;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-background);
    color: var(--color-primary-text);
    /* Updated background gradient to monochrome */
    background-image:
        radial-gradient(circle at 15% 50%, rgba(255, 255, 255, 0.03), transparent 30%),
        radial-gradient(circle at 85% 30%, rgba(255, 255, 255, 0.05), transparent 40%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

@keyframes flicker {
    0%, 18%, 22%, 25%, 53%, 57%, 100% {
        text-shadow: 0 0 4px var(--color-accent-glow), 0 0 10px var(--color-accent-glow), 0 0 20px var(--color-accent);
    }
    20%, 24%, 55% {
        text-shadow: none;
    }
}

/* --- LANDING PAGE --- */
#landing-page {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
    animation: fadeIn 1.5s ease-out;
    perspective: var(--perspective);
}

#landing-page .logo {
    max-width: 220px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px var(--color-accent-glow));
    transform: scale(1.5) translateY(80px);
    transform-origin: center bottom;
}

#landing-page h1 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 500;
    letter-spacing: 5px;
    text-transform: uppercase;
    color: var(--color-primary-text);
    margin-bottom: 40px;
    animation: flicker 4s infinite linear;
}

#landing-page .enter-button {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    padding: 14px 35px;
    border-radius: 5px;
    font-family: var(--font-display);
    font-size: 16px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-shadow: 0 0 5px var(--color-accent-glow);
    box-shadow: inset 0 0 10px var(--color-accent-glow);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

#landing-page .enter-button:hover {
    background-color: var(--color-accent);
    color: var(--color-background);
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--color-accent), 0 0 30px var(--color-accent-glow);
}

.button-container {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* --- MEMBERS PAGE --- */
#members-page {
    display: none;
    padding: 20px;
    perspective: var(--perspective);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 20px;
}

/* เพิ่มพื้นที่ด้านล่างของหน้า members-page เพื่อไม่ให้ footer ทับเนื้อหา */
#members-page .container {
    padding-bottom: 80px; /* ควรมีค่ามากกว่าความสูงของ footer */
}

header {
    text-align: center;
    margin-bottom: 50px;
    position: relative; /* เพิ่มเพื่อให้สามารถกำหนดตำแหน่งของปุ่มได้ */
}

header .logo {
    max-width: 180px;
    opacity: 0.8;
    transform: scale(1.5) translateY(10px);
}

.search-container {
    position: relative;
    margin-bottom: 50px;
}

.search-icon {
    position: absolute;
    top: 50%;
    left: 15px;
    transform: translateY(-50%);
    color: var(--color-secondary-text);
    font-size: 14px;
}

#searchInput {
    width: 100%;
    padding: 15px 20px 15px 45px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    backdrop-filter: blur(var(--backdrop-blur));
    color: var(--color-primary-text);
    font-size: 16px;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

#searchInput:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 15px var(--color-accent-glow);
}

.member-section {
    margin-bottom: 30px;
    display: grid;
    gap: 12px;
}

.member-section h2 {
    grid-column: 1 / -1;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 10px;
    text-shadow: 0 0 10px var(--color-accent-glow);
}

/* --- 3D CARD DESIGN --- */
.member-card {
    display: flex;
    align-items: center;
    background-color: var(--color-surface);
    backdrop-filter: blur(var(--backdrop-blur));
    padding: 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    min-height: auto;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
    transform-style: preserve-3d;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.member-card:hover {
    transform: translateY(-5px) rotateX(5deg) scale(1.02);
    box-shadow: 0 0 20px var(--color-accent-glow), 0 10px 30px rgba(0,0,0,0.3);
    border-color: var(--color-accent);
}

.leader-card {
    border-left: 3px solid var(--color-accent);
    box-shadow: inset 5px 0 15px -5px var(--color-accent-glow), 0 5px 15px rgba(0,0,0,0.2);
}

.member-card .profile-pic {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
    border: 2px solid var(--color-border);
    transition: all 0.3s ease;
    transform: translateZ(20px);
}

.member-card:hover .profile-pic {
    border-color: var(--color-accent);
    transform: translateZ(20px) scale(1.1);
}

.member-card .member-info {
    flex-grow: 1;
    min-width: 0;
    transform: translateZ(10px);
}

.member-card .member-info h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-primary-text);
    margin: 0 0 2px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.member-card .member-info a {
    font-size: 13px;
    color: var(--color-secondary-text);
    text-decoration: none;
    transition: color 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.member-card .member-info a:hover {
    color: var(--color-accent);
}

.member-card .profile-link {
    font-size: 22px;
    color: var(--color-secondary-text);
    transition: all 0.2s ease;
    transform: translateZ(20px);
}

.member-card .profile-link:hover {
    color: var(--color-danger);
    transform: translateZ(20px) scale(1.2);
}

/* --- PAGINATION --- */
.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
}

.pagination-controls button {
    background-color: var(--color-surface);
    color: var(--color-primary-text);
    border: 1px solid var(--color-border);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
}

.pagination-controls button:hover:not(:disabled) {
    background-color: var(--color-accent);
    color: var(--color-background);
    box-shadow: 0 0 10px var(--color-accent);
}

.pagination-controls button:disabled {
    cursor: not-allowed;
    opacity: 0.3;
}

.pagination-controls #pageInfo {
    margin: 0 20px;
    font-size: 16px;
    font-family: var(--font-display);
    color: var(--color-secondary-text);
}


/* --- FOOTER & AUDIO PLAYER --- */
footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: var(--color-background);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 25px;
    border-top: 1px solid var(--color-border);
}

#audio-player-container {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    padding: 5px 15px;
    box-shadow: 0 0 15px rgba(0,0,0,0.3);
}

footer #audio-player-container p {
    margin: 0;
    margin-left: 15px;
    padding-left: 15px;
    border-left: 1px solid var(--color-border);
    font-size: 13px;
    color: var(--color-secondary-text);
}

.audio-btn {
    background: none;
    border: none;
    color: var(--color-secondary-text);
    font-size: 16px;
    cursor: pointer;
    transition: color 0.2s ease;
    padding: 5px;
}
.audio-btn:hover { color: var(--color-accent); }

.volume-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

#volume-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 70px;
    height: 4px;
    background: var(--color-border);
    outline: none;
    border-radius: 3px;
    transition: all 0.2s;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 14px; height: 14px;
    background: var(--color-primary-text);
    cursor: pointer;
    border-radius: 50%;
    transition: background-color 0.2s, box-shadow 0.2s;
}

#volume-slider:hover::-webkit-slider-thumb {
    background-color: var(--color-accent);
    box-shadow: 0 0 10px var(--color-accent-glow);
}

/* New CSS for Back Button */
.back-button {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    padding: 10px 20px;
    border-radius: 5px;
    font-family: var(--font-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    position: absolute;
    left: 20px;
    top: 20px;
}

.back-button:hover {
    background-color: var(--color-accent);
    color: var(--color-background);
    transform: scale(1.05);
    box-shadow: 0 0 10px var(--color-accent-glow);
}

@media (max-width: 600px) {
    .member-section {
        grid-template-columns: 1fr !important;
    }
    .container { padding: 10px; }
    .back-button {
        position: static;
        margin-bottom: 20px;
    }
}