/* ========================================
   AI Guard Challenge - Modern Dark Theme
   Color Palette: Deep Navy + Cyan/Teal accents
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* === CSS Variables === */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(17, 24, 39, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #f1f5f9;
    --text-secondary: rgba(241, 245, 249, 0.7);
    --text-muted: rgba(241, 245, 249, 0.4);
    --accent-cyan: #06b6d4;
    --accent-cyan-light: #22d3ee;
    --accent-cyan-glow: rgba(6, 182, 212, 0.25);
    --accent-teal: #14b8a6;
    --accent-gold: #f59e0b;
    --accent-gold-light: #fbbf24;
    --accent-rose: #f43f5e;
    --accent-rose-light: #fb7185;
    --accent-emerald: #10b981;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, 0.15);
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(6, 182, 212, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 70%, rgba(20, 184, 166, 0.06), transparent),
        radial-gradient(ellipse 50% 50% at 50% 10%, rgba(245, 158, 11, 0.04), transparent);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* === Header === */
.header {
    text-align: center;
    margin-bottom: 48px;
    padding: 48px 20px 20px;
}

.header h1 {
    font-size: 2.8em;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--accent-cyan-light) 0%, var(--accent-teal) 50%, var(--accent-emerald) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.15em;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.02em;
}

.header-actions {
    margin-top: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Prize Cards === */
.prize-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}

.prize-card {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition-spring);
    position: relative;
    overflow: hidden;
}

.prize-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.prize-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.prize-card:hover::before {
    opacity: 1;
}

.prize-card.grand {
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, var(--bg-glass) 100%);
    border-color: rgba(245, 158, 11, 0.2);
}

.prize-card.grand::before {
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light));
}

.prize-card.grand:hover {
    border-color: rgba(245, 158, 11, 0.35);
    box-shadow: 0 8px 32px rgba(245, 158, 11, 0.1);
}

.prize-card.consolation {
    background: linear-gradient(180deg, rgba(6, 182, 212, 0.06) 0%, var(--bg-glass) 100%);
    border-color: rgba(6, 182, 212, 0.15);
}

.prize-card.consolation::before {
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-teal));
}

.prize-card.consolation:hover {
    border-color: rgba(6, 182, 212, 0.3);
    box-shadow: 0 8px 32px rgba(6, 182, 212, 0.08);
}

.prize-icon {
    font-size: 2.8em;
    margin-bottom: 12px;
}

.prize-title {
    font-size: 1.2em;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.prize-amount {
    font-size: 1.8em;
    font-weight: 900;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.prize-desc {
    color: var(--text-secondary);
    font-size: 0.9em;
    font-weight: 400;
}

/* === Countdown === */
.countdown-section {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 28px;
    text-align: center;
    margin-bottom: 36px;
}

.countdown-label {
    font-size: 0.95em;
    color: var(--text-muted);
    margin-bottom: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.countdown {
    font-size: 1.6em;
    font-weight: 700;
    color: var(--accent-cyan-light);
    letter-spacing: 0.02em;
    font-variant-numeric: tabular-nums;
}

/* === Start Button === */
.start-section {
    text-align: center;
    margin-bottom: 56px;
}

.start-btn {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
    border: none;
    padding: 20px 64px;
    font-size: 1.3em;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 24px var(--accent-cyan-glow);
    transition: all var(--transition-spring);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    font-family: inherit;
}

.start-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.start-btn:hover::before {
    width: 300px;
    height: 300px;
}

.start-btn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 40px rgba(6, 182, 212, 0.35);
}

.start-btn:active {
    transform: translateY(-1px) scale(1.01);
}

.start-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* === Winners Section === */
.winners-section {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    padding: 36px;
    margin-bottom: 36px;
}

.winners-section h2 {
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
    font-size: 1.6em;
    font-weight: 700;
}

.winners-display {
    display: grid;
    gap: 12px;
}

.winner-card {
    background: var(--bg-glass);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 16px;
}

.winner-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.winner-card.grand-prize {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(251, 191, 36, 0.04) 100%);
    border-color: rgba(245, 158, 11, 0.25);
}

.winner-card.grand-prize:hover {
    border-color: rgba(245, 158, 11, 0.4);
}

.winner-card.consolation-prize {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.06) 0%, rgba(20, 184, 166, 0.04) 100%);
    border-color: rgba(6, 182, 212, 0.2);
}

.winner-card.consolation-prize:hover {
    border-color: rgba(6, 182, 212, 0.35);
}

.winner-card.grand-subsequent {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.04) 0%, rgba(251, 191, 36, 0.02) 100%);
    border-color: rgba(245, 158, 11, 0.12);
    opacity: 0.85;
}

.winner-card.grand-subsequent:hover {
    border-color: rgba(245, 158, 11, 0.25);
    opacity: 1;
}

.winner-card.consolation-subsequent {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.06) 0%, rgba(168, 85, 247, 0.03) 100%);
    border-color: rgba(139, 92, 246, 0.15);
    opacity: 0.85;
}

.winner-card.consolation-subsequent:hover {
    border-color: rgba(139, 92, 246, 0.3);
    opacity: 1;
}

.winner-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    white-space: nowrap;
    border: 1px solid var(--border-subtle);
}

.winner-info {
    flex: 1;
}

.winner-name {
    font-size: 1.15em;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.winner-time {
    color: var(--text-muted);
    font-size: 0.85em;
}

.no-winners {
    text-align: center;
    color: var(--text-muted);
    padding: 48px;
    font-size: 1em;
    font-weight: 400;
}

/* === Public Conversations === */
.public-conversations {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    padding: 36px;
    margin-bottom: 48px;
}

.public-conversations h2 {
    color: var(--text-primary);
    margin-bottom: 10px;
    text-align: center;
    font-size: 1.6em;
    font-weight: 700;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 28px;
    font-size: 0.95em;
}

.conversations-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.conversation-card {
    background: var(--bg-glass);
    padding: 20px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-subtle);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.conversation-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.conversation-card.success {
    border-color: rgba(245, 158, 11, 0.3);
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.06) 0%, var(--bg-glass) 100%);
}

.conversation-card.success:hover {
    border-color: rgba(245, 158, 11, 0.45);
}

.conversation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.conversation-user {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1em;
}

.conversation-time {
    color: var(--text-muted);
    font-size: 0.8em;
}

.conversation-preview {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9em;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.success-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
    color: #000;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.8em;
    margin-left: 8px;
    font-weight: 700;
}

/* === Modal === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    padding: 36px;
    border-radius: var(--radius-xl);
    max-width: 460px;
    width: 90%;
    box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
}

.modal-content h2 {
    color: var(--text-primary);
    margin-bottom: 8px;
    text-align: center;
    font-size: 1.5em;
    font-weight: 700;
}

.modal-desc {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 24px;
    font-size: 0.9em;
    line-height: 1.6;
}

.modal-content input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 0.95em;
    margin-bottom: 12px;
    transition: border-color var(--transition-fast);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
}

.modal-content input::placeholder {
    color: var(--text-muted);
}

.modal-content input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.cf-turnstile {
    margin: 16px auto;
    display: flex;
    justify-content: center;
}

.submit-btn,
.cancel-btn,
.btn-secondary {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1em;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-top: 8px;
    font-weight: 600;
    font-family: inherit;
}

.submit-btn {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
}

.submit-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

.cancel-btn,
.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.cancel-btn:hover,
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* === Chat Interface === */
.chat-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    height: calc(100vh - 40px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(20, 184, 166, 0.08) 100%);
    border-bottom: 1px solid var(--border-subtle);
    color: white;
    padding: 16px 20px;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-title h2 {
    font-size: 1.15em;
    margin-bottom: 2px;
    font-weight: 700;
}

.turn-counter {
    font-size: 0.82em;
    color: var(--text-secondary);
    font-weight: 500;
}

.back-btn,
.home-btn {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    font-size: 0.9em;
}

.back-btn:hover,
.home-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: var(--bg-primary);
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.message {
    margin-bottom: 16px;
    display: flex;
}

.message.user {
    justify-content: flex-end;
}

.message-content {
    max-width: 70%;
    padding: 12px 18px;
    border-radius: var(--radius-lg);
    line-height: 1.7;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 0.95em;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
    border-radius: var(--radius-lg) var(--radius-lg) 2px var(--radius-lg);
}

.message.assistant .message-content {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 2px;
}

.loading-dots {
    display: flex;
    gap: 5px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) {
    animation-delay: -0.32s;
}

.loading-dots span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {

    0%,
    80%,
    100% {
        transform: scale(0);
    }

    40% {
        transform: scale(1);
    }
}

.chat-input-section {
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.chat-status {
    margin-bottom: 10px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.88em;
    font-weight: 500;
    display: none;
}

.chat-status.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-emerald);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.chat-status.error {
    display: block;
    background: rgba(244, 63, 94, 0.1);
    color: var(--accent-rose-light);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.chat-status.warning {
    display: block;
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-gold-light);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.chat-input-wrapper {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.upload-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    width: 42px;
    height: 42px;
    min-width: 42px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.upload-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

#messageInput {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 0.95em;
    resize: none;
    font-family: inherit;
    transition: border-color var(--transition-fast), height 0.15s ease;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    outline: none;
    min-height: 42px;
    max-height: 150px;
    overflow-y: hidden;
    line-height: 1.5;
}

#messageInput::placeholder {
    color: var(--text-muted);
}

#messageInput:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.08);
}

/* 图片预览 */
.image-preview {
    margin-bottom: 10px;
}

.image-preview-inner {
    display: inline-flex;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: rgba(0, 0, 0, 0.2);
}

.image-preview-inner img {
    max-width: 120px;
    max-height: 120px;
    object-fit: cover;
    display: block;
    border-radius: var(--radius-md);
}

.image-preview.uploading .image-preview-inner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse-overlay 1.2s ease-in-out infinite;
}

@keyframes pulse-overlay {

    0%,
    100% {
        opacity: 0.3;
    }

    50% {
        opacity: 0.7;
    }
}

.remove-image-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: background var(--transition-fast);
}

.remove-image-btn:hover {
    background: rgba(244, 63, 94, 0.8);
}

/* 消息中的图片 */
.message-image {
    max-width: 200px;
    max-height: 200px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    cursor: pointer;
    display: block;
    object-fit: cover;
    transition: opacity var(--transition-fast);
}

.message-image:hover {
    opacity: 0.85;
}

.send-btn {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
    border: none;
    padding: 10px 28px;
    height: 42px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 600;
    transition: all var(--transition-base);
    font-family: inherit;
}

.send-btn:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

.send-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* === User Page === */
.user-section {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    padding: 36px;
}

.new-chat-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
    border: none;
    padding: 18px;
    border-radius: var(--radius-lg);
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 24px;
    transition: all var(--transition-base);
    box-shadow: 0 4px 16px var(--accent-cyan-glow);
    font-family: inherit;
    letter-spacing: 0.02em;
}

.new-chat-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.3);
}

.user-conversations {
    display: grid;
    gap: 12px;
}

.user-conversation-card {
    background: var(--bg-glass);
    padding: 18px 20px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-subtle);
}

.user-conversation-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.user-conversation-card.success {
    border-color: rgba(245, 158, 11, 0.3);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.06) 0%, var(--bg-glass) 100%);
}

.user-conversation-card.inactive {
    opacity: 0.5;
}

/* === Admin Page === */
.admin-section {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    padding: 36px;
}

.admin-section h2 {
    color: var(--text-primary);
    margin-bottom: 24px;
    font-size: 1.5em;
    font-weight: 700;
}

.admin-conversations {
    display: grid;
    gap: 16px;
}

.admin-conversation-card {
    background: var(--bg-glass);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.admin-conversation-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.admin-conversation-card.success {
    border-color: rgba(245, 158, 11, 0.3);
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.06) 0%, var(--bg-glass) 100%);
}

.admin-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
}

.admin-user-section {
    flex: 1;
}

.admin-user-name {
    font-size: 1.15em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.user-icon {
    font-size: 1.1em;
}

.status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 0.7em;
    font-weight: 600;
}

.status-badge.success {
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
    color: #000;
}

.status-badge.active {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
}

.status-badge.inactive {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
}

.admin-user-info {
    color: var(--text-secondary);
    font-size: 0.88em;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 8px;
}

.info-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.admin-password-info {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9em;
    margin-top: 8px;
}

.admin-password-info strong {
    color: var(--accent-gold-light);
    font-size: 1.05em;
}

.admin-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 110px;
}

.view-btn,
.hide-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.88em;
    font-weight: 600;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-family: inherit;
}

.view-btn {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
}

.view-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-cyan-glow);
}

.hide-btn {
    background: rgba(244, 63, 94, 0.15);
    color: var(--accent-rose-light);
    border: 1px solid rgba(244, 63, 94, 0.2);
}

.hide-btn:hover {
    background: rgba(244, 63, 94, 0.25);
    transform: translateY(-1px);
}

.hidden-badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    font-size: 0.85em;
    text-align: center;
}

.admin-alert {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan-light);
    padding: 14px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md), 0 0 20px var(--accent-cyan-glow);
    z-index: 10000;
    animation: slideInRight 0.3s ease;
    font-weight: 600;
    font-size: 0.9em;
}

.admin-alert.fade-out {
    animation: fadeOut 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

.no-data {
    text-align: center;
    color: var(--text-muted);
    padding: 48px;
    font-size: 1em;
}

/* === Footer === */
.footer {
    text-align: center;
    color: var(--text-muted);
    padding: 24px;
    font-size: 0.85em;
}

.footer p {
    margin: 4px 0;
}

.footer a {
    color: var(--accent-cyan);
    text-decoration: none;
    border-bottom: 1px solid rgba(6, 182, 212, 0.3);
    transition: all var(--transition-fast);
    font-weight: 500;
}

.footer a:hover {
    border-bottom-color: var(--accent-cyan);
}

/* === Pagination === */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    color: var(--text-secondary);
    font-size: 0.9em;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-btn:hover:not(:disabled):not(.active) {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.pagination-btn.active {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: white;
    font-weight: 700;
}

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

.pagination-dots {
    color: var(--text-muted);
    font-size: 0.9em;
    padding: 0 4px;
    user-select: none;
}

/* === Character Counter === */
.char-counter-wrapper {
    display: flex;
    justify-content: flex-end;
    padding: 4px 4px 0 0;
}

.char-counter {
    font-size: 0.78em;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    transition: color var(--transition-fast);
}

.char-counter.warning {
    color: var(--accent-gold);
}

.char-counter.over {
    color: var(--accent-rose-light);
    font-weight: 600;
}

/* === Admin Pagination === */
.admin-pagination {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border-subtle);
}

.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.page-btn {
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    color: var(--text-secondary);
    font-size: 0.88em;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

.page-btn:hover:not(:disabled):not(.active) {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.page-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    border-color: var(--accent-cyan);
    color: white;
    font-weight: 700;
    box-shadow: 0 2px 10px var(--accent-cyan-glow);
}

.page-btn:disabled,
.page-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.page-ellipsis {
    color: var(--text-muted);
    font-size: 0.9em;
    padding: 0 4px;
    user-select: none;
}

.page-info {
    color: var(--text-muted);
    font-size: 0.82em;
    font-weight: 500;
}

/* === Loading === */
.loading {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
    font-size: 0.9em;
}

/* === Custom Alert === */
.custom-alert-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.custom-alert {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 36px;
    max-width: 460px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    text-align: center;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.custom-alert.success {
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.15) 0%, var(--bg-secondary) 100%);
    border-color: rgba(245, 158, 11, 0.3);
}

.custom-alert-icon {
    font-size: 3.5em;
    margin-bottom: 16px;
}

.custom-alert-message {
    font-size: 1.05em;
    line-height: 1.7;
    margin-bottom: 24px;
    white-space: pre-line;
    color: var(--text-secondary);
}

.custom-alert.success .custom-alert-message {
    color: var(--text-primary);
}

.custom-alert-btn {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    color: white;
    border: none;
    padding: 12px 40px;
    border-radius: 40px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
}

.custom-alert.success .custom-alert-btn {
    background: var(--accent-gold);
    color: #000;
}

.custom-alert-btn:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

/* === Verify Button === */
.verify-btn {
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-teal) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.95em;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    margin: 10px 0;
    font-family: inherit;
}

.verify-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

.verify-btn.verified {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent-emerald);
    cursor: default;
    box-shadow: none;
}

/* === Aliyun Captcha Elements === */
#aliyun-captcha-element,
#aliyun-captcha-chat-element {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
}

/* === Responsive === */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header {
        padding: 32px 16px 16px;
        margin-bottom: 32px;
    }

    .header h1 {
        font-size: 1.8em;
    }

    .subtitle {
        font-size: 0.95em;
    }

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

    .start-btn {
        padding: 16px 40px;
        font-size: 1.1em;
    }

    .modal-content {
        padding: 28px 20px;
    }

    .message-content {
        max-width: 85%;
    }

    .chat-container {
        border-radius: 0;
        height: 100vh;
        border: none;
    }

    .chat-header {
        border-radius: 0;
    }

    .chat-input-section {
        border-radius: 0;
    }

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

    .winners-section,
    .public-conversations,
    .user-section,
    .admin-section {
        padding: 24px 16px;
        border-radius: var(--radius-lg);
    }

    .admin-card-header {
        flex-direction: column;
    }

    .admin-actions {
        flex-direction: row;
        width: 100%;
    }

    .admin-actions button,
    .admin-actions span {
        flex: 1;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .conversations-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === Scrollbar Global === */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}