/* ===== 全局变量 ===== */
:root {
    --bg-deep: #0b0b14;
    --bg-primary: #0f0f1a;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --text-primary: #e4e4f0;
    --text-secondary: #7a7a96;
    --text-dim: #55556e;
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --danger: #ff4757;
    --danger-glow: rgba(255, 71, 87, 0.3);
    --border: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.1);
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* 角色颜色 */
    --c0: #ff6b6b;
    --c1: #51cf66;
    --c2: #339af0;
    --c3: #cc5de8;
    --c0-glow: rgba(255, 107, 107, 0.35);
    --c1-glow: rgba(81, 207, 102, 0.35);
    --c2-glow: rgba(51, 154, 240, 0.35);
    --c3-glow: rgba(204, 93, 232, 0.35);
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-deep);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(108, 92, 231, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(204, 93, 232, 0.06) 0%, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ===== 首页 ===== */
.home-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 40px 36px;
    max-width: 420px;
    width: 100%;
    box-shadow: var(--shadow);
}

.logo-area {
    text-align: center;
    margin-bottom: 32px;
}

.logo-icon {
    font-size: 48px;
    margin-bottom: 12px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.title {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--c3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 6px;
}

.section {
    margin-bottom: 20px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(108, 92, 231, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    width: auto;
    white-space: nowrap;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* 输入框组 */
.input-group {
    display: flex;
    gap: 10px;
}

.input-group input {
    flex: 1;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', 'Inter', monospace;
    font-size: 16px;
    letter-spacing: 4px;
    text-align: center;
    outline: none;
    transition: border-color 0.2s;
}

.input-group input::placeholder {
    letter-spacing: 0;
    color: var(--text-dim);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
}

.input-group input:focus {
    border-color: var(--accent);
}

/* 分隔线 */
.divider {
    display: flex;
    align-items: center;
    margin: 24px 0;
    color: var(--text-dim);
    font-size: 13px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.divider span {
    padding: 0 14px;
}

/* 使用方法 */
.how-to-use {
    margin-top: 28px;
    padding: 16px 20px;
    background: rgba(108, 92, 231, 0.06);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(108, 92, 231, 0.12);
}

.how-to-use h3 {
    font-size: 13px;
    color: var(--accent-light);
    margin-bottom: 10px;
    font-weight: 600;
}

.how-to-use ol {
    padding-left: 18px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer {
    margin-top: 32px;
    font-size: 12px;
    color: var(--text-dim);
}

/* ========================================
   房间页
   ======================================== */
.room-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0;
}

/* 顶部信息栏 */
.room-header {
    width: 100%;
    max-width: 500px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.back-btn {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 20px;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.back-btn:hover {
    background: var(--bg-card-hover);
}

.room-code-area {
    display: flex;
    align-items: center;
    gap: 6px;
}

.label {
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 700;
    color: var(--accent-light);
}

.copy-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    padding: 2px 4px;
    border-radius: 4px;
    transition: background 0.2s;
}

.copy-btn:hover {
    background: var(--bg-card-hover);
}

.path-area {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.path-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-primary);
}

/* 连接状态指示器 */
.status-indicator {
    margin-left: 8px;
}

.status-indicator .dot {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transition: background 0.3s;
}

.status-indicator.connected .dot {
    background: #51cf66;
    box-shadow: 0 0 8px rgba(81, 207, 102, 0.6);
}

.status-indicator.disconnected .dot {
    background: var(--danger);
    box-shadow: 0 0 8px var(--danger-glow);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* 角色选择栏 */
.controls-bar {
    width: 100%;
    max-width: 500px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    gap: 12px;
}

.char-buttons {
    display: flex;
    gap: 8px;
}

.char-btn {
    width: 56px;
    height: 48px;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.char-btn[data-color="0"] { background: var(--c0); }
.char-btn[data-color="1"] { background: var(--c1); }
.char-btn[data-color="2"] { background: var(--c2); }
.char-btn[data-color="3"] { background: var(--c3); }

.char-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.15);
}

.char-btn.active {
    transform: scale(1.1);
    border-color: #fff;
    box-shadow: 0 0 20px currentColor;
}

.char-btn[data-color="0"].active { box-shadow: 0 0 20px var(--c0-glow), 0 0 40px var(--c0-glow); }
.char-btn[data-color="1"].active { box-shadow: 0 0 20px var(--c1-glow), 0 0 40px var(--c1-glow); }
.char-btn[data-color="2"].active { box-shadow: 0 0 20px var(--c2-glow), 0 0 40px var(--c2-glow); }
.char-btn[data-color="3"].active { box-shadow: 0 0 20px var(--c3-glow), 0 0 40px var(--c3-glow); }

.char-label {
    position: relative;
    z-index: 1;
}

.reset-btn {
    padding: 10px 18px;
    background: rgba(255, 71, 87, 0.12);
    border: 1px solid rgba(255, 71, 87, 0.25);
    border-radius: var(--radius-sm);
    color: var(--danger);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.reset-btn:hover {
    background: rgba(255, 71, 87, 0.2);
    border-color: rgba(255, 71, 87, 0.4);
}

/* 平台网格 */
.grid-container {
    width: 100%;
    max-width: 500px;
    padding: 8px 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.platform-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.row-num {
    width: 28px;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dim);
    flex-shrink: 0;
}

.platform-cell {
    flex: 1;
    aspect-ratio: 1.6;
    max-height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dim);
    transition: all 0.15s ease;
    user-select: none;
    -webkit-user-select: none;
}

.platform-cell:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: scale(1.03);
}

.platform-cell:active {
    transform: scale(0.97);
}

.platform-cell.marked {
    color: rgba(255, 255, 255, 0.95);
    border-color: transparent;
    font-weight: 700;
    animation: markPop 0.25s ease;
}

@keyframes markPop {
    0% { transform: scale(0.9); }
    60% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

/* ===== 响应式 ===== */
@media (max-width: 480px) {
    .glass-card {
        padding: 28px 20px;
        margin: 12px;
    }

    .title { font-size: 24px; }

    .room-header {
        padding: 10px 12px;
    }

    .code { font-size: 14px; }

    .path-value {
        font-size: 15px;
        letter-spacing: 1px;
    }

    .char-btn {
        width: 48px;
        height: 42px;
        font-size: 12px;
    }

    .char-buttons { gap: 6px; }

    .controls-bar {
        padding: 10px 12px;
    }

    .grid-container {
        padding: 6px 12px 20px;
    }

    .platform-cell {
        font-size: 14px;
        max-height: 46px;
    }

    .row-num {
        width: 22px;
        font-size: 11px;
    }

    .reset-btn {
        padding: 8px 12px;
        font-size: 12px;
    }
}

@media (max-width: 360px) {
    .char-btn {
        width: 42px;
        height: 38px;
        font-size: 11px;
    }

    .path-value { font-size: 13px; }
}