:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.85);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --accent: #f59e0b;
    --accent-hover: #fbbf24;
    --danger: #ef4444;
    --success: #22c55e;
    --info: #3b82f6;
    --fire: #ef4444;
    --water: #3b82f6;
    --wind: #22c55e;
    --light: #eab308;
    --dark: #a855f7;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

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

button {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
    background: var(--accent);
    color: #1a1a1a;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #334155;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}

.main-nav {
    display: flex;
    gap: 8px;
}

.main-nav a {
    padding: 8px 16px;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent);
}

.player-info {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
}

#main-view {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    min-height: calc(100vh - 70px);
}

.view-section {
    animation: fadeIn 0.3s ease;
}

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

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    backdrop-filter: blur(10px);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.grid {
    display: grid;
    gap: 16px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .game-header { flex-wrap: wrap; gap: 10px; }
    .main-nav { order: 3; width: 100%; justify-content: center; }
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Toast 提示 */
#toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease;
    min-width: 200px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--info); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Modal */
#modal-container {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
}

#modal-container.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    animation: scaleIn 0.2s ease;
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* 元素颜色 */
.element-fire { color: var(--fire); }
.element-water { color: var(--water); }
.element-wind { color: var(--wind); }
.element-light { color: var(--light); }
.element-dark { color: var(--dark); }

.bg-element-fire { background: linear-gradient(135deg, #ef4444, #b91c1c); }
.bg-element-water { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.bg-element-wind { background: linear-gradient(135deg, #22c55e, #15803d); }
.bg-element-light { background: linear-gradient(135deg, #eab308, #a16207); }
.bg-element-dark { background: linear-gradient(135deg, #a855f7, #7e22ce); }