:root {
    --bg-base: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fa;
    --bg-surface: #f5f5f5;
    --bg-surface-2: #eeeeee;
    --border: #e0e0e0;
    --border-subtle: #eeeeee;
    --text-primary: #212121;
    --text-muted: #757575;
    --text-dim: #9e9e9e;
    --accent: #2196f3;
    --accent-dark: #1976d2;
    --accent-glow: rgba(33, 150, 243, 0.1);

    --badge-bailian: #ff6b00;
    --badge-kimi-code: #00c853;
    --badge-default: #f5f5f5;

    --status-valid: #4caf50;
    --status-invalid: #f44336;

    --nav-height: 60px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

@font-face {
    font-family: 'Roboto Mono';
    src: url('/RobotoMono-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scrollbar-width: thin;
    scrollbar-color: #ccc #f5f5f5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.top-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-height);
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-content {
    width: 100%;
    max-width: 1200px;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

/* Scanner Control */
.scanner-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.scanner-label {
    font-size: 13px;
    color: var(--text-muted);
}

.scanner-status {
    font-size: 12px;
    color: var(--text-muted);
    min-width: 50px;
}

.scanner-status.disabled {
    color: var(--status-invalid);
}

.scanner-toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.scanner-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.scanner-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .3s;
    border-radius: 24px;
}

.scanner-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}

.scanner-toggle input:checked + .scanner-slider {
    background-color: var(--accent);
}

.scanner-toggle input:checked + .scanner-slider:before {
    transform: translateX(20px);
}

.scanner-toggle input:disabled + .scanner-slider {
    opacity: 0.6;
    cursor: not-allowed;
}

/* View system */
.view {
    display: none;
    flex-direction: column;
    min-height: calc(100vh - var(--nav-height));
}

.view.active {
    display: flex;
}

/* Login Page */
.login-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background-color: var(--bg-surface);
}

.login-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.login-box h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
}

.login-box form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-box input[type="password"] {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-box input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-box .btn {
    width: 100%;
    text-align: center;
    padding: 12px;
    font-size: 15px;
}

.login-error {
    margin-top: 12px;
    padding: 12px;
    border-radius: var(--radius-sm);
    background-color: rgba(244, 67, 54, 0.1);
    color: #c62828;
    border: 1px solid rgba(244, 67, 54, 0.3);
    font-size: 13px;
    display: none;
}

.login-error.show {
    display: block;
}

/* Section Header */
.section-header {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 20px;
}

.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* Stats Container */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.stat-value {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-value.valid {
    color: var(--status-valid);
}

.stat-value.invalid {
    color: var(--status-invalid);
}

/* Add Key Section */
.add-key-section {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 24px;
}

.add-key-section h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.add-key-form {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

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

.form-group textarea {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    color: var(--text-primary);
    font-family: 'Roboto Mono', monospace;
    font-size: 13px;
    resize: vertical;
    min-height: 80px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea::placeholder {
    color: var(--text-dim);
}

.form-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.provider-select,
.status-select {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.provider-select:focus,
.status-select:focus {
    outline: none;
    border-color: var(--accent);
}

.btn {
    all: unset;
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-dark);
}

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

.btn-secondary:hover {
    background-color: var(--bg-surface-2);
}

.btn-danger {
    background-color: var(--status-invalid);
    color: #fff;
}

.btn-danger:hover {
    background-color: #d32f2f;
}

.result-message {
    margin-top: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    display: none;
}

.result-message.success {
    display: block;
    background-color: rgba(76, 175, 80, 0.1);
    color: #2e7d32;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.result-message.error {
    display: block;
    background-color: rgba(244, 67, 54, 0.1);
    color: #c62828;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

/* Filter Bar */
.filter-bar {
    position: sticky;
    top: var(--nav-height);
    z-index: 90;
    width: 100%;
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.filter-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.tabs {
    width: 100%;
    max-width: 900px;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

.tabs::-webkit-scrollbar {
    display: none;
}

@media (min-width: 700px) {
    .tabs {
        justify-content: center;
    }
}

.tab {
    all: unset;
    cursor: pointer;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 13px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    flex-shrink: 0;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-2);
}

.tab.active {
    color: var(--accent);
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.tab:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.info {
    width: 100%;
    max-width: 900px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 4px;
    color: var(--text-dim);
    font-size: 11px;
}

/* Key Grid for key management */
.key-grid {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(360px, 100%), 1fr));
    row-gap: 16px;
    column-gap: 16px;
}

.key-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: box-shadow 0.2s, transform 0.2s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    opacity: 0;
    animation: fadeInUp 0.4s ease-out forwards;
}

.key-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.key-card-header {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.key-header-row {
    display: flex;
    justify-content: flex-end;
}

.key-display-wrapper {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.key-display {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-family: 'Roboto Mono', monospace;
    font-size: 12px;
    color: var(--text-primary);
    flex-grow: 1;
    word-break: break-all;
    line-height: 1.5;
    min-height: 40px;
}

.copy-btn {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.2s;
}

.copy-btn:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.copy-btn.copied {
    background-color: var(--status-valid);
    border-color: var(--status-valid);
    color: #fff;
}

.key-status {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.key-status.valid {
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--status-valid);
}

.key-status.invalid {
    background-color: rgba(244, 67, 54, 0.1);
    color: var(--status-invalid);
}

.key-status::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: currentColor;
}

.key-info {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
    font-size: 13px;
    color: var(--text-muted);
}

.key-info-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.key-info-label {
    color: var(--text-dim);
}

.card-provider-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
}

.card-provider-badge.bailian {
    background-color: rgba(255, 107, 0, 0.1);
    color: var(--badge-bailian);
}

.card-provider-badge.kimi-code {
    background-color: rgba(0, 200, 83, 0.1);
    color: var(--badge-kimi-code);
}

.key-actions {
    display: flex;
    gap: 10px;
    margin-top: auto;
    padding-top: 8px;
    border-top: 1px solid var(--border-subtle);
}

.key-actions .btn {
    padding: 8px 16px;
    font-size: 12px;
}

/* Messages */
.end-message {
    text-align: center;
    padding: 20px;
    color: var(--text-dim);
    font-size: 13px;
}

.grid-message {
    grid-column: 1 / -1;
    text-align: center;
}

.empty-message {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 14px;
}

.loading-message {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 14px;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

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

.github-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 12px;
    transition: color 0.2s ease;
}

.github-link:hover {
    color: var(--text-primary);
}

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

::-webkit-scrollbar-track {
    background: #f5f5f5;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: 12px;
        padding: 12px;
    }

    .top-nav {
        height: auto;
        padding: 12px 0;
    }

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

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .form-actions .btn,
    .form-actions select {
        width: 100%;
    }
}