/* ===== CSS Variables & Reset ===== */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-tertiary: #1a1a3e;
    --bg-card: #1e1e3f;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0c0;
    --text-muted: #6c6c90;
    --accent-primary: #00d4ff;
    --accent-secondary: #7c3aed;
    --accent-tertiary: #f59e0b;
    --accent-gradient: linear-gradient(135deg, #00d4ff, #7c3aed);
    --accent-gradient-hot: linear-gradient(135deg, #f59e0b, #ef4444);
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border-color: #2a2a5a;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    background-image: 
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(124, 58, 237, 0.03) 0%, transparent 50%);
}

/* ===== Container ===== */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== Header ===== */
.header {
    text-align: center;
    padding: 35px 20px;
    margin-bottom: 25px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 8px;
}

.logo i {
    font-size: 2.2rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Sections ===== */
section {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 22px;
    margin-bottom: 18px;
    box-shadow: var(--shadow);
}

section h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 18px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

section h2 i {
    color: var(--accent-primary);
    font-size: 0.95rem;
}

/* ===== Form Controls ===== */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group label i {
    margin-right: 4px;
    color: var(--accent-primary);
}

.form-group input[type="url"],
.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
    line-height: 1.5;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.url-count-badge {
    font-size: 0.65rem;
    background: var(--accent-primary);
    color: #000;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
    margin-left: 6px;
}

.input-hint {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.optional-badge {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-row-3 {
    grid-template-columns: 1fr 1fr 1fr;
}

@media (max-width: 768px) {
    .form-row, .form-row-3 {
        grid-template-columns: 1fr;
    }
}

/* ===== Loop Container ===== */
.loop-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.loop-container input[type="number"] {
    width: 70px;
    padding: 8px 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

/* ===== Toggle Switch ===== */
.toggle-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch.toggle-sm {
    width: 36px;
    height: 20px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    transition: 0.3s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-sm .toggle-slider::before {
    height: 14px;
    width: 14px;
    left: 2px;
    bottom: 2px;
}

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

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

.toggle-sm input:checked + .toggle-slider::before {
    transform: translateX(16px);
}

.toggle-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.toggle-label-sm {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-left: 6px;
}

/* ===== Proxy Source Section ===== */
.proxy-source-section {
    margin-bottom: 18px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.proxy-source-label {
    display: block;
    margin-bottom: 10px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.proxy-source-label i {
    margin-right: 4px;
    color: var(--accent-primary);
}

.proxy-source-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.proxy-tab {
    flex: 1;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.proxy-tab:hover {
    border-color: var(--accent-primary);
    color: var(--text-secondary);
}

.proxy-tab.active {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.1);
}

.proxy-info-box {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 14px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 10px;
}

.proxy-info-box i {
    color: var(--accent-primary);
    margin-top: 2px;
    flex-shrink: 0;
}

.proxy-info-tip {
    background: rgba(245, 158, 11, 0.05);
    border-color: rgba(245, 158, 11, 0.2);
}

.proxy-info-tip i {
    color: var(--accent-tertiary);
}

.proxy-info-box code {
    background: var(--bg-secondary);
    padding: 1px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--accent-primary);
}

.custom-proxy-textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 100px;
    transition: border-color 0.3s ease;
}

.custom-proxy-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.custom-proxy-textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

.proxy-count-info {
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ===== Preset Buttons ===== */
.preset-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}

.preset-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.preset-label i {
    color: var(--accent-tertiary);
    margin-right: 4px;
}

.btn-preset {
    padding: 6px 14px;
    font-size: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
    font-weight: 500;
}

.btn-preset:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.05);
}

.btn-preset i {
    margin-right: 4px;
}

/* ===== Buttons ===== */
.button-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn {
    padding: 11px 22px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-2px);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
    color: var(--text-primary);
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.stat-total .stat-icon {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-primary);
}

.stat-success .stat-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.stat-failed .stat-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.stat-proxies .stat-icon {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-secondary);
}

.stat-speed .stat-icon {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-tertiary);
}

.stat-rate .stat-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Progress Bar ===== */
.progress-container {
    margin-top: 18px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

#progressPercent {
    font-family: var(--font-mono);
    color: var(--accent-primary);
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== Results Table ===== */
.result-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

.table-container {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    max-height: 400px;
    overflow-y: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

thead {
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 1;
}

th {
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 8px 14px;
    border-bottom: 1px solid rgba(42, 42, 90, 0.5);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(0, 212, 255, 0.02);
}

.empty-row td {
    text-align: center;
    color: var(--text-muted);
    padding: 30px;
    font-family: var(--font-sans);
}

.status-success {
    color: var(--success);
    font-weight: 600;
}

.status-failed {
    color: var(--danger);
    font-weight: 600;
}

/* ===== Log Panel ===== */
.log-panel h2 {
    display: flex;
    align-items: center;
}

.log-container {
    background: #050510;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    padding: 12px;
    max-height: 350px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.73rem;
    line-height: 1.7;
}

.log-entry {
    padding: 1px 0;
    word-break: break-all;
}

.log-time {
    color: var(--text-muted);
    margin-right: 6px;
}

.log-info .log-message {
    color: var(--text-secondary);
}

.log-success .log-message {
    color: var(--success);
}

.log-error .log-message {
    color: var(--danger);
}

.log-warning .log-message {
    color: var(--warning);
}

/* ===== Scrollbar ===== */
.log-container::-webkit-scrollbar,
.table-container::-webkit-scrollbar {
    width: 5px;
}

.log-container::-webkit-scrollbar-track,
.table-container::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.log-container::-webkit-scrollbar-thumb,
.table-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.log-container::-webkit-scrollbar-thumb:hover,
.table-container::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 18px;
    color: var(--text-muted);
    font-size: 0.75rem;
}

.footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* ===== Animations ===== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1.5s infinite;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-5px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.log-entry {
    animation: slideIn 0.15s ease;
}

/* ===== Running indicator ===== */
.btn-primary.running {
    background: var(--accent-gradient-hot);
    animation: pulse 1.5s infinite;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 20px 12px;
    }
    
    .logo h1 {
        font-size: 1.3rem;
    }
    
    section {
        padding: 15px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
    }
    
    .preset-group {
        flex-wrap: wrap;
    }
}

/* ===== Background Mode ===== */
.bg-mode-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
}

.bg-status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 8px;
    margin-top: 8px;
    font-size: 0.8rem;
}

.bg-status-indicator {
    font-size: 1rem;
    animation: pulse 1.5s infinite;
}

.bg-status-indicator.running {
    color: #00ff88;
}

.bg-status-indicator.stopped {
    color: var(--text-secondary);
    animation: none;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.7rem;
    margin-left: auto;
}

/* ===== Background Monitor Panel ===== */
.bg-monitor-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.bg-monitor-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    animation: shimmer 2s infinite;
}

.bg-monitor-panel h2 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.bg-monitor-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.bg-monitor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bg-monitor-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.bg-pulse {
    font-size: 1.2rem;
    color: #00ff88;
    animation: pulse 1.5s infinite;
}

.bg-pulse.stopped {
    color: var(--text-secondary);
    animation: none;
}

.bg-pulse.completed {
    color: #ffd700;
    animation: none;
}

.bg-monitor-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 16px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.bg-info-row {
    display: flex;
    gap: 6px;
    font-size: 0.8rem;
}

.bg-info-label {
    color: var(--text-secondary);
    min-width: 60px;
}

.bg-info-value {
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

.bg-monitor-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.bg-stat {
    text-align: center;
    padding: 8px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.bg-stat-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
}

.bg-stat-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bg-stat-success { color: #00ff88; }
.bg-stat-failed { color: #ff4757; }
.bg-stat-total { color: #ffd700; }
.bg-stat-target { color: #00d2ff; }

.bg-monitor-progress {
    display: flex;
    align-items: center;
    gap: 10px;
}

.bg-monitor-progress .progress-bar {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.bg-monitor-progress .progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.bg-progress-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    min-width: 40px;
    text-align: right;
}

.bg-monitor-logs {
    max-height: 150px;
    overflow-y: auto;
    padding: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.bg-log-entry {
    padding: 2px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.bg-log-entry:last-child {
    border-bottom: none;
}

.bg-log-entry.success { color: #00ff88; }
.bg-log-entry.error { color: #ff4757; }
.bg-log-entry.warning { color: #ffd700; }