/* ========== CSS Variables ========== */
:root {
    --primary: #0066FF;
    --primary-dark: #0052CC;
    --primary-light: #4D94FF;
    --primary-bg: rgba(0, 102, 255, 0.08);
    --success: #00C853;
    --success-dark: #00A844;
    --success-bg: rgba(0, 200, 83, 0.08);
    --warning: #FF9500;
    --warning-bg: rgba(255, 149, 0, 0.08);
    --danger: #FF3B30;
    --danger-dark: #D32F2F;
    --danger-bg: rgba(255, 59, 48, 0.08);
    --bg-primary: #FAFBFC;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F4F5F7;
    --bg-dark: #0D1117;
    --bg-dark-secondary: #161B22;
    --border-color: #E1E4E8;
    --border-light: #F0F0F0;
    --text-primary: #1F2328;
    --text-secondary: #656D76;
    --text-muted: #8B949E;
    --text-inverse: #FFFFFF;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.16);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #21262D;
    --border-color: #30363D;
    --border-light: #21262D;
    --text-primary: #E6EDF3;
    --text-secondary: #8B949E;
    --text-muted: #6E7681;
    --primary-bg: rgba(0, 102, 255, 0.15);
    --success-bg: rgba(0, 200, 83, 0.15);
    --warning-bg: rgba(255, 149, 0, 0.15);
    --danger-bg: rgba(255, 59, 48, 0.15);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.5);
}

/* ========== Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 14px; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ========== Login Page ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0D1117 0%, #161B22 50%, #1C2128 100%);
    position: relative;
    overflow: hidden;
}
.login-page::before {
    content: '';
    position: absolute;
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
    top: -300px; right: -200px;
    animation: float 15s ease-in-out infinite;
}
.login-page::after {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0, 200, 83, 0.1) 0%, transparent 70%);
    bottom: -200px; left: -100px;
    animation: float 12s ease-in-out infinite reverse;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 30px) scale(1.05); }
}
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    z-index: 1;
}
.login-brand {
    text-align: center;
    color: var(--text-inverse);
}
.brand-icon {
    width: 80px; height: 80px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    overflow: hidden;
}
.brand-icon img { width: 100%; height: 100%; object-fit: contain; }
.brand-icon svg { width: 40px; height: 40px; color: white; }

/* Logo theme switching */
[data-theme="dark"] .logo-img {
    content: url('/static/logo_withe.png');
}
.login-brand h1 { font-size: 32px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 8px; }
.login-brand p { color: var(--text-muted); font-size: 16px; }
.login-box {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: var(--radius-xl);
    width: 420px;
    box-shadow: var(--shadow-xl);
}
.login-box h2 { font-size: 24px; font-weight: 600; margin-bottom: 8px; }
.login-subtitle { color: var(--text-secondary); margin-bottom: 32px; }
.input-wrapper {
    position: relative;
}
.input-wrapper input { padding-right: 44px; }
.input-icon {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    opacity: 0.5;
}

/* ========== Form Elements ========== */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
    background: var(--bg-secondary);
}
.form-group textarea {
    min-height: 140px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    resize: vertical;
}
.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-sm svg { width: 14px; height: 14px; }
.btn-lg { padding: 14px 24px; font-size: 15px; }
.btn-block { width: 100%; }
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.25);
}
.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.35);
}
.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 200, 83, 0.25);
}
.btn-success:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 200, 83, 0.35);
}
.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(255, 59, 48, 0.25);
}
.btn-danger:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 59, 48, 0.35);
}
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.btn-ghost:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--text-muted);
}

/* ========== App Layout ========== */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.top-nav {
    height: 60px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 32px;
    position: sticky;
    top: 0;
    z-index: 50;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 16px;
    color: var(--text-primary);
}
.brand-icon-sm {
    width: 36px; height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.brand-icon-sm img { width: 100%; height: 100%; object-fit: contain; }
.nav-tabs {
    display: flex;
    gap: 4px;
    flex: 1;
}
.nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.nav-tab svg { width: 18px; height: 18px; }
.nav-tab:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.nav-tab.active {
    background: var(--primary-bg);
    color: var(--primary);
}
.nav-actions { display: flex; align-items: center; gap: 8px; }
.main-content { flex: 1; display: flex; flex-direction: column; }
.page { display: none; flex: 1; }
.page.active { display: flex; }

/* ========== Theme Toggle ========== */
.theme-toggle {
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--text-secondary);
}
.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
    border-color: var(--text-muted);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }


/* ========== Status Page ========== */
.status-page, .proxies-page, .whitelist-page {
    flex: 1;
    padding: 32px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}
.page-header {
    margin-bottom: 32px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.page-header h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.page-header p { color: var(--text-secondary); font-size: 15px; }
.page-header .header-left { flex: 1; min-width: 200px; }
.page-header .header-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}
.stat-card {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}
.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}
.stat-icon svg { width: 28px; height: 28px; }
.stat-icon.online { background: var(--primary-bg); color: var(--primary); }
.stat-icon.total { background: var(--primary-bg); color: var(--primary); }
.stat-icon.success { background: var(--success-bg); color: var(--success); }
.stat-icon.danger { background: var(--danger-bg); color: var(--danger); }
.stat-icon.whitelist { background: var(--warning-bg); color: var(--warning); }
.stat-icon.session { background: rgba(139, 92, 246, 0.1); color: #8B5CF6; }
.stat-info { flex: 1; }
.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -1px;
}
.stat-value.uptime {
    font-size: 18px;
    font-weight: 600;
}
.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}
.info-card {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}
.info-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.info-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.6;
}
.info-card strong {
    color: var(--primary);
    font-family: 'SF Mono', 'Consolas', monospace;
}

.refresh-section {
    display: flex;
    justify-content: center;
    padding-top: 20px;
}

/* ========== Proxy Table ========== */
.proxy-table-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: auto;
    max-height: calc(100vh - 280px);
}
.proxy-table {
    width: 100%;
    border-collapse: collapse;
}
.proxy-table th, .proxy-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
}
.proxy-table th {
    background: var(--bg-tertiary);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 10;
}
.proxy-table tbody tr { transition: var(--transition); }
.proxy-table tbody tr:hover { background: var(--bg-primary); }
.proxy-table tbody tr:last-child td { border-bottom: none; }

.protocol-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}
.protocol-badge.socks5 {
    background: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}
.protocol-badge.http {
    background: var(--primary-bg);
    color: var(--primary);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.status-badge.online {
    background: var(--success-bg);
    color: var(--success-dark);
}
.status-badge.offline {
    background: var(--danger-bg);
    color: var(--danger);
}
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.code-text {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    background: var(--bg-tertiary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

.table-actions {
    display: flex;
    gap: 8px;
}

/* ========== Whitelist Page ========== */
.whitelist-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 24px;
}
.whitelist-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}
.whitelist-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}
.whitelist-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.whitelist-ip {
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}
.whitelist-item .btn-danger {
    padding: 6px 12px;
}

.loading-state, .empty-state-text {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

/* ========== Pagination ========== */
.pagination-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.pagination-info {
    color: var(--text-muted);
    font-size: 13px;
}
.pagination-buttons {
    display: flex;
    align-items: center;
    gap: 4px;
}
.pagination-ellipsis {
    padding: 0 8px;
    color: var(--text-muted);
}


/* ========== Modal ========== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 100;
    animation: fadeIn 0.2s ease;
}
.modal-overlay.show { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
    display: none;
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 32px;
    z-index: 101;
    min-width: 480px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease forwards;
}
.modal.show { display: block; }
@keyframes modalIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.95); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
.modal h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}
.modal-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
    line-height: 1.6;
}

/* ========== Toast ========== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastIn 0.4s ease;
    box-shadow: var(--shadow-lg);
    min-width: 280px;
}
.toast.success { background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%); }
.toast.error { background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%); }
@keyframes toastIn {
    from { transform: translateX(100px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ========== Loading ========== */
.loading {
    width: 32px; height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    text-align: center;
}
.loading-overlay p { margin-top: 16px; color: var(--text-secondary); }

/* ========== Import Result ========== */
.import-result {
    background: var(--bg-tertiary);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}
.import-result p {
    margin-bottom: 8px;
    color: var(--text-secondary);
}
.import-result strong {
    color: var(--primary);
}
.error-list {
    max-height: 200px;
    overflow-y: auto;
    margin-top: 16px;
}
.error-item {
    background: var(--danger-bg);
    color: var(--danger);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    font-size: 12px;
    font-family: 'SF Mono', monospace;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .top-nav {
        padding: 0 16px;
        gap: 16px;
    }
    .nav-brand span { display: none; }
    .nav-tab span { display: none; }
    .status-page, .proxies-page, .whitelist-page {
        padding: 16px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .modal {
        min-width: auto;
        width: 95vw;
        padding: 24px;
    }
}