/* ========== Variables ========== */
:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-card: #1e2130;
    --bg-hover: #252838;
    --text-primary: #e4e6f0;
    --text-secondary: #8b8fa3;
    --text-muted: #5c5f73;
    --border-color: #2a2d3e;
    --accent-blue: #4f8cff;
    --accent-green: #34d399;
    --accent-red: #f87171;
    --accent-orange: #fb923c;
    --accent-purple: #a78bfa;
    --accent-cyan: #22d3ee;
    --accent-yellow: #fbbf24;
    --sidebar-width: 240px;
    --sidebar-collapsed: 64px;
    --topbar-height: 60px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --transition: all 0.3s ease;
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}
a { color: var(--accent-blue); text-decoration: none; }
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-2 { margin-top: 12px; }

/* ========== Login ========== */
.login-container {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f1117 0%, #1a1d27 50%, #1e1233 100%);
}
.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 48px 40px;
    width: 100%; max-width: 420px;
    box-shadow: var(--shadow);
}
.login-logo {
    text-align: center; margin-bottom: 32px;
}
.login-logo i {
    font-size: 48px;
    background: linear-gradient(135deg, #833ab4, #fd1d1d, #fcb045);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.login-logo h1 { font-size: 24px; margin-top: 12px; font-weight: 700; }
.login-logo p { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }
.error-msg { color: var(--accent-red); text-align: center; margin-top: 16px; font-size: 14px; }

/* ========== Forms ========== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 14px; background: var(--bg-secondary);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 14px; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus {
    outline: none; border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(79,140,255,0.15);
}
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.toggle-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; }
.toggle-label input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent-blue); }
.input-sm { padding: 8px 12px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-sm); color: var(--text-primary); font-size: 13px; width: 120px; }
.inline-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ========== Buttons ========== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 20px; border: none; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.btn-primary { background: var(--accent-blue); color: #fff; }
.btn-primary:hover { background: #3d7ae8; }
.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--border-color); }
.btn-danger { background: var(--accent-red); color: #fff; }
.btn-danger:hover { background: #e85d5d; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; }
.btn-close { background: none; border: none; color: var(--text-secondary); font-size: 24px; cursor: pointer; }
.btn-icon { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 4px 8px; border-radius: 4px; }
.btn-icon:hover { color: var(--text-primary); background: var(--bg-hover); }

/* ========== Layout ========== */
#app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: var(--sidebar-width); background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
    transition: var(--transition);
}
.sidebar-header {
    height: var(--topbar-height); display: flex; align-items: center;
    padding: 0 20px; gap: 12px; border-bottom: 1px solid var(--border-color);
}
.sidebar-header i {
    font-size: 24px;
    background: linear-gradient(135deg, #833ab4, #fd1d1d, #fcb045);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.sidebar-header span { font-weight: 700; font-size: 16px; }
.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 16px; border-radius: var(--radius-sm);
    color: var(--text-secondary); font-size: 14px; font-weight: 500;
    transition: var(--transition); margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: rgba(79,140,255,0.12); color: var(--accent-blue); }
.nav-item i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--border-color); }
.btn-logout {
    display: flex; align-items: center; gap: 12px;
    width: 100%; padding: 10px 16px; background: none; border: none;
    color: var(--text-secondary); font-size: 14px; cursor: pointer;
    border-radius: var(--radius-sm); transition: var(--transition);
}
.btn-logout:hover { background: rgba(248,113,113,0.12); color: var(--accent-red); }

/* Main Content */
.main-content {
    flex: 1; margin-left: var(--sidebar-width); transition: var(--transition);
}
.top-bar {
    height: var(--topbar-height); display: flex; align-items: center;
    padding: 0 24px; gap: 16px; background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 50;
}
.top-bar h2 { font-size: 18px; font-weight: 600; flex: 1; }
.top-bar-right { display: flex; align-items: center; gap: 12px; }
.btn-menu { display: none; background: none; border: none; color: var(--text-primary); font-size: 20px; cursor: pointer; }
.status-badge {
    display: flex; align-items: center; gap: 6px;
    padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 500;
}
.status-badge.online { background: rgba(52,211,153,0.12); color: var(--accent-green); }
.status-badge.online i { font-size: 8px; }

.pages-container { padding: 24px; }
.page { display: none; }
.page.active { display: block; }

/* ========== Stats Grid ========== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); padding: 20px;
    display: flex; align-items: center; gap: 16px;
    transition: var(--transition);
}
.stat-card:hover { border-color: var(--accent-blue); transform: translateY(-2px); }
.stat-icon {
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.stat-icon.blue { background: rgba(79,140,255,0.12); color: var(--accent-blue); }
.stat-icon.green { background: rgba(52,211,153,0.12); color: var(--accent-green); }
.stat-icon.purple { background: rgba(167,139,250,0.12); color: var(--accent-purple); }
.stat-icon.orange { background: rgba(251,146,60,0.12); color: var(--accent-orange); }
.stat-icon.cyan { background: rgba(34,211,238,0.12); color: var(--accent-cyan); }
.stat-icon.red { background: rgba(248,113,113,0.12); color: var(--accent-red); }
.stat-info { display: flex; flex-direction: column; }
.stat-value { font-size: 24px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* ========== Cards ========== */
.card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); overflow: hidden;
}
.card-header {
    padding: 16px 20px; border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: space-between;
}
.card-header h3 { font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.card-body { padding: 16px 20px; }
.content-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 16px; }

/* ========== Tables ========== */
.table { width: 100%; border-collapse: collapse; }
.table th {
    text-align: left; padding: 10px 12px; font-size: 12px;
    font-weight: 600; color: var(--text-secondary); text-transform: uppercase;
    letter-spacing: 0.5px; border-bottom: 1px solid var(--border-color);
}
.table td {
    padding: 10px 12px; font-size: 13px; border-bottom: 1px solid var(--border-color);
    max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.table tr:hover td { background: var(--bg-hover); }
.table .password-cell { font-family: monospace; }

/* ========== Page Actions ========== */
.page-actions {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px; flex-wrap: wrap; gap: 12px;
}
.search-box {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); padding: 0 12px;
}
.search-box i { color: var(--text-muted); }
.search-box input {
    background: none; border: none; color: var(--text-primary);
    padding: 8px 0; font-size: 14px; width: 250px;
}
.search-box input:focus { outline: none; }
.action-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-bar { display: flex; gap: 8px; }

/* ========== Tabs ========== */
.tabs { display: flex; gap: 4px; margin-bottom: 16px; }
.tab {
    padding: 8px 16px; background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); color: var(--text-secondary);
    font-size: 13px; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.tab:hover { color: var(--text-primary); }
.tab.active { background: var(--accent-blue); color: #fff; border-color: var(--accent-blue); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ========== Badges ========== */
.badge {
    display: inline-flex; align-items: center; padding: 4px 10px;
    border-radius: 20px; font-size: 12px; font-weight: 500;
}
.badge-green { background: rgba(52,211,153,0.12); color: var(--accent-green); }
.badge-yellow { background: rgba(251,191,36,0.12); color: var(--accent-yellow); }
.badge-red { background: rgba(248,113,113,0.12); color: var(--accent-red); }
.badge-blue { background: rgba(79,140,255,0.12); color: var(--accent-blue); }
.badge-purple { background: rgba(167,139,250,0.12); color: var(--accent-purple); }

.email-stats-bar { display: flex; gap: 8px; }

/* ========== Devices Grid ========== */
.devices-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.device-card {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius); padding: 20px; transition: var(--transition);
}
.device-card:hover { border-color: var(--accent-blue); }
.device-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.device-card-header i { font-size: 28px; color: var(--accent-purple); }
.device-card-header .device-name { font-weight: 600; font-size: 15px; }
.device-card-header .device-id { font-size: 12px; color: var(--text-muted); }
.device-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.device-stat { text-align: center; padding: 8px; background: var(--bg-primary); border-radius: var(--radius-sm); }
.device-stat-value { font-size: 18px; font-weight: 700; }
.device-stat-label { font-size: 11px; color: var(--text-secondary); }
.device-status { display: flex; align-items: center; gap: 6px; margin-top: 12px; font-size: 13px; }
.device-status .dot { width: 8px; height: 8px; border-radius: 50%; }
.device-status .dot.online { background: var(--accent-green); }
.device-status .dot.offline { background: var(--accent-red); }
.device-status .dot.busy { background: var(--accent-yellow); }

/* ========== Logs ========== */
.logs-list, .logs-container { max-height: 400px; overflow-y: auto; }
.log-entry {
    display: flex; gap: 12px; padding: 8px 12px;
    border-bottom: 1px solid var(--border-color); font-size: 13px;
    align-items: flex-start;
}
.log-entry:hover { background: var(--bg-hover); }
.log-time { color: var(--text-muted); font-size: 11px; white-space: nowrap; font-family: monospace; }
.log-level {
    padding: 2px 8px; border-radius: 4px; font-size: 11px;
    font-weight: 600; text-transform: uppercase; white-space: nowrap;
}
.log-level.info { background: rgba(79,140,255,0.12); color: var(--accent-blue); }
.log-level.success { background: rgba(52,211,153,0.12); color: var(--accent-green); }
.log-level.warning { background: rgba(251,191,36,0.12); color: var(--accent-yellow); }
.log-level.error { background: rgba(248,113,113,0.12); color: var(--accent-red); }
.log-device { color: var(--accent-purple); font-weight: 500; white-space: nowrap; }
.log-message { flex: 1; color: var(--text-primary); }

/* ========== Pagination ========== */
.pagination { display: flex; justify-content: center; gap: 4px; margin-top: 16px; }
.pagination button {
    padding: 6px 12px; background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); color: var(--text-secondary); font-size: 13px; cursor: pointer;
}
.pagination button:hover { background: var(--bg-hover); color: var(--text-primary); }
.pagination button.active { background: var(--accent-blue); color: #fff; border-color: var(--accent-blue); }

/* ========== Modal ========== */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6); display: flex; align-items: center;
    justify-content: center; z-index: 1000;
}
.modal {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); width: 90%; max-width: 500px;
    box-shadow: var(--shadow);
}
.modal-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 20px; border-bottom: 1px solid var(--border-color);
}
.modal-body { padding: 20px; }

/* ========== Toast ========== */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast {
    padding: 12px 20px; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500; min-width: 280px;
    animation: slideIn 0.3s ease;
    display: flex; align-items: center; gap: 8px;
}
.toast.success { background: var(--accent-green); color: #000; }
.toast.error { background: var(--accent-red); color: #fff; }
.toast.info { background: var(--accent-blue); color: #fff; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ========== Settings ========== */
.settings-section { margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border-color); }
.settings-section h4 { font-size: 15px; font-weight: 600; margin-bottom: 16px; color: var(--accent-blue); }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .btn-menu { display: block; }
    .content-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .page-actions { flex-direction: column; }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }