/* ========================================
   Trường Thịnh Media — Admin Panel CSS
   Premium dark theme matching Electron app
   ======================================== */

:root {
    --bg-void: #050505;
    --bg-obsidian: #0a0a0a;
    --bg-card: rgba(255,255,255,0.04);
    --bg-card-hover: rgba(255,255,255,0.07);
    --bg-input: rgba(0,0,0,0.5);
    --border: rgba(255,255,255,0.08);
    --border-focus: rgba(255,59,48,0.5);
    --neon-red: #ff3b30;
    --neon-ruby: #e0115f;
    --neon-green: #39ff14;
    --neon-cyan: #22d3ee;
    --neon-amber: #f59e0b;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --shadow-glow-red: 0 0 30px rgba(255,59,48,0.15);
    --shadow-card: 0 10px 40px rgba(0,0,0,0.3);
}

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

body {
    font-family: var(--font);
    background: var(--bg-void);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Background Mesh */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-size: 50px 50px;
    background-image:
        linear-gradient(to right, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.02) 1px, transparent 1px);
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    top: -200px;
    left: -200px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255,59,48,0.06) 0%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
}

/* Screens */
.screen { display: none; position: relative; z-index: 1; }
.screen.active { display: block; }

/* ── Login Screen ── */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-logo {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--neon-red), var(--neon-ruby));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    color: white;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-glow-red);
}

.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

#login-form {
    width: 100%;
    max-width: 380px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
}

/* ── Form Elements ── */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font);
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--border-focus);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.form-row {
    margin-bottom: 1.25rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--neon-red);
    width: 16px;
    height: 16px;
}

.error-msg {
    background: rgba(255,59,48,0.1);
    border: 1px solid rgba(255,59,48,0.2);
    color: #ff6b6b;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.hidden { display: none !important; }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    font-family: var(--font);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--neon-red);
    color: #000;
    box-shadow: var(--shadow-glow-red);
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-card-hover); color: white; }

.btn-danger {
    background: rgba(255,59,48,0.15);
    color: var(--neon-red);
    border: 1px solid rgba(255,59,48,0.2);
}
.btn-danger:hover { background: rgba(255,59,48,0.25); }

.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.8rem; }
.btn-full { width: 100%; }

.btn-loader { animation: spin 1s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.35rem;
    border-radius: 6px;
    font-size: 1rem;
    transition: all 0.15s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover { color: white; background: var(--bg-card-hover); }
.btn-icon.danger:hover { color: var(--neon-red); background: rgba(255,59,48,0.1); }

/* ── Top Bar ── */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    background: rgba(5,5,5,0.8);
    backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-small {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--neon-red), var(--neon-ruby));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 900;
    color: white;
}

.brand-name {
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.badge {
    padding: 0.15rem 0.5rem;
    border-radius: 50px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-admin { background: var(--neon-red); color: #000; }

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-email {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Main Content ── */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* ── Stats Grid ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: all 0.2s;
}
.stat-card:hover { border-color: rgba(255,255,255,0.12); }

.stat-value {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 0.35rem;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-green .stat-value { color: var(--neon-green); }
.stat-cyan .stat-value { color: var(--neon-cyan); }
.stat-amber .stat-value { color: var(--neon-amber); }
.stat-red .stat-value { color: var(--neon-red); }

/* ── Section Header ── */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 1.15rem;
    font-weight: 700;
}

/* ── Tables ── */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    vertical-align: middle;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem !important;
    font-style: italic;
}

/* Status tags */
.tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
}
.tag-active { background: rgba(57,255,20,0.1); color: var(--neon-green); border: 1px solid rgba(57,255,20,0.2); }
.tag-inactive { background: rgba(255,59,48,0.1); color: var(--neon-red); border: 1px solid rgba(255,59,48,0.2); }
.tag-online { background: rgba(34,211,238,0.1); color: var(--neon-cyan); border: 1px solid rgba(34,211,238,0.2); }
.tag-offline { background: rgba(107,114,128,0.1); color: var(--text-muted); border: 1px solid rgba(107,114,128,0.2); }

.api-key-cell {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.actions-cell {
    display: flex;
    gap: 0.25rem;
    white-space: nowrap;
}

.text-muted { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1rem; }

/* ── Modals ── */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-obsidian);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 80px rgba(0,0,0,0.5);
    animation: modalIn 0.2s ease;
}

.modal-sm { max-width: 380px; }

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: color 0.15s;
}
.modal-close:hover { color: white; }

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #333; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .main-content { padding: 1rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .topbar { padding: 0.75rem 1rem; }
    .brand-name { display: none; }
}