@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

:root {
    --bg: #0f0f1a;
    --bg-sidebar: #0a0a14;
    --bg-card: rgba(26, 26, 46, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --bg-input: rgba(255, 255, 255, 0.06);
    --bg-row: rgba(255, 255, 255, 0.02);
    --bg-row-hover: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);
    --text: #f0f0f5;
    --text-sec: #9ca3af;
    --text-muted: #6b7280;
    --accent: #a855f7;
    --accent-glow: rgba(168, 85, 247, 0.25);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --danger-border: rgba(239, 68, 68, 0.2);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --info-bg: rgba(168, 85, 247, 0.1);
    --radius: 8px;
    --radius-lg: 14px;
    --sidebar-w: 240px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}

/* ===== LOGIN ===== */
#admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(168,85,247,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(108,92,231,0.06) 0%, transparent 50%);
}

.login-card {
    background: rgba(26,26,46,0.75);
    backdrop-filter: blur(24px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.4), 0 0 40px rgba(168,85,247,0.1);
    animation: fadeUp 0.4s ease-out;
}

.login-icon {
    font-size: 2rem;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #6c5ce7, #a855f7);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: 0 4px 20px rgba(168,85,247,0.3);
}

.login-card h1 {
    font-size: 1.6rem;
    font-weight: 700;
    text-align: center;
    background: linear-gradient(135deg, #f0f0f5, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.login-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 1.75rem;
}

.login-card input {
    width: 100%;
    padding: 0.8rem 1rem;
    margin: 0.4rem 0;
    background: var(--bg-input);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.login-card input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-card input::placeholder { color: var(--text-muted); }

.login-card button {
    width: 100%;
    padding: 0.8rem;
    margin-top: 0.75rem;
    background: linear-gradient(135deg, #6c5ce7, #a855f7);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.login-card button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(168,85,247,0.35);
}

.login-note {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.5;
}

.login-note a {
    color: var(--accent);
    text-decoration: none;
}

.login-note a:hover {
    text-decoration: underline;
}

.error-msg {
    margin-top: 0.75rem;
    padding: 0.6rem 0.9rem;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    border-radius: var(--radius);
    color: var(--danger);
    font-size: 0.82rem;
    text-align: center;
}

/* ===== DASHBOARD LAYOUT ===== */
#admin-dashboard {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    font-weight: 700;
    font-size: 1rem;
}

.sidebar-brand .brand-shield {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #6c5ce7, #a855f7);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius);
    border: none;
    background: transparent;
    color: var(--text-sec);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: background var(--transition), color var(--transition);
}

.nav-item:hover {
    background: var(--bg-glass);
    color: var(--text);
}

.nav-item.active {
    background: rgba(168,85,247,0.12);
    color: var(--accent);
    font-weight: 600;
}

.nav-item svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-item.active svg {
    opacity: 1;
}

.sidebar-footer {
    padding: 1rem 1.25rem 0;
    border-top: 1px solid var(--border);
}

.admin-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    background: rgba(168,85,247,0.15);
    border: 1px solid rgba(168,85,247,0.3);
    border-radius: 4px;
    color: var(--accent);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 0.35rem;
}

.admin-email-display {
    font-size: 0.78rem;
    color: var(--text-sec);
    margin-bottom: 0.75rem;
    word-break: break-all;
}

.btn-logout {
    width: 100%;
    padding: 0.5rem;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    border-radius: var(--radius);
    color: var(--danger);
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
}

.btn-logout:hover {
    background: rgba(239,68,68,0.18);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.main-content::-webkit-scrollbar { width: 5px; }
.main-content::-webkit-scrollbar-track { background: transparent; }
.main-content::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.08);
    border-radius: 4px;
}

.section-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.section-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.section-header p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* ===== STATS ROW ===== */
.stats-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    min-width: 130px;
    backdrop-filter: blur(12px);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

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

.btn-danger:hover {
    background: rgba(239,68,68,0.18);
    box-shadow: 0 4px 12px rgba(239,68,68,0.15);
}

.btn-warn {
    background: var(--warning-bg);
    border-color: rgba(245,158,11,0.25);
    color: var(--warning);
}

.btn-warn:hover {
    background: rgba(245,158,11,0.18);
}

.btn-success {
    background: var(--success-bg);
    border-color: rgba(34,197,94,0.25);
    color: var(--success);
}

.btn-success:hover {
    background: rgba(34,197,94,0.18);
}

.btn-purple {
    background: var(--info-bg);
    border-color: rgba(168,85,247,0.25);
    color: var(--accent);
}

.btn-purple:hover {
    background: rgba(168,85,247,0.18);
}

.btn-ghost {
    background: var(--bg-glass);
    border-color: var(--border-strong);
    color: var(--text-sec);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.08);
    color: var(--text);
}

.btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* ===== MESSAGES LIST ===== */
.msg-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.msg-row {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-row);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: background var(--transition);
}

.msg-row:hover {
    background: var(--bg-row-hover);
}

.msg-avatar {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6c5ce7, #a855f7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: #fff;
}

.msg-body {
    flex: 1;
    min-width: 0;
}

.msg-meta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.2rem;
    flex-wrap: wrap;
}

.msg-author {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
}

.msg-time {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.msg-content {
    font-size: 0.85rem;
    color: var(--text-sec);
    word-break: break-word;
    white-space: pre-wrap;
}

.attachment-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    color: var(--accent);
    background: var(--info-bg);
    border: 1px solid rgba(168,85,247,0.2);
    border-radius: 4px;
    padding: 0.15rem 0.5rem;
}

.msg-actions {
    flex-shrink: 0;
}

/* ===== USERS TABLE ===== */
.table-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(12px);
}

.users-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.users-table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
}

.users-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

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

.users-table tr:hover td {
    background: var(--bg-row-hover);
}

.user-email {
    font-weight: 500;
    font-size: 0.875rem;
}

.user-uid {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: monospace;
    margin-top: 0.1rem;
}

.td-actions {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.badge-master {
    background: linear-gradient(135deg, rgba(108,92,231,0.25), rgba(168,85,247,0.25));
    color: #c084fc;
    border: 1px solid rgba(168,85,247,0.4);
}

.badge-admin {
    background: rgba(168,85,247,0.12);
    color: var(--accent);
    border: 1px solid rgba(168,85,247,0.25);
}

.badge-user {
    background: var(--bg-glass);
    color: var(--text-muted);
    border: 1px solid var(--border-strong);
}

.badge-active {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(34,197,94,0.25);
}

.badge-suspended {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(245,158,11,0.25);
}

/* ===== EMPTY STATE ===== */
.empty {
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.empty-icon { font-size: 2rem; margin-bottom: 0.5rem; }

/* ===== CONFIRM DIALOG ===== */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.15s ease;
}

.dialog {
    background: #1a1a2e;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    max-width: 380px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.dialog h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.dialog p {
    font-size: 0.875rem;
    color: var(--text-sec);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.dialog-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.hidden { display: none !important; }