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

:root {
    --bg-page:      #0d0d0f;
    --bg-card:      #17181c;
    --bg-input:     #1e2028;
    --bg-hover:     #22242c;
    --border:       #2a2d38;
    --border-light: #353847;

    --text-primary:   #edf0f7;
    --text-secondary: #8891a8;
    --text-muted:     #5a6278;

    --accent:       #6366f1;
    --accent-light: #818cf8;
    --accent-dim:   rgba(99, 102, 241, 0.15);

    --green:        #22c55e;
    --green-dim:    rgba(34, 197, 94, 0.15);
    --red:          #ef4444;
    --red-dim:      rgba(239, 68, 68, 0.15);
    --yellow:       #f59e0b;
    --yellow-dim:   rgba(245, 158, 11, 0.15);
    --blue:         #3b82f6;
    --blue-dim:     rgba(59, 130, 246, 0.15);

    --radius-sm: 6px;
    --radius:    10px;
    --radius-lg: 16px;

    --shadow: 0 4px 24px rgba(0,0,0,0.4);

    --sidebar-width: 220px;
    --topbar-height: 60px;
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-light);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    font-weight: 600;
    line-height: 1.3;
}

/* ─── Layout ─────────────────────────────────────────────── */

.app-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-brand {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-brand .logo {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.sidebar-brand .brand-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-brand .brand-sub {
    font-size: 11px;
    color: var(--text-muted);
}

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    overflow-y: auto;
}

.nav-section-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 8px 10px 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-item.active {
    background: var(--accent-dim);
    color: var(--accent-light);
}

.nav-item .icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 16px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.user-role {
    font-size: 11px;
    color: var(--text-muted);
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    height: var(--topbar-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-title {
    font-size: 17px;
    font-weight: 600;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-content {
    padding: 28px;
    flex: 1;
}

/* ─── Auth Layout ─────────────────────────────────────────── */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(ellipse 600px 500px at 20% 40%, rgba(99,102,241,0.12) 0%, transparent 70%),
        var(--bg-page);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow);
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
}

.auth-logo .logo-icon {
    width: 44px;
    height: 44px;
    background: var(--accent);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.auth-logo .logo-text {
    font-size: 20px;
    font-weight: 700;
}

.auth-logo .logo-sub {
    font-size: 12px;
    color: var(--text-muted);
}

.auth-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 28px;
}

.auth-tab {
    flex: 1;
    padding: 8px;
    text-align: center;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s;
    border: none;
    background: none;
}

.auth-tab.active {
    background: var(--bg-card);
    color: var(--text-primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}