:root {
    --accent:        #7c3aed;
    --accent-hover:  #6d28d9;
    --accent-light:  rgba(124,58,237,0.15);
    --sidebar-bg:    #18181f;
    --sidebar-width: 240px;
    --main-bg:       #0f0f14;
    --card-bg:       #1e1e2a;
    --card-border:   #2a2a3a;
    --text-primary:  #f1f0f5;
    --text-muted:    #9ca3af;
    --input-bg:      #252535;
    --input-border:  #3a3a4a;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }

.vsee-body {
    background: var(--main-bg);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.9375rem;
}

.vsee-shell { display: flex; min-height: 100vh; }

/* Sidebar */
.vsee-sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--card-border);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.vsee-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--card-border);
    padding: 16px;
}
.vsee-brand-icon { color: var(--accent); font-size: 1.4rem; }
.vsee-brand-name { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); }
.vsee-nav-section {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    padding: 4px 12px;
}
.vsee-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    color: var(--text-muted);
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    margin-bottom: 2px;
}
.vsee-nav-link:hover { background: var(--accent-light); color: var(--text-primary); }
.vsee-nav-link.active { background: var(--accent-light); color: var(--accent); font-weight: 600; }
.vsee-nav-icon { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; }

.vsee-user-pill {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.85rem;
}
.vsee-user-name { color: var(--text-primary); font-weight: 500; }
.vsee-badge-admin { background: var(--accent); font-size: 0.65rem; padding: 2px 6px; border-radius: 4px; }
.vsee-logout-btn {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    border-radius: 8px;
    padding: 7px 12px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
    width: 100%;
}
.vsee-logout-btn:hover { border-color: var(--accent); color: var(--accent); }
.vsee-sidebar-footer { padding: 0 12px 12px; }

/* Main */
.vsee-main { flex: 1; padding: 32px 36px; min-width: 0; }
.vsee-page-header { margin-bottom: 28px; }
.vsee-page-title { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin: 0 0 4px; }
.vsee-page-subtitle { color: var(--text-muted); font-size: 0.875rem; margin: 0; }

/* Cards */
.vsee-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    transition: border-color 0.2s;
}
.vsee-card:hover { border-color: var(--accent); }
.vsee-card-title { font-size: 1rem; font-weight: 600; color: var(--text-primary); margin: 0 0 4px; }
.vsee-card-sub { font-size: 0.8rem; color: var(--text-muted); margin: 0 0 14px; font-family: monospace; }

/* Badges */
.vsee-badge-ok {
    background: rgba(22,163,74,0.15);
    color: #4ade80;
    border: 1px solid rgba(22,163,74,0.3);
    border-radius: 6px;
    padding: 3px 9px;
    font-size: 0.75rem;
    font-weight: 600;
}
.vsee-badge-update {
    background: var(--accent-light);
    color: #c4b5fd;
    border: 1px solid rgba(124,58,237,0.35);
    border-radius: 6px;
    padding: 3px 9px;
    font-size: 0.75rem;
    font-weight: 600;
    animation: pulse-border 2s infinite;
}
@keyframes pulse-border {
    0%, 100% { border-color: rgba(124,58,237,0.35); }
    50%       { border-color: rgba(124,58,237,0.8); }
}

/* Buttons */
.vsee-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    border: none;
    transition: background 0.15s, transform 0.1s;
}
.vsee-btn:active { transform: scale(0.97); }
.vsee-btn-primary { background: var(--accent); color: #fff; }
.vsee-btn-primary:hover { background: var(--accent-hover); color: #fff; }
.vsee-btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--card-border); }
.vsee-btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.vsee-btn-danger { background: transparent; color: #f87171; border: 1px solid rgba(220,38,38,0.3); }
.vsee-btn-danger:hover { background: rgba(220,38,38,0.1); }
.vsee-btn-sm { padding: 5px 12px; font-size: 0.8rem; }

/* Forms */
.vsee-form-group { margin-bottom: 18px; }
.vsee-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.vsee-input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 10px 14px;
    font-size: 0.9rem;
    transition: border-color 0.15s;
    outline: none;
}
.vsee-input:focus { border-color: var(--accent); }
.vsee-input::placeholder { color: var(--text-muted); }
.vsee-select {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 10px 14px;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
}
.vsee-select:focus { border-color: var(--accent); }
.vsee-select option { background: var(--input-bg); }
.vsee-check { accent-color: var(--accent); }
.field-validation-error { color: #f87171; font-size: 0.8rem; }
.input-validation-error { border-color: #f87171 !important; }

/* Table */
.vsee-table { width: 100%; border-collapse: collapse; }
.vsee-table th {
    text-align: left;
    padding: 10px 14px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--card-border);
}
.vsee-table td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(42,42,58,0.5);
    vertical-align: middle;
    color: var(--text-primary);
}
.vsee-table tr:hover td { background: var(--accent-light); }

/* Progress */
.vsee-progress-track {
    background: var(--card-border);
    border-radius: 999px;
    height: 10px;
    overflow: hidden;
}
.vsee-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #a78bfa);
    border-radius: 999px;
    transition: width 0.4s ease;
}

/* Auth */
.vsee-auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--main-bg);
    padding: 24px;
}
.vsee-auth-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 36px 40px;
    width: 100%;
    max-width: 420px;
}
.vsee-auth-logo { text-align: center; margin-bottom: 28px; }
.vsee-auth-logo-icon { color: var(--accent); font-size: 2.5rem; }
.vsee-auth-logo-name { display: block; font-size: 1.3rem; font-weight: 700; color: var(--text-primary); margin-top: 6px; }

/* Alerts */
.vsee-alert-success { background: rgba(22,163,74,0.1); border: 1px solid rgba(22,163,74,0.3); color: #4ade80; border-radius: 8px; }
.vsee-alert-danger  { background: rgba(220,38,38,0.1);  border: 1px solid rgba(220,38,38,0.3);  color: #f87171; border-radius: 8px; }
.vsee-alert-warning { background: rgba(217,119,6,0.1);  border: 1px solid rgba(217,119,6,0.3);  color: #fbbf24; border-radius: 8px; }

/* Misc */
.vsee-mono { font-family: 'Consolas','Courier New',monospace; font-size: 0.8rem; color: #c4b5fd; background: rgba(124,58,237,0.08); padding: 2px 6px; border-radius: 4px; }
.text-muted-vsee { color: var(--text-muted) !important; }
.divider { border-color: var(--card-border); }

/* ── Mobile topbar & hamburger ─────────────────────────────────────── */
.vsee-topbar {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 52px;
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--card-border);
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    z-index: 200;
}
.vsee-topbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}
.vsee-hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex-shrink: 0;
}
.vsee-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
}
/* Animate to X when open */
.vsee-sidebar-open .vsee-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.vsee-sidebar-open .vsee-hamburger span:nth-child(2) { opacity: 0; }
.vsee-sidebar-open .vsee-hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Overlay behind sidebar */
.vsee-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 149;
}
.vsee-sidebar-open .vsee-overlay { display: block; }

/* ── Responsive breakpoint ─────────────────────────────────────────── */
@media (max-width: 767px) {
    .vsee-topbar { display: flex; }

    .vsee-shell { display: block; }

    .vsee-sidebar {
        position: fixed;
        top: 0; left: 0;
        height: 100vh;
        z-index: 150;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        width: 260px;
    }
    .vsee-sidebar-open .vsee-sidebar { transform: translateX(0); }

    .vsee-main {
        padding: 80px 16px 24px; /* top pad clears the topbar */
    }

    /* Stack page headers vertically */
    .vsee-page-header.d-flex { flex-direction: column; align-items: flex-start !important; gap: 12px; }

    /* Make tables scroll horizontally */
    .vsee-card.p-0 { overflow-x: auto; }
    .vsee-table { min-width: 540px; }
}