:root {
    --bg:           #1e1e1e;
    --bg-panel:     #252526;
    --bg-card:      #2d2d30;
    --bg-hover:     #2a2d2e;
    --bg-input:     #3c3c3c;
    --border:       #3c3c3c;
    --border-hi:    #555;
    --text:         #d4d4d4;
    --text-muted:   #858585;
    --text-dim:     #5a5a5a;
    --accent:       #4fc3f7;
    --accent-hover: #81d4fa;
    --green:        #4ec9b0;
    --red:          #f48771;
    --orange:       #ce9178;
    --yellow:       #dcdcaa;
    --mono:         'SF Mono', 'Cascadia Code', Consolas, 'Courier New', monospace;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Top navigation bar — shared across all pages */
.topbar {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    padding: 0 1rem;
    height: 48px;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-shrink: 0;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 0.75rem;
    color: var(--accent);
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-decoration: none;
    flex-shrink: 0;
}

.topbar-brand:hover { text-decoration: none; color: var(--accent); }
.topbar-brand svg { flex-shrink: 0; }

.topbar-nav {
    display: flex;
    align-items: center;
    gap: 2px;
}

.topbar-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    height: 32px;
    border-radius: 3px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.82rem;
    border: 1px solid transparent;
    background: none;
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
}

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

.topbar-item.active {
    color: var(--accent);
    background: var(--bg-card);
    border-color: var(--border);
}

.topbar-item svg { width: 16px; height: 16px; flex-shrink: 0; }

.topbar-user {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
    flex-shrink: 0;
}

/* Page header — IDE tab/breadcrumb bar */
.page-header {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    position: sticky;
    top: 48px;
    z-index: 10;
}

.page-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.page-title svg {
    color: var(--accent);
    flex-shrink: 0;
}

.page-header-actions {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}

/* Buttons — minimal, launchpad-style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 3px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 400;
    font-family: inherit;
    line-height: 1.5;
    color: var(--text-muted);
    text-decoration: none;
    transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.btn:hover {
    color: var(--text);
    background: var(--bg-hover);
    border-color: var(--border);
    text-decoration: none;
}

.btn-primary { color: var(--accent); }
.btn-primary:hover {
    color: var(--accent);
    background: rgba(79, 195, 247, 0.12);
    border-color: var(--accent);
}

.btn-secondary { color: var(--text-muted); }
.btn-secondary:hover {
    color: var(--text);
    background: var(--bg-hover);
    border-color: var(--border);
}

.btn-large {
    padding: 8px 16px;
    font-size: 0.86rem;
}

/* Cards / Panels */
.card {
    background: var(--bg-card);
    border-radius: 2px;
    padding: 1.25rem;
    border: 1px solid var(--border);
}

/* Section label */
.section-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 1.5rem 0 0.6rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0 0.4rem;
    height: 22px;
    border-radius: 2px;
    font-size: 0.7rem;
    font-family: var(--mono);
    white-space: nowrap;
}

.badge-success {
    background: rgba(78, 201, 176, 0.12);
    color: var(--green);
    border: 1px solid rgba(78, 201, 176, 0.25);
}

.badge-warning {
    background: rgba(206, 145, 120, 0.12);
    color: var(--orange);
    border: 1px solid rgba(206, 145, 120, 0.25);
}

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

/* Mobile */
@media (max-width: 600px) {
    .container { padding: 1rem; }

    .topbar { padding: 0 8px; gap: 2px; }
    .topbar-brand { margin-right: 2px; }
    .topbar-nav { gap: 0; }
    .topbar-item { padding: 6px 10px; gap: 0; }
    .topbar-item .link-label { display: none; }

    .page-header {
        height: auto;
        min-height: 44px;
        padding: 6px 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .btn-large { padding: 10px 14px; font-size: 0.85rem; }
}