/* ============================================================
   COMPONENTS: sidebar, topbar, buttons, cards, forms, stats,
   toasts, modals, tables, badges, empty states.
   ============================================================ */

/* ── Sidebar ── */
.sidebar {
    width: 248px;
    background: var(--card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 18px 14px;
    gap: 6px;
}
.sidebar-brand { font-weight: 800; font-size: 18px; color: var(--primary); padding: 8px 12px 14px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-link {
    color: var(--text); padding: 10px 12px; border-radius: 10px;
    font-weight: 500; font-size: 14px; transition: background .15s;
}
.nav-link:hover { background: var(--surface-2); text-decoration: none; }
.nav-link.active { background: color-mix(in srgb, var(--primary) 14%, transparent); color: var(--primary); }
.sidebar-footer { color: var(--muted); font-size: 12px; padding: 10px 12px; border-top: 1px solid var(--border); }

/* ── Topbar ── */
.topbar {
    height: 62px; background: var(--card); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; gap: 14px; padding: 0 20px;
    position: sticky; top: 0; z-index: 20;
}
.topbar-title { font-weight: 600; }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn {
    background: transparent; border: 1px solid var(--border); color: var(--text);
    width: 38px; height: 38px; border-radius: 10px; cursor: pointer; font-size: 16px;
}
.icon-btn:hover { background: var(--surface-2); }
#sidebarToggle { display: none; }
.user-menu { display: flex; align-items: center; gap: 10px; }
.user-name { font-size: 14px; font-weight: 600; }
.theme-select {
    background: var(--card); color: var(--text); border: 1px solid var(--border);
    border-radius: 10px; padding: 8px 10px; font-size: 13px; cursor: pointer;
}

/* ── Buttons ── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    border: 1px solid transparent; border-radius: 10px; padding: 10px 18px;
    font-size: 14px; font-weight: 600; cursor: pointer; transition: filter .15s, background .15s;
    text-decoration: none; line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-danger { background: var(--error); color: #fff; }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 12px; font-size: 13px; }
.btn .spinner { display: none; }
.btn.is-loading .spinner { display: inline-block; }
.btn.is-loading .btn-label { opacity: .7; }

.spinner {
    width: 14px; height: 14px; border-radius: 50%;
    border: 2px solid rgba(255,255,255,.5); border-top-color: #fff;
    animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Cards ── */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow); margin-bottom: 20px; }
.card-head { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.card-head h2 { margin: 0; font-size: 16px; }
.card-body { padding: 20px; }

/* ── Forms ── */
.form .field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field input, .field select, .field textarea {
    width: 100%; background: var(--card); color: var(--text);
    border: 1px solid var(--border); border-radius: 10px; padding: 11px 13px; font-size: 14px;
    transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent);
}
.field.has-error input, .field.has-error select { border-color: var(--error); }
.field-error { display: block; color: var(--error); font-size: 12px; margin-top: 5px; min-height: 14px; }

/* segmented control */
.seg { display: flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 4px; margin-bottom: 18px; }
.seg-item { flex: 1; text-align: center; font-size: 13px; font-weight: 600; padding: 8px; border-radius: 8px; cursor: pointer; }
.seg-item input { display: none; }
.seg-item:has(input:checked) { background: var(--card); color: var(--primary); box-shadow: var(--shadow); }

/* ── Stat grid ── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin-bottom: 22px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 6px; }
.stat-label { color: var(--muted); font-size: 13px; font-weight: 600; }
.stat-value { font-size: 30px; font-weight: 800; }
.stat-link { font-size: 13px; font-weight: 600; }

/* ── Tables ── */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }

/* ── Badges ── */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-success { background: color-mix(in srgb, var(--success) 18%, transparent); color: var(--success); }
.badge-warning { background: color-mix(in srgb, var(--warning) 20%, transparent); color: var(--warning); }
.badge-error { background: color-mix(in srgb, var(--error) 18%, transparent); color: var(--error); }

/* ── Empty state ── */
.empty-state { text-align: center; padding: 32px 16px; color: var(--muted); }
.empty-state p { margin: 0 0 16px; }
.checklist { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.checklist li { padding-left: 4px; }

/* ── Toasts ── */
.toast-stack { position: fixed; top: 18px; right: 18px; z-index: 200; display: flex; flex-direction: column; gap: 10px; }
.toast {
    background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--primary);
    border-radius: 10px; padding: 12px 16px; box-shadow: var(--shadow); min-width: 240px; max-width: 360px;
    font-size: 14px; animation: toastIn .2s ease;
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--error); }
.toast.warning { border-left-color: var(--warning); }
@keyframes toastIn { from { opacity: 0; transform: translateX(12px); } to { opacity: 1; transform: none; } }

/* ── Modal ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(2,8,23,.5); display: flex; align-items: center; justify-content: center; z-index: 150; padding: 20px; }
.modal { background: var(--card); border: 1px solid var(--border); border-radius: 16px; max-width: 480px; width: 100%; box-shadow: var(--shadow); }
.modal-head { padding: 18px 20px; border-bottom: 1px solid var(--border); font-weight: 700; }
.modal-body { padding: 20px; }
.modal-foot { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ── App footer (Powered by) ── */
.app-footer {
    text-align: center;
    padding: 14px 20px;
    color: var(--muted);
    font-size: 12px;
    border-top: 1px solid var(--border);
    background: var(--card);
}
.app-footer a { color: var(--muted); font-weight: 600; text-decoration: none; }
.app-footer a:hover { color: var(--primary); text-decoration: underline; }

@media (max-width: 880px) {
    #sidebarToggle { display: inline-flex; }
}