/* ============================================================
   InterHeat v2 — Base + Components
   Depends on theme.css (load theme.css first).
   ============================================================ */

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--text-strong);
    line-height: 1.6;
    min-height: 100vh;
    background:
        radial-gradient(900px 460px at -8% -18%, rgba(11, 94, 215, 0.10), transparent 70%),
        radial-gradient(760px 420px at 105% -15%, rgba(15, 118, 110, 0.10), transparent 70%),
        linear-gradient(180deg, #f7fbff 0%, var(--bg-app) 100%);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-strong);
    letter-spacing: -0.01em;
}
h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h2 { font-size: clamp(1.35rem, 2.4vw, 1.75rem); }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.4rem); }
h4 { font-size: 1.05rem; }

p { color: var(--text); }
a { color: var(--color-primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--color-primary-dark); }

.text-muted { color: var(--text-muted); }
.mono { font-family: var(--font-mono); }

/* ── App shell ─────────────────────────────────────────── */
.app-shell { max-width: var(--shell-max); margin: 0 auto; padding: var(--space-6) var(--space-5); }

.page-head {
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-5);
}
.page-head h1 { margin-bottom: var(--space-1); }
.page-head p { margin: 0; color: var(--text-muted); }
.page-head .actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ── Top navigation (single source: partials/nav.php) ──── */
.navbar {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--border-strong);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(8px);
    position: sticky; top: 0; z-index: var(--z-nav);
}
.navbar-inner {
    max-width: var(--shell-max); margin: 0 auto;
    display: flex; align-items: center; gap: var(--space-4);
    padding: 0 var(--space-5); min-height: var(--nav-height);
}
.nav-brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.nav-brand img { display: block; height: 34px; width: auto; max-width: 190px; object-fit: contain; }

.nav-menu {
    display: flex; list-style: none; gap: var(--space-1);
    align-items: center; flex-wrap: wrap; flex: 1;
}
.nav-menu a {
    display: inline-block; color: var(--text-strong);
    font-size: 0.92rem; font-weight: 600;
    border-radius: var(--radius-pill);
    padding: 0.44rem 0.82rem; border: 1px solid transparent;
    transition: all 0.2s ease;
}
.nav-menu a:hover { background: rgba(11, 94, 215, 0.08); color: var(--color-primary-dark); }
.nav-menu a.active {
    color: var(--color-primary-dark);
    background: rgba(11, 94, 215, 0.10);
    border-color: rgba(11, 94, 215, 0.22);
}
.nav-spacer { flex: 1; }
.nav-user { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.nav-user .whoami { font-size: 0.82rem; color: var(--text-muted); }
.nav-user .whoami strong { color: var(--text-strong); }
.role-badge {
    font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
    padding: 0.15rem 0.55rem; border-radius: var(--radius-pill);
    background: var(--bg-inset); color: var(--text);
}

/* mobile nav toggle */
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.4rem 0.6rem; cursor: pointer; }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
    padding: 0.62rem 1.1rem; border: 1px solid transparent; border-radius: var(--radius-md);
    font-family: inherit; font-size: 0.92rem; font-weight: 700; letter-spacing: 0.01em;
    cursor: pointer; text-align: center; text-decoration: none; line-height: 1.2;
    transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-primary { background: linear-gradient(130deg, #0b5ed7 0%, #1f4fb7 100%); color: #fff; border-color: #0a4eb1; box-shadow: 0 7px 18px rgba(11, 94, 215, 0.24); }
.btn-secondary { background: linear-gradient(130deg, #0f766e 0%, #0d5f59 100%); color: #fff; border-color: #0e5f58; box-shadow: 0 7px 16px rgba(15, 118, 110, 0.20); }
.btn-danger { background: linear-gradient(130deg, #dc2626 0%, #b91c1c 100%); color: #fff; border-color: #991b1b; }
.btn-ghost { background: var(--bg-surface); color: var(--text-strong); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary-dark); }
.btn-small { padding: 0.44rem 0.8rem; font-size: 0.8rem; }
.btn-block { width: 100%; }

/* ── Cards / panels ────────────────────────────────────── */
.card, .panel {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.card { padding: var(--space-5); }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-4); }
.card-head h2, .card-head h3 { margin: 0; }

.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ── Stat tiles ────────────────────────────────────────── */
.stat { display: flex; flex-direction: column; gap: 0.2rem; }
.stat .val { font-size: 1.75rem; font-weight: 800; line-height: 1; color: var(--text-strong); font-variant-numeric: tabular-nums; }
.stat .lbl { font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); }
.stat.online .val { color: var(--status-online-fg); }
.stat.stale .val { color: var(--status-stale-fg); }
.stat.offline .val { color: var(--status-offline-fg); }

/* ── Badges / pills ────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; gap: 0.3rem; font-size: 0.75rem; font-weight: 700; padding: 0.2rem 0.6rem; border-radius: var(--radius-pill); background: var(--bg-inset); color: var(--text); }
.badge-online { background: var(--status-online-bg); color: var(--status-online-fg); }
.badge-stale { background: var(--status-stale-bg); color: var(--status-stale-fg); }
.badge-offline { background: var(--status-offline-bg); color: var(--status-offline-fg); }

/* ── Forms ─────────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-4); }
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field.full { grid-column: 1 / -1; }
label { font-weight: 700; font-size: 0.85rem; color: var(--text-strong); }
.form-control, input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="date"], input[type="datetime-local"], select, textarea {
    width: 100%; padding: 0.62rem 0.72rem; border: 1px solid var(--border);
    border-radius: var(--radius-sm); background: var(--bg-subtle);
    font-family: inherit; font-size: 0.92rem; color: var(--text-strong);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
.form-control:focus, input:focus, select:focus, textarea:focus {
    outline: none; border-color: var(--color-primary); box-shadow: var(--focus-ring); background: #fff;
}

/* ── Tables ────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--bg-surface); }
table.data { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.data th, table.data td { padding: 0.72rem 0.9rem; text-align: left; border-bottom: 1px solid var(--border); }
table.data th { background: var(--bg-inset); font-weight: 700; color: var(--text-strong); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.4px; position: sticky; top: 0; }
table.data tbody tr:hover { background: var(--bg-subtle); }
table.data tbody tr:last-child td { border-bottom: none; }

/* ── Toolbar (filters/refresh strip) ───────────────────── */
.toolbar {
    display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3);
    background: var(--bg-surface); border: 1px solid var(--border);
    border-radius: var(--radius-md); padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-5); box-shadow: var(--shadow-sm);
}
.toolbar .spacer { flex: 1; }

/* ── Stepper (guided flows, single-screen) ─────────────── */
.stepper { display: flex; flex-direction: column; gap: var(--space-3); }
.step-item {
    display: grid; grid-template-columns: auto 1fr; gap: var(--space-3);
    align-items: start; padding: var(--space-4);
    border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--bg-subtle);
}
.step-item.active { border-color: var(--color-primary); box-shadow: var(--focus-ring); background: #fff; }
.step-item.done { border-color: var(--status-online-fg); }
.step-num {
    width: 34px; height: 34px; border-radius: 50%; background: var(--brand-gradient);
    color: #fff; font-weight: 800; display: inline-flex; align-items: center; justify-content: center;
}
.step-item.done .step-num { background: var(--status-online-fg); }

/* ── Utilities ─────────────────────────────────────────── */
.flex { display: flex; } .items-center { align-items: center; } .gap-2 { gap: var(--space-2); } .gap-3 { gap: var(--space-3); }
.mt-4 { margin-top: var(--space-4); } .mb-4 { margin-bottom: var(--space-4); } .hidden { display: none !important; }

/* ── Modal ─────────────────────────────────────────────── */
.modal-backdrop {
    position: fixed; inset: 0; z-index: var(--z-modal);
    background: rgba(15, 23, 42, 0.5); backdrop-filter: blur(2px);
    display: flex; align-items: flex-start; justify-content: center;
    padding: var(--space-6) var(--space-4); overflow-y: auto;
}
.modal { width: 100%; max-width: 640px; animation: riseIn 0.25s ease both; }

/* ── Toast ─────────────────────────────────────────────── */#toast-root { position: fixed; right: var(--space-5); bottom: var(--space-5); z-index: var(--z-modal); display: flex; flex-direction: column; gap: var(--space-2); }
.toast { background: var(--bg-dark); color: #fff; padding: 0.7rem 1rem; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); font-size: 0.88rem; animation: toastIn 0.25s ease; }
.toast.success { background: var(--color-success); }
.toast.error { background: var(--color-danger); }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ── Motion ────────────────────────────────────────────── */
@keyframes riseIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.card, .panel, .step-item { animation: riseIn 0.35s ease both; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 1024px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 768px) {
    .app-shell { padding: var(--space-5) var(--space-4); }
    .nav-toggle { display: inline-block; }
    .nav-menu { display: none; width: 100%; flex-direction: column; align-items: stretch; padding: var(--space-3) 0; }
    .navbar.open .nav-menu { display: flex; }
    .navbar-inner { flex-wrap: wrap; padding: var(--space-3) var(--space-4); }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .nav-menu a { text-align: left; }
}

/* ── admin impersonation banner ──────────────────────────────── */
.impersonation-banner {
    position: sticky; top: 0; z-index: calc(var(--z-modal) - 1);
    display: flex; align-items: center; justify-content: center; gap: var(--space-4); flex-wrap: wrap;
    background: repeating-linear-gradient(45deg, #92400e, #92400e 12px, #b45309 12px, #b45309 24px);
    color: #fff; padding: 0.5rem var(--space-4); font-size: 0.9rem; font-weight: 600;
    box-shadow: 0 2px 6px rgba(0,0,0,.2);
}
.impersonation-banner .js-revert { background: #fff; color: #92400e; font-weight: 700; }
.impersonation-banner .js-revert:hover { background: #fde68a; }
.user-actions { display: flex; gap: var(--space-2); justify-content: flex-end; }