/* ---------------------------------------------------------------------
   Design tokens

   Mobile-first, low-bandwidth by design (no CDN, no icon font, no web
   fonts — system-ui only): this app is used on ordinary phones by
   biomedical engineers in the field. Status color is not decoration —
   "Fault" needs to read at a glance.
   --------------------------------------------------------------------- */

:root {
    color-scheme: light dark;

    --fg: #1a1d1c;
    --fg-muted: #5b625f;
    --bg: #ffffff;
    --surface: #f6f7f6;
    --border: #dde1df;

    --accent: #0a7d5c;
    --accent-fg: #ffffff;
    --accent-surface: #e3f3ec;

    --success: #0a7d5c;
    --success-surface: #e3f3ec;
    --warning: #92620a;
    --warning-surface: #fbedd2;
    --danger: #a3271e;
    --danger-surface: #fbe4e1;
    --neutral: #5b625f;
    --neutral-surface: #eceeed;

    --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --radius: 0.5rem;
    --radius-sm: 0.375rem;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --fg: #eef1f0;
        --fg-muted: #9aa39f;
        --bg: #121413;
        --surface: #1a1d1c;
        --border: #2c302e;

        --accent-fg: #08120e;
        --accent-surface: #133327;

        --success-surface: #133327;
        --warning-surface: #3a2a0a;
        --danger-surface: #3a1614;
        --neutral-surface: #232725;

        --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.5);
    }
}

/* ---------------------------------------------------------------------
   Base
   --------------------------------------------------------------------- */

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--fg);
    background: var(--bg);
}

h1, h2, h3 {
    line-height: 1.25;
    margin: 0 0 var(--space-4);
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.125rem; margin-top: var(--space-6); }

p { margin: 0 0 var(--space-4); }

a { color: var(--accent); }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ---------------------------------------------------------------------
   Header / nav
   --------------------------------------------------------------------- */

.site-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border);
}

.site-header .brand {
    font-weight: 700;
    font-size: 1.0625rem;
    text-decoration: none;
    color: var(--fg);
}

.site-header nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    font-size: 0.9375rem;
}

.site-header nav a {
    color: var(--fg-muted);
    text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
    color: var(--fg);
}

.site-header form { margin: 0; }

.site-header .btn { padding: var(--space-2) var(--space-3); font-size: 0.9375rem; }

/* ---------------------------------------------------------------------
   Layout
   --------------------------------------------------------------------- */

main {
    padding: var(--space-5);
    max-width: 40rem;
    margin: 0 auto;
}

.page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: var(--space-5) 0;
}

.back-link {
    display: inline-block;
    margin-top: var(--space-6);
    font-size: 0.9375rem;
    color: var(--fg-muted);
    text-decoration: none;
}

.back-link:hover { color: var(--accent); }

/* ---------------------------------------------------------------------
   Messages
   --------------------------------------------------------------------- */

.messages {
    list-style: none;
    margin: 0 auto;
    padding: var(--space-4) var(--space-5) 0;
    max-width: 40rem;
}

.message {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
    background: var(--neutral-surface);
}

.message.success { background: var(--success-surface); color: var(--success); }
.message.error { background: var(--danger-surface); color: var(--danger); }
.message.warning { background: var(--warning-surface); color: var(--warning); }

/* ---------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------- */

button, input, select, textarea { font: inherit; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    cursor: pointer;
    line-height: 1.2;
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-fg);
}

.btn-primary:hover { opacity: 0.92; }

.btn-secondary {
    background: transparent;
    color: var(--fg);
    border-color: var(--border);
}

.btn-secondary:hover { background: var(--surface); }

/* Bare submit/button elements that aren't explicitly styled (e.g. inside
   third-party allauth forms) still get a sane default. */
main form button[type="submit"]:not([class]) {
    display: inline-flex;
    padding: var(--space-3) var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 600;
    cursor: pointer;
}

/* ---------------------------------------------------------------------
   Cards
   --------------------------------------------------------------------- */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-5);
    margin-bottom: var(--space-4);
}

.card-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.card-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-4) var(--space-5);
    text-decoration: none;
    color: var(--fg);
    transition: border-color 0.1s ease;
}

.card-link:hover,
.card-link:focus-visible {
    border-color: var(--accent);
}

.card-link .card-title { font-weight: 600; }
.card-link .card-meta { color: var(--fg-muted); font-size: 0.875rem; }

.text-muted {
    color: var(--fg-muted);
}

.empty-state {
    color: var(--fg-muted);
    padding: var(--space-3) 0;
}

/* A page whose whole body is just the empty state (e.g. "no devices yet"
   right under the page's primary action) earns the extra breathing room —
   a subsection empty state (e.g. "no faults yet" under a heading) doesn't. */
.empty-state-page {
    padding: var(--space-6) 0;
}

/* ---------------------------------------------------------------------
   Badges (status / severity) — driven directly by model values, e.g.
   class="badge badge-{{ device.status }}", so templates don't need
   per-value conditionals. Neutral is the fallback for anything unstyled.
   --------------------------------------------------------------------- */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem var(--space-3);
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 600;
    background: var(--neutral-surface);
    color: var(--neutral);
    white-space: nowrap;
}

.badge-operational,
.badge-resolved { background: var(--success-surface); color: var(--success); }

.badge-fault,
.badge-safety_emergency { background: var(--danger-surface); color: var(--danger); }

.badge-malfunction,
.badge-total_failure,
.badge-in_progress { background: var(--warning-surface); color: var(--warning); }

.badge-received { background: var(--neutral-surface); color: var(--neutral); }

.badge-overdue { background: var(--danger-surface); color: var(--danger); }
.badge-on_schedule { background: var(--success-surface); color: var(--success); }

/* ---------------------------------------------------------------------
   Key/value fact lists (device detail, fault status)
   --------------------------------------------------------------------- */

.fact-list {
    margin: 0 0 var(--space-4);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-2) var(--space-4);
}

.fact-list dt {
    color: var(--fg-muted);
    font-size: 0.875rem;
}

.fact-list dd {
    margin: 0;
}

/* ---------------------------------------------------------------------
   Forms

   Django's default {{ form.as_p }} output is plain <p><label>…<input>…</p>
   — styled generically here so every form in the app looks consistent
   without hand-rewriting each one's markup.
   --------------------------------------------------------------------- */

form p {
    margin: 0 0 var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

form label {
    font-weight: 600;
    font-size: 0.875rem;
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="number"],
form input[type="url"],
form input[type="tel"],
form select,
form textarea {
    padding: var(--space-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--fg);
    width: 100%;
    max-width: 24rem;
}

form input[type="file"] {
    padding: var(--space-2) 0;
}

form textarea { max-width: none; min-height: 6rem; resize: vertical; }

form input:focus-visible,
form select:focus-visible,
form textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

form .helptext {
    color: var(--fg-muted);
    font-size: 0.8125rem;
    font-weight: 400;
}

form ul.errorlist {
    list-style: none;
    margin: 0 0 var(--space-1);
    padding: 0;
    color: var(--danger);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Radio-choice rows (e.g. picking a clinic) read as tappable cards, not
   bare <input>+label pairs — important on a phone. */
.choice-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin: 0 0 var(--space-5);
    padding: 0;
    list-style: none;
}

.choice-list label {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
}

.choice-list input[type="radio"] { width: 1.125rem; height: 1.125rem; }

.choice-list label:has(input:checked) {
    border-color: var(--accent);
    background: var(--accent-surface);
}

/* ---------------------------------------------------------------------
   QR code
   --------------------------------------------------------------------- */

.qr-code {
    display: block;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-3);
    background: #ffffff;
    width: 10rem;
    height: 10rem;
}

/* ---------------------------------------------------------------------
   Device photo
   --------------------------------------------------------------------- */

.device-photo {
    display: block;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #ffffff;
    max-width: 16rem;
    max-height: 16rem;
    width: auto;
    height: auto;
    margin-bottom: var(--space-4);
}

/* ---------------------------------------------------------------------
   Tracking reference (public fault-status page)
   --------------------------------------------------------------------- */

.tracking-ref {
    display: inline-block;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--border);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.875rem;
}

/* ---------------------------------------------------------------------
   Small screens
   --------------------------------------------------------------------- */

@media (max-width: 30rem) {
    .site-header { padding: var(--space-3) var(--space-4); }
    main { padding: var(--space-4); }
    .fact-list { grid-template-columns: 1fr; gap: var(--space-1); }
    .fact-list dt { margin-top: var(--space-2); }
}