/*
  Siyaxhuma Support Portal — styles.
  Mobile-first, single stylesheet, no build step (Section 10.1: responsive web
  app for desktop + mobile).
*/

:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-alt: #f8fafb;
  --border: #dfe4e8;
  --text: #17242c;
  --text-muted: #5d6f7a;
  --brand: #0f766e;
  --brand-dark: #0b5c56;
  --brand-tint: #e6f4f2;
  --danger: #b42318;
  --danger-tint: #fdeceb;
  --warn: #b54708;
  --warn-tint: #fef4e6;
  --ok: #166534;
  --ok-tint: #e8f5ec;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 32, 40, 0.06), 0 4px 14px rgba(16, 32, 40, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1518;
    --surface: #151f24;
    --surface-alt: #1b262c;
    --border: #2a383f;
    --text: #e7eef1;
    --text-muted: #9bb0ba;
    --brand: #2dd4bf;
    --brand-dark: #14b8a6;
    --brand-tint: #16302f;
    --danger: #fca5a5;
    --danger-tint: #3a1d1d;
    --warn: #fcd34d;
    --warn-tint: #382d15;
    --ok: #86efac;
    --ok-tint: #16301f;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

.boot { padding: 3rem; text-align: center; color: var(--text-muted); }

/* ---------------------------------------------------------------- layout -- */

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar .brand {
  font-weight: 700;
  color: var(--brand);
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar .brand small {
  display: block;
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.topbar .who { font-size: 0.85rem; color: var(--text-muted); }

main { padding: 1rem; max-width: 1100px; margin: 0 auto; }

@media (min-width: 720px) {
  main { padding: 1.75rem; }
}

/* ----------------------------------------------------------------- cards -- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card h2 { margin: 0 0 0.25rem; font-size: 1.15rem; }
.card h3 { margin: 1.25rem 0 0.5rem; font-size: 0.95rem; }
.card .sub { color: var(--text-muted); font-size: 0.875rem; margin: 0 0 1rem; }

.page-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}
.page-head h1 { font-size: 1.35rem; margin: 0; margin-right: auto; }

/* ----------------------------------------------------------------- forms -- */

label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.3rem; }
.hint { font-weight: 400; color: var(--text-muted); font-size: 0.8rem; }

input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.9rem;
}

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

textarea { min-height: 110px; resize: vertical; }

.field-row { display: grid; gap: 0 1rem; }
@media (min-width: 640px) { .field-row { grid-template-columns: 1fr 1fr; } }

button {
  font: inherit;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
}
button:hover { background: var(--brand-dark); }
button:disabled { opacity: 0.6; cursor: progress; }

button.secondary { background: transparent; color: var(--brand); border-color: var(--border); }
button.secondary:hover { background: var(--brand-tint); }
button.link { background: none; border: none; color: var(--brand); padding: 0; text-decoration: underline; }

.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }

/* ---------------------------------------------------------------- alerts -- */

.alert { padding: 0.7rem 0.9rem; border-radius: 8px; font-size: 0.9rem; margin-bottom: 1rem; }
.alert.error { background: var(--danger-tint); color: var(--danger); }
.alert.info { background: var(--brand-tint); color: var(--brand-dark); }
.alert.warn { background: var(--warn-tint); color: var(--warn); }

/* ----------------------------------------------------------------- chips -- */

.chip {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.chip.status-new { background: var(--brand-tint); color: var(--brand-dark); border-color: transparent; }
.chip.status-awaiting_ai_triage { background: #ede9fe; color: #5b21b6; border-color: transparent; }
.chip.status-in_progress { background: #dbeafe; color: #1e40af; border-color: transparent; }
.chip.status-awaiting_supplier { background: var(--warn-tint); color: var(--warn); border-color: transparent; }
.chip.status-resolved { background: var(--ok-tint); color: var(--ok); border-color: transparent; }
.chip.status-closed { background: var(--surface-alt); color: var(--text-muted); }

.chip.breach { background: var(--danger-tint); color: var(--danger); border-color: transparent; }
.chip.prio-critical, .chip.prio-high { background: var(--danger-tint); color: var(--danger); border-color: transparent; }

/* --------------------------------------------------------------- tickets -- */

.ticket-list { display: grid; gap: 0.75rem; }

.ticket-row {
  display: block;
  text-align: left;
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  cursor: pointer;
  color: inherit;
  font-weight: 400;
}
.ticket-row:hover { background: var(--surface-alt); border-color: var(--brand); }

.ticket-row .row-top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.3rem;
}
.ticket-row .num { font-family: ui-monospace, "SF Mono", Consolas, monospace; font-size: 0.8rem; color: var(--text-muted); }
.ticket-row .subject { font-weight: 600; display: block; margin-bottom: 0.25rem; }
.ticket-row .meta { font-size: 0.8rem; color: var(--text-muted); }

.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 1rem; }
.filters select, .filters input { width: auto; min-width: 150px; margin-bottom: 0; }

/* ------------------------------------------------------------ definition -- */

.detail-grid { display: grid; gap: 0.75rem 1.5rem; }
@media (min-width: 640px) { .detail-grid { grid-template-columns: repeat(3, 1fr); } }

.detail-grid .k { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
.detail-grid .v { font-size: 0.92rem; word-break: break-word; }

/* ---------------------------------------------------------------- thread -- */

.thread { display: grid; gap: 0.75rem; margin: 0.5rem 0 1.25rem; }

.msg {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
  background: var(--surface-alt);
}
.msg.from-technician, .msg.from-ai_agent { background: var(--brand-tint); border-color: transparent; }
.msg.internal { background: var(--warn-tint); border-color: transparent; }

.msg .msg-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: baseline;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}
.msg .msg-head .author { font-weight: 700; color: var(--text); }
.msg .body { white-space: pre-wrap; font-size: 0.93rem; }

/* --------------------------------------------------------------- sla box -- */

.sla-box { display: grid; gap: 0.75rem; }
@media (min-width: 640px) { .sla-box { grid-template-columns: 1fr 1fr; } }

.sla-clock { border: 1px solid var(--border); border-radius: var(--radius); padding: 0.75rem 0.9rem; }
.sla-clock.breached { border-color: var(--danger); background: var(--danger-tint); }
.sla-clock .label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
.sla-clock .value { font-size: 1.1rem; font-weight: 700; }
.sla-clock .note { font-size: 0.78rem; color: var(--text-muted); }

.bar { height: 6px; border-radius: 999px; background: var(--border); overflow: hidden; margin: 0.4rem 0; }
.bar > span { display: block; height: 100%; background: var(--brand); }
.sla-clock.breached .bar > span { background: var(--danger); }

/* ---------------------------------------------------------------- footer -- */

.footer-note {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-align: center;
  padding: 1.5rem 1rem 2.5rem;
}

.empty { color: var(--text-muted); text-align: center; padding: 2rem 1rem; }

.login-wrap { max-width: 420px; margin: 3rem auto; padding: 0 1rem; }
.login-wrap .demo { font-size: 0.8rem; color: var(--text-muted); margin-top: 1rem; }
.login-wrap .demo code { font-size: 0.75rem; }

.tabs { display: flex; gap: 0.4rem; margin-bottom: 1rem; flex-wrap: wrap; }
.tabs button { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.tabs button[aria-current="true"] { background: var(--brand); color: #fff; border-color: transparent; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}