/* Skycom design system v1 — clean-room build, no third-party brand assets. */

:root {
  --c-bg:           #0a1119;
  --c-surface:      #0f1822;
  --c-surface-2:    #1a2332;
  --c-border:       #1e2d3d;
  --c-text:         #e0f2fe;
  --c-text-dim:     #8b9dad;
  --c-text-mute:    #6a7686;
  --c-primary:      #0ea5e9;   /* sky-500 */
  --c-primary-2:    #38bdf8;   /* sky-400 */
  --c-accent:       #06b6d4;   /* cyan-500 */
  --c-success:      #22c55e;
  --c-warn:         #f59e0b;
  --c-danger:       #ef4444;
  --c-overlap:      #fbbf24;   /* dev-mode highlight */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: system-ui, -apple-system, "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  overflow: hidden;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: transparent; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── App shell ──────────────────────────────────────────────── */
.app {
  display: grid;
  grid-template-columns: 72px 320px 1fr;
  grid-template-rows: 100vh;
}
.rail { background: #060c14; border-right: 1px solid var(--c-border); display: flex; flex-direction: column; align-items: center; padding: 14px 0; gap: 4px; }
.rail .logo { width: 44px; height: 44px; margin-bottom: 8px; }
.rail .tab {
  width: 56px; height: 56px; border-radius: var(--r-md);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: var(--c-text-dim); position: relative;
  transition: background 0.15s, color 0.15s;
}
.rail .tab:hover { background: var(--c-surface); color: var(--c-text); }
.rail .tab.active { background: var(--c-surface-2); color: var(--c-primary); }
.rail .tab .ico { font-size: 20px; line-height: 1; }
.rail .tab .lbl { font-size: 9px; text-transform: uppercase; letter-spacing: 0.5px; }
.rail .tab .badge { position: absolute; top: 6px; right: 6px; background: var(--c-danger); color: white; border-radius: 10px; padding: 1px 6px; font-size: 10px; font-weight: 600; }
.rail .me { margin-top: auto; width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); display: flex; align-items: center; justify-content: center; color: white; font-weight: 600; position: relative; }
.rail .me .pres-dot { position: absolute; bottom: -1px; right: -1px; width: 12px; height: 12px; border-radius: 50%; background: var(--c-success); border: 2px solid #060c14; }

/* ─── Middle pane ────────────────────────────────────────────── */
.pane { background: var(--c-surface); border-right: 1px solid var(--c-border); display: flex; flex-direction: column; overflow: hidden; }
.pane-head { padding: 18px 20px 12px; border-bottom: 1px solid var(--c-border); }
.pane-head h1 { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.pane-head .sub { font-size: 12px; color: var(--c-text-dim); margin-top: 4px; }
.pane-body { flex: 1; overflow-y: auto; padding: 8px; }

/* ─── Conversation / call view ───────────────────────────────── */
.view { background: var(--c-bg); display: flex; flex-direction: column; overflow: hidden; }
.view-empty {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--c-text-mute); gap: 14px;
}
.view-empty svg { width: 96px; height: 96px; opacity: 0.35; }
.view-empty .title { font-size: 18px; color: var(--c-text-dim); }
.view-empty .body { font-size: 13px; max-width: 360px; text-align: center; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--r-md);
  font-size: 13px; font-weight: 500;
  background: var(--c-surface-2); color: var(--c-text);
  border: 1px solid var(--c-border);
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover { background: #243348; border-color: var(--c-primary); }
.btn-primary { background: var(--c-primary); border-color: var(--c-primary); color: white; }
.btn-primary:hover { background: var(--c-primary-2); }
.btn-danger { background: var(--c-danger); border-color: var(--c-danger); color: white; }

/* ─── Form inputs ────────────────────────────────────────────── */
.input {
  display: block; width: 100%;
  padding: 10px 12px; border-radius: var(--r-md);
  background: var(--c-surface-2); color: var(--c-text);
  border: 1px solid var(--c-border);
}
.input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(14,165,233,0.15); }

/* ─── Login page ─────────────────────────────────────────────── */
.auth { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; background: linear-gradient(135deg, #0a1119 0%, #0f1822 100%); }
.auth-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--r-lg); padding: 36px; width: 100%; max-width: 420px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.auth-card h1 { font-size: 24px; margin-bottom: 6px; }
.auth-card p.sub { color: var(--c-text-dim); font-size: 13px; margin-bottom: 24px; }
.auth-card .field { margin-bottom: 14px; }
.auth-card .field label { display: block; font-size: 12px; color: var(--c-text-dim); margin-bottom: 4px; }
.auth-card .row { display: flex; align-items: center; gap: 10px; margin-top: 8px; font-size: 12px; color: var(--c-text-dim); }
.auth-card .err { color: var(--c-danger); font-size: 12px; min-height: 16px; margin-top: 8px; }
.auth-card .brand { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.auth-card .brand img { width: 44px; height: 44px; }
.auth-card .brand .name { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.auth-card .brand .name span { color: var(--c-accent); }

/* ─── Settings layout (Phone Settings is full-page) ──────────── */
.settings { padding: 32px 40px; max-width: 720px; margin: 0 auto; }
.settings h1 { font-size: 26px; margin-bottom: 4px; }
.settings .sub { color: var(--c-text-dim); margin-bottom: 28px; }
.settings .section { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--r-md); padding: 20px; margin-bottom: 16px; }
.settings .section h2 { font-size: 13px; text-transform: uppercase; color: var(--c-primary); letter-spacing: 0.6px; margin-bottom: 14px; }
.settings .row { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--c-border); }
.settings .row:last-child { border-bottom: none; }
.settings .row label { flex: 1; }

/* ─── Toggle switch ──────────────────────────────────────────── */
.toggle { position: relative; width: 40px; height: 22px; background: #2a3a4d; border-radius: 11px; cursor: pointer; transition: background 0.15s; flex-shrink: 0; }
.toggle.on { background: var(--c-primary); }
.toggle::after { content: ''; position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; border-radius: 50%; background: white; transition: left 0.15s; }
.toggle.on::after { left: 20px; }

/* ─── Dev-mode overlap highlights ─────────────────────────────
   Mark elements with data-overlap="MM+LK" — they get a yellow chip
   when ?dev=true (toggled by JS that adds .devmode to <html>).
   ────────────────────────────────────────────────────────────── */
html.devmode [data-overlap] {
  position: relative;
  outline: 1px dashed var(--c-overlap);
  outline-offset: 2px;
}
html.devmode [data-overlap]::after {
  content: attr(data-overlap);
  position: absolute;
  top: -10px; right: -4px;
  background: var(--c-overlap); color: #000;
  font-size: 9px; font-weight: 600; letter-spacing: 0.5px;
  padding: 1px 6px; border-radius: 6px;
  pointer-events: none;
  z-index: 10;
}
html.devmode .overlap-text { color: var(--c-overlap) !important; }

/* Dev-mode toggle pill in topbar */
html.devmode .dev-pill { background: var(--c-overlap); color: #000; }
.dev-pill { font-size: 10px; padding: 2px 8px; border-radius: 10px; background: var(--c-surface-2); color: var(--c-text-dim); margin-left: 8px; }

/* ─── Responsive: tablet (≤768) collapses middle pane ───────── */
@media (max-width: 768px) {
  .app { grid-template-columns: 60px 1fr; }
  .pane { display: none; }
  .pane.show { display: flex; position: fixed; inset: 0 0 0 60px; z-index: 50; }
  .view { display: none; }
  .view.show { display: flex; position: fixed; inset: 0 0 0 60px; z-index: 51; background: var(--c-bg); }
  .view .back { display: flex; padding: 10px 14px; align-items: center; gap: 6px; color: var(--c-text-dim); border-bottom: 1px solid var(--c-border); }
}
@media (max-width: 480px) {
  .rail { width: 100%; height: 56px; flex-direction: row; padding: 0 6px; gap: 0; border-right: none; border-top: 1px solid var(--c-border); position: fixed; bottom: 0; left: 0; right: 0; justify-content: space-around; z-index: 100; }
  .rail .logo, .rail .me { display: none; }
  .rail .tab { width: 50px; height: 48px; }
  .rail .tab .lbl { display: none; }
  .app { grid-template-columns: 1fr; grid-template-rows: 1fr 56px; }
  .pane.show, .view.show { left: 0; bottom: 56px; }
}