/* ============================================================
   RVC MAP TILE DOWNLOADER
   ============================================================ */

/* ── DARK (default) ─────────────────────────────────────────── */
:root {
  --bg0:     #030508;
  --bg1:     #080c12;
  --bg2:     #0b1018;
  --bg3:     #0f1520;

  --border:  rgba(255,255,255,0.09);
  --border2: rgba(255,255,255,0.16);

  --cyan:    #00c8ff;
  --green:   #39ff6e;
  --yellow:  #ffc700;
  --red:     #ff2d4b;

  --text:    #d8eaf5;
  --muted:   #6b8496;

  --green-bg: rgba(57,255,110,0.10);
  --green-bd: rgba(57,255,110,0.45);
  --yellow-bg: rgba(255,199,0,0.08);
  --yellow-bd: rgba(255,199,0,0.32);
  --red-bg:   rgba(255,45,75,0.08);
  --red-bd:   rgba(255,45,75,0.35);

  --font-ui:   'Rajdhani', 'Segoe UI', 'Ubuntu', sans-serif;
  --font-mono: 'Share Tech Mono', 'Ubuntu Mono', 'Courier New', monospace;
}

/* ── LIGHT ──────────────────────────────────────────────────── */
:root[data-theme="light"] {
  --bg0:     #eef2f6;
  --bg1:     #ffffff;
  --bg2:     #ffffff;
  --bg3:     #f4f7fa;

  --border:  rgba(0,0,0,0.10);
  --border2: rgba(0,0,0,0.18);

  --cyan:    #0072a3;
  --green:   #0f8a3c;
  --yellow:  #8a6100;
  --red:     #c1122c;

  --text:    #16212b;
  --muted:   #5a6b78;

  --green-bg: rgba(15,138,60,0.09);
  --green-bd: rgba(15,138,60,0.35);
  --yellow-bg: rgba(138,97,0,0.09);
  --yellow-bd: rgba(138,97,0,0.30);
  --red-bg:   rgba(193,18,44,0.07);
  --red-bd:   rgba(193,18,44,0.30);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  min-height: 100%;
  background: var(--bg0);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  transition: background 0.15s, color 0.15s;
}

/* ── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  min-height: 68px;
  background: var(--bg1);
  border-bottom: 1px solid var(--border2);
  /* 1fr / auto / 1fr keeps the title centred on the page regardless of
     how wide the theme button is. */
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 12px 20px;
  gap: 12px;
}
.nav-title {
  grid-column: 2;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.navbar .theme-btn { grid-column: 3; justify-self: end; }

.nav-logo {
  grid-column: 1;
  justify-self: start;
  height: 40px;
  width: auto;
  display: block;
}

@media (max-width: 620px) {
  .navbar { grid-template-columns: auto 1fr auto; }
  .nav-title { grid-column: 2; font-size: 0.95rem; letter-spacing: 0.06em; }
  .nav-logo { height: 30px; }
  .navbar .theme-btn { font-size: 0.72rem; padding: 6px 9px; }
}
.theme-btn {
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 8px 14px;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}
.theme-btn:hover { border-color: var(--cyan); }

/* ── LAYOUT ─────────────────────────────────────────────────── */
.wrap { max-width: 620px; margin: 0 auto; padding: 24px 16px 64px; }

.card {
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 8px;
  padding: 22px;
}
.card h2 {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* ── FORM ───────────────────────────────────────────────────── */
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 5px;
}
.field input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg0);
  border: 1px solid var(--border2);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.95rem;
}
.field input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(0,150,220,0.20);
}
.hint {
  display: block;
  margin-top: 5px;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--muted);
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 5px;
}
.label-row label { margin-bottom: 0; }

.divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 22px 0 18px;
}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  flex: 1 1 auto;
  min-width: 150px;
  padding: 12px 16px;
  border-radius: 4px;
  border: 1px solid var(--border2);
  background: var(--bg3);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--cyan); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: var(--green-bg);
  border-color: var(--green-bd);
  color: var(--green);
}
.btn-primary:hover:not(:disabled) { border-color: var(--green); }

.btn-help {
  border: 1px solid var(--yellow-bd);
  background: var(--yellow-bg);
  color: var(--yellow);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 11px;
  border-radius: 4px;
  cursor: pointer;
}
.btn-help:hover { border-color: var(--yellow); }

/* ── HELP PANEL ─────────────────────────────────────────────── */
.help-panel {
  margin: 10px 0 16px;
  padding: 12px 14px;
  background: var(--yellow-bg);
  border: 1px solid var(--yellow-bd);
  border-left: 3px solid var(--yellow);
  border-radius: 4px;
  font-size: 0.87rem;
  line-height: 1.6;
}
.help-panel strong { color: var(--yellow); }
.help-panel ol { margin: 8px 0 0 18px; }
.help-panel li { margin-bottom: 3px; }

/* ── STATUS ─────────────────────────────────────────────────── */
.status {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
  min-height: 1.3em;
}
.status.ok   { color: var(--green); }
.status.warn { color: var(--yellow); }
.status.err  { color: var(--red); }

/* ── PREVIEW ────────────────────────────────────────────────── */
.preview-shell {
  margin-top: 14px;
  border: 1px solid var(--border2);
  border-radius: 6px;
  background: var(--bg0);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  overflow: auto;
  max-height: 60vh;
}
.placeholder {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 30px 10px;
}
#tilePreview, #tileCanvas { max-width: 100%; height: auto; display: block; }

/* ── FILENAME WARNING ───────────────────────────────────────── */
.warn-box {
  margin-top: 20px;
  padding: 14px 16px;
  background: var(--red-bg);
  border: 1px solid var(--red-bd);
  border-left: 3px solid var(--red);
  border-radius: 4px;
}
.warn-box h3 {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 8px;
}
.warn-box p { font-size: 0.88rem; line-height: 1.6; }
.warn-box code {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 9px;
  background: var(--bg0);
  border: 1px solid var(--border2);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
  word-break: break-all;
}

footer {
  text-align: center;
  padding: 20px 16px 40px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted);
}

/* ── LINKS ──────────────────────────────────────────────────── */
.help-panel a {
  color: var(--cyan);
  font-weight: 600;
  text-underline-offset: 2px;
}
.help-panel a:hover { text-decoration: none; }