:root {
  --bg: #0f1115;
  --card-bg: #171a21;
  --border: #2a2f3a;
  --text: #e8e9ec;
  --text-dim: #9aa0ab;
  --accent: #4f8cff;
  --accent-dim: #2a3a5c;
  --error: #ff6b6b;
  --bubble-user: #2a3a5c;
  --bubble-zia: #1f232c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.screen { height: 100%; }
.screen[hidden] { display: none; }

.screen-center {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 360px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  text-align: center;
}

.card h1 { margin: 0 0 4px; font-size: 1.6rem; }
.card .sub { color: var(--text-dim); margin: 0 0 20px; font-size: 0.92rem; }

.card form { display: flex; flex-direction: column; gap: 12px; }

input[type="password"], input[type="text"], select {
  background: #10131a;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 0.95rem;
  width: 100%;
}

input:focus, select:focus { outline: 2px solid var(--accent); }

button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 0.95rem;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }

.pesan-error {
  color: var(--error);
  font-size: 0.85rem;
  min-height: 1.2em;
  margin: 10px 0 0;
}

#google-btn-container {
  display: flex;
  justify-content: center;
  margin-top: 4px;
}

/* ── Chat ─────────────────────────────────────────────────────────────── */
#screen-chat {
  display: flex;
  flex-direction: column;
}

.chat-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--card-bg);
}
.chat-title { font-weight: 700; font-size: 1.1rem; }
.chat-user { color: var(--text-dim); font-size: 0.85rem; }

.chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
  position: relative;
}

#chat-messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 720px;
  margin: 0 auto;
}

.bubble {
  padding: 10px 14px;
  border-radius: 12px;
  max-width: 80%;
  white-space: pre-wrap;
  line-height: 1.4;
  font-size: 0.94rem;
}
.bubble-user {
  align-self: flex-end;
  background: var(--bubble-user);
}
.bubble-zia {
  align-self: flex-start;
  background: var(--bubble-zia);
  border: 1px solid var(--border);
}
.bubble-zia-catatan {
  align-self: flex-start;
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--text-dim);
  font-size: 0.82rem;
}

.drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(79, 140, 255, 0.15);
  border: 3px dashed var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent);
  pointer-events: none;
  z-index: 10;
}
/* BUG L300 (ditemukan Bayu 15 Jul 2026): `display: flex` di atas sama spesifisitas
   dgn aturan default browser `[hidden]{display:none}` -- krn urutan cascade, aturan
   INI yg menang, jadi overlay drag-drop MUNCUL TERUS di semua layar (termasuk
   gerbang password), bukan cuma saat drag aktif di layar chat. Fix: paksa [hidden]
   menang eksplisit. */
.drop-overlay[hidden] { display: none; }

.chat-input-bar {
  display: flex;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  background: var(--card-bg);
}
.chat-input-bar input[type="text"] { flex: 1; }
#btn-attach {
  background: transparent;
  border: 1px solid var(--border);
  font-size: 1.1rem;
  padding: 8px 12px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --border: #dde1e7;
    --text: #1c1f26;
    --text-dim: #666d7a;
    --bubble-user: #dbe7ff;
    --bubble-zia: #f0f1f4;
  }
  input[type="password"], input[type="text"], select { background: #fff; }
}