/* File: index.css (Revisi Perbaikan Viewport JS) */

/* Layout Aplikasi 2 Kolom */
body {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 260px 1fr;
  overflow: hidden;

  /* ⭐️ PERBAIKAN VIEWPORT: Gunakan variabel --vh dari JS ⭐️ */
  height: 100vh; /* Fallback untuk browser non-JS */
  height: calc(var(--vh, 1vh) * 100);
}

/* Sidebar (Kolom Kiri) */
.sidebar {
  background: var(--accent);
  color: #ffffff;
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.sidebar-header h1 {
  margin: 0 0 var(--sp-4);
  font-size: var(--fs-2xl);
  line-height: var(--lh-tight);
  color: #ffffff;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.sidebar-nav .btnlink {
  background: rgba(255,255,255, 0.1);
  border-color: rgba(255,255,255, 0.2);
  color: #ffffff;
  text-align: left;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-nav .btnlink.primary {
  background: #ffffff;
  color: var(--accent);
  border-color: #ffffff;
}
.sidebar-nav .btnlink:hover {
  background: rgba(255,255,255, 0.2);
}
.sidebar-nav .btnlink.primary:hover {
  background: #f0f9ff;
  color: var(--accent);
}
.sidebar-footer {
  margin-top: auto;
}
.sidebar-footer .btnlink {
  background: transparent;
  border-color: transparent;
  color: #ffffff;
  opacity: 0.8;
  padding-left: 0;
}


/* --- LOGIKA CSS BARU (Kolom Kanan) --- */

.chat-container {
  background: var(--bg);
  padding: 0;
  overflow: hidden;
  
  display: flex;
  flex-direction: column;
  height: 100%; /* 100% dari 'body' (yang sekarang setinggi --vh) */
}

/* Bagian 1: Header Chat */
.chat-header {
  flex-shrink: 0;
  padding: var(--sp-4) var(--sp-6);
  background: var(--box);
  border-bottom: 1px solid var(--line);
}
.chat-header p.sub {
  margin: 0;
  color: var(--muted);
  max-width: 880px;
}

/* Bagian 2: Riwayat Obrolan (Log) */
#log {
  flex-grow: 1;
  overflow-y: auto;
  padding: var(--sp-4) var(--sp-6);
  
  white-space: pre-wrap;
  max-height: none;
  margin: 0;
  /* Tambahkan ini untuk scrolling mulus di iOS */
  -webkit-overflow-scrolling: touch;
}

/* Bagian 3: Area Input (Bawah) */
.input-area {
  flex-shrink: 0;
  background: var(--box);
  border-top: 1px solid var(--line);
  padding: var(--sp-4) var(--sp-6);
  box-shadow: 0 -4px 12px rgba(0,0,0, .03);
  
  max-width: 880px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
}


/* Gaya Gelembung (Tidak Berubah) */
.bubble {
  padding: 10px 12px;
  border-radius: 12px;
  margin: 8px 0;
  line-height: 1.55;
  font-size: 15px;
  border: 1px solid var(--line);
}
.bubble b { font-weight: 600; }
.bot { background: rgba(16, 185, 129, .08); }
.user { background: rgba(14, 165, 233, .08); }

/* Gaya Input Stack */
.input-stack {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-end;
}
label.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;
}

textarea,
button {
  font-size: var(--control-font);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  padding: var(--control-pad-y) var(--control-pad-x);
  outline: none;
  transition: box-shadow .15s ease, border-color .15s ease;
  background: var(--bg);
  color: inherit;
}

textarea {
  resize: vertical;
  min-height: 80px;
  max-height: 200px;
  flex-grow: 1;
}
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .25);
}

button {
  flex-shrink: 0;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  min-height: 46px;
  font-weight: 700;
}
button[disabled] {
  opacity: .6;
  cursor: not-allowed;
}
.btnlink.primary:hover,
button:not([disabled]):hover {
  background-color: #0c87b8;
}


/* Gaya Hint & Chips */
.chip-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.chip {
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 20px;
  background-color: var(--box);
  border: 1px solid var(--line);
  color: var(--text);
  cursor: pointer;
  transition: background-color 0.2s;
  min-height: auto;
  font-weight: normal;
}
.chip:hover {
  background-color: var(--line);
}

.hint {
  margin-top: var(--sp-2);
  color: var(--muted);
  font-size: var(--fs-sm);
}

/* Gaya Footer */
.site-footer{
  margin: var(--sp-3) 0 0;
  padding: 0;
  color: var(--muted);
  font-size: var(--fs-sm);
  text-align: left;
}
.site-footer b{ font-weight: 600; }


/* Gaya Spinner & Indikator */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, .6);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  vertical-align: -3px;
  margin-right: 6px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.typing-indicator {
  display: flex;
  align-items: center;
  padding: 10px 0;
}
.typing-indicator span {
  height: 8px;
  width: 8px;
  margin: 0 2px;
  background-color: rgba(16, 185, 129, .4);
  border-radius: 50%;
  display: inline-block;
  animation: typing-bounce 1.4s infinite both;
}
.typing-indicator span:nth-child(1) { animation-delay: 0.0s; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1.0); }
}

/* Media Query untuk Mobile */
@media (max-width: 720px) {
  body {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
  
  .chat-header { padding: var(--sp-3) var(--sp-4); }
  #log { padding: var(--sp-2) var(--sp-4); }
  .input-area { padding: var(--sp-3) var(--sp-4); }
  
  textarea, button { font-size: 16px; }
  .chip { font-size: 13px; }
}