/* ============================================================
   AI Solar Advisor — Chat Widget (Sofin Solar theme)
   palette สอดคล้องกับ frontend.css : orange / charcoal / cream
   ============================================================ */
.sofa {
  --sofa-orange: #f26522;
  --sofa-orange-dark: #d9511a;
  --sofa-charcoal: #1f1f21;
  --sofa-charcoal-soft: #28282b;
  --sofa-cream: #f3ede4;
  --sofa-white: #ffffff;
  --sofa-text: #222;
  --sofa-muted: #6a6a6e;
  --sofa-line: rgba(34, 34, 34, 0.10);
  --sofa-radius: 16px;
  --sofa-shadow: 0 18px 50px rgba(31, 31, 33, 0.28);
  font-family: "Inter", "Segoe UI", Tahoma, sans-serif;
  box-sizing: border-box;
}
.sofa *, .sofa *::before, .sofa *::after { box-sizing: border-box; }

/* ---------- Launcher (ปุ่มลอยมุมขวาล่าง) ---------- */
.sofa-launcher {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 2147483000;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px 14px 16px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--sofa-orange), var(--sofa-orange-dark));
  color: #fff;
  font: 600 15px/1 "Inter", sans-serif;
  cursor: pointer;
  box-shadow: var(--sofa-shadow);
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}
.sofa-launcher:hover { transform: translateY(-2px); }
.sofa-launcher:active { transform: translateY(0); }
.sofa-launcher .sofa-launcher-ico {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  font-size: 17px;
}
.sofa-launcher.is-hidden { opacity: 0; pointer-events: none; transform: scale(.6); }

/* จุดแจ้งเตือนเล็ก ๆ */
.sofa-launcher .sofa-dot {
  position: absolute; top: 8px; right: 12px;
  width: 9px; height: 9px; border-radius: 50%;
  background: #36d399; border: 2px solid #fff;
}

/* ---------- Panel ---------- */
.sofa-panel {
  position: fixed;
  right: 22px;
  top: 22px;          /* anchor BOTH top & bottom → height is computed from the */
  bottom: 22px;       /* viewport, so the panel always fills it (no empty gaps)  */
  z-index: 2147483001;
  width: 388px;
  max-width: calc(100vw - 32px);
  padding: 0;          /* กัน global `section { padding:110px 0 }` ใน frontend.css รั่วเข้ามา */
  display: flex;
  flex-direction: column;
  background: var(--sofa-white);
  border-radius: var(--sofa-radius);
  box-shadow: var(--sofa-shadow);
  overflow: hidden;
  opacity: 0;
  transform: translateY(18px) scale(.98);
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.sofa-panel.is-open { opacity: 1; transform: none; pointer-events: auto; }

/* ---------- Header ---------- */
.sofa-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  background: var(--sofa-charcoal);
  color: #fff;
}
.sofa-head .sofa-avatar {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--sofa-orange), var(--sofa-orange-dark));
  font-size: 20px; flex: none;
}
.sofa-head .sofa-title { display: flex; flex-direction: column; line-height: 1.25; }
.sofa-head .sofa-title strong { font: 700 15px/1.2 "Sora", "Inter", sans-serif; }
.sofa-head .sofa-title small { font-size: 12px; color: rgba(255, 255, 255, 0.6); display: flex; align-items: center; gap: 5px; }
.sofa-head .sofa-title small::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; background: #36d399;
}
.sofa-head .sofa-close {
  margin-left: auto; width: 32px; height: 32px;
  border: none; border-radius: 9px; cursor: pointer;
  background: rgba(255, 255, 255, 0.1); color: #fff; font-size: 18px;
  display: grid; place-items: center; transition: background .15s ease;
}
.sofa-head .sofa-close:hover { background: rgba(255, 255, 255, 0.2); }

/* ---------- Messages ---------- */
.sofa-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 18px 16px 8px;
  background: var(--sofa-cream);
  scroll-behavior: smooth;
}
.sofa-body::-webkit-scrollbar { width: 7px; }
.sofa-body::-webkit-scrollbar-thumb { background: rgba(31, 31, 33, 0.18); border-radius: 10px; }

.sofa-msg { display: flex; margin-bottom: 12px; max-width: 86%; }
.sofa-msg.bot { margin-right: auto; }
.sofa-msg.user { margin-left: auto; justify-content: flex-end; }
.sofa-bubble {
  padding: 11px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
.sofa-msg.bot .sofa-bubble {
  background: #fff; color: var(--sofa-text);
  border-bottom-left-radius: 4px;
}
.sofa-msg.user .sofa-bubble {
  background: linear-gradient(135deg, var(--sofa-orange), var(--sofa-orange-dark));
  color: #fff; border-bottom-right-radius: 4px;
}

/* typing indicator */
.sofa-typing { display: inline-flex; gap: 4px; align-items: center; }
.sofa-typing span {
  width: 7px; height: 7px; border-radius: 50%; background: var(--sofa-muted);
  animation: sofa-bounce 1.2s infinite ease-in-out;
}
.sofa-typing span:nth-child(2) { animation-delay: .15s; }
.sofa-typing span:nth-child(3) { animation-delay: .3s; }
@keyframes sofa-bounce { 0%, 60%, 100% { transform: translateY(0); opacity: .5; } 30% { transform: translateY(-5px); opacity: 1; } }

/* ---------- Quick-reply chips & range buttons ---------- */
.sofa-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 2px 0 14px; }
.sofa-chip {
  border: 1px solid var(--sofa-orange);
  background: #fff;
  color: var(--sofa-orange-dark);
  padding: 9px 14px;
  border-radius: 999px;
  font: 600 13px/1 "Inter", sans-serif;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, transform .12s ease;
}
.sofa-chip:hover { background: var(--sofa-orange); color: #fff; }
.sofa-chip:active { transform: scale(.96); }
.sofa-chip.ghost { border-color: var(--sofa-line); color: var(--sofa-muted); }
.sofa-chip.ghost:hover { background: var(--sofa-charcoal); color: #fff; border-color: var(--sofa-charcoal); }

/* ---------- Recommendation cards ---------- */
.sofa-cards { display: flex; flex-direction: column; gap: 12px; margin: 4px 0 14px; }
.sofa-card {
  background: #fff;
  border: 1px solid var(--sofa-line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(31, 31, 33, 0.06);
}
.sofa-card.is-best { border-color: var(--sofa-orange); box-shadow: 0 6px 20px rgba(242, 101, 34, 0.18); }
.sofa-card-top { padding: 14px 14px 10px; }
.sofa-card-tier {
  display: inline-block;
  font: 700 11px/1 "Inter", sans-serif;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 5px 9px;
  border-radius: 6px;
  background: var(--sofa-cream);
  color: var(--sofa-muted);
  margin-bottom: 8px;
}
.sofa-card.is-best .sofa-card-tier { background: var(--sofa-orange); color: #fff; }
.sofa-card-name { font: 700 16px/1.3 "Sora", "Inter", sans-serif; color: var(--sofa-text); margin-bottom: 2px; }
.sofa-card-kw { font-size: 13px; color: var(--sofa-muted); }
.sofa-card-price { font: 800 22px/1.1 "Sora", "Inter", sans-serif; color: var(--sofa-orange-dark); margin-top: 8px; }
.sofa-card-price small { font: 500 12px/1 "Inter", sans-serif; color: var(--sofa-muted); }

.sofa-card-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--sofa-line);
  border-top: 1px solid var(--sofa-line);
  margin-top: 12px;
}
.sofa-stat { background: #fff; padding: 10px 12px; }
.sofa-stat .k { font-size: 11px; color: var(--sofa-muted); display: block; margin-bottom: 3px; }
.sofa-stat .v { font: 700 14px/1.2 "Inter", sans-serif; color: var(--sofa-text); }
.sofa-stat .v.accent { color: var(--sofa-orange-dark); }

.sofa-card-actions { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 14px; border-top: 1px solid var(--sofa-line); }
.sofa-btn {
  flex: 1 1 auto;
  min-width: 96px;
  text-align: center;
  border: 1px solid var(--sofa-orange);
  background: #fff;
  color: var(--sofa-orange-dark);
  padding: 9px 12px;
  border-radius: 10px;
  font: 600 13px/1.2 "Inter", sans-serif;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}
.sofa-btn:hover { background: var(--sofa-orange); color: #fff; }
.sofa-btn.primary { background: var(--sofa-orange); color: #fff; }
.sofa-btn.primary:hover { background: var(--sofa-orange-dark); }
.sofa-btn.ghost { border-color: var(--sofa-line); color: var(--sofa-muted); }
.sofa-btn.ghost:hover { background: var(--sofa-charcoal); color: #fff; border-color: var(--sofa-charcoal); }

/* ---------- Payment plan table (เปรียบเทียบแผนชำระเงิน) ---------- */
.sofa-plans {
  background: #fff;
  border: 1px solid var(--sofa-line);
  border-radius: 14px;
  overflow: hidden;
  margin: 4px 0 14px;
}
.sofa-plans-head {
  background: var(--sofa-charcoal);
  color: #fff;
  padding: 11px 14px;
  font: 700 14px/1.3 "Sora", "Inter", sans-serif;
}
.sofa-plans-head small { display: block; font: 400 12px/1.3 "Inter", sans-serif; color: rgba(255,255,255,0.65); margin-top: 2px; }
.sofa-plan-table { width: 100%; border-collapse: collapse; }
.sofa-plan-table th {
  background: var(--sofa-cream);
  color: var(--sofa-muted);
  font: 600 11px/1 "Inter", sans-serif;
  text-align: left;
  padding: 8px 10px;
}
.sofa-plan-table th.r, .sofa-plan-table td.r { text-align: right; }
.sofa-plan-table th.c, .sofa-plan-table td.c { text-align: center; }
.sofa-plan-table td { padding: 9px 10px; border-top: 1px solid var(--sofa-line); vertical-align: middle; }
.sofa-plan-name { font: 600 13px/1.25 "Inter", sans-serif; color: var(--sofa-text); }
.sofa-plan-int { font: 500 10px/1 "Inter", sans-serif; color: var(--sofa-orange-dark); background: rgba(242,101,34,.1); padding: 2px 5px; border-radius: 5px; margin-left: 4px; white-space: nowrap; }
.sofa-plan-total { font-size: 10.5px; color: var(--sofa-muted); margin-top: 2px; }
.sofa-plan-months { font-size: 10.5px; color: var(--sofa-muted); margin-top: 1px; }
.sofa-plan-table td.r { font: 700 13px/1.2 "Inter", sans-serif; color: var(--sofa-text); }
.sofa-plan-pick { padding: 6px 12px; min-width: 0; font-size: 12px; }
.sofa-plans-note { padding: 9px 14px; font-size: 11px; color: var(--sofa-muted); background: var(--sofa-cream); }

/* ---------- Inline form (quotation / callback) ---------- */
.sofa-form-sub {
  font-size: 12px;
  color: var(--sofa-orange-dark);
  background: rgba(242,101,34,.08);
  border-radius: 7px;
  padding: 6px 10px;
  margin-bottom: 10px;
}
.sofa-form {
  background: #fff;
  border: 1px solid var(--sofa-line);
  border-radius: 14px;
  padding: 14px;
  margin: 4px 0 14px;
}
.sofa-form h4 { font: 700 15px/1.3 "Sora", "Inter", sans-serif; margin: 0 0 10px; color: var(--sofa-text); }
.sofa-field { margin-bottom: 10px; }
.sofa-field label { display: block; font-size: 12px; color: var(--sofa-muted); margin-bottom: 4px; }
.sofa-field label .req { color: var(--sofa-orange-dark); }
.sofa-field input, .sofa-field textarea {
  width: 100%;
  border: 1px solid var(--sofa-line);
  border-radius: 9px;
  padding: 10px 12px;
  font: 400 14px/1.4 "Inter", sans-serif;
  color: var(--sofa-text);
  background: #fff;
}
.sofa-field input:focus, .sofa-field textarea:focus {
  outline: none; border-color: var(--sofa-orange);
  box-shadow: 0 0 0 3px rgba(242, 101, 34, 0.12);
}
.sofa-field textarea { resize: vertical; min-height: 56px; }
.sofa-field .err { color: #d92d20; font-size: 11px; margin-top: 4px; display: none; }
.sofa-field.has-error input, .sofa-field.has-error textarea { border-color: #d92d20; }
.sofa-field.has-error .err { display: block; }
.sofa-form-actions { display: flex; gap: 8px; margin-top: 4px; }

/* ---------- Success ---------- */
.sofa-success {
  text-align: center;
  background: #fff;
  border: 1px solid var(--sofa-line);
  border-radius: 14px;
  padding: 22px 16px;
  margin: 4px 0 14px;
}
.sofa-success .ico {
  width: 54px; height: 54px; border-radius: 50%;
  margin: 0 auto 12px; display: grid; place-items: center;
  background: rgba(54, 211, 153, 0.15); color: #1a9d6e; font-size: 28px;
}
.sofa-success h4 { font: 700 17px/1.3 "Sora", "Inter", sans-serif; margin: 0 0 6px; }
.sofa-success p { font-size: 13px; color: var(--sofa-muted); margin: 0; }

/* ---------- Suggestion chips (quick prompts เหนือช่องพิมพ์) ---------- */
.sofa-suggests {
  display: flex;
  gap: 8px;
  padding: 10px 14px 2px;
  background: #fff;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.sofa-suggests::-webkit-scrollbar { display: none; }
.sofa-suggests[hidden] { display: none; }
.sofa-suggest {
  flex: 0 0 auto;
  border: 1px solid var(--sofa-line);
  background: #f3ede4;
  color: var(--sofa-text);
  padding: 8px 14px;
  border-radius: 999px;
  font: 500 13px/1 "Inter", sans-serif;
  white-space: nowrap;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.sofa-suggest:hover { background: var(--sofa-orange); color: #fff; border-color: var(--sofa-orange); }
.sofa-suggest:active { transform: scale(.97); }

/* ---------- Composer ---------- */
.sofa-foot {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--sofa-line);
  background: #fff;
}
.sofa-foot textarea {
  flex: 1;
  border: 1px solid var(--sofa-line);
  border-radius: 12px;
  padding: 11px 13px;
  font: 400 14px/1.4 "Inter", sans-serif;
  resize: none;
  max-height: 96px;
  color: var(--sofa-text);
}
.sofa-foot textarea:focus { outline: none; border-color: var(--sofa-orange); box-shadow: 0 0 0 3px rgba(242, 101, 34, 0.10); }
.sofa-send {
  flex: none;
  width: 42px; height: 42px;
  border: none; border-radius: 12px;
  background: linear-gradient(135deg, var(--sofa-orange), var(--sofa-orange-dark));
  color: #fff; font-size: 18px; cursor: pointer;
  display: grid; place-items: center;
  transition: transform .12s ease, opacity .15s ease;
}
.sofa-send:hover { transform: translateY(-1px); }
.sofa-send:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.sofa-foot-note { font-size: 11px; color: var(--sofa-muted); text-align: center; padding: 0 14px 10px; background: #fff; margin: 0; }

/* ---------- Mobile ---------- */
@media (max-width: 480px) {
  .sofa-panel {
    right: 0; bottom: 0; top: 0;
    width: 100vw; max-width: 100vw;
    height: 100vh;        /* fallback for browsers/webviews without dvh support */
    height: 100dvh;
    max-height: 100vh;
    max-height: 100dvh;
    border-radius: 0;
  }
  .sofa-launcher { right: 16px; bottom: 16px; padding: 13px 18px 13px 14px; }
  .sofa-launcher .sofa-launcher-label { display: inline; }
}

@media (prefers-reduced-motion: reduce) {
  .sofa-launcher, .sofa-panel, .sofa-send, .sofa-chip, .sofa-typing span { transition: none; animation: none; }
}