/* public/assets/style.css */
:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #4f46e5;

  /* chat colors */
  --chat-user-bg: #4f46e5;
  --chat-user-fg: #ffffff;
  --chat-bot-bg: #ffffff;
  --chat-bot-fg: #111827;
  --chat-system-bg: rgba(17, 24, 39, 0.04);
  --chat-system-fg: #374151;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    "Helvetica Neue", Arial, "Noto Sans JP", "Apple Color Emoji",
    "Segoe UI Emoji";
  color: var(--text);
  background: linear-gradient(
    180deg,
    #eef2ff 0%,
    var(--bg) 35%,
    #ffffff 100%
  );
}

a {
  color: var(--brand);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* =====================
   Layout / Common
===================== */

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.nav .right a {
  margin-left: 14px;
  font-weight: 600;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

/* ★ 追加：縦にカードが並んだときの間隔 */
.card + .card {
  margin-top: 18px;
}

.card h2 {
  margin: 0 0 10px;
}

.card p {
  margin: 0 0 14px;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
}

.btn.primary {
  background: var(--brand);
  color: #fff;
  border-color: transparent;
}

.row {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.row > * {
  flex: 1;
}

input,
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 14px;
  background: #fff;
}

label {
  display: block;
  margin: 12px 0 6px;
  font-weight: 700;
}

/* =====================
   Chat (Bubble UI)
===================== */

.chatbox {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.95);

  /* 高さ・スクロール */
  height: 360px;
  min-height: 260px;
  max-height: 75vh;
  overflow: auto;

  /* ユーザーが縦に伸ばせる */
  resize: vertical;

  /* 吹き出しレイアウト */
  display: flex;
  flex-direction: column;
  gap: 14px;

  white-space: normal;
}

/* 行（左右位置） */
.msg-row {
  display: flex;
  width: 100%;
}

.msg-row.user {
  justify-content: flex-end;
}

.msg-row.bot {
  justify-content: flex-start;
}

.msg-row.system {
  justify-content: center;
}

/* 吹き出し本体 */
.msg-bubble {
  max-width: min(680px, 86%);
  border-radius: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.06);
}

/* ユーザー */
.msg-bubble.user {
  background: var(--chat-user-bg);
  color: var(--chat-user-fg);
  border-color: transparent;
  border-bottom-right-radius: 6px;
}

/* Bot */
.msg-bubble.bot {
  background: var(--chat-bot-bg);
  color: var(--chat-bot-fg);
  border-bottom-left-radius: 6px;
}

/* System */
.msg-bubble.system {
  background: var(--chat-system-bg);
  color: var(--chat-system-fg);
  border-color: rgba(17, 24, 39, 0.08);
  box-shadow: none;
}

/* 吹き出し内テキスト */
.msg-text {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.7;
  font-size: 14px;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI,
    Roboto, "Helvetica Neue", Arial, "Noto Sans JP";
}

/* =====================
   Footer
===================== */

.footer {
  padding: 18px 0;
  color: var(--muted);
  font-size: 13px;
}

/* =====================
   Responsive
===================== */

@media (max-width: 860px) {
  .container {
    padding: 16px;
  }

  .msg-bubble {
    max-width: 92%;
  }
}

@media (max-width: 600px) {
  .nav {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 0;
  }

  .nav .right a {
    margin-left: 0;
    margin-right: 12px;
  }

  /* iOSズーム防止 */
  textarea,
  input,
  select {
    font-size: 16px;
  }

  .chatbox {
    height: 300px;
  }

  .msg-text {
    font-size: 15px;
  }

  /* スマホではカード間を少し広めに */
  .card + .card {
    margin-top: 22px;
  }
}