/* ===== リセット・ベース ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --surface: #1a1d26;
  --border: #2d3148;
  --accent: #4f7cff;
  --accent-hover: #3d6aee;
  --text: #e8eaf0;
  --text-muted: #8892a4;
  --panel-self: #2a3250;
  --panel-other: #1e2535;
  --danger: #e04040;
  --success: #2ecc71;
  --font: 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
}

/* ===== ① 初期画面 ===== */
.start-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.start-container {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.start-header {
  text-align: center;
}

.start-header h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.start-tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.start-user-id {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.start-user-id strong {
  color: var(--text);
  font-family: monospace;
  letter-spacing: 1px;
}

.start-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-start {
  width: 100%;
  padding: 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn-start:hover  { background: var(--accent-hover); }
.btn-start:active { transform: scale(0.98); }

.btn-join {
  width: 100%;
  padding: 18px;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 12px;
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn-join:hover  { background: rgba(79, 124, 255, 0.1); }
.btn-join:active { transform: scale(0.98); }

.start-footer {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.start-footer a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
}

.start-footer a:hover { text-decoration: underline; }

.start-footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== ボタン共通 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  user-select: none;
}

.btn:hover    { opacity: 0.9; }
.btn:active   { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-small {
  padding: 6px 14px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-send {
  background: var(--accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: 10px;
  white-space: nowrap;
}

.btn-mic {
  background: var(--accent);
  color: #fff;
  padding: 20px 40px;
  font-size: 1.2rem;
  border-radius: 50px;
  width: 100%;
  max-width: 300px;
  border: none;
  font-family: var(--font);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-mic.recording {
  background: var(--danger);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(224, 64, 64, 0.4); }
  50%       { box-shadow: 0 0 0 12px rgba(224, 64, 64, 0); }
}

/* ===== ② トーク画面レイアウト ===== */
.room-page {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.room-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.header-qr-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  font-family: var(--font);
  transition: border-color 0.15s, color 0.15s;
}

.header-qr-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== 会話エリア ===== */
.chat-area {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===== パネル（Teamsスタイル・1発言1パネル） ===== */
.panel-wrapper {
  display: flex;
  flex-direction: column;
  max-width: 80%;
}

.panel-left  { align-self: flex-start; }
.panel-right { align-self: flex-end; }

.panel-sender {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  padding: 0 4px;
}

.panel-right .panel-sender { text-align: right; }

.panel {
  padding: 12px 16px;
  border-radius: 4px;
  font-size: 1.5rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
}

.panel-left  .panel { background: var(--panel-other); border-left: 3px solid var(--border); }
.panel-right .panel { background: var(--panel-self);  border-right: 3px solid var(--accent); }

.panel-partial {
  opacity: 0.6;
  font-style: italic;
}

.panel-ts {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
  padding: 0 4px;
}

.panel-right .panel-ts { text-align: right; }

/* ===== 下部コントロール ===== */
.room-controls {
  padding: 12px 16px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.controls-row {
  display: flex;
  width: 100%;
  gap: 8px;
  align-items: flex-end;
}

#textInput {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  resize: none;
  line-height: 1.5;
}

#textInput:focus { outline: none; border-color: var(--accent); }
#textInput::placeholder { color: var(--text-muted); }

/* ===== ステータスメッセージ ===== */
#statusMsg {
  padding: 10px 16px;
  font-size: 0.85rem;
  text-align: center;
  flex-shrink: 0;
}

.status-info    { background: #1a2a4a; color: #7ab4ff; }
.status-error   { background: #3a1a1a; color: #ff7a7a; }
.status-success { background: #1a3a2a; color: #7affb4; }

/* ===== ③ QRモーダル ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 24px;
  width: 90%;
  max-width: 360px;
  position: relative;
  text-align: center;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover { color: var(--text); }

#qrContainer {
  margin: 16px auto 8px;
  display: flex;
  justify-content: center;
}

#qrContainer img {
  border-radius: 12px;
  padding: 8px;
  background: #fff;
}

.room-id-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: monospace;
  margin-bottom: 20px;
}

.modal-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

.modal-invite-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-align: left;
}

.modal-invite-row {
  display: flex;
  gap: 8px;
}

.modal-invite-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
}

.modal-invite-input:focus { outline: none; border-color: var(--accent); }
.modal-invite-input::placeholder { color: var(--text-muted); }

.btn-invite {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.btn-invite:hover { background: var(--accent-hover); }

/* ===== 利用規約ページ ===== */
.terms-page { padding: 24px; }

.terms-container {
  max-width: 720px;
  margin: 0 auto;
}

.terms-header { margin-bottom: 32px; }

.terms-back {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  display: inline-block;
  margin-bottom: 16px;
}

.terms-header h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.terms-date {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.terms-body section { margin-bottom: 28px; }

.terms-body h2 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--accent);
}

.terms-body p      { margin-bottom: 10px; color: var(--text-muted); }
.terms-body ul     { padding-left: 20px; color: var(--text-muted); }
.terms-body li     { margin-bottom: 6px; }
.terms-body strong { color: var(--text); }

.terms-footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== スマホ最適化 ===== */
@media (max-width: 600px) {
  .panel { font-size: 1.8rem; }
  .panel-wrapper { max-width: 90%; }
  #qrCanvas { width: 200px !important; height: 200px !important; }
}