:root {
  --bg: #f4f1ea;
  --ink: #2b2723;
  --sub: #6f675c;
  --accent: #7a6a53;
  --card: #fffdf8;
  --line: #e2dccf;
  --shadow: 0 8px 30px rgba(60, 50, 35, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  -webkit-font-smoothing: antialiased;
}

.screen { min-height: 100vh; display: flex; flex-direction: column; }
[hidden] { display: none !important; }

/* Login */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 42px 36px;
  width: 100%;
  max-width: 360px;
  text-align: center;
}
.brand { font-size: 44px; margin: 0; letter-spacing: 0.15em; }
.brand-sub { color: var(--sub); margin: 6px 0 28px; letter-spacing: 0.08em; font-size: 13px; }
#login-form { display: flex; flex-direction: column; gap: 12px; }
input, textarea, button, select { font-family: inherit; font-size: 15px; }
input {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
button {
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  background: var(--accent);
  color: #fff;
  transition: opacity 0.15s;
}
button:hover { opacity: 0.9; }
button:disabled { opacity: 0.5; cursor: default; }
.error { color: #a3402f; font-size: 13px; margin-top: 12px; }

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
}
.topbar-brand { font-size: 22px; letter-spacing: 0.12em; }
.topbar-brand span { color: var(--sub); font-size: 12px; letter-spacing: 0.2em; }
.sidebar-toggle { display: none; margin-right: auto; }
.tabs { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.tab {
  background: transparent;
  color: var(--sub);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
}
.tab.active { background: var(--accent); color: #fff; }
.topbar-user { display: flex; align-items: center; gap: 12px; color: var(--sub); font-size: 13px; margin-left: auto; }
.linklike { background: none; color: var(--accent); padding: 4px 6px; }

.app-body { display: flex; flex: 1; min-height: 0; }
.main-content {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  min-width: 0;
}
.hint { color: var(--sub); font-size: 14px; line-height: 1.7; }

/* Sidebar */
.zengo-sidebar {
  width: 260px;
  background: var(--card);
  border-right: 1px solid var(--line);
  padding: 18px 14px;
  overflow-y: auto;
  flex-shrink: 0;
}
.sidebar-head h2 { margin: 0 0 10px; font-size: 18px; letter-spacing: 0.1em; }
#zengo-search { width: 100%; margin-bottom: 12px; padding: 8px 10px; font-size: 14px; }
.zengo-list { list-style: none; margin: 0; padding: 0; }
.zengo-list li {
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.zengo-list li:hover, .zengo-list li.active { background: #f4f1ea; }
.zengo-list .z-name { font-weight: 600; }
.zengo-list .z-read { color: var(--sub); font-size: 12px; }

/* Zengo card */
.zengo-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 40px 34px;
  text-align: center;
}
.zengo-card.compact {
  padding: 18px 22px;
  margin-bottom: 18px;
  text-align: left;
}
.zengo-card.compact .zengo-phrase { font-size: 28px; margin: 0 0 4px; }
.zengo-card.compact .zengo-reading { margin-bottom: 8px; }
.zengo-card.compact .zengo-summary-ja { font-size: 14px; margin-bottom: 6px; }
.zengo-card.compact .zengo-summary-en { font-size: 13px; padding-top: 8px; margin-top: 8px; }
.zengo-date { color: var(--sub); font-size: 13px; letter-spacing: 0.1em; }
.zengo-phrase { font-size: 52px; letter-spacing: 0.12em; margin: 18px 0 8px; }
.zengo-phrase ruby { ruby-align: center; }
.phrase-reading { font-size: 18px; color: var(--sub); letter-spacing: 0.05em; }
.zengo-reading { color: var(--sub); font-size: 15px; margin-bottom: 24px; }
.zengo-summary-ja { font-size: 16px; line-height: 1.9; text-align: left; }
.zengo-summary-en {
  font-size: 14px; line-height: 1.8; color: var(--sub);
  text-align: left; margin-top: 16px; font-family: Georgia, serif;
  border-top: 1px dashed var(--line); padding-top: 16px;
}
.zengo-detail { margin-top: 18px; text-align: left; }
.zengo-detail-ja { font-size: 15px; line-height: 1.85; margin-bottom: 14px; }
.zengo-detail-en {
  font-size: 14px; line-height: 1.8; color: var(--sub);
  font-family: Georgia, serif; border-top: 1px dashed var(--line); padding-top: 14px;
}
.zengo-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 22px; }
.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }

.analysis-controls { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.analysis-result { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; line-height: 1.8; white-space: pre-wrap; }

/* Request */
.request-form { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; margin-bottom: 22px; }
.request-form h2 { margin: 0 0 8px; font-size: 18px; }
.request-form form { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.request-form textarea { resize: vertical; min-height: 80px; padding: 10px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.request-list-title { font-size: 16px; margin-bottom: 10px; }
.request-list { display: flex; flex-direction: column; gap: 8px; }
.request-item { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.request-item .r-message { white-space: pre-wrap; line-height: 1.6; }
.request-item .r-meta { font-size: 12px; color: var(--sub); margin-top: 8px; }
.request-item .r-actions { margin-top: 10px; display: flex; gap: 8px; }
.request-item .r-actions button { padding: 4px 10px; font-size: 13px; border-radius: 8px; }

/* Chat */
.today-discussion { margin-top: 22px; }
.practice-head { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.controls, .tone-wrap {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 4px;
}
.tone { font-size: 13px; color: var(--sub); display: flex; align-items: center; gap: 6px; }
.tone-select {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}
.toggle { font-size: 13px; color: var(--sub); }
.chat-log {
  display: flex; flex-direction: column; gap: 12px;
  min-height: 220px; margin: 12px 0;
}
.bubble {
  max-width: 82%; padding: 12px 16px; border-radius: 16px; line-height: 1.7;
  font-size: 15px; white-space: pre-wrap; word-break: break-word;
}
.bubble.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.bubble.ai { align-self: flex-start; background: var(--card); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.bubble-ja { margin: 8px 0 0; padding-top: 8px; border-top: 1px dashed var(--line); color: var(--sub); font-size: 13px; line-height: 1.6; white-space: pre-wrap; }
.chat-input {
  display: flex; gap: 8px; align-items: flex-end;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 8px;
}
.chat-input textarea {
  flex: 1; resize: none; border: none; outline: none; background: transparent;
  padding: 8px; max-height: 140px; line-height: 1.6;
}
.mic { background: #efe9dd; color: var(--accent); }
.mic.recording { background: #a3402f; color: #fff; animation: pulse 1.1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.55; } }
.status { color: var(--sub); font-size: 13px; min-height: 18px; margin-top: 8px; }

@media (max-width: 860px) {
  .topbar { gap: 8px; }
  .sidebar-toggle { display: inline-block; }
  .zengo-sidebar {
    position: fixed;
    left: 0; top: 56px; bottom: 0;
    z-index: 20;
    transform: translateX(-100%);
    transition: transform 0.2s;
    box-shadow: 4px 0 20px rgba(0,0,0,0.08);
  }
  .zengo-sidebar.open { transform: translateX(0); }
}