:root {
  color-scheme: dark;
  --bg: #0b0c0f;
  --panel: #15161a;
  --line: rgba(255, 255, 255, .08);
  --muted: #9b9ca3;
  --text: #f5f5f7;
  --accent: #0a84ff;
  --green: #30d158;
  --amber: #ffd60a;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif; }
button, select, textarea { font: inherit; }
button { cursor: pointer; }

.app-shell { min-height: 100vh; display: grid; grid-template-rows: 72px 1fr; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 0 28px; border-bottom: 1px solid var(--line); background: rgba(6, 6, 7, .92); }
.brand { color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 11px; background: var(--accent); color: #fff; font-weight: 800; box-shadow: 0 6px 18px rgba(10,132,255,.24); }
.brand small { color: var(--accent); font-size: 12px; font-weight: 700; border: 1px solid rgba(10,132,255,.35); padding: 4px 7px; border-radius: 999px; }
.top-actions { display: flex; gap: 10px; align-items: center; }
.status-pill { color: var(--muted); font-size: 13px; }
.status-pill::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--green); margin-right: 7px; }
.ghost-button, .secondary-button { border: 1px solid #35353c; background: #151519; color: var(--text); border-radius: 10px; padding: 10px 14px; }

.workspace { min-height: calc(100vh - 72px); display: grid; grid-template-columns: 220px minmax(440px, 1fr) 300px; }
.metrics-panel, .feedback-panel { padding: 30px 24px; background: #09090b; }
.metrics-panel { border-right: 1px solid var(--line); }
.feedback-panel { border-left: 1px solid var(--line); }
.panel-label { margin: 0 0 24px; color: #b7b7c0; font-weight: 700; letter-spacing: .04em; }
.metric { display: flex; justify-content: space-between; align-items: baseline; padding: 15px 0; border-bottom: 1px solid #17171b; color: var(--muted); }
.metric strong { font-size: 26px; font-weight: 700; letter-spacing: -.02em; font-variant-numeric: tabular-nums; color: var(--text); }
.metric:nth-of-type(2) strong { color: #ff6767; }
.metric:nth-of-type(3) strong { color: var(--amber); }
.metric:nth-of-type(4) strong { color: #ffd52e; }
.metric:nth-of-type(5) strong { color: var(--green); }
.privacy-note { color: #6f6f78; font-size: 13px; line-height: 1.7; }
.privacy-note { margin-top: 28px; }

.training-panel { min-width: 0; padding: 28px; display: grid; grid-template-rows: auto minmax(380px, 1fr) auto; gap: 18px; }
.training-toolbar { display: flex; align-items: center; gap: 16px; min-width: 0; }
.language-switch { display: flex; padding: 4px; border: 1px solid #34343a; background: #111115; border-radius: 12px; }
.language-button { min-width: 48px; padding: 8px 12px; border: 0; border-radius: 8px; color: var(--muted); background: transparent; }
.language-button.active { color: white; background: var(--accent); font-weight: 700; }
.scenario-field { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; }
.scenario-field select { appearance: none; border: 1px solid #34343a; background: #111115; color: var(--text); border-radius: 10px; padding: 10px 34px 10px 12px; }
.timer { margin-left: auto; color: #8c8c95; font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: .02em; letter-spacing: .06em; }
.transcript-wrap { position: relative; min-height: 0; border: 1px solid rgba(10, 132, 255, .22); border-radius: 18px; background: rgba(0, 0, 0, .22); overflow: hidden; }
#transcript { width: 100%; height: 100%; min-height: 380px; resize: none; border: 0; outline: 0; background: transparent; color: #f0f0f3; padding: 34px; font-size: clamp(22px, 2.3vw, 36px); line-height: 1.65; }
#transcript::placeholder { color: #44444c; }
.listening-indicator { position: absolute; top: 18px; right: 20px; color: var(--green); font-size: 13px; }
.listening-indicator span { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 6px rgba(57, 217, 119, .12); margin-right: 8px; animation: pulse 1.5s infinite; }
.hidden { display: none !important; }
.record-actions { display: flex; align-items: center; justify-content: center; gap: 12px; }
.primary-button { border: 0; border-radius: 999px; background: var(--accent); color: white; padding: 14px 28px; font-weight: 700; box-shadow: 0 8px 24px rgba(10, 132, 255, .24); }
.primary-button.compact { padding: 11px 20px; }
.secondary-button { padding: 13px 20px; }
.text-button { border: 0; background: transparent; color: var(--muted); padding: 12px; }

.feedback-heading { display: flex; justify-content: space-between; align-items: flex-start; }
.favorite-button { border: 0; background: transparent; color: #ffd833; font-size: 24px; padding: 0; }
.feedback-card { --feedback-color: var(--green); border: 1px solid #232329; border-left: 3px solid var(--feedback-color); border-radius: 12px; padding: 18px; background: #0d0d11; transition: border-color .2s ease, background .2s ease; }
.feedback-card[data-tone="ready"] { --feedback-color: #777782; }
.feedback-card[data-tone="hedge"], .feedback-card[data-tone="filler"] { --feedback-color: var(--amber); }
.feedback-card[data-tone="vague"], .feedback-card[data-tone="structure"], .feedback-card[data-tone="evidence"], .feedback-card[data-tone="scene"] { --feedback-color: #63a7ff; }
.feedback-card[data-tone="ai"] { --feedback-color: var(--accent); }
.feedback-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.feedback-label { color: var(--feedback-color); font-size: 13px; font-weight: 800; }
.feedback-live { color: #686872; font-size: 11px; white-space: nowrap; }
.feedback-live i { display: inline-block; width: 6px; height: 6px; margin-right: 4px; border-radius: 50%; background: var(--green); }
.feedback-card > #feedback-text { margin: 14px 0 0; color: #f0f0f3; font-size: 17px; line-height: 1.7; }
.feedback-tip { margin: 14px 0 0; padding-top: 13px; border-top: 1px solid #222228; color: #8f8f9a; font-size: 13px; line-height: 1.65; }

.modal { width: min(620px, calc(100vw - 32px)); border: 1px solid #303038; border-radius: 20px; padding: 0; background: #0c0c0f; color: var(--text); box-shadow: 0 28px 100px rgba(0, 0, 0, .65); }
.modal::backdrop { background: rgba(0, 0, 0, .78); backdrop-filter: blur(5px); }
.modal-card { padding: 28px; }
.modal-heading { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 24px; }
.modal-heading h2 { margin: 5px 0 0; font-size: 30px; }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 800; }
.close-button { border: 0; background: transparent; color: var(--muted); font-size: 30px; }
.summary-item { border-left: 3px solid; padding: 2px 0 2px 18px; margin: 22px 0; }
.summary-item span { font-size: 13px; font-weight: 800; }
.summary-overview { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; overflow: hidden; margin: 4px 0 28px; border: 1px solid #26262d; border-radius: 12px; background: #26262d; }
.summary-overview div { display: grid; gap: 5px; justify-items: center; padding: 14px 8px; background: #111115; }
.summary-overview strong { font-size: 23px; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text); }
.summary-overview span { color: var(--muted); font-size: 12px; }
.summary-item ul { margin: 8px 0 0; padding-left: 20px; font-size: 16px; line-height: 1.65; }
.summary-item li + li { margin-top: 5px; }
.summary-item.good { border-color: var(--green); } .summary-item.good span { color: var(--green); }
.summary-item.problem { border-color: var(--amber); } .summary-item.problem span { color: var(--amber); }
.summary-item.next { border-color: var(--accent); } .summary-item.next span { color: var(--accent); }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 30px; }
.library-list { display: grid; gap: 10px; max-height: 420px; overflow: auto; }
.library-entry { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 16px; border: 1px solid #25252b; border-radius: 12px; }
.library-entry p { margin: 0; line-height: 1.55; }
.library-entry small { display: block; color: var(--muted); margin-top: 8px; }
.library-entry button { border: 0; background: transparent; color: #ff7777; }
.empty-library { text-align: center; color: var(--muted); padding: 50px 0; }
.settings-card { max-height: min(860px, 90vh); overflow: auto; }
.settings-warning { color: #d7b16c; background: #1b1710; border: 1px solid #4f3a19; border-radius: 10px; padding: 12px 14px; font-size: 13px; line-height: 1.65; }
.settings-card fieldset { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; margin: 18px 0; padding: 18px; border: 1px solid #292930; border-radius: 12px; }
.settings-card legend { padding: 0 8px; color: var(--text); font-weight: 800; }
.settings-card label { display: grid; gap: 7px; color: var(--muted); font-size: 12px; }
.settings-card label:last-child { grid-column: 1 / -1; }
.settings-card input { width: 100%; border: 1px solid #34343b; background: #111115; color: var(--text); border-radius: 9px; padding: 11px 12px; outline: 0; }
.settings-card input:focus { border-color: var(--accent); }
.settings-message { min-height: 20px; color: var(--green); font-size: 13px; }
.settings-actions { align-items: center; }
.text-button.danger { color: #ff7777; margin-right: auto; }

@keyframes pulse { 50% { opacity: .45; transform: scale(.8); } }

@media (max-width: 1000px) {
  .workspace { grid-template-columns: 170px minmax(0, 1fr); }
  .feedback-panel { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 700px) {
  .app-shell { grid-template-rows: 64px 1fr; }
  .topbar { padding: 0 16px; }
  .status-pill { display: none; }
  .workspace { display: block; }
  .metrics-panel { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 14px 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .metrics-panel .panel-label, .privacy-note { display: none; }
  .metric { display: grid; justify-items: center; gap: 4px; padding: 6px 0; border: 0; font-size: 11px; }
  .metric strong { font-size: 21px; }
  .training-panel { padding: 16px; grid-template-rows: auto minmax(360px, 58vh) auto; }
  .training-toolbar { flex-wrap: wrap; }
  .scenario-field span { display: none; }
  .timer { font-size: 20px; }
  #transcript { padding: 24px; font-size: 22px; min-height: 360px; }
  .feedback-panel { padding: 22px 18px; }
  .modal-actions { flex-direction: column; }
  .summary-overview { grid-template-columns: repeat(2, 1fr); }
  .settings-card fieldset { grid-template-columns: 1fr; }
  .settings-card label:last-child { grid-column: auto; }
}

@media print { .topbar, .metrics-panel, .record-actions, .feedback-panel { display: none; } .workspace { display: block; } .training-panel { padding: 0; } }