:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #1f2329;
  --muted: #646a73;
  --line: #e5e6e8;
  --accent: #3d7eff;
  --accent-deep: #2563eb;
  --accent-soft: rgba(61, 126, 255, 0.08);
  --olive: #1f2329;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button, input, select, textarea {
  font: inherit;
}

.page {
  display: none;
  min-height: 100vh;
}

.page.active {
  display: block;
}

.shell {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
  position: relative;
  z-index: 1;
}

/* ─── User Bar ─── */

.user-bar {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  z-index: 100;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--surface);
  border-bottom-left-radius: var(--radius);
  border: 1px solid var(--line);
  border-top: none;
  border-right: none;
  box-shadow: var(--shadow-sm);
}

.user-bar.visible {
  display: flex;
}

.user-bar-name {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--ink);
}

.user-bar .btn-ghost {
  padding: 4px 10px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.user-bar.visible ~ #page-container {
  margin-top: 44px;
}

/* ─── Login ─── */

.shell-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: grid;
  gap: 24px;
}

.login-header {
  display: grid;
  gap: 8px;
  text-align: center;
}

.login-header h1 {
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
}

.login-header .subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.login-form {
  display: grid;
  gap: 16px;
}

.login-form .control-group {
  margin-top: 0;
}

.control-group {
  display: grid;
  gap: 6px;
}

.control-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
}

.control-group input,
.control-group select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.control-group input:focus,
.control-group select:focus,
.input-area input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field-note {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.login-form .btn-primary {
  margin-top: 4px;
}

.btn-primary {
  width: 100%;
  border: none;
  border-radius: var(--radius);
  padding: 11px 20px;
  color: #fff;
  background: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary,
.btn-ghost {
  border: none;
  cursor: pointer;
  transition: background 0.2s;
  width: auto;
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.85rem;
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  background: rgba(0, 0, 0, 0.04);
}

.auth-error {
  color: #e53e3e;
  background: rgba(229, 62, 62, 0.06);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  line-height: 1.5;
}

.auth-toggle {
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.auth-toggle a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.auth-toggle a:hover {
  text-decoration: underline;
}

/* ─── Home ─── */

.page-topbar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.shell-home {
  padding-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.home-intro {
  display: grid;
  gap: 16px;
}

.home-intro h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

.home-intro .subtitle {
  max-width: 600px;
}

.subtitle {
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.92rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-sm);
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.launch-panel {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.launch-grid {
  display: flex;
  gap: 20px;
  align-items: stretch;
  flex-wrap: nowrap;
}

.launch-block {
  flex: 1 1 0;
  min-width: 0;
}

.panel-kicker {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.panel-heading h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 10px 0 6px;
  line-height: 1.3;
}

.panel-heading p {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.launch-block-setup .control-group {
  margin-top: 18px;
}

.profile-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.profile-form .control-group {
  margin-top: 0;
}

.launch-block-setup .btn-primary {
  margin-top: 20px;
}

.mission-grid {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.mission-grid div {
  display: grid;
  gap: 4px;
}

.mission-grid dt {
  color: var(--muted);
  font-size: 0.8rem;
}

.mission-grid dd {
  font-size: 0.95rem;
  font-weight: 500;
}

.brief-list {
  list-style: none;
  counter-reset: brief;
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.brief-list li {
  padding: 12px 14px 12px 40px;
  position: relative;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--muted);
}

.brief-list li::before {
  content: counter(brief);
  counter-increment: brief;
  position: absolute;
  left: 14px;
  top: 12px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--accent);
}

/* ─── Call Page ─── */

.shell-call {
  width: min(1200px, calc(100% - 24px));
  padding-top: 20px;
}

.call-header {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.scene-info,
.call-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.scene-label,
.timer-label,
.call-status-badge,
.call-status-text {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.scene-stack {
  display: grid;
  gap: 2px;
}

.scene-name {
  font-weight: 600;
  font-size: 1rem;
}

.scene-brief {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.difficulty-badge {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.8rem;
  white-space: nowrap;
}

.call-duration {
  font-variant-numeric: tabular-nums;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
}

.call-main {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 360px);
  gap: 16px;
  height: calc(100vh - 140px);
  min-height: 520px;
}

.chat-section,
.phone-mockup {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  min-height: 0;
  overflow: hidden;
}

.section-heading {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.section-heading span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.section-heading strong {
  font-size: 1.1rem;
  font-weight: 600;
}

.chat-messages {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg);
}

.chat-messages::-webkit-scrollbar {
  width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
  background: var(--bg);
  border-radius: 999px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 999px;
}

.chat-placeholder {
  margin: auto 0;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px dashed var(--line);
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
}

.chat-placeholder strong {
  font-weight: 600;
  color: var(--ink);
  font-size: 1rem;
}

.chat-placeholder-label {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.message {
  max-width: min(80%, 600px);
  padding: 12px 14px;
  border-radius: var(--radius);
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.message-meta {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.7;
}

.user-message {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.user-message .message-meta {
  color: rgba(255, 255, 255, 0.7);
}

.ai-message {
  align-self: flex-start;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
}

.ai-message .message-meta {
  color: var(--muted);
}

.input-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.input-area input {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 10px 14px;
  font-size: 0.9rem;
}

.input-area input::placeholder {
  color: #999;
}

.input-area button {
  width: auto;
  margin-top: 0;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.input-area button:hover {
  background: var(--accent-deep);
}

/* ─── Phone Mockup ─── */

.phone-section {
  display: flex;
}

.phone-mockup {
  width: 100%;
  justify-content: space-between;
  gap: 16px;
}

.phone-screen {
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #f0f4ff 0%, #e8edf8 100%);
  min-height: 360px;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.phone-header {
  display: grid;
  gap: 4px;
}

.caller-name {
  font-size: 1.3rem;
  font-weight: 600;
}

.call-status-text {
  font-size: 0.82rem;
}

.audio-visualizer {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.audio-bar {
  width: 6px;
  height: 14px;
  border-radius: 999px;
  background: var(--accent);
  animation: audioWave 1s ease-in-out infinite;
}

.audio-bar:nth-child(2n) {
  animation-delay: 0.16s;
}

.audio-bar:nth-child(3n) {
  animation-delay: 0.28s;
}

.audio-visualizer.paused .audio-bar {
  animation-play-state: paused;
  opacity: 0.25;
  height: 8px;
}

.audio-visualizer.active .audio-bar {
  animation-duration: 0.44s;
}

@keyframes audioWave {
  0%, 100% {
    height: 14px;
    opacity: 0.3;
  }
  50% {
    height: 56px;
    opacity: 1;
  }
}

.speech-status {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 8px;
}

.coach-note {
  padding: 16px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  text-align: left;
}

.coach-note-label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.coach-note p {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.hangup-btn {
  width: 100%;
  border: none;
  border-radius: var(--radius);
  padding: 12px 18px;
  background: #e53e3e;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.2s, transform 0.15s;
  box-shadow: 0 4px 12px rgba(229, 62, 62, 0.25);
}

.hangup-btn:hover {
  background: #c53030;
  transform: translateY(-1px);
}

/* ─── Summary Page ─── */

.shell-summary {
  padding-top: 32px;
}

.summary-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 24px;
}

.summary-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin: 8px 0 4px;
}

.summary-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.summary-chip {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  min-width: 100px;
  box-shadow: var(--shadow-sm);
}

.summary-chip span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.summary-chip strong {
  display: block;
  margin-top: 6px;
  font-size: 1rem;
  font-weight: 600;
}

.summary-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

.summary-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.summary-card-wide {
  grid-column: 1 / -1;
}

.summary-card-half {
  min-width: 0;
}

.summary-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.summary-card-note {
  margin: -8px 0 18px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.6;
}

.evaluation-content {
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.92rem;
}

.summary-list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.summary-list li {
  padding: 12px 14px 12px 40px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  position: relative;
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--muted);
}

.summary-list li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.conversation-record {
  display: grid;
  gap: 12px;
  max-height: 520px;
  overflow-y: auto;
  padding-right: 6px;
}

.conversation-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.conversation-row.customer {
  background: #f7faf8;
}

.conversation-speaker {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
}

.conversation-row.customer .conversation-speaker {
  color: var(--muted);
}

.conversation-content {
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.conversation-empty {
  padding: 20px;
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--muted);
  text-align: center;
}

.advice-panel {
  border-color: rgba(19, 112, 80, 0.24);
  background: linear-gradient(145deg, var(--surface), #f5faf7);
}

.targeted-advice-list {
  list-style: none;
  counter-reset: advice;
  display: grid;
  gap: 12px;
}

.targeted-advice-list li {
  counter-increment: advice;
  position: relative;
  padding: 15px 16px 15px 52px;
  border: 1px solid rgba(19, 112, 80, 0.16);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.7;
}

.targeted-advice-list li::before {
  content: counter(advice);
  position: absolute;
  left: 16px;
  top: 14px;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
}

.summary-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.summary-actions button {
  width: 100%;
  margin-top: 0;
}

.btn-secondary {
  padding: 12px 18px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

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

/* ─── Score Grid ─── */

.score-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 8px;
}

.score-card {
  padding: 16px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.score-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.score-label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--ink);
}

.score-num {
  font-variant-numeric: tabular-nums;
}

.score-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.score-max {
  font-size: 0.75rem;
  color: var(--muted);
}

.score-track {
  height: 4px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.score-bar {
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.score-desc {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ─── Responsive ─── */

@media (max-width: 900px) {
  .call-main,
  .summary-layout {
    grid-template-columns: 1fr;
  }
  .call-main {
    height: auto;
    min-height: 0;
  }
  .score-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 780px) {
  .shell {
    width: min(calc(100% - 20px), 100%);
    padding-top: 20px;
    padding-bottom: 28px;
  }

  .launch-panel,
  .launch-block,
  .call-header,
  .chat-section,
  .phone-mockup,
  .summary-card {
    padding: 16px;
  }

  .home-intro h1,
  .summary-header h1 {
    font-size: clamp(1.4rem, 8vw, 2rem);
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .launch-grid {
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .profile-form {
    grid-template-columns: 1fr;
  }

  .conversation-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .summary-actions {
    grid-template-columns: 1fr;
  }

  .launch-block {
    min-width: 260px;
  }

  .call-header,
  .scene-info,
  .call-meta,
  .summary-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .input-area {
    grid-template-columns: 1fr;
  }

  .phone-screen {
    min-height: 280px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}