:root {
  color-scheme: light;
  --bg: #eef4f8;
  --panel: #ffffff;
  --text: #14212b;
  --muted: #637381;
  --line: #d8e3ea;
  --primary: #176b87;
  --primary-dark: #0f5065;
  --accent: #ffb703;
  --danger: #c2410c;
  --shadow: 0 18px 50px rgba(20, 33, 43, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(145deg, #f8fbfd 0%, var(--bg) 100%);
  color: var(--text);
}

button {
  font: inherit;
}

.app {
  width: min(960px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  place-items: center;
  padding: 32px 0;
}

.practice-panel {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 32px;
}

.top-bar,
.result-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand-logo {
  width: 64px;
  height: 64px;
  flex: 0 0 auto;
  border-radius: 8px;
}

.eyebrow,
.section-label {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
}

.status-pill,
#recordingState {
  flex: 0 0 auto;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.status-pill.recording,
#recordingState.recording {
  border-color: #fed7aa;
  color: var(--danger);
  background: #fff7ed;
}

.question-box,
.timer-area,
.result-box {
  margin-top: 28px;
}

.question-box {
  min-height: 210px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #fbfdff;
}

.question-box h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.35;
}

.question-box.long-question h2 {
  font-size: clamp(20px, 2.35vw, 30px);
}

.question-box.very-long-question h2 {
  font-size: clamp(18px, 1.85vw, 24px);
  line-height: 1.42;
}

.timer-card {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}

.timer-card p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  font-weight: 700;
}

.timer-card strong {
  font-variant-numeric: tabular-nums;
  font-size: clamp(44px, 8vw, 72px);
  line-height: 1;
}

.progress-track {
  height: 12px;
  margin-top: 18px;
  overflow: hidden;
  border-radius: 999px;
  background: #e6eef3;
}

.progress-bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.25s linear;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-btn,
.secondary-btn {
  min-height: 52px;
  border: 0;
  border-radius: 8px;
  padding: 0 24px;
  cursor: pointer;
  font-weight: 800;
  white-space: nowrap;
}

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

.primary-btn:hover {
  background: var(--primary-dark);
}

.secondary-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.secondary-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.interview-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.order-panel {
  grid-column: 1 / -1;
}

.guide-panel,
.history-panel {
  display: none;
}

.tool-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: #fbfdff;
}

.tool-panel h3 {
  margin: 0;
  font-size: 22px;
}

#cameraState,
.guide-panel .result-header span,
#reservedQuestionState,
#historyCount {
  flex: 0 0 auto;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.reservation-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
  align-items: center;
}

.result-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  align-items: center;
}

.mini-btn {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--primary);
  padding: 0 12px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.mini-btn:hover {
  border-color: var(--primary);
}

.question-picker-label {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.question-picker {
  width: 100%;
  min-height: 48px;
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 0 48px 0 12px;
  font: inherit;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--primary) 50%),
    linear-gradient(135deg, var(--primary) 50%, transparent 50%);
  background-position:
    calc(100% - 22px) 50%,
    calc(100% - 14px) 50%;
  background-repeat: no-repeat;
  background-size: 8px 8px, 8px 8px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reserve-btn {
  margin-top: 12px;
}

.camera-preview,
.recorded-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-top: 18px;
  border-radius: 8px;
  background: #10212b;
  object-fit: cover;
}

.check-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  line-height: 1.6;
}

.check-list li {
  position: relative;
  padding-left: 24px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
}

.check-list li.passed {
  color: var(--primary);
  font-weight: 700;
}

.check-list li.passed::before {
  background: var(--primary);
}

.guide-content,
.feedback-box,
.history-list {
  margin-top: 18px;
  border-radius: 8px;
  background: #f6f9fb;
  color: var(--muted);
  padding: 18px;
  line-height: 1.65;
}

.guide-content h4,
.feedback-box h4,
.history-item strong {
  margin: 0 0 8px;
  color: var(--text);
}

.guide-content ul,
.feedback-box ul {
  margin: 8px 0 16px;
  padding-left: 20px;
}

.guide-content li,
.feedback-box li {
  margin: 6px 0;
}

.history-list {
  display: grid;
  gap: 12px;
}

.history-item {
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.history-item-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.delete-record-btn {
  min-height: 30px;
  border: 1px solid #fed7aa;
  border-radius: 999px;
  background: #fff7ed;
  color: var(--danger);
  padding: 0 12px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.delete-record-btn:hover {
  border-color: var(--danger);
}

.history-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.history-item p {
  margin: 6px 0 0;
}

.history-item b {
  color: var(--text);
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 24px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 33, 43, 0.32);
}

.modal-panel {
  position: relative;
  width: min(760px, 100%);
  max-height: min(720px, calc(100vh - 48px));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 22px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.modal-header h2 {
  margin: 0;
  font-size: 24px;
}

.modal-body {
  max-height: calc(min(720px, 100vh - 48px) - 94px);
  overflow: auto;
}

.result-box {
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.result-box h3 {
  margin: 0;
  font-size: 22px;
}

audio {
  width: 100%;
  margin-top: 18px;
}

.placeholder,
#transcriptText {
  margin: 18px 0 0;
  min-height: 92px;
  border-radius: 8px;
  background: #f6f9fb;
  color: var(--muted);
  padding: 18px;
  line-height: 1.65;
  white-space: pre-wrap;
}

@media (max-width: 640px) {
  .app {
    width: min(100% - 20px, 960px);
    padding: 10px 0;
    align-items: start;
  }

  .practice-panel {
    padding: 20px;
  }

  .top-bar,
  .result-header,
  .timer-card {
    flex-direction: column;
  }

  .interview-tools {
    grid-template-columns: 1fr;
  }

  .brand {
    align-items: flex-start;
  }

  .brand-logo {
    width: 52px;
    height: 52px;
  }

  .question-box {
    min-height: 240px;
    padding: 20px;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }
}

@media (min-width: 900px) {
  body {
    height: 100vh;
    overflow: hidden;
  }

  .app {
    width: min(1440px, calc(100vw - 24px));
    height: 100vh;
    min-height: 0;
    padding: 12px 0;
  }

  .practice-panel {
    height: calc(100vh - 24px);
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(270px, 0.72fr) minmax(0, 1.18fr) minmax(0, 1.18fr);
    grid-template-rows: auto minmax(0, 1.24fr) minmax(150px, 0.52fr) minmax(150px, 0.5fr);
    grid-template-areas:
      "top top top"
      "video question question"
      "video timer timer"
      "order controls result";
    column-gap: 14px;
    row-gap: 8px;
    padding: 18px;
    overflow: hidden;
  }

  .top-bar {
    grid-area: top;
    align-items: center;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  .eyebrow,
  .section-label {
    margin-bottom: 4px;
    font-size: 12px;
  }

  h1 {
    font-size: 26px;
  }

  .status-pill,
  #recordingState,
  #cameraState,
  .guide-panel .result-header span,
  #reservedQuestionState,
  #historyCount {
    padding: 7px 12px;
    font-size: 13px;
  }

  .question-box,
  .timer-area,
  .result-box,
  .interview-tools,
  .controls {
    margin-top: 0;
  }

  .interview-tools {
    display: contents;
  }

  .video-panel {
    grid-area: video;
  }

  .guide-panel {
    display: none;
  }

  .order-panel {
    grid-area: order;
    align-self: stretch;
    overflow: visible;
  }

  .question-box {
    grid-area: question;
    min-height: 0;
    padding: 38px 40px;
    overflow: auto;
  }

  .question-box h2 {
    font-size: clamp(34px, 3.2vw, 52px);
    line-height: 1.28;
  }

  .question-box.long-question h2 {
    font-size: clamp(26px, 2.45vw, 38px);
    line-height: 1.34;
  }

  .question-box.very-long-question h2 {
    font-size: clamp(22px, 1.95vw, 30px);
    line-height: 1.42;
  }

  .timer-area {
    grid-area: timer;
    align-self: stretch;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fbfdff;
    padding: 24px 28px;
  }

  .timer-card strong {
    font-size: clamp(70px, 6.4vw, 108px);
  }

  .progress-track {
    margin-top: 14px;
  }

  .controls {
    grid-area: controls;
    align-self: stretch;
    display: grid;
    grid-template-columns: repeat(4, minmax(120px, 1fr));
    gap: 10px;
  }

  .primary-btn,
  .secondary-btn {
    min-height: 48px;
    padding: 0 14px;
  }

  .tool-panel,
  .result-box {
    min-height: 0;
    padding: 14px;
    overflow: hidden;
  }

  .tool-panel h3,
  .result-box h3 {
    font-size: 18px;
  }

  .result-header {
    gap: 10px;
    align-items: flex-start;
  }

  .reservation-actions {
    gap: 6px;
  }

  .mini-btn {
    min-height: 32px;
    padding: 0 10px;
  }

  .camera-preview {
    height: min(34vh, 310px);
    aspect-ratio: auto;
    margin-top: 14px;
  }

  .check-list {
    margin-top: 12px;
    font-size: 14px;
  }

  .question-picker-label {
    margin-top: 12px;
  }

  .question-picker {
    min-height: 46px;
    font-size: 15px;
  }

  .reserve-btn {
    width: 100%;
    margin-top: 10px;
  }

  .guide-content,
  .feedback-box,
  .history-list,
  .placeholder,
  #transcriptText {
    margin-top: 12px;
    padding: 14px;
    font-size: 14px;
    line-height: 1.55;
  }

  .guide-content {
    max-height: calc(100% - 58px);
    overflow: auto;
  }

  .answer-result {
    grid-area: result;
  }

  .history-panel {
    display: none;
  }

  .answer-result,
  .history-panel {
    border-top: 0;
  }

  .recorded-video {
    height: 120px;
    aspect-ratio: auto;
    margin-top: 12px;
  }

  audio {
    margin-top: 12px;
  }

  .placeholder,
  #transcriptText {
    min-height: 0;
    max-height: 96px;
    overflow: auto;
  }

  .feedback-box {
    max-height: 90px;
    overflow: auto;
  }

  .history-list {
    max-height: calc(100% - 58px);
    overflow: auto;
  }

  .history-item {
    padding-bottom: 10px;
  }

  .history-item p {
    white-space: normal;
  }
}

@media (max-width: 899px) {
  body {
    overflow: auto;
  }
}

@media (min-width: 900px) and (max-width: 1180px) {
  .practice-panel {
    grid-template-columns: minmax(240px, 0.68fr) minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: auto minmax(0, 0.98fr) minmax(125px, 0.42fr) minmax(125px, 0.38fr);
  }

  .question-box {
    padding: 26px 22px;
  }

  .question-box h2 {
    font-size: clamp(28px, 3vw, 42px);
  }

  .question-box.long-question h2 {
    font-size: clamp(24px, 2.5vw, 32px);
  }

  .question-box.very-long-question h2 {
    font-size: clamp(20px, 2.1vw, 26px);
  }

  .controls {
    grid-template-columns: repeat(4, minmax(120px, 1fr));
  }
}