* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --bg-image: url("https://images.unsplash.com/photo-1547238899-b5fcc6adf701?q=80&w=3270&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D");
  --bg: #a61212;
  --bg-grad: linear-gradient(135deg, #b71c1c 0%, #7f0000 100%);
  --card: #ffffff;
  --card-border: #e5e7eb;
  --card2: #fff5f5;
  --accent: #d32f2f;
  --gold: #f59e0b;
  --green: #2e7d32;
  --red: #d32f2f;
  --txt: #2c1a1a;
  --txt2: #5c4a4a;
  --glass: rgba(211, 47, 47, 0.05);
  --radius: 16px;
}
iconify-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
}
.ui-icon {
  flex-shrink: 0;
}
.icon-text {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
}
body {
  font-family: "Noto Sans SC", sans-serif;
  background-color: #280d0d;
  position: relative;
  color: var(--txt);
  min-height: 100vh;
  isolation: isolate;
}
body::before {
  content: "";
  position: fixed;
  inset: -12px;
  background-image: var(--bg-image);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  filter: blur(8px) brightness(0.8);
  transform: translateZ(0) scale(1.03);
  transform-origin: center;
  will-change: transform;
  pointer-events: none;
  z-index: -1;
}
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 16px;
}
/* ===== PAGE 1: LANDING ===== */
#page1 {
  min-height: 100vh;
  background: transparent;
  position: relative;
  overflow: hidden;
}
@supports (height: 100svh) {
  body,
  #page1 {
    min-height: 100svh;
  }
}
.landing-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 30px 20px 40px;
  position: relative;
  z-index: 1;
}
.landing-header {
  margin-bottom: 28px;
  text-align: center;
}
.chinese-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  padding: 6px 18px;
  margin-bottom: 16px;
}
.chinese-badge span {
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  letter-spacing: 1px;
}
.flag-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.flag-icon .ui-icon {
  font-size: 20px;
}
.main-title {
  color: white;
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  margin-bottom: 6px;
  line-height: 1.2;
}
.main-title .hsk-num {
  color: var(--gold);
  font-size: 1.2em;
}
.main-subtitle {
  color: rgba(255, 255, 255, 0.95);
  font-size: 16px;
  font-weight: 400;
}
.landing-card {
  background: white;
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 18px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}
.landing-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.landing-card-title .title-icon {
  font-size: 1.1em;
}
.landing-card-title::before {
  content: "";
  display: block;
  width: 4px;
  height: 20px;
  background: var(--red);
  border-radius: 2px;
}
.exam-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.info-box {
  background: linear-gradient(135deg, #fff5f5, #fff);
  border: 1px solid #ffd7d7;
  border-radius: 14px;
  padding: 14px 10px;
  text-align: center;
}
.info-box .icon {
  display: flex;
  justify-content: center;
  color: var(--red);
  margin-bottom: 6px;
}
.info-box .icon .ui-icon {
  font-size: 22px;
}
.info-box .label {
  font-size: 12px;
  color: #4b5563;
  margin-bottom: 4px;
}
.info-box .value {
  font-size: 18px;
  font-weight: 700;
  color: var(--red);
}
.info-box .unit {
  font-size: 11px;
  color: #4b5563;
}
.section-table {
  width: 100%;
  border-collapse: collapse;
}
.section-table th {
  background: var(--red);
  color: white;
  padding: 10px 14px;
  text-align: left;
  font-size: 14px;
  font-weight: 600;
}
.section-table th:first-child {
  border-radius: 10px 0 0 0;
}
.section-table th:last-child {
  border-radius: 0 10px 0 0;
}
.section-table td {
  padding: 10px 14px;
  font-size: 14px;
  border-bottom: 1px solid #f3f4f6;
  color: #1f2937;
}
.section-table tr:last-child td {
  border-bottom: none;
}
.section-table tr:nth-child(even) td {
  background: #fafafa;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.tag-listen {
  background: #dbeafe;
  color: #1d4ed8;
}
.tag-read {
  background: #dcfce7;
  color: #166534;
}
.tag-write {
  background: #fef3c7;
  color: #92400e;
}
.pass-info {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, #fff7ed, #fffbeb);
  border: 1px solid #fed7aa;
  border-radius: 14px;
  padding: 16px;
}
.pass-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
}
.pass-icon .ui-icon {
  font-size: 32px;
}
.pass-text .title {
  font-weight: 700;
  color: var(--gold);
  font-size: 16px;
}
.pass-text .detail {
  font-size: 13px;
  color: #4b5563;
  margin-top: 3px;
  line-height: 1.5;
}
.name-section {
  margin-top: 4px;
  text-align: left;
}
.name-label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 8px;
}
.name-input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 16px;
  font-family: inherit;
  color: #1f2937;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
  outline: none;
}
.name-input:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}
.name-input::placeholder {
  color: #6b7280;
  opacity: 1;
}
.name-hint {
  font-size: 13px;
  color: #6b7280;
  margin-top: 6px;
}
.btn-start {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, var(--red), #b8221c);
  color: white;
  border: none;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 1px;
  box-shadow: 0 4px 20px rgba(192, 57, 43, 0.4);
  margin-top: 18px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-start:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(192, 57, 43, 0.5);
}
.btn-start:not(:disabled):active {
  transform: translateY(0);
}
.btn-start:disabled {
  background: linear-gradient(135deg, #ccc, #aaa);
  cursor: not-allowed;
  box-shadow: none;
}
.btn-start .btn-icon {
  margin-right: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-start .btn-icon .ui-icon {
  font-size: 1.15em;
}
.creator-showcase {
  display: grid;
  width: min(100%, 740px);
  margin-inline: auto;
  padding: 22px 20px;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 330px);
  gap: 18px;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(
      circle at top right,
      rgba(245, 158, 11, 0.24),
      transparent 34%
    ),
    linear-gradient(135deg, #fffaf5 0%, #fff 52%, #fff4f4 100%);
  border: 1px solid rgba(211, 47, 47, 0.12);
}
.creator-copy {
  position: relative;
  z-index: 1;
  max-width: 360px;
}
.creator-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(211, 47, 47, 0.08);
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.creator-name {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.05;
  color: #7f0000;
  margin-bottom: 10px;
}
.creator-desc {
  font-size: 13px;
  line-height: 1.6;
  color: #4b5563;
  max-width: 34ch;
}
.creator-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.creator-pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(127, 0, 0, 0.06);
  color: #7f0000;
  font-size: 12px;
  font-weight: 600;
}
.creator-pill.is-credit {
  background: rgba(245, 158, 11, 0.14);
  color: #9a6700;
}
.creator-model-shell {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 320px);
  min-height: 286px;
  padding: 22px 18px 14px;
  justify-self: center;
  border-radius: 22px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.9),
    rgba(255, 245, 245, 0.68)
  );
  border: 1px solid rgba(245, 158, 11, 0.25);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}
.creator-model-shell::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 18px;
  background:
    radial-gradient(
      circle at 50% 32%,
      rgba(245, 158, 11, 0.22),
      transparent 48%
    ),
    linear-gradient(160deg, rgba(211, 47, 47, 0.08), rgba(255, 255, 255, 0));
}
.creator-model {
  --model-offset-x: 12px;
  position: relative;
  display: block;
  width: min(100%, 248px);
  height: auto;
  margin-inline: auto;
  justify-self: center;
  filter: drop-shadow(0 20px 30px rgba(127, 0, 0, 0.25));
  transform: translateX(var(--model-offset-x));
  transform-origin: center bottom;
  animation: floatModel 4.6s ease-in-out infinite;
}
.creator-caption {
  position: relative;
  margin-top: 12px;
  font-size: 12px;
  color: #6b7280;
  text-align: center;
}
.site-footer {
  max-width: 1000px;
  margin: 0 auto 24px;
  padding: 0 16px 24px;
}
.site-footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 20px 24px;
  background: rgba(24, 8, 8, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f59e0b, #d32f2f);
  color: white;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.06em;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.18);
}
.footer-mark .ui-icon {
  font-size: 32px;
}
.footer-title {
  color: white;
  font-size: 16px;
  font-weight: 700;
}
.footer-subtitle {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 13px;
  line-height: 1.6;
}
.footer-credit {
  text-align: right;
}
.footer-credit-line {
  color: white;
  font-size: 14px;
  font-weight: 700;
}
.footer-credit-note {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 12px;
  line-height: 1.6;
}
@keyframes floatModel {
  0%,
  100% {
    transform: translate3d(var(--model-offset-x), 0, 0);
  }
  50% {
    transform: translate3d(var(--model-offset-x), -8px, 0);
  }
}
/* Audio Preload Progress */
.preload-status {
  margin-top: 14px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  text-align: center;
  transition: all 0.4s;
}
.preload-status.done {
  background: rgba(46, 125, 50, 0.4); /* Stronger green */
  border-color: rgba(76, 175, 80, 0.6);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}
.preload-status.done .preload-label {
  color: #111111;
  font-weight: 600;
  text-shadow: none;
}
.preload-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.preload-label .spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.preload-bar-bg {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  overflow: hidden;
}
.preload-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
  border-radius: 3px;
  transition: width 0.3s ease;
}
.preload-status.done .preload-bar-fill {
  background: linear-gradient(90deg, #2e7d32, #4caf50);
}
/* Section Nav */
.sec-nav {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 0;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e5e7eb;
  padding: 12px 16px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}
.sec-nav-btn {
  padding: 10px 20px;
  border: 2px solid #eaeaea;
  border-radius: 12px;
  font-size: 0.9em;
  font-weight: 700;
  cursor: default;
  transition: all 0.3s;
  font-family: inherit;
  background: transparent;
  color: var(--txt2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.sec-nav-btn .sub {
  font-size: 0.65em;
  font-weight: 500;
  opacity: 0.85;
}
.sec-nav-btn .icon-text {
  justify-content: center;
}
.sec-nav-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(211, 47, 47, 0.08);
  box-shadow: 0 0 20px rgba(211, 47, 47, 0.1);
}
.sec-nav-btn.completed {
  border-color: var(--green);
  color: var(--green);
  background: rgba(46, 125, 50, 0.06);
}
.sec-nav-btn.locked {
  opacity: 0.65;
}
/* Question Area */
#questionArea {
  min-height: 400px;
  padding-top: 80px;
}
.q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 10px;
  font-size: 0.85em;
  font-weight: 700;
  color: #1a1a1a;
}
.part-name {
  color: var(--txt2);
  font-size: 0.85em;
  margin-left: 10px;
}
.q-counter {
  font-size: 1.4em;
  font-weight: 900;
  color: var(--red);
}
/* Resume Modal */
.resume-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}
.resume-modal {
  background: white;
  padding: 30px;
  border-radius: var(--radius);
  max-width: 400px;
  width: 90%;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.3s ease-out;
  pointer-events: auto;
}
.resume-btn {
  margin-top: 12px;
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  font-weight: bold;
  border: none;
  cursor: pointer;
  font-size: 1em;
  transition: all 0.2s;
  appearance: none;
  -webkit-appearance: none;
  touch-action: manipulation;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-continue {
  background: var(--red);
  color: white;
  box-shadow: 0 4px 10px rgba(211, 47, 47, 0.3);
}
.btn-continue:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(211, 47, 47, 0.4);
}
.btn-restart {
  background: #f3f4f6;
  color: var(--txt2);
}
.btn-restart:hover {
  background: #e5e7eb;
  color: var(--txt);
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Timer bar */
.q-timer-bar {
  display: flex;
  justify-content: space-around;
  background: var(--card);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
}
.timer-item {
  text-align: center;
}
.timer-label {
  display: block;
  font-size: 0.7em;
  color: var(--txt2);
  margin-bottom: 2px;
}
.timer-val {
  font-size: 1.3em;
  font-weight: 900;
  color: var(--green);
}
/* Progress */
.q-progress-bar {
  height: 3px;
  background: var(--glass);
  border-radius: 2px;
  margin-bottom: 16px;
  overflow: hidden;
}
.q-progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.4s;
}
/* Question Card */
.q-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  border: 2px solid var(--card-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}
.q-top {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.q-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  font-weight: 900;
  font-size: 0.9em;
  flex-shrink: 0;
}
.tts-btn {
  background: #ffffff;
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85em;
  font-weight: 700;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
}
.tts-btn:hover {
  transform: scale(1.02);
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.2);
}
.audio-text {
  font-size: 0.92em;
  line-height: 1.8;
  color: var(--txt2);
  margin: 10px 0;
  padding: 12px;
  background: var(--glass);
  border-radius: 10px;
}
.passage-text {
  font-size: 1em;
  line-height: 1.9;
  margin: 12px 0;
}
.q-statement {
  background: var(--glass);
  padding: 12px 16px;
  border-radius: 10px;
  margin: 12px 0;
  border-left: 3px solid var(--accent);
  font-size: 1.05em;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.6;
}
.q-statement .statement-icon {
  color: var(--accent);
  margin-top: 0.15em;
}
.q-text-fill {
  font-size: 1.05em;
  line-height: 1.8;
  margin: 12px 0;
}
/* Options */
.options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}
.opt {
  padding: 14px 16px;
  border-radius: 12px;
  border: 2px solid #eaeaea;
  background: #fafafa;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1em;
}
.opt:hover {
  background: rgba(211, 47, 47, 0.06);
  border-color: rgba(211, 47, 47, 0.25);
}
.opt.selected {
  background: rgba(211, 47, 47, 0.1);
  border-color: var(--accent);
}
.opt-label {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85em;
  flex-shrink: 0;
}
/* TF */
.tf-opts {
  display: flex;
  gap: 12px;
  margin: 12px 0;
}
.tf-btn {
  flex: 1;
  padding: 16px;
  border-radius: 14px;
  border: 2px solid #eaeaea;
  background: #fafafa;
  cursor: pointer;
  text-align: center;
  font-size: 1.2em;
  font-weight: 700;
  transition: all 0.3s;
}
.tf-btn:hover {
  background: rgba(211, 47, 47, 0.06);
}
.tf-btn.selected {
  border-color: var(--accent);
  background: rgba(211, 47, 47, 0.1);
}
/* Word bank */
.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}
.wb-item {
  padding: 6px 14px;
  border-radius: 8px;
  background: rgba(211, 47, 47, 0.08);
  color: var(--accent);
  font-size: 0.9em;
  font-weight: 600;
}
.wb-item.blue {
  background: rgba(211, 47, 47, 0.12);
  color: var(--accent);
}
.word-highlight {
  display: inline-block;
  font-size: 1.6em;
  font-weight: 900;
  background: rgba(211, 47, 47, 0.1);
  color: var(--accent);
  padding: 8px 24px;
  border-radius: 12px;
  margin: 10px 0;
}
/* Order */
.order-sents {
  margin: 12px 0;
}
.order-sent {
  padding: 10px 14px;
  background: var(--glass);
  border-radius: 8px;
  margin: 6px 0;
  line-height: 1.7;
}
.order-input {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin: 10px 0;
}
.order-select {
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--card2);
  border: 1px solid #e5e7eb;
  color: var(--txt);
  font-family: inherit;
  font-size: 1em;
  min-width: 70px;
}
/* Write */
.write-input {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  background: #fff;
  color: var(--txt);
  font-size: 1.05em;
  font-family: inherit;
  resize: vertical;
  min-height: 50px;
  transition: border-color 0.3s;
}
.write-input:focus {
  outline: none;
  border-color: var(--accent);
}
/* Nav buttons */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 16px 0;
}
.nav-btn-prev,
.nav-btn-next,
.nav-btn-finish {
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  font-size: 1em;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.nav-btn-prev {
  background: #ffffff;
  color: var(--txt);
  border: 2px solid #e5e7eb;
}
.nav-btn-prev:hover {
  border-color: #d1d5db;
  background: #f9f9f9;
}
.nav-btn-prev:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.nav-btn-next {
  background: #ffffff;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.nav-btn-next:hover {
  transform: translateY(-2px);
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.2);
}
.nav-btn-finish {
  background: #ffffff;
  color: var(--green);
  border: 2px solid var(--green);
}
.nav-btn-finish:hover {
  transform: translateY(-2px);
  background: var(--green);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(46, 125, 50, 0.2);
}
/* Question dots */
.q-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin: 16px 0;
  padding: 12px;
  background: var(--card);
  border-radius: 12px;
}
.q-dot {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 0.75em;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid #d1d5db;
  background: #f3f4f6;
  color: #374151;
}
.q-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: scale(1.15);
}
.q-dot.answered {
  background: rgba(211, 47, 47, 0.12);
  color: var(--accent);
}
.q-dot.skipped {
  background: rgba(239, 68, 68, 0.1);
  color: var(--red);
}
.q-dot.locked {
  opacity: 0.3;
  cursor: not-allowed;
}
.q-dot.answered.active {
  background: var(--accent);
  color: #fff;
}
/* Results */
.results-panel {
  background: var(--card);
  border-radius: 20px;
  padding: clamp(20px, 5vw, 40px);
  margin: 20px 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  animation: fadeIn 0.5s;
  color: var(--txt);
}
.results-panel .summary-callout {
  margin: 14px auto 16px;
  max-width: 720px;
  padding: 16px 20px;
  border-radius: 12px;
  border: 2px solid transparent;
  text-align: left;
  line-height: 1.65;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}
.results-panel .summary-callout.pass {
  background: #ecfdf5;
  border-color: #34d399;
  color: #064e3b;
}
.results-panel .summary-callout.fail {
  background: #fff1f2;
  border-color: #fb7185;
  color: #7f1d1d;
}
.results-panel .summary-note {
  color: #4b2f2f;
  font-size: 0.92em;
}
.results-panel .section-meta {
  font-size: 0.82em;
  color: #5a3f3f;
  margin-top: 4px;
  line-height: 1.5;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.score-ring {
  width: 160px;
  height: 160px;
  margin: 0 auto 16px;
  position: relative;
  display: grid;
  place-items: center;
}
.score-ring svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.score-val {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2em;
  font-weight: 900;
  line-height: 1;
  z-index: 2;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}
.stat-card {
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}
.stat-num {
  font-size: 1.6em;
  font-weight: 900;
}
.stat-label {
  font-size: 0.85em;
  color: var(--txt2);
  margin: 4px 0;
}
.stat-sub {
  font-size: 0.72em;
  color: var(--txt2);
  margin-top: 3px;
}
.feedback-card {
  padding: 20px 24px;
  border-radius: 12px;
  margin: 16px 0;
}
.feedback-card h4 .icon-text {
  justify-content: center;
}
.feedback-card.strength {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.4);
}
.feedback-card.improve {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.4);
}
.feedback-card li {
  margin: 5px 0;
  font-size: 0.88em;
  line-height: 1.6;
  color: var(--txt);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.feedback-card ul {
  list-style: none;
  padding-left: 0;
  margin: 10px 0 0;
}
.feedback-card li .feedback-icon {
  margin-top: 0.15em;
}
/* Review */
.review-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 16px 0;
  flex-wrap: wrap;
}
.rev-tab {
  padding: 10px 20px;
  border: 2px solid var(--card-border);
  border-radius: 10px;
  background: var(--card);
  color: var(--txt);
  font-family: inherit;
  font-size: 0.9em;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.rev-tab.active {
  background: rgba(211, 47, 47, 0.08);
  border-color: var(--accent);
  color: var(--accent);
}
.review-card {
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
  margin: 12px 0 16px;
  border: 2px solid #e5e7eb;
  border-left: 6px solid var(--glass);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}
.review-card.correct {
  border-left-color: var(--green);
}
.review-card.wrong {
  border-left-color: var(--red);
}
.rev-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.rev-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.rev-icon .ui-icon {
  font-size: 1.2em;
}
.rev-time {
  color: #5f4444;
  font-size: 0.8em;
  margin-left: auto;
}
.rev-text {
  font-size: 0.88em;
  color: var(--txt);
  line-height: 1.7;
  margin: 6px 0;
}
.rev-ans {
  font-size: 0.88em;
  margin: 8px 0;
  padding: 10px;
  background: var(--glass);
  border-radius: 8px;
  line-height: 1.6;
}
.rev-exp {
  font-size: 0.85em;
  color: var(--accent);
  margin-top: 8px;
  padding: 8px 12px;
  background: rgba(0, 200, 151, 0.06);
  border-radius: 8px;
}
/* Submit Confirmation Modal */
.submit-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(6px);
  animation: fadeIn 0.3s;
}
.submit-modal {
  background: white;
  border-radius: 20px;
  padding: 32px;
  max-width: 520px;
  width: 92%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.4s ease-out;
}
.submit-modal h3 {
  color: var(--red);
  font-size: 1.4em;
  margin-bottom: 16px;
}
.submit-modal h3 .icon-text {
  justify-content: center;
}
.submit-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 16px 0;
}
.submit-stat {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 14px 8px;
  text-align: center;
}
.submit-stat .num {
  font-size: 1.5em;
  font-weight: 900;
  color: var(--accent);
}
.submit-stat .lbl {
  font-size: 0.78em;
  color: var(--txt2);
  margin-top: 4px;
  display: flex;
  justify-content: center;
}
.submit-warning {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 10px;
  padding: 12px;
  margin: 14px 0;
  font-size: 0.88em;
  color: #92400e;
}
.submit-warning .icon-text {
  align-items: flex-start;
}
.btn-submit-final {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 14px;
  font-size: 1.1em;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-submit-final.confirm {
  background: linear-gradient(135deg, var(--green), #1b5e20);
  color: white;
  box-shadow: 0 4px 15px rgba(46, 125, 50, 0.4);
}
.btn-submit-final.confirm:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 125, 50, 0.5);
}
.btn-submit-final.cancel {
  background: #f3f4f6;
  color: var(--txt2);
}
.btn-submit-final.cancel:hover {
  background: #e5e7eb;
}

/* Grade Badge */
.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 24px;
  border-radius: 50px;
  font-size: 1.1em;
  font-weight: 900;
  letter-spacing: 1px;
  margin: 8px 0;
  animation: fadeIn 0.8s;
}
.grade-badge.pass {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}
.grade-badge.fail {
  background: linear-gradient(135deg, #fff1f2, #ffe4e6);
  color: #9f1239;
  border: 2px solid #fb7185;
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.2);
}
.grade-label {
  font-size: 0.9em;
  color: var(--txt);
  margin-top: 4px;
}

/* Score Breakdown Official */
.score-official {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0;
}
.score-off-card {
  background: var(--card);
  border-radius: 14px;
  padding: 18px 12px;
  text-align: center;
  border: 2px solid #e5e7eb;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}
.score-off-card .pts {
  font-size: 1.8em;
  font-weight: 900;
}
.score-off-card .max {
  font-size: 0.85em;
  color: #5a3f3f;
}
.score-off-card .sec-label {
  font-size: 0.85em;
  font-weight: 600;
  margin-top: 6px;
  display: flex;
  justify-content: center;
}
.score-off-card .sec-label .icon-text {
  justify-content: center;
}
.score-off-card .bar-wrap {
  height: 6px;
  background: #f0f0f0;
  border-radius: 3px;
  margin-top: 8px;
  overflow: hidden;
}
.score-off-card .bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 1s ease;
}

/* Enhanced Review Explanations */
.rev-exp-box {
  margin-top: 10px;
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 0.88em;
  line-height: 1.7;
}
.rev-exp-box.correct {
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.08),
    rgba(16, 185, 129, 0.03)
  );
  border: 1px solid rgba(16, 185, 129, 0.25);
}
.rev-exp-box.wrong {
  background: linear-gradient(
    135deg,
    rgba(239, 68, 68, 0.08),
    rgba(239, 68, 68, 0.03)
  );
  border: 1px solid rgba(239, 68, 68, 0.25);
}
.rev-exp-box.skipped {
  background: linear-gradient(
    135deg,
    rgba(245, 158, 11, 0.08),
    rgba(245, 158, 11, 0.03)
  );
  border: 1px solid rgba(245, 158, 11, 0.25);
}
.rev-exp-box h5 {
  margin-bottom: 6px;
  font-size: 0.95em;
}
.rev-exp-box h5 .icon-text {
  align-items: flex-start;
}
.rev-exp-box .why-wrong {
  color: #dc2626;
  margin-bottom: 8px;
}
.rev-exp-box .why-correct {
  color: #059669;
}
.rev-exp-box .exp-detail {
  color: var(--txt2);
  margin-top: 6px;
  font-size: 0.85em;
}
.rev-exp-box .why-wrong,
.rev-exp-box .why-correct,
.rev-exp-box .exp-detail {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.rev-difficulty {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72em;
  font-weight: 600;
  margin-left: 8px;
}
.diff-easy {
  background: #dcfce7;
  color: #166534;
}
.diff-medium {
  background: #fef3c7;
  color: #92400e;
}
.diff-hard {
  background: #fecaca;
  color: #991b1b;
}

/* Skill Analysis Section */
.skill-analysis {
  margin: 24px 0;
}
.skill-analysis h4 {
  text-align: center;
  margin-bottom: 16px;
  font-size: 1.1em;
}
.skill-analysis h4 .icon-text {
  justify-content: center;
}
.review-search-wrap {
  position: relative;
}
.review-search-wrap .search-field-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #9ca3af;
  font-size: 1.05em;
  pointer-events: none;
}
.review-search-wrap input {
  padding-left: 44px !important;
}
.skill-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}
.skill-table th {
  background: var(--red);
  color: white;
  padding: 10px 14px;
  font-size: 0.85em;
  font-weight: 600;
  text-align: left;
}
.skill-table td {
  padding: 10px 14px;
  font-size: 0.85em;
  border-bottom: 1px solid #e5e7eb;
}
.skill-table tr:nth-child(even) td {
  background: #fafafa;
}
.skill-table tr:last-child td {
  border-bottom: none;
}
.skill-bar-wrap {
  height: 8px;
  background: #f0f0f0;
  border-radius: 4px;
  overflow: hidden;
  min-width: 80px;
}
.skill-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease;
}
.pct-high {
  color: #059669;
  font-weight: 700;
}
.pct-mid {
  color: #d97706;
  font-weight: 700;
}
.pct-low {
  color: #dc2626;
  font-weight: 700;
}

/* ===== GLOBAL RESPONSIVE FIXES ===== */
.sec-nav {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.sec-nav::-webkit-scrollbar {
  display: none;
}
.sec-nav-btn {
  flex-shrink: 0;
}
.section-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 10px;
}
button,
.opt,
.tf-btn,
.q-dot,
a {
  touch-action: manipulation;
}
/* Safe area (iPhone notch) */
@supports (padding: env(safe-area-inset-bottom)) {
  .sec-nav {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }
  .container,
  .landing-container {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }
  .site-footer {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-bottom: max(24px, env(safe-area-inset-bottom));
  }
  .nav-buttons {
    padding-bottom: env(safe-area-inset-bottom);
  }
}
@media (max-width: 834px) {
  .creator-showcase {
    width: 100%;
    padding: 20px 16px;
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .creator-copy,
  .footer-credit {
    text-align: center;
  }
  .creator-copy {
    max-width: none;
  }
  .creator-desc {
    max-width: none;
  }
  .creator-meta,
  .footer-brand {
    justify-content: center;
  }
  .creator-model-shell {
    min-height: 280px;
  }
  .site-footer-inner {
    grid-template-columns: 1fr;
  }
}
@media (prefers-reduced-motion: reduce) {
  .creator-model {
    animation: none;
  }
}

/* ===== EXTRA-SMALL PHONES: ≤374px (iPhone SE, small Android) ===== */
@media (max-width: 374px) {
  .landing-container {
    padding: 16px 10px 24px;
  }
  .main-title {
    font-size: clamp(22px, 6vw, 28px);
  }
  .main-subtitle {
    font-size: 13px;
  }
  .landing-card {
    padding: 16px 12px;
    border-radius: 14px;
    margin-bottom: 12px;
  }
  .landing-card-title {
    font-size: 14px;
  }
  .exam-info-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .info-box {
    padding: 10px 8px;
  }
  .info-box .value {
    font-size: 16px;
  }
  .section-table th,
  .section-table td {
    padding: 7px 8px;
    font-size: 12px;
  }
  .pass-info {
    flex-direction: column;
    text-align: center;
    gap: 8px;
    padding: 12px;
  }
  .pass-text .detail {
    font-size: 12px;
  }
  .name-input {
    padding: 10px 12px;
    font-size: 14px;
  }
  .btn-start {
    padding: 14px;
    font-size: 15px;
  }
  .creator-name {
    font-size: clamp(24px, 10vw, 32px);
  }
  .creator-model-shell {
    min-height: 240px;
    padding: 18px 12px 14px;
    border-radius: 18px;
  }
  .creator-model {
    width: min(100%, 220px);
  }
  .site-footer-inner {
    padding: 16px 14px;
    border-radius: 16px;
  }
  .footer-mark {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    font-size: 14px;
  }
  .footer-mark .ui-icon {
    font-size: 24px;
  }
  .footer-title {
    font-size: 14px;
  }
  .footer-credit-line {
    font-size: 13px;
  }
  .sec-nav {
    padding: 8px 8px;
    gap: 6px;
  }
  .sec-nav-btn {
    padding: 6px 8px;
    font-size: 0.7em;
    border-radius: 8px;
    min-width: 70px;
  }
  .sec-nav-btn .sub {
    font-size: 0.55em;
  }
  #questionArea {
    padding-top: 65px;
  }
  .q-card {
    padding: 14px 12px;
    border-radius: 12px;
  }
  .q-num {
    width: 28px;
    height: 28px;
    font-size: 0.75em;
    border-radius: 8px;
  }
  .tts-btn {
    padding: 6px 10px;
    font-size: 0.75em;
  }
  .opt {
    padding: 10px 10px;
    font-size: 0.88em;
    gap: 8px;
  }
  .opt-label {
    width: 24px;
    height: 24px;
    font-size: 0.75em;
  }
  .tf-btn {
    padding: 12px;
    font-size: 1em;
  }
  .q-timer-bar {
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px;
  }
  .timer-val {
    font-size: 1.05em;
  }
  .timer-label {
    font-size: 0.6em;
  }
  .nav-btn-prev,
  .nav-btn-next,
  .nav-btn-finish {
    padding: 10px 12px;
    font-size: 0.8em;
    border-radius: 10px;
  }
  .q-dot {
    width: 24px;
    height: 24px;
    font-size: 0.65em;
    border-radius: 6px;
  }
  .q-dots {
    gap: 4px;
    padding: 8px;
  }
  .q-counter {
    font-size: 1.1em;
  }
  .section-badge {
    font-size: 0.75em;
    padding: 4px 10px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .score-official,
  .submit-summary-grid {
    grid-template-columns: 1fr;
  }
  .score-ring {
    width: 120px;
    height: 120px;
  }
  .score-val {
    font-size: 1.6em;
  }
  .stat-num {
    font-size: 1.3em;
  }
  .resume-modal,
  .submit-modal {
    padding: 20px 16px;
    width: 95%;
  }
  .submit-modal h3 {
    font-size: 1.1em;
  }
  .review-card {
    padding: 12px;
  }
  .rev-tab {
    padding: 7px 12px;
    font-size: 0.78em;
  }
  .review-tabs {
    flex-wrap: wrap;
  }
  .skill-table th,
  .skill-table td {
    padding: 7px 8px;
    font-size: 0.78em;
  }
  .feedback-card {
    padding: 16px;
  }
  .feedback-card li {
    font-size: 0.85em;
  }
  .word-highlight {
    font-size: 1.3em;
    padding: 6px 16px;
  }
  .container {
    padding: 10px;
  }
}

/* ===== REGULAR PHONES: 375–480px (iPhone 14/15, mainstream Android) ===== */
@media (min-width: 375px) and (max-width: 480px) {
  .landing-container {
    padding: 20px 14px 30px;
  }
  .main-title {
    font-size: clamp(24px, 5.5vw, 32px);
  }
  .landing-card {
    padding: 20px 16px;
    margin-bottom: 14px;
  }
  .creator-model {
    width: min(100%, 236px);
  }
  .exam-info-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .info-box .value {
    font-size: 16px;
  }
  .section-table th,
  .section-table td {
    padding: 8px 10px;
    font-size: 13px;
  }
  .sec-nav {
    padding: 10px 10px;
    gap: 6px;
  }
  .sec-nav-btn {
    padding: 7px 10px;
    font-size: 0.75em;
    border-radius: 10px;
    min-width: 80px;
  }
  .sec-nav-btn .sub {
    font-size: 0.58em;
  }
  #questionArea {
    padding-top: 70px;
  }
  .q-card {
    padding: 18px 14px;
  }
  .q-num {
    width: 30px;
    height: 30px;
    font-size: 0.8em;
  }
  .tts-btn {
    padding: 7px 12px;
    font-size: 0.8em;
  }
  .opt {
    padding: 12px 12px;
    font-size: 0.92em;
  }
  .opt-label {
    width: 26px;
    height: 26px;
    font-size: 0.8em;
  }
  .q-timer-bar {
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px;
  }
  .nav-btn-prev,
  .nav-btn-next,
  .nav-btn-finish {
    padding: 11px 14px;
    font-size: 0.85em;
  }
  .q-dot {
    width: 26px;
    height: 26px;
    font-size: 0.7em;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .score-official,
  .submit-summary-grid {
    grid-template-columns: 1fr;
  }
  .score-ring {
    width: 130px;
    height: 130px;
  }
  .score-val {
    font-size: 1.8em;
  }
  .resume-modal,
  .submit-modal {
    padding: 24px 18px;
    width: 94%;
  }
  .review-tabs {
    flex-wrap: wrap;
  }
  .rev-tab {
    padding: 8px 14px;
    font-size: 0.82em;
  }
  .container {
    padding: 12px;
  }
}

/* ===== LARGE PHONES: 481–600px (phablets, landscape phones) ===== */
@media (min-width: 481px) and (max-width: 600px) {
  .landing-container {
    padding: 24px 16px 32px;
  }
  .landing-card {
    padding: 22px 18px;
  }
  .sec-nav-btn {
    padding: 8px 12px;
    font-size: 0.8em;
  }
  .sec-nav-btn .sub {
    font-size: 0.6em;
  }
  #questionArea {
    padding-top: 75px;
  }
  .q-card {
    padding: 20px 16px;
  }
  .q-timer-bar {
    flex-wrap: wrap;
    gap: 8px;
  }
  .nav-btn-prev,
  .nav-btn-next,
  .nav-btn-finish {
    padding: 12px 16px;
    font-size: 0.9em;
  }
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .score-official,
  .submit-summary-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .container {
    padding: 14px;
  }
}

/* ===== TABLETS PORTRAIT: 601–834px (iPad Mini, small tablets) ===== */
@media (min-width: 601px) and (max-width: 834px) {
  .container {
    max-width: 720px;
    padding: 16px;
  }
  .landing-container {
    max-width: 720px;
    padding: 28px 20px 36px;
  }
  .landing-card {
    padding: 24px 22px;
  }
  .sec-nav {
    justify-content: center;
  }
  .sec-nav-btn {
    padding: 9px 16px;
    font-size: 0.85em;
  }
  #questionArea {
    padding-top: 78px;
  }
  .q-card {
    padding: 22px 20px;
  }
  .score-ring {
    width: 150px;
    height: 150px;
  }
  .resume-modal,
  .submit-modal {
    max-width: 440px;
  }
}

/* ===== TABLETS LANDSCAPE / SMALL LAPTOPS: 835–1024px (iPad Air/Pro) ===== */
@media (min-width: 835px) and (max-width: 1024px) {
  .container {
    max-width: 860px;
    padding: 18px;
  }
  .landing-container {
    max-width: 860px;
    padding: 32px 24px 40px;
  }
  .landing-card {
    padding: 28px 24px;
  }
  .sec-nav {
    justify-content: center;
    gap: 10px;
  }
  .sec-nav-btn {
    padding: 10px 18px;
    font-size: 0.88em;
  }
  #questionArea {
    padding-top: 80px;
  }
  .q-card {
    padding: 24px;
  }
  .opt {
    padding: 14px 18px;
  }
  .score-ring {
    width: 160px;
    height: 160px;
  }
  .resume-modal,
  .submit-modal {
    max-width: 480px;
  }
}

/* ===== DESKTOPS: 1025–1440px ===== */
@media (min-width: 1025px) and (max-width: 1440px) {
  .container {
    max-width: 900px;
    padding: 20px;
  }
  .landing-container {
    max-width: 900px;
    padding: 36px 28px 44px;
  }
  .landing-card {
    padding: 30px 28px;
    border-radius: 22px;
  }
  .sec-nav {
    justify-content: center;
    gap: 12px;
  }
  .sec-nav-btn {
    padding: 11px 22px;
    font-size: 0.92em;
  }
  .q-card {
    padding: 26px;
  }
  .opt:hover {
    transform: translateX(4px);
  }
  .submit-modal {
    max-width: 540px;
  }
}

/* ===== LARGE SCREENS: ≥1441px ===== */
@media (min-width: 1441px) {
  .container {
    max-width: 1000px;
    padding: 24px;
  }
  .landing-container {
    max-width: 1000px;
    padding: 40px 32px 48px;
  }
  .main-title {
    font-size: 46px;
  }
  .main-subtitle {
    font-size: 18px;
  }
  .landing-card {
    padding: 34px 32px;
    border-radius: 24px;
  }
  .info-box .value {
    font-size: 22px;
  }
  .sec-nav {
    justify-content: center;
    gap: 14px;
  }
  .sec-nav-btn {
    padding: 12px 26px;
    font-size: 0.95em;
  }
  .q-card {
    padding: 30px;
  }
  .q-num {
    width: 40px;
    height: 40px;
    font-size: 1em;
  }
  .opt {
    padding: 16px 20px;
    font-size: 1.05em;
  }
  .opt:hover {
    transform: translateX(5px);
  }
  .score-ring {
    width: 180px;
    height: 180px;
  }
  .score-val {
    font-size: 2.5em;
  }
  .stat-num {
    font-size: 1.8em;
  }
  .submit-modal {
    max-width: 580px;
  }
}

/* ===== LANDSCAPE PHONE ORIENTATION ===== */
@media (max-height: 500px) and (orientation: landscape) {
  .sec-nav {
    padding: 6px 10px;
  }
  .sec-nav-btn {
    padding: 5px 10px;
    font-size: 0.72em;
  }
  .sec-nav-btn .sub {
    display: none;
  }
  #questionArea {
    padding-top: 50px;
  }
  .q-card {
    padding: 14px;
  }
  .landing-container {
    padding: 12px 16px 20px;
  }
  .landing-card {
    padding: 14px 12px;
    margin-bottom: 10px;
  }
  .creator-showcase {
    gap: 14px;
  }
  .main-title {
    font-size: 24px;
    margin-bottom: 4px;
  }
  .btn-start {
    padding: 12px;
    font-size: 15px;
    margin-top: 10px;
  }
  .resume-modal,
  .submit-modal {
    max-height: 90vh;
    overflow-y: auto;
  }
}

/* ===== PRINT (bonus) ===== */
@media print {
  .sec-nav,
  .nav-buttons,
  .tts-btn,
  .btn-start,
  .preload-status {
    display: none !important;
  }
  body {
    background: white !important;
    color: black !important;
  }
  .container {
    max-width: 100% !important;
  }
}