:root {
  --bg: #fff8fc;
  --bg-2: #fff1f8;
  --card: #ffffff;
  --card-solid: #fffdfd;
  --line: #ffd9e8;
  --line-strong: #ffc0d8;
  --text: #5a3f52;
  --muted: #8a6f7e;
  --amber: #ffb26b;
  --amber-2: #ff8fb1;
  --green: #5ecfb1;
  --red: #ff7d95;
  --blue: #7ec8ff;
  --violet: #b79cff;
  --pink: #ff8fb1;
  --pink-deep: #e85c8a;
  --cream: #fff4e6;
  --mint: #e4fbf3;
  --sky: #e7f4ff;
  --lilac: #f1ebff;
  --radius: 26px;
  --shadow: 0 12px 30px rgba(255, 143, 177, 0.16);
  --font: "YouYuan", "Yuanti SC", "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", sans-serif;
}

body {
  color: var(--text);
  font-family: var(--font);
  background:
    radial-gradient(620px 420px at 8% -4%, #ffe2f0, transparent 66%),
    radial-gradient(520px 380px at 96% 6%, #e3f4ff, transparent 62%),
    radial-gradient(680px 520px at 50% 104%, #fff0d8, transparent 68%),
    linear-gradient(180deg, #fff9fd 0%, #fff3f9 46%, #fff9fd 100%);
  background-attachment: fixed;
}

body::before {
  background-image:
    radial-gradient(#ffcfe2 1.6px, transparent 1.7px),
    radial-gradient(#cfe9ff 1.6px, transparent 1.7px);
  background-size: 28px 28px, 28px 28px;
  background-position: 0 0, 14px 14px;
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
}

a {
  color: var(--pink-deep);
}

:focus-visible {
  outline: 3px solid #ffb3c9;
  outline-offset: 3px;
}

.appbar,
.quiz-top {
  background: linear-gradient(
    180deg,
    rgba(255, 249, 253, 0.98) 0%,
    rgba(255, 249, 253, 0.86) 70%,
    rgba(255, 249, 253, 0) 100%
  );
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.actionbar {
  background: linear-gradient(
    0deg,
    rgba(255, 249, 253, 0.99) 28%,
    rgba(255, 249, 253, 0.88) 72%,
    rgba(255, 249, 253, 0) 100%
  );
}

.brand {
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.3px;
}

.brand small {
  color: var(--muted);
}

.brand-mark {
  background: linear-gradient(145deg, #ffd7e7, #ffb3cb);
  border: 2px solid #fff;
  box-shadow: 0 6px 14px rgba(255, 143, 177, 0.32);
  transform: rotate(-4deg);
}

.icon-btn {
  background: #fff;
  border: 2px solid #ffe0ec;
  color: var(--pink-deep);
  box-shadow: 0 4px 10px rgba(255, 143, 177, 0.14);
}

.icon-btn:hover {
  background: #fff3f9;
}

.chip {
  border: 1.5px solid #ffe0ec;
  background: #fff;
  color: var(--muted);
  font-weight: 700;
}

.chip.amber {
  color: #c47a2a;
  border-color: #ffdfb8;
  background: #fff6e9;
}

.chip.green {
  color: #2f9c7c;
  border-color: #c8f3e4;
  background: #effcf7;
}

.chip.red {
  color: #d95270;
  border-color: #ffd0dc;
  background: #fff1f5;
}

.card {
  border: 2px solid #ffe4ee;
  background: #fff;
  box-shadow: var(--shadow);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.section-title {
  color: var(--text);
}

.section-title .link {
  color: var(--pink-deep);
}

.btn {
  min-height: 50px;
  border-radius: 999px;
  border: 2px solid #ffe0ec;
  background: #fff;
  color: var(--text);
  box-shadow: 0 5px 0 #ffe4ee;
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.16s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(3px) scale(0.99);
  box-shadow: 0 2px 0 #ffe4ee;
}

.btn-primary {
  background: linear-gradient(145deg, #ffc1d5, #ff8fb1);
  color: #5b2b40;
  border-color: #ffb3cb;
  box-shadow: 0 5px 0 #e85c8a, 0 12px 24px rgba(255, 143, 177, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.04);
}

.btn-primary:active {
  box-shadow: 0 2px 0 #e85c8a, 0 8px 16px rgba(255, 143, 177, 0.22);
}

.btn-ghost {
  background: #fff;
  color: var(--text);
  border-color: #ffe0ec;
}

.btn-ghost:hover {
  background: #fff5fa;
}

.btn-danger {
  background: #fff1f5;
  color: #d95270;
  border-color: #ffc7d6;
  box-shadow: 0 5px 0 #ffd6e1;
}

.btn-sm {
  min-height: 42px;
  border-radius: 999px;
}

.btn[disabled] {
  opacity: 0.5;
}

.hero {
  background:
    radial-gradient(340px 200px at 88% -10%, #ffd9e9, transparent 70%),
    radial-gradient(300px 200px at 0% 100%, #e7f4ff, transparent 70%),
    linear-gradient(150deg, #fff4fa 0%, #fff 52%, #fff8f0 100%);
  border-color: #ffd9e8;
}

.hero::after {
  content: "♡";
  right: 10px;
  bottom: -38px;
  font-size: 140px;
  color: rgba(255, 143, 177, 0.13);
  letter-spacing: 0;
}

.avatar {
  border-radius: 50%;
  background: linear-gradient(145deg, #fff2f8, #ffe0ec);
  border: 2px solid #ffd0e2;
  box-shadow: 0 6px 14px rgba(255, 143, 177, 0.18);
}

.avatar .lv {
  background: #fff;
  border: 2px solid #ffd0e2;
  color: var(--pink-deep);
}

.hero-name h1 {
  color: var(--text);
}

.xpbar {
  height: 10px;
  background: #ffe6f1;
}

.xpbar i {
  background: linear-gradient(90deg, #ffb3cb, #c7a7ff);
}

.streak-box {
  border: 2px dashed #ffd7a8;
  background: #fff8ec;
}

.streak-top strong {
  color: #c9772a;
}

.dot {
  background: #fff;
  border: 2px solid #ffe0ec;
}

.dot.on {
  background: linear-gradient(135deg, #ffb3cb, #ff8fb1);
  box-shadow: 0 0 0 4px rgba(255, 143, 177, 0.16);
}

.streak-note {
  color: #a5754c;
}

.quick {
  gap: 10px;
}

.quick-btn {
  border: 2px solid #ffe4ee;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 5px 0 #fff0f6, 0 10px 20px rgba(255, 143, 177, 0.08);
}

.quick-btn:nth-child(1) {
  background: #fff2f8;
}

.quick-btn:nth-child(2) {
  background: #eef8ff;
}

.quick-btn:nth-child(3) {
  background: #fff8ea;
}

.quick-btn:nth-child(4) {
  background: #effcf7;
}

.quick-btn:hover {
  background: #fff;
  border-color: #ffc0d8;
  transform: translateY(-2px);
}

.quick-btn .qi {
  font-size: 26px;
}

.quick-btn .ql {
  color: var(--text);
}

.daily {
  background: #fff;
}

.daily-bar {
  height: 9px;
  background: #ffe6f1;
}

.daily-bar i {
  background: linear-gradient(90deg, #7fe0c2, #8fd3ff);
}

.daily-num {
  color: var(--text);
}

.foot {
  color: #8a6f7e;
}

.foot b {
  color: #6f5566;
}

.chapter-icon {
  background: #fff2f8;
  border: 2px solid #ffe0ec;
}

.chapter-progress b {
  color: var(--pink-deep);
}

.levels::before {
  background: repeating-linear-gradient(
    180deg,
    #ffd0e2 0 6px,
    transparent 6px 12px
  );
}

.level:hover {
  background: #fff4f9;
}

.level-node {
  background: #fff;
  border: 2px solid #ffe0ec;
  color: var(--muted);
}

.level.done .level-node {
  border-color: #b7efdd;
  color: #2f9c7c;
  background: var(--mint);
}

.level.next .level-node {
  border-color: #ffb3cb;
  color: var(--pink-deep);
  background: #fff1f6;
  box-shadow: 0 0 0 6px rgba(255, 143, 177, 0.14);
}

.level.boss .level-node {
  border-radius: 16px;
  background: linear-gradient(145deg, #fff1d9, #ffe1ef);
  border-color: #ffd0a8;
  color: #c9772a;
}

.level-stars {
  color: #ffe0ea;
}

.level-stars .on {
  color: #ffb26b;
  text-shadow: none;
}

.boss-tag {
  color: #8a4a12;
  background: linear-gradient(135deg, #ffd9a8, #ffb26b);
}

.timer {
  background: #fff;
  border: 2px solid #ffe0ec;
  color: var(--text);
}

.timer.urgent {
  color: #d95270;
  border-color: #ffc7d6;
  background: #fff1f5;
}

.quiz-progress {
  height: 8px;
  background: #ffe6f1;
}

.quiz-progress i {
  background: linear-gradient(90deg, #ffb3cb, #ff8fb1);
}

.qcard {
  background: #fff;
}

.qtext {
  color: var(--text);
}

.qimg-wrap {
  border: 2px solid #ffe0ec;
  background: #fff7fb;
}

.qimg-hint {
  background: rgba(255, 255, 255, 0.9);
  color: var(--pink-deep);
  border: 1px solid #ffe0ec;
}

.opt {
  border: 2px solid #ffe4ee;
  border-radius: 18px;
  background: #fff;
  color: var(--text);
  box-shadow: 0 4px 0 #fff0f6;
}

.opt:hover {
  background: #fff5fa;
  border-color: #ffc0d8;
}

.opt:active {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #fff0f6;
}

.opt .key {
  border-radius: 50%;
  background: #fff1f6;
  color: var(--pink-deep);
  border: 1.5px solid #ffd9e8;
}

.opt.selected {
  border-color: #ff9fbe;
  background: #fff0f6;
}

.opt.selected .key {
  background: #ffb3cb;
  color: #5b2b40;
}

.opt.correct {
  border-color: #9fe6d1;
  background: #effcf7;
}

.opt.correct .key {
  background: #7fe0c2;
  color: #114b3a;
}

.opt.wrong {
  border-color: #ffc0cf;
  background: #fff1f5;
}

.opt.wrong .key {
  background: #ff9fb4;
  color: #4d1524;
}

.feedback {
  border: 2px solid #ffe4ee;
  background: #fff;
}

.feedback.ok {
  border-color: #b7efdd;
  background: #f4fdf9;
}

.feedback.bad {
  border-color: #ffd0dc;
  background: #fff7f9;
}

.feedback.ok .feedback-head {
  color: #2f9c7c;
}

.feedback.bad .feedback-head {
  color: #d95270;
}

.feedback-head .ans {
  color: var(--text);
}

.exp {
  color: #765c6c;
}

.tipbox {
  border: 2px solid #d5ecff;
  background: var(--sky);
  color: #3d6f91;
}

.tipbox b {
  color: #2f7fae;
}

.multihint {
  border: 2px dashed #b7efdd;
  background: var(--mint);
  color: #2f9c7c;
}

.subject-tabs {
  border: 2px solid #ffe4ee;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 6px 16px rgba(255, 143, 177, 0.1);
}

.subject-tab {
  border-radius: 999px;
  color: var(--muted);
}

.subject-tab.on {
  color: #5b2b40;
  background: linear-gradient(135deg, #ffc1d5, #ff8fb1);
  box-shadow: 0 6px 14px rgba(255, 143, 177, 0.28);
}

.result-hero.fail {
  background: radial-gradient(360px 200px at 50% -10%, #ffe0ea, transparent 72%), #fff;
}

.result-hero.pass {
  background: radial-gradient(360px 200px at 50% -10%, #dcfbf0, transparent 72%), #fff;
}

.ring {
  background: conic-gradient(
    var(--ring-color, var(--green)) calc(var(--p, 0) * 1%),
    #ffe6f1 0
  );
}

.ring::before {
  background: #fff;
  border: 2px solid #ffe4ee;
}

.stars-big {
  color: #ffe0ea;
}

.stars-big .on {
  color: #ffb26b;
  text-shadow: none;
}

.stat {
  border: 2px solid #ffe4ee;
  background: #fff;
}

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

.xp-gain {
  border: 1.5px solid #ddd0ff;
  background: var(--lilac);
  color: #6f53a8;
}

.review-item {
  border: 2px solid #ffe4ee;
  background: #fff;
}

.review-item .rq {
  color: var(--text);
}

.review-item .ra {
  color: #2f9c7c;
}

.review-item .ra.miss {
  color: #d95270;
}

.streak-panel {
  border: 2px dashed #ffd7a8;
  background: #fff8ec;
}

.streak-panel h3 {
  color: #c9772a;
}

.streak-panel p {
  color: #a5754c;
}

.cert-cta {
  border: 2px solid #ffdca8;
  background: linear-gradient(140deg, #fff6e2, #fff0f6);
}

.cert-cta h3 {
  color: #c9772a;
}

.cert-cta p {
  color: #a5754c;
}

.field label {
  color: var(--muted);
}

.field input[type="text"],
.field input[type="number"],
.field input[type="password"] {
  width: 100%;
  min-height: 46px;
  padding: 11px 14px;
  border: 2px solid #ffe0ec;
  border-radius: 16px;
  background: #fff;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
}

.field input:focus {
  border-color: #ffb3cb;
  box-shadow: 0 0 0 4px rgba(255, 143, 177, 0.14);
}

.check {
  color: var(--text);
}

.check input {
  accent-color: var(--pink);
}

.signed-box {
  border: 2px dashed #ffd7a8;
  background: #fff8ec;
}

.palette-cell {
  border: 2px solid #ffe4ee;
  background: #fff;
  color: var(--text);
}

.palette-cell.done {
  background: var(--mint);
  border-color: #b7efdd;
  color: #2f9c7c;
}

.palette-cell.cur {
  background: #fff0f6;
  border-color: #ffb3cb;
  color: var(--pink-deep);
}

.palette-legend {
  color: var(--muted);
}

.modal-backdrop {
  background: rgba(255, 240, 247, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal {
  border: 2px solid #ffe0ec;
  background: #fffdfd;
  box-shadow: 0 -18px 50px rgba(255, 143, 177, 0.22);
}

.modal-close {
  background: #fff1f6;
  color: var(--pink-deep);
  border: 1.5px solid #ffd9e8;
}

.toast {
  background: #fff;
  border: 2px solid #ffe0ec;
  color: var(--text);
  box-shadow: 0 12px 30px rgba(255, 143, 177, 0.22);
}

.wrong-item {
  border: 2px solid #ffe4ee;
  background: #fff;
}

.wrong-item .wmeta {
  color: var(--muted);
}

.wrong-item .wa {
  color: #2f9c7c;
}

.wrong-item .wexp {
  color: #765c6c;
}

.tip-card {
  border: 2px solid #ffe4ee;
  background: #fff;
}

.tip-card .mnemonic {
  color: var(--pink-deep);
}

.tip-card .detail {
  color: #765c6c;
}

.login-wrap {
  padding-top: 6vh;
}

.login-brand div {
  color: var(--text);
}

.login-card {
  border: 2px solid #ffe0ec;
  background: #fffdfd;
  box-shadow: 0 18px 40px rgba(255, 143, 177, 0.18);
}

.login-card h2 {
  color: var(--pink-deep);
}

.login-error {
  color: #d95270;
}

.image-viewer {
  background: rgba(70, 42, 58, 0.9);
}

.image-viewer img {
  background: #fff;
  border: 4px solid #fff;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.3);
}

.image-viewer-close {
  border: 2px solid #ffd9e8;
  background: #fff;
  color: var(--pink-deep);
}

@media (max-width: 420px) {
  .quick {
    grid-template-columns: 1fr 1fr;
  }

  .hero::after {
    font-size: 110px;
  }
}