:root {
  --bg-deep: #081522;
  --bg-mid: #0f2a3a;
  --panel: rgba(10, 34, 49, 0.72);
  --panel-border: rgba(129, 238, 218, 0.18);
  --ink: #eafbf9;
  --muted: #98c8c6;
  --accent: #6df7d4;
  --danger: #ff8f7f;
  --success: #87f8b7;
}

html {
  font-size: 16px;
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: "Bahnschrift", "Segoe UI Variable", "Microsoft YaHei UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(38, 173, 145, 0.26), transparent 30%),
    radial-gradient(circle at 85% 10%, rgba(84, 135, 255, 0.2), transparent 22%),
    linear-gradient(135deg, #06111a 0%, #0b2030 45%, #07131e 100%);
}

a {
  color: inherit;
}

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.page-shell::before,
.page-shell::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.page-shell::before {
  top: 4rem;
  right: -4rem;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  border: 1px solid rgba(109, 247, 212, 0.2);
  box-shadow: 0 0 0 2rem rgba(109, 247, 212, 0.03), 0 0 0 4rem rgba(109, 247, 212, 0.02);
}

.page-shell::after {
  left: -8rem;
  bottom: -8rem;
  width: 22rem;
  height: 22rem;
  background: radial-gradient(circle, rgba(109, 247, 212, 0.12), transparent 65%);
}

.app-header,
.app-main,
.app-footer {
  width: min(1160px, calc(100% - 2rem));
  margin: 0 auto;
}

.app-header {
  padding: 1.5rem 0 0.5rem;
}

.brand-block {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
}

.brand-mark {
  display: block;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 1rem;
  object-fit: contain;
}

.brand-title {
  display: inline-block;
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
}

.brand-subtitle {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.app-main {
  flex: 1;
  padding: 1.25rem 0 2.5rem;
}

.app-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 0 1.5rem;
  color: rgba(234, 251, 249, 0.68);
  font-size: 0.88rem;
}

.hero-panel {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem 2rem 2.25rem;
  border: 1px solid var(--panel-border);
  border-radius: 2rem;
  background:
    linear-gradient(180deg, rgba(12, 40, 57, 0.82), rgba(7, 22, 34, 0.92)),
    linear-gradient(90deg, rgba(109, 247, 212, 0.05), transparent);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.24);
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 1rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(109, 247, 212, 0.1);
  color: var(--accent);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.90rem);
  line-height: 1.04;
}

.hero-title-main {
  display: block;
  font-size: clamp(1.02rem, 1.85vw, 1.72rem);
  white-space: nowrap;
}

.hero-title-sub {
  display: block;
  margin-top: 0.38rem;
  color: var(--muted);
  font-size: clamp(0.88rem, 1.3vw, 1.3rem);
  font-weight: 500;
  line-height: 1.3;
}

.hero-copy p {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.75;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

.metric-card,
.glass-card {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(14px);
}

.metric-card {
  min-width: 9.5rem;
  padding: 1rem 1.1rem;
  border-radius: 1.2rem;
}

.metric-card strong {
  display: block;
  font-size: 1.8rem;
  color: var(--accent);
}

.metric-card span {
  color: var(--muted);
}

.hero-orbit {
  position: relative;
  min-height: 22rem;
}

.orbit-core,
.orbit-ring {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
}

.orbit-core {
  width: 5rem;
  height: 5rem;
  background: radial-gradient(circle, #dffff7 0%, #69efd2 45%, #0d554b 100%);
  box-shadow: 0 0 30px rgba(109, 247, 212, 0.45);
}

.orbit-ring {
  border: 1px solid rgba(109, 247, 212, 0.36);
}

.ring-a {
  width: 10rem;
  height: 10rem;
}

.ring-b {
  width: 15rem;
  height: 15rem;
}

.ring-c {
  width: 20rem;
  height: 20rem;
}

.workspace-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.workspace-grid-single {
  grid-template-columns: 1fr;
}

.glass-card {
  border-radius: 1.6rem;
  padding: 1.6rem;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.18);
}

.card-heading h2,
.rule-card h2 {
  margin: 0;
  font-size: 1.4rem;
}

.card-heading p {
  margin: 0.55rem 0 0;
  color: var(--muted);
}

.detect-form {
  display: grid;
  gap: 1rem;
}

#excelFile {
  display: none;
}

.primary-actions {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(220px, 0.8fr);
  gap: 1rem;
  align-items: stretch;
}

.primary-file-button,
.secondary-action-button {
  display: grid;
  align-content: center;
  gap: 0.25rem;
  min-height: 5.25rem;
  padding: 1.15rem 1.2rem;
  border-radius: 1.3rem;
  text-decoration: none;
  cursor: pointer;
}

.primary-file-button {
  border: 1px solid rgba(121, 243, 218, 0.38);
  background: linear-gradient(135deg, #7af1db, #d9fff6);
  box-shadow: 0 22px 35px rgba(26, 178, 153, 0.28);
}

.primary-file-title {
  color: #05231d;
  font-size: 1.15rem;
  font-weight: 800;
}

.primary-file-caption {
  color: rgba(5, 35, 29, 0.72);
  font-size: 0.92rem;
}

.secondary-action-button {
  border: 1px solid rgba(129, 238, 218, 0.24);
  background: linear-gradient(180deg, rgba(20, 53, 72, 0.92), rgba(11, 30, 43, 0.96));
  color: var(--ink);
  font-weight: 700;
  text-align: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.selected-file-panel {
  display: grid;
  gap: 0.2rem;
  padding: 0.95rem 1rem;
  border: 1px dashed rgba(129, 238, 218, 0.22);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.03);
}

.selected-file-label,
.file-name,
.cooldown-text {
  color: var(--muted);
}

.selected-file-label {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.file-name {
  font-size: 0.92rem;
  word-break: break-all;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.detect-button {
  padding: 0.95rem 1.35rem;
  border: 0;
  border-radius: 999px;
  color: #06231e;
  font-weight: 700;
  background: linear-gradient(135deg, #78f3da, #c9fff0);
  box-shadow: 0 18px 28px rgba(36, 178, 154, 0.26);
}

.detect-button-primary {
  min-width: 19rem;
  min-height: 4rem;
  font-size: 1rem;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #8affea, #f0fff9);
  box-shadow: 0 22px 36px rgba(36, 178, 154, 0.34);
}

.detect-button:disabled {
  opacity: 0.72;
}

.result-banner {
  margin-top: 1rem;
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  font-weight: 600;
}

.result-banner.is-success {
  background: rgba(135, 248, 183, 0.13);
  color: var(--success);
}

.result-banner.is-error {
  background: rgba(255, 143, 127, 0.12);
  color: var(--danger);
}

.summary-panel {
  margin-top: 1.15rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.8rem;
}

.summary-card {
  display: grid;
  gap: 0.3rem;
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(129, 238, 218, 0.12);
  background: rgba(255, 255, 255, 0.03);
}

.summary-card span {
  color: var(--muted);
  font-size: 0.9rem;
}

.summary-card strong {
  font-size: 1.65rem;
  line-height: 1;
}

.summary-required strong { color: #76f3db; }
.summary-preferred strong { color: #9be8d2; }
.summary-alternate strong { color: #ff8f8f; }
.summary-optional strong { color: #ffe399; }
.summary-eliminated strong { color: #ffb6ad; }

.preview-panel {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(129, 238, 218, 0.12);
}

.preview-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 0.9rem;
}

.preview-header h3 {
  margin: 0;
  font-size: 1.08rem;
}

.preview-header span {
  color: var(--muted);
  font-size: 0.92rem;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.85rem;
}

.preview-card {
  display: grid;
  gap: 0.35rem;
  padding: 0.95rem;
  border: 1px solid rgba(129, 238, 218, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.03);
}

.preview-card-required {
  border-color: rgba(96, 165, 250, 0.45);
  background: rgba(219, 234, 254, 0.92);
}

.preview-card-preferred {
  border-color: rgba(74, 222, 128, 0.4);
  background: rgba(220, 252, 231, 0.9);
}

.preview-card-alternate {
  border-color: rgba(248, 113, 113, 0.44);
  background: rgba(254, 226, 226, 0.92);
}

.preview-card-optional {
  border-color: rgba(250, 204, 21, 0.42);
  background: rgba(254, 243, 199, 0.92);
}

.preview-card strong {
  font-size: 0.98rem;
}

.preview-card span {
  color: var(--muted);
  font-size: 0.9rem;
}

.preview-card-required strong,
.preview-card-required span,
.preview-card-preferred strong,
.preview-card-preferred span,
.preview-card-alternate strong,
.preview-card-alternate span,
.preview-card-optional strong,
.preview-card-optional span {
  color: #133043;
}

.preview-tag {
  display: inline-flex;
  justify-self: start;
  margin-top: 0.2rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(109, 247, 212, 0.12);
  color: var(--accent) !important;
  font-weight: 700;
}

.preview-card-required .preview-tag,
.preview-card-preferred .preview-tag,
.preview-card-alternate .preview-tag,
.preview-card-optional .preview-tag {
  background: rgba(19, 48, 67, 0.08);
  color: #133043 !important;
}

@media (max-width: 991.98px) {
  .hero-panel,
  .workspace-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-orbit {
    min-height: 14rem;
  }
}

@media (max-width: 767.98px) {
  .app-header {
    padding-top: 1rem;
  }

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

  .hero-panel {
    gap: 1.4rem;
    padding: 1.5rem;
  }

  .hero-copy p {
    font-size: 0.96rem;
    line-height: 1.65;
  }

  .hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .metric-card {
    min-width: 0;
    padding: 0.9rem;
  }

  .metric-card strong {
    font-size: 1.45rem;
  }

  .primary-file-button,
  .secondary-action-button,
  .detect-button {
    min-height: 3.75rem;
  }

  .action-row {
    flex-direction: column;
    align-items: stretch;
  }

  .detect-button {
    width: 100%;
  }

  .cooldown-text {
    text-align: center;
  }

  .preview-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .preview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 575.98px) {
  .app-header,
  .app-main,
  .app-footer {
    width: min(100% - 1rem, 1160px);
  }

  .hero-panel,
  .glass-card {
    padding: 1.25rem;
    border-radius: 1.25rem;
  }

  .brand-block {
    gap: 0.75rem;
  }

  .brand-mark {
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 0.85rem;
  }

  .brand-title {
    font-size: 1rem;
  }

  .brand-subtitle {
    font-size: 0.82rem;
  }

  .hero-panel {
    padding: 1.15rem;
  }

  .eyebrow {
    margin-bottom: 0.55rem;
    font-size: 0.68rem;
  }

  .hero-copy h1 {
    font-size: 1.45rem;
    line-height: 1.1;
  }

  .hero-title-main {
    font-size: 0.84rem;
  }

  .hero-title-sub {
    margin-top: 0.24rem;
    font-size: 0.76rem;
    line-height: 1.35;
  }

  .hero-copy p {
    margin-top: 0.55rem;
    font-size: 0.84rem;
    line-height: 1.45;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    margin-top: 0.9rem;
    gap: 0.55rem;
  }

  .metric-card {
    padding: 0.75rem 0.85rem;
  }

  .metric-card strong {
    font-size: 1.2rem;
  }

  .metric-card span {
    font-size: 0.82rem;
  }

  .hero-orbit {
    min-height: 6.5rem;
  }

  .orbit-core {
    width: 2.8rem;
    height: 2.8rem;
  }

  .ring-a {
    width: 5.75rem;
    height: 5.75rem;
  }

  .ring-b {
    width: 8rem;
    height: 8rem;
  }

  .ring-c {
    display: none;
  }

  .card-heading h2 {
    font-size: 1.2rem;
  }

  .card-heading p {
    font-size: 0.9rem;
  }

  .primary-file-button,
  .secondary-action-button {
    min-height: 0;
    padding: 1rem;
  }

  .detect-button-primary {
    min-width: 0;
    min-height: 3.65rem;
    font-size: 0.95rem;
  }

  .primary-file-title {
    font-size: 1.02rem;
  }

  .primary-file-caption {
    font-size: 0.86rem;
  }

  .selected-file-panel,
  .summary-card,
  .preview-card {
    padding: 0.85rem;
  }

  .app-footer {
    flex-direction: column;
  }

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