:root {
  --bg: #f6efe3;
  --bg-deep: #0d3b3d;
  --surface: rgba(255, 250, 244, 0.88);
  --surface-strong: #fffaf3;
  --text: #13252b;
  --muted: #5f6f75;
  --line: rgba(19, 37, 43, 0.12);
  --accent: #ec6b3b;
  --accent-soft: rgba(236, 107, 59, 0.12);
  --mint: #2d8c83;
  --mint-soft: rgba(45, 140, 131, 0.12);
  --danger: #b9382f;
  --danger-soft: rgba(185, 56, 47, 0.12);
  --shadow: 0 24px 60px rgba(40, 45, 52, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --font-body: "IBM Plex Sans KR", sans-serif;
  --font-display: "Space Grotesk", "IBM Plex Sans KR", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(236, 107, 59, 0.18), transparent 24%),
    radial-gradient(circle at left 20%, rgba(45, 140, 131, 0.18), transparent 20%),
    linear-gradient(180deg, #fbf5ea 0%, var(--bg) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(19, 37, 43, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(19, 37, 43, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 88%);
}

.page-shell {
  width: min(1200px, calc(100vw - 32px));
  margin: 28px auto 60px;
  position: relative;
}

.layout {
  display: grid;
  gap: 20px;
}

.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  animation: rise 0.5s ease both;
}

.panel::after {
  content: "";
  position: absolute;
  inset: auto 24px -1px auto;
  width: 96px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.hero {
  padding: 34px;
  margin-bottom: 20px;
  background:
    linear-gradient(140deg, rgba(13, 59, 61, 0.96), rgba(17, 69, 72, 0.88)),
    var(--bg-deep);
  color: #fffaf5;
}

.hero::after {
  background: linear-gradient(90deg, rgba(255, 250, 243, 0.95), transparent);
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.77rem;
}

.eyebrow {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.hero-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.9fr);
  gap: 22px;
  align-items: start;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.45rem, 2vw, 1.95rem);
  letter-spacing: -0.04em;
}

h3 {
  font-size: 1rem;
}

.hero-copy {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.hero-copy p {
  margin: 0;
  color: rgba(255, 250, 245, 0.86);
  line-height: 1.75;
  font-size: 1rem;
}

.hero-card {
  border-radius: 22px;
  padding: 22px;
  background: linear-gradient(180deg, rgba(255, 250, 245, 0.16), rgba(255, 250, 245, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-list,
.compact-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.hero-note {
  display: grid;
  gap: 14px;
}

.hero-note p {
  margin: 0;
  color: rgba(255, 250, 245, 0.86);
  line-height: 1.75;
}

.upload-panel,
.panel:not(.hero) {
  padding: 26px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.section-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.hint-chip {
  padding: 9px 12px;
  border-radius: 999px;
  background: var(--mint-soft);
  color: var(--mint);
  font-size: 0.88rem;
  white-space: nowrap;
}

.dropzone {
  display: grid;
  gap: 12px;
  padding: 28px;
  border: 2px dashed rgba(19, 37, 43, 0.16);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top right, rgba(236, 107, 59, 0.12), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.45));
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.dropzone:hover,
.dropzone[data-dragging="true"] {
  transform: translateY(-2px);
  border-color: var(--accent);
  background:
    radial-gradient(circle at top right, rgba(236, 107, 59, 0.18), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.58));
}

.dropzone-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.dropzone-copy,
.dropzone-filename,
.status-banner,
pre,
td,
th {
  line-height: 1.65;
}

.dropzone-copy,
.dropzone-filename,
.status-banner,
.placeholder-card,
.empty-table,
td,
th,
code,
pre {
  color: var(--muted);
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

pre {
  margin: 0;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(19, 37, 43, 0.05);
  overflow: auto;
}

.upload-actions,
.export-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.password-row {
  margin-top: 16px;
  display: grid;
  grid-template-columns: minmax(260px, 420px) minmax(0, 1fr);
  gap: 14px 18px;
  align-items: end;
}

.input-field {
  display: grid;
  gap: 8px;
}

.input-label {
  font-family: var(--font-display);
  font-size: 0.92rem;
  color: var(--text);
}

.input-field input {
  width: 100%;
  min-height: 50px;
  border: 1px solid rgba(19, 37, 43, 0.12);
  border-radius: 16px;
  padding: 0 16px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.input-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(236, 107, 59, 0.14);
  background: rgba(255, 255, 255, 0.94);
}

.input-caption {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: 0.93rem;
}

.sort-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.sort-label {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.sort-select {
  min-width: 142px;
  border: 1px solid rgba(19, 37, 43, 0.12);
  border-radius: 999px;
  padding: 10px 38px 10px 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.72));
  color: var(--text);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.72));
  background-position:
    calc(100% - 18px) calc(50% - 2px),
    calc(100% - 12px) calc(50% - 2px),
    0 0;
  background-size: 6px 6px, 6px 6px, 100% 100%;
  background-repeat: no-repeat;
  outline: none;
}

.sort-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(236, 107, 59, 0.12);
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease, background 0.2s ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

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

.ghost-button,
.secondary-button {
  background: rgba(19, 37, 43, 0.08);
  color: var(--text);
}

.secondary-button {
  border-radius: 16px;
}

.status-banner {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(19, 37, 43, 0.05);
  white-space: pre-wrap;
}

.status-banner[data-state="success"] {
  background: var(--mint-soft);
  color: var(--mint);
}

.status-banner[data-state="error"] {
  background: var(--danger-soft);
  color: var(--danger);
}

.expectation-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.summary-card,
.placeholder-card {
  min-height: 132px;
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.44));
  border: 1px solid rgba(19, 37, 43, 0.08);
}

.summary-card[data-tone="accent"] {
  background: linear-gradient(180deg, rgba(236, 107, 59, 0.18), rgba(255, 255, 255, 0.55));
}

.summary-card[data-tone="warm"] {
  background: linear-gradient(180deg, rgba(255, 204, 138, 0.28), rgba(255, 255, 255, 0.55));
}

.summary-label {
  font-size: 0.88rem;
  color: var(--muted);
}

.summary-value {
  margin-top: 18px;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 2vw, 2.2rem);
  line-height: 1.05;
}

.distribution-list {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.distribution-row {
  display: grid;
  grid-template-columns: 88px 1fr 56px;
  align-items: center;
  gap: 12px;
}

.distribution-bar {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: rgba(19, 37, 43, 0.08);
  overflow: hidden;
}

.distribution-bar span {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--mint), var(--accent));
}

.table-wrap {
  overflow: auto;
  border-radius: 18px;
  border: 1px solid var(--line);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 960px;
  background: var(--surface-strong);
}

.result-table thead {
  position: sticky;
  top: 0;
  background: rgba(255, 250, 243, 0.94);
  backdrop-filter: blur(8px);
}

.result-table th,
.result-table td {
  padding: 14px 16px;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.result-table tbody tr.is-error {
  background: rgba(185, 56, 47, 0.04);
}

.score-cell {
  font-weight: 700;
  color: var(--text);
}

.student-name {
  font-weight: 700;
  color: var(--text);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(19, 37, 43, 0.08);
  color: var(--text);
  font-size: 0.83rem;
}

.tag.is-pass {
  background: var(--mint-soft);
  color: var(--mint);
}

.trace-block + .trace-block {
  margin-top: 10px;
}

.note-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.note-list li + li {
  margin-top: 6px;
}

.empty-table,
.placeholder-card {
  display: grid;
  place-items: center;
  text-align: center;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .hero-grid,
  .expectation-grid,
  .password-row {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 18px, 100%);
    margin: 10px auto 40px;
  }

  .hero,
  .upload-panel,
  .panel:not(.hero) {
    padding: 20px;
  }

  .section-head {
    flex-direction: column;
  }

  .section-tools,
  .sort-controls {
    width: 100%;
    justify-content: flex-start;
  }

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

  .distribution-row {
    grid-template-columns: 70px 1fr 46px;
  }

  .upload-actions,
  .export-grid {
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}