* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f0f0f3;
  --card: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #a1a1a6;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-light: rgba(0, 113, 227, 0.08);
  --accent-gradient: linear-gradient(135deg, #0071e3 0%, #0077ed 100%);
  --success: #30d158;
  --success-light: rgba(48, 209, 88, 0.1);
  --success-gradient: linear-gradient(135deg, #30d158 0%, #28c840 100%);
  --error: #ff453a;
  --error-light: rgba(255, 69, 58, 0.1);
  --error-gradient: linear-gradient(135deg, #ff453a 0%, #ff3326 100%);
  --warning: #ff9f0a;
  --warning-light: rgba(255, 159, 10, 0.1);
  --border: #d2d2d7;
  --border-light: #e5e5ea;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1), 0 8px 20px rgba(0,0,0,0.06);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro KR", "SF Pro Text", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1d1f;
    --card: #2c2c2e;
    --text: #f5f5f7;
    --text-secondary: #98989d;
    --text-tertiary: #6e6e73;
    --border: #3a3a3c;
    --border-light: #48484a;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
    --shadow: 0 4px 20px rgba(0,0,0,0.3), 0 2px 6px rgba(0,0,0,0.2);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.4), 0 4px 12px rgba(0,0,0,0.3);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.5), 0 8px 20px rgba(0,0,0,0.3);
    --accent-light: rgba(0, 113, 227, 0.15);
    --success-light: rgba(48, 209, 88, 0.15);
    --error-light: rgba(255, 69, 58, 0.15);
    --warning-light: rgba(255, 159, 10, 0.15);
  }
}

html {
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

header {
  text-align: center;
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-light);
}

header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-top: 10px;
  font-weight: 400;
}

.card {
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.input-card {
  padding: 32px;
  margin-bottom: 32px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.input-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.input-field input,
.input-field textarea {
  width: 100%;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.input-field input::placeholder,
.input-field textarea::placeholder {
  color: var(--text-tertiary);
}

.input-field input:focus,
.input-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
  background: var(--card);
}

.input-field textarea {
  min-height: 220px;
  resize: vertical;
  font-family: inherit;
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 8px;
}

.word-count {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition);
}

.word-count.warning {
  color: var(--warning);
}

.word-count.error {
  color: var(--error);
}

.btn {
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 16px rgba(0, 113, 227, 0.3);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 24px rgba(0, 113, 227, 0.4);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  background: var(--border);
  color: var(--text-tertiary);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  background: var(--error-light);
  border: 1px solid var(--error);
  color: var(--error);
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-top: 16px;
  animation: slideDown var(--transition-spring);
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px;
  text-align: center;
  animation: fadeIn var(--transition);
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

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

.loading p {
  color: var(--text-secondary);
  font-size: 15px;
}

.hidden {
  display: none !important;
}

.result-section {
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.report-header {
  text-align: center;
  padding: 32px 24px 24px;
  background: linear-gradient(180deg, var(--accent-light) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 0;
}

.report-header h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 24px;
}

.overall-gauge {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto;
}

.gauge-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.gauge-bg {
  fill: none;
  stroke: var(--border-light);
  stroke-width: 12;
}

.gauge-progress {
  fill: none;
  stroke: url(#gauge-gradient);
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.gauge-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
}

#overall-score {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gauge-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 4px;
}

.section {
  padding: 32px 24px;
  border-bottom: 1px solid var(--border-light);
}

.section:last-of-type {
  border-bottom: none;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 20px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.score-bars {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.score-bar-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.score-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.score-bar-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.score-bar-label .score-icon {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: white;
}

.score-bar-label .score-icon.grammar { background: linear-gradient(135deg, #0071e3, #0077ed); }
.score-bar-label .score-icon.structure { background: linear-gradient(135deg, #30d158, #28c840); }
.score-bar-label .score-icon.originality { background: linear-gradient(135deg, #af52de, #bf5af2); }
.score-bar-label .score-icon.impact { background: linear-gradient(135deg, #ff9f0a, #ffb340); }
.score-bar-label .score-icon.overall { background: linear-gradient(135deg, #ff453a, #ff3326); }

.score-bar-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  min-width: 40px;
  text-align: right;
}

.score-bar-track {
  height: 10px;
  background: var(--border-light);
  border-radius: 5px;
  overflow: hidden;
}

.score-bar-fill {
  height: 100%;
  border-radius: 5px;
  width: 0%;
  transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.score-bar-fill.grammar { background: var(--accent-gradient); }
.score-bar-fill.structure { background: var(--success-gradient); }
.score-bar-fill.originality { background: linear-gradient(135deg, #af52de, #bf5af2); }
.score-bar-fill.impact { background: linear-gradient(135deg, #ff9f0a, #ffb340); }
.score-bar-fill.overall { background: var(--error-gradient); }

.essay-card {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 24px;
  max-height: 500px;
  overflow-y: auto;
}

.essay-text {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
  white-space: pre-wrap;
  word-wrap: break-word;
}

.essay-text .error {
  position: relative;
  text-decoration: underline;
  text-decoration-color: var(--error);
  text-decoration-thickness: 2.5px;
  text-underline-offset: 4px;
  cursor: help;
  transition: background-color 0.15s ease;
}

.essay-text .error:hover {
  background-color: var(--error-light);
  border-radius: 2px;
}

.essay-text .error.type-grammar { text-decoration-color: var(--accent); }
.essay-text .error.type-expression { text-decoration-color: #af52de; }
.essay-text .error.type-vocab { text-decoration-color: var(--warning); }

.perspective-card {
  background: linear-gradient(135deg, var(--accent-light) 0%, rgba(0,113,227,0.03) 100%);
  border: 1px solid rgba(0,113,227,0.15);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.perspective-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent-gradient);
}

.perspective-card p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin: 0;
}

.sw-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.sw-card {
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.sw-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.sw-card.strengths {
  border-top: 3px solid var(--success);
}

.sw-card.weaknesses {
  border-top: 3px solid var(--error);
}

.sw-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.sw-card-icon {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.sw-card.strengths .sw-card-icon {
  background: var(--success-light);
  color: var(--success);
}

.sw-card.weaknesses .sw-card-icon {
  background: var(--error-light);
  color: var(--error);
}

.sw-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.sw-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sw-list li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  padding-left: 18px;
  position: relative;
}

.sw-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.sw-card.strengths .sw-list li::before {
  background: var(--success);
}

.sw-card.weaknesses .sw-list li::before {
  background: var(--error);
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.accordion-item:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  background: var(--card);
  transition: background var(--transition);
}

.accordion-header:hover {
  background: var(--bg);
}

.accordion-header:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.accordion-number {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--accent-gradient);
  color: white;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 16px;
}

.accordion-title {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.accordion-icon {
  width: 24px;
  height: 24px;
  color: var(--text-secondary);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
}

.accordion-item.open .accordion-content {
  max-height: 500px;
  padding: 0 24px 24px;
}

.accordion-content p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
}

.rewrite-card {
  background: linear-gradient(135deg, rgba(175, 82, 222, 0.08) 0%, rgba(191, 90, 242, 0.05) 100%);
  border: 1px solid rgba(175, 82, 222, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}

.rewrite-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, #af52de, #bf5af2);
}

.rewrite-card p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin: 0;
}

.locked-teaser-section {
  padding: 32px 24px 40px;
}

.locked-teaser {
  position: relative;
  background: var(--bg);
  border: 2px dashed var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  overflow: hidden;
}

.locked-teaser::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(0,113,227,0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(175,82,222,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.locked-teaser-content {
  display: flex;
  align-items: center;
  gap: 24px;
  position: relative;
  z-index: 1;
}

.locked-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--border) 0%, var(--border-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.locked-content {
  flex: 1;
  min-width: 0;
}

.locked-content h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.locked-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.locked-badge {
  padding: 8px 16px;
  background: var(--accent-gradient);
  color: white;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: var(--radius);
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0,113,227,0.3);
  flex-shrink: 0;
}

.tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  max-width: 360px;
  animation: tooltipIn 0.15s ease-out;
}

@keyframes tooltipIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.tooltip-content {
  background: #1d1d1f;
  color: white;
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-xl);
  font-size: 13px;
  line-height: 1.6;
}

.tooltip-type {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 10px;
}

.tooltip-type.grammar { background: var(--accent-light); color: var(--accent); }
.tooltip-type.expression { background: rgba(175,82,222,0.2); color: #bf5af2; }
.tooltip-type.vocab { background: var(--warning-light); color: var(--warning); }

.tooltip-original {
  color: #ff6b6b;
  font-weight: 500;
  margin-bottom: 6px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.tooltip-corrected {
  color: #4cd964;
  font-weight: 500;
  margin-bottom: 6px;
}

.tooltip-explanation {
  color: #98989d;
  font-size: 12px;
  line-height: 1.5;
}

.tooltip-arrow {
  position: absolute;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid #1d1d1f;
  bottom: -8px;
  left: 24px;
}

@media (max-width: 768px) {
  .container {
    padding: 24px 16px 60px;
  }
  
  header {
    margin-bottom: 32px;
    padding-bottom: 24px;
  }
  
  header h1 {
    font-size: 26px;
  }
  
  .input-card {
    padding: 24px 20px;
  }
  
  .input-group {
    gap: 20px;
  }
  
  .report-header {
    padding: 24px 20px 16px;
  }
  
  .report-header h2 {
    font-size: 20px;
  }
  
  .overall-gauge {
    width: 150px;
    height: 150px;
  }
  
  #overall-score {
    font-size: 36px;
  }
  
  .section {
    padding: 24px 20px;
  }
  
  .section-title {
    font-size: 16px;
  }
  
  .perspective-card {
    padding: 20px;
  }
  
  .sw-grid {
    grid-template-columns: 1fr;
  }
  
  .accordion-header {
    padding: 16px 20px;
  }
  
  .accordion-item.open .accordion-content {
    padding: 0 20px 20px;
  }
  
  .rewrite-card {
    padding: 20px;
  }
  
  .locked-teaser {
    padding: 24px 20px;
  }
  
  .locked-teaser-content {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  
  .locked-badge {
    align-self: center;
  }
}

@media (max-width: 480px) {
  .input-footer {
    flex-direction: column-reverse;
    gap: 12px;
    align-items: stretch;
  }
  
  .btn-primary {
    width: 100%;
  }
  
  .score-bar-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  
  .score-bar-value {
    min-width: auto;
    text-align: left;
  }
}

.cliche-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
}

.cliche-level {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  padding: 8px 16px;
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

.cliche-reason {
  flex: 1;
  font-size: 15px;
  color: var(--text);
  margin: 0;
  line-height: 1.6;
}

/* ===== 두 열 에세이 레이아웃 (마진 노트 + 연결선) ===== */
.essay-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 24px;
  align-items: start;
  max-height: 600px;
  overflow: hidden;
}

.essay-text-column {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 24px;
  overflow-y: auto;
  max-height: 600px;
}

.essay-text {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: Georgia, "Times New Roman", serif;
}

.essay-text .error {
  position: relative;
  text-decoration: underline;
  text-decoration-color: var(--error);
  text-decoration-thickness: 2.5px;
  text-underline-offset: 4px;
  cursor: help;
  transition: background-color 0.15s ease;
}

.essay-text .error:hover {
  background-color: var(--error-light);
  border-radius: 2px;
}

.essay-text .error.type-grammar { text-decoration-color: var(--accent); }
.essay-text .error.type-expression { text-decoration-color: #af52de; }
.essay-text .error.type-vocab { text-decoration-color: var(--warning); }

/* 마진 노트 컬럼 */
.margin-notes-column {
  position: relative;
  flex-shrink: 0;
}

.margin-lines-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.margin-lines-svg .margin-line {
  stroke: var(--border);
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 4 3;
  transition: stroke 0.2s ease;
}

.margin-lines-svg .margin-line.arrow {
  marker-end: url(#arrowhead);
}

.margin-notes-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 24px;
  padding-left: 8px;
}

.margin-note-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 16px 14px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
  opacity: 0;
  transform: translateX(20px);
  animation: marginNoteIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes marginNoteIn {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.margin-note-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
  border-color: var(--border);
}

.margin-note-card.active {
  border-color: var(--error);
  box-shadow: 0 0 0 2px var(--error-light);
}

.margin-note-card.type-grammar.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-light); }
.margin-note-card.type-expression.active { border-color: #af52de; box-shadow: 0 0 0 2px rgba(175,82,222,0.1); }
.margin-note-card.type-vocab.active { border-color: var(--warning); box-shadow: 0 0 0 2px var(--warning-light); }

.margin-note-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.margin-note-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  color: white;
  flex-shrink: 0;
}

.margin-note-badge.grammar { background: var(--accent-gradient); }
.margin-note-badge.expression { background: linear-gradient(135deg, #af52de, #bf5af2); }
.margin-note-badge.vocab { background: linear-gradient(135deg, #ff9f0a, #ffb340); }

.margin-note-index {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-tertiary);
  font-family: "SF Mono", "Fira Code", monospace;
}

.margin-note-content {
  font-family: "SF Pro KR", "Noto Sans KR", cursive, sans-serif;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.margin-note-correction {
  font-weight: 600;
  color: var(--error);
  margin-bottom: 4px;
  font-family: "SF Pro KR", "Noto Sans KR", "SF Pro Text", sans-serif;
}

.margin-note-explanation {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 모바일: 인라인 메모 확장 */
.margin-note-inline {
  display: none;
  margin-top: 8px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  animation: inlineNoteIn 0.2s ease-out;
}

@keyframes inlineNoteIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.margin-note-inline.open {
  display: block;
}

.essay-text .error.mobile-active {
  background-color: var(--error-light);
  border-radius: 2px;
  text-decoration-color: var(--error);
}

/* 연결선 SVG 마커 */
.margin-lines-svg defs {
  pointer-events: none;
}

/* ===== 대학 공식 기준 대조 카드 ===== */
.evidence-source-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.evidence-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.evidence-card {
  background: var(--card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(10px);
  animation: evidenceCardIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes evidenceCardIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.evidence-card-header {
  margin-bottom: 16px;
}

.evidence-university-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  color: white;
}

.evidence-university-badge.harvard { background: linear-gradient(135deg, #8B0000 0%, #A00000 100%); }
.evidence-university-badge.yale { background: linear-gradient(135deg, #00356B 0%, #0056A0 100%); }
.evidence-university-badge.mit { background: linear-gradient(135deg, #8A8A8A 0%, #A3A3A3 100%); }
.evidence-university-badge.uc { background: linear-gradient(135deg, #003262 0%, #0057B8 100%); }
.evidence-university-badge.gatech { background: linear-gradient(135deg, #B31B1B 0%, #D42D2D 100%); }
.evidence-university-badge.uw { background: linear-gradient(135deg, #4B2E83 0%, #6B3FA0 100%); }
.evidence-university-badge.default { background: linear-gradient(135deg, var(--border) 0%, var(--border-light) 100%); color: var(--text-secondary); }

.evidence-card-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.evidence-criterion, .evidence-application {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 16px;
}

.evidence-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}

.evidence-criterion-text, .evidence-application-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
}

.evidence-application-text {
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .evidence-card {
    padding: 16px 20px;
  }
  
  .evidence-criterion, .evidence-application {
    padding: 12px 16px;
  }
}

/* 반응형: 모바일에서는 마진 노트 컬럼 숨기고 인라인 확장 사용 */
@media (max-width: 900px) {
  .essay-layout {
    grid-template-columns: 1fr;
    gap: 0;
    max-height: none;
    overflow: visible;
  }
  
  .margin-notes-column {
    display: none;
  }
  
  .essay-text-column {
    max-height: none;
  }
}

@media (max-width: 480px) {
  .essay-text-column {
    padding: 16px;
  }
  
  .essay-text {
    font-size: 14px;
    line-height: 1.8;
  }
}