/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #000000;
  --canvas: #ffffff;
  --signal: #0052cc;
  --signal-light: #e8f0fe;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #a3a3a3;
  --gray-600: #525252;
  --gray-800: #262626;
  --red: #dc2626;
  --red-light: #fef2f2;
  --amber: #d97706;
  --amber-light: #fffbeb;
  --green: #16a34a;
  --green-light: #f0fdf4;
  --radius: 4px;
  --transition: 200ms ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
}

/* ===== Typography ===== */
h1, h2, h3 { font-weight: 700; line-height: 1.2; }
h1 { font-size: 48px; letter-spacing: -0.02em; }
h2 { font-size: 32px; letter-spacing: -0.01em; }
h3 { font-size: 20px; }

.mono { font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace; }

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-32px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(32px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes countUp {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes barGrow {
  from { width: 0; }
}

@keyframes drawLine {
  from { stroke-dashoffset: 1000; }
  to { stroke-dashoffset: 0; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 64px 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 55%;
  height: 100%;
  background: url('https://images.unsplash.com/photo-1667372283587-e1557c08aca4?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3w5MjcyNzV8MHwxfHNlYXJjaHwxfHxrdWJlcm5ldGVzJTIwY2xvdWQlMjBpbmZyYXN0cnVjdHVyZXxlbnwwfHx8fDE3NzgyMDU1OTd8MA&ixlib=rb-4.1.0&q=80&w=1080') center/cover no-repeat;
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
  animation: fadeIn 1s ease;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 55%;
  height: 100%;
  background: rgba(0,0,0,0.55);
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 50%;
  animation: slideInLeft 0.8s ease;
}

.hero-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--signal-light);
  color: var(--signal);
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero h1 {
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-desc {
  font-size: 18px;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-stats {
  display: flex;
  gap: 40px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stat-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--signal);
  display: block;
}

.hero-stat-label {
  font-size: 14px;
  color: var(--gray-600);
}

/* ===== Image Credit ===== */
.img-credit {
  position: absolute;
  bottom: 8px;
  right: 16px;
  z-index: 2;
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 8px;
}
.img-credit:hover { color: rgba(255,255,255,0.9); }

/* ===== Section ===== */
.section {
  padding: 80px 0;
}

.section-header {
  margin-bottom: 48px;
}

.section-header h2 {
  margin-bottom: 8px;
}

.section-header p {
  color: var(--gray-600);
  font-size: 18px;
}

/* ===== Input Section ===== */
.input-section {
  background: var(--gray-100);
  padding: 80px 0;
}

.input-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 32px;
}

.input-tab {
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-600);
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  font-family: inherit;
}

.input-tab:hover { color: var(--ink); }

.input-tab.active {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.input-panel { display: none; }
.input-panel.active { display: block; animation: fadeIn 0.3s ease; }

textarea {
  width: 100%;
  min-height: 200px;
  padding: 16px;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 13px;
  line-height: 1.5;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--ink);
  resize: vertical;
  transition: border-color var(--transition);
}

textarea:focus {
  border-color: var(--signal);
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

textarea::placeholder { color: var(--gray-400); }

.input-hint {
  margin-top: 8px;
  font-size: 13px;
  color: var(--gray-400);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  min-height: 48px;
}

.btn-primary {
  background: var(--signal);
  color: var(--canvas);
}

.btn-primary:hover { background: #003d99; }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  background: var(--canvas);
  color: var(--ink);
  border: 1px solid var(--gray-200);
}

.btn-secondary:hover { border-color: var(--gray-400); }

.btn-ghost {
  background: transparent;
  color: var(--signal);
  padding: 14px 16px;
}

.btn-ghost:hover { background: var(--signal-light); }

.btn-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ===== Manual Entry ===== */
.manual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--gray-600);
  margin-bottom: 4px;
}

.form-group input, .form-group select {
  width: 100%;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 15px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--ink);
  transition: border-color var(--transition);
}

.form-group input:focus, .form-group select:focus {
  border-color: var(--signal);
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

.resource-entries { margin-top: 24px; }

.resource-entry {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr 40px;
  gap: 8px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--gray-200);
  animation: fadeInUp 0.3s ease;
}

.resource-entry input {
  width: 100%;
  padding: 8px;
  font-size: 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace;
}

.resource-entry input:focus {
  border-color: var(--signal);
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.btn-remove {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--gray-400);
  font-size: 18px;
  transition: all var(--transition);
}

.btn-remove:hover {
  border-color: var(--red);
  color: var(--red);
}

.entry-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr 40px;
  gap: 8px;
  padding: 8px 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Results Section ===== */
.results-section { display: none; }
.results-section.active { display: block; }

/* Summary Cards */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 48px;
}

.summary-card {
  padding: 24px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--canvas);
  animation: countUp 0.5s ease both;
}

.summary-card:nth-child(1) { animation-delay: 0.1s; }
.summary-card:nth-child(2) { animation-delay: 0.2s; }
.summary-card:nth-child(3) { animation-delay: 0.3s; }
.summary-card:nth-child(4) { animation-delay: 0.4s; }

.summary-card-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--gray-600);
  margin-bottom: 8px;
}

.summary-card-value {
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 4px;
}

.summary-card-sub {
  font-size: 13px;
  color: var(--gray-400);
}

.summary-card.danger .summary-card-value { color: var(--red); }
.summary-card.warning .summary-card-value { color: var(--amber); }
.summary-card.success .summary-card-value { color: var(--green); }
.summary-card.info .summary-card-value { color: var(--signal); }

/* Health Score */
.health-score-wrapper {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 32px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 48px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.health-gauge {
  width: 120px;
  height: 120px;
  position: relative;
  flex-shrink: 0;
}

.health-gauge svg { transform: rotate(-90deg); }

.health-gauge-bg {
  fill: none;
  stroke: var(--gray-200);
  stroke-width: 8;
}

.health-gauge-fill {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.5s ease;
}

.health-gauge-text {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  font-weight: 700;
}

.health-details { flex: 1; }
.health-details h3 { margin-bottom: 8px; }
.health-details p { color: var(--gray-600); font-size: 15px; }

/* Severity Breakdown */
.severity-bar {
  display: flex;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 16px;
  background: var(--gray-200);
}

.severity-segment {
  height: 100%;
  transition: width 0.8s ease;
}

.severity-critical { background: var(--red); }
.severity-warning { background: var(--amber); }
.severity-info { background: var(--signal); }
.severity-ok { background: var(--green); }

.severity-legend {
  display: flex;
  gap: 24px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--gray-600);
}

.severity-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

/* Charts */
.chart-row {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  margin-bottom: 48px;
}

.chart-card {
  padding: 24px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  animation: fadeInUp 0.6s ease 0.4s both;
}

.chart-card h3 {
  font-size: 16px;
  margin-bottom: 16px;
}

.chart-canvas-wrapper {
  position: relative;
  height: 280px;
}

/* Namespace Breakdown */
.namespace-bars { margin-top: 16px; }

.namespace-bar-item {
  display: grid;
  grid-template-columns: 120px 1fr 60px;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
  animation: fadeInUp 0.4s ease both;
}

.namespace-bar-item:nth-child(1) { animation-delay: 0.1s; }
.namespace-bar-item:nth-child(2) { animation-delay: 0.15s; }
.namespace-bar-item:nth-child(3) { animation-delay: 0.2s; }
.namespace-bar-item:nth-child(4) { animation-delay: 0.25s; }
.namespace-bar-item:nth-child(5) { animation-delay: 0.3s; }

.namespace-name {
  font-size: 13px;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.namespace-bar-track {
  height: 24px;
  background: var(--gray-100);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.namespace-bar-fill {
  height: 100%;
  border-radius: var(--radius);
  transition: width 1s ease;
  animation: barGrow 1s ease both;
}

.namespace-bar-fill.critical { background: var(--red); }
.namespace-bar-fill.warning { background: var(--amber); }
.namespace-bar-fill.info { background: var(--signal); }
.namespace-bar-fill.ok { background: var(--green); }

.namespace-value {
  font-size: 13px;
  font-weight: 700;
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
}

/* Detail Table */
.detail-table-wrapper {
  overflow-x: auto;
  margin-bottom: 48px;
  animation: fadeInUp 0.6s ease 0.5s both;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.detail-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--gray-200);
  white-space: nowrap;
}

.detail-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-200);
  vertical-align: middle;
}

.detail-table tbody tr {
  transition: background var(--transition);
}

.detail-table tbody tr:hover { background: var(--gray-100); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius);
}

.badge-critical { background: var(--red-light); color: var(--red); }
.badge-warning { background: var(--amber-light); color: var(--amber); }
.badge-info { background: var(--signal-light); color: var(--signal); }
.badge-ok { background: var(--green-light); color: var(--green); }

.waste-bar {
  width: 80px;
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-left: 8px;
}

.waste-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

/* Recommendations */
.rec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 48px;
}

.rec-card {
  padding: 24px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  animation: fadeInUp 0.5s ease both;
  transition: border-color var(--transition);
}

.rec-card:hover { border-color: var(--signal); }

.rec-card:nth-child(odd) { animation-delay: 0.1s; }
.rec-card:nth-child(even) { animation-delay: 0.2s; }

.rec-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.rec-card-title {
  font-size: 15px;
  font-weight: 700;
}

.rec-savings {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
}

.rec-card-desc {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}

.rec-card-action {
  margin-top: 12px;
  font-size: 13px;
  color: var(--signal);
  font-weight: 700;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  background: var(--gray-100);
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 12px;
}

.cta-section p {
  color: var(--gray-600);
  font-size: 18px;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn-primary {
  font-size: 18px;
  padding: 16px 48px;
}

/* ===== Feature Section ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.feature-card {
  padding: 32px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  animation: fadeInUp 0.6s ease both;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }

.feature-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--signal);
}

.feature-card p {
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== Image Feature ===== */
.image-feature {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 48px;
}

.image-feature.reverse {
  grid-template-columns: 1.2fr 0.8fr;
}

.image-feature .feature-img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius);
  animation: fadeIn 0.8s ease;
}

.image-feature .feature-text {
  animation: slideInRight 0.6s ease;
}

.image-feature.reverse .feature-text {
  animation: slideInLeft 0.6s ease;
}

/* ===== Loading State ===== */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.9);
  z-index: 100;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
}

.loading-overlay.active { display: flex; }

.loading-spinner {
  width: 48px; height: 48px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--signal);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 15px;
  color: var(--gray-600);
  animation: pulse 1.5s ease infinite;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  display: none;
}

.empty-state.active { display: block; }

.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.empty-state h3 {
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--gray-600);
  margin-bottom: 24px;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 24px;
  background: var(--ink);
  color: var(--canvas);
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius);
  z-index: 200;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.active {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { background: var(--green); }
.toast.error { background: var(--red); }

/* ===== Footer ===== */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--gray-200);
  text-align: center;
  font-size: 13px;
  color: var(--gray-400);
}

footer a {
  color: var(--signal);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 0;
}

footer a:hover { text-decoration: underline; }

/* ===== Scroll to top ===== */
.scroll-top {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 44px; height: 44px;
  background: var(--canvas);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition);
  z-index: 50;
  font-size: 20px;
}

.scroll-top.visible { opacity: 1; }
.scroll-top:hover { border-color: var(--signal); color: var(--signal); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }

  .hero { min-height: auto; padding: 48px 0; }
  .hero::before, .hero::after { display: none; }
  .hero-content { width: 100%; }

  .hero-stats { flex-wrap: wrap; gap: 24px; }

  .summary-grid { grid-template-columns: 1fr 1fr; }
  .chart-row { grid-template-columns: 1fr; }
  .rec-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .image-feature,
  .image-feature.reverse { grid-template-columns: 1fr; }
  .manual-grid { grid-template-columns: 1fr; }

  .health-score-wrapper { flex-direction: column; text-align: center; }

  .resource-entry {
    grid-template-columns: 1fr 1fr;
    gap: 4px;
  }

  .entry-header { display: none; }

  .namespace-bar-item {
    grid-template-columns: 80px 1fr 50px;
  }

  .detail-table { font-size: 12px; }
  .detail-table th, .detail-table td { padding: 8px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .summary-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
}