/* ============================================
   ISMS-P Self-Checker — Impeccable Design System
   Canvas #fff | Ink #000 | Signal #2dd4a8
   Zero-ornament minimalism. No purple gradients.
   ============================================ */

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

:root {
  --color-canvas: #ffffff;
  --color-ink: #000000;
  --color-signal: #2dd4a8;
  --color-signal-dark: #1a9e7e;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-border: #e5e7eb;
  --color-text: #1a2332;
  --color-text-secondary: #6b7280;
  --color-text-muted: #78818e;
  --color-bg-alt: #f8f9fa;

  --font-body: 'Pretendard', 'Apple SD Gothic Neo', sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', monospace;

  --radius: 4px;
  --transition: 200ms ease;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
}

.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;
}

.skip-link {
  position: absolute; top: -100%; left: var(--space-4);
  background: var(--color-ink); color: var(--color-canvas);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius);
  z-index: 9999; font-size: 14px; text-decoration: none;
}
.skip-link:focus { top: var(--space-2); }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* --- Header --- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  max-width: 960px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  height: 56px;
}
.logo { display: flex; align-items: center; gap: var(--space-2); }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: var(--color-ink); color: var(--color-canvas);
  font-weight: 700; font-size: 16px; border-radius: var(--radius);
}
.logo-text { font-weight: 700; font-size: 18px; color: var(--color-ink); }

.header-nav { display: flex; gap: var(--space-4); align-items: center; }
.nav-link {
  font-size: 14px; color: var(--color-text-secondary);
  text-decoration: none; transition: color var(--transition);
  padding: var(--space-2) 0; min-height: 44px;
  display: inline-flex; align-items: center;
}
.nav-link:hover { color: var(--color-ink); }
.nav-cta {
  background: var(--color-ink); color: var(--color-canvas);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius);
  font-weight: 700; font-size: 13px;
}
.nav-cta:hover { opacity: 0.85; color: var(--color-canvas); }

/* --- Hero --- */
.hero {
  position: relative; min-height: 520px;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg-img {
  width: 100%; height: 100%; object-fit: cover;
  animation: heroFadeIn 1.2s ease-out;
}
.hero-bg-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.72);
}
.hero-content {
  position: relative; z-index: 1;
  max-width: 960px; margin: 0 auto;
  padding: var(--space-16) var(--space-4);
  animation: slideUp 0.8s ease-out;
}
.hero-badge {
  display: inline-block;
  background: rgba(45,212,168,0.15); color: var(--color-signal);
  padding: var(--space-1) var(--space-3);
  border: 1px solid rgba(45,212,168,0.3);
  border-radius: var(--radius);
  font-size: 13px; font-weight: 700; letter-spacing: 0.5px;
  margin-bottom: var(--space-4);
}
.hero-title {
  font-size: 48px; font-weight: 700; line-height: 1.15;
  color: var(--color-canvas); margin-bottom: var(--space-4);
}
.hero-title .accent { color: var(--color-signal); }
.hero-desc {
  font-size: 17px; color: rgba(255,255,255,0.8);
  max-width: 560px; margin-bottom: var(--space-6);
}
.hero-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-8); }
.hero-stats {
  display: flex; gap: var(--space-8);
}
.stat { display: flex; flex-direction: column; }
.stat-num {
  font-size: 28px; font-weight: 700;
  color: var(--color-signal); font-family: var(--font-mono);
}
.stat-label { font-size: 13px; color: rgba(255,255,255,0.75); }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius); font-size: 15px; font-weight: 700;
  text-decoration: none; cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  min-height: 44px;
}
.btn-primary {
  background: var(--color-ink); color: var(--color-canvas); border-color: var(--color-ink);
}
.btn-primary:hover { opacity: 0.85; }
.btn-primary:focus-visible { outline: 2px solid var(--color-signal); outline-offset: 2px; }
.btn-secondary {
  background: transparent; color: var(--color-ink); border-color: var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-ink); }
.btn-secondary:focus-visible { outline: 2px solid var(--color-signal); outline-offset: 2px; }

/* --- Features --- */
.features {
  padding: var(--space-16) 0;
  background: var(--color-bg-alt);
}
.section-title {
  font-size: 32px; font-weight: 700; text-align: center;
  margin-bottom: var(--space-3); color: var(--color-ink);
}
.section-subtitle {
  text-align: center; color: var(--color-text-secondary);
  font-size: 16px; margin-bottom: var(--space-12);
}
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6);
}
.feature-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  opacity: 0; transform: translateY(24px);
}
.feature-card.visible {
  opacity: 1; transform: translateY(0);
}
.feature-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.feature-card-img {
  width: 100%; height: 180px; overflow: hidden;
}
.feature-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.feature-card:hover .feature-card-img img { transform: scale(1.04); }
.feature-title {
  font-size: 17px; font-weight: 700; padding: var(--space-4) var(--space-4) var(--space-2);
}
.feature-desc {
  font-size: 14px; color: var(--color-text-secondary);
  padding: 0 var(--space-4) var(--space-4);
}

/* --- Checker Section --- */
.checker {
  padding: var(--space-16) 0;
}

/* Dashboard */
.dashboard {
  display: flex; align-items: center; gap: var(--space-8);
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
}
.score-ring-wrapper {
  position: relative; width: 120px; height: 120px; flex-shrink: 0;
}
.score-ring {
  width: 100%; height: 100%;
  transform: rotate(-90deg);
}
.score-ring-bg {
  fill: none; stroke: var(--color-border); stroke-width: 8;
}
.score-ring-fill {
  fill: none; stroke: var(--color-signal); stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 326.73;
  stroke-dashoffset: 326.73;
  transition: stroke-dashoffset 0.8s ease;
}
.score-ring-text {
  position: absolute; inset: 0;
  display: flex; align-items: baseline; justify-content: center;
}
.score-value {
  font-size: 36px; font-weight: 700;
  font-family: var(--font-mono); color: var(--color-ink);
}
.score-unit { font-size: 14px; color: var(--color-text-muted); }

.dashboard-info { flex: 1; }
.dashboard-title { font-size: 18px; font-weight: 700; margin-bottom: var(--space-2); }
.dashboard-meta {
  font-size: 14px; color: var(--color-text-secondary); margin-bottom: var(--space-3);
}
.dashboard-legend { display: flex; gap: var(--space-4); }
.legend-item { font-size: 12px; color: var(--color-text-secondary); padding-left: var(--space-3); position: relative; }
.legend-item::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 8px; height: 8px; border-radius: 50%;
}
.legend-yes::before { background: var(--color-signal); }
.legend-partial::before { background: var(--color-warning); }
.legend-no::before { background: var(--color-danger); }

/* Category Progress Bar */
.category-bar {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--space-2);
  margin-bottom: var(--space-8);
}
.cat-bar-item {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  cursor: pointer; transition: all var(--transition);
  text-align: center;
}
.cat-bar-item:hover { border-color: var(--color-text-secondary); }
.cat-bar-item.active { border-color: var(--color-ink); background: var(--color-canvas); }
.cat-bar-name { font-size: 12px; font-weight: 700; margin-bottom: var(--space-1); }
.cat-bar-progress {
  height: 4px; background: var(--color-border); border-radius: 2px; overflow: hidden;
}
.cat-bar-fill {
  height: 100%; background: var(--color-signal);
  transition: width 0.5s ease; width: 0%;
}
.cat-bar-pct {
  font-size: 11px; color: var(--color-text-muted);
  font-family: var(--font-mono); margin-top: var(--space-1);
}

/* --- Email Gate --- */
.email-gate {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  text-align: center;
}
.email-gate-title { font-size: 22px; font-weight: 700; margin-bottom: var(--space-2); }
.email-gate-desc { color: var(--color-text-secondary); margin-bottom: var(--space-4); font-size: 15px; }
.email-form {
  display: flex; gap: var(--space-2); max-width: 440px; margin: 0 auto var(--space-3);
}
.email-input {
  flex: 1; padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border); border-radius: var(--radius);
  font-family: var(--font-body); font-size: 15px;
  transition: border-color var(--transition);
  min-height: 44px;
}
.email-input:focus { outline: none; border-color: var(--color-ink); }
.email-input.error { border-color: var(--color-danger); }
.email-btn { white-space: nowrap; }
.email-privacy { font-size: 12px; color: var(--color-text-muted); }

/* --- Checklist --- */
.checklist-category {
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  animation: fadeIn 0.4s ease;
}
.checklist-category-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4);
  background: var(--color-bg-alt);
  cursor: pointer; user-select: none;
  transition: background var(--transition);
}
.checklist-category-header:hover { background: #f0f1f3; }
.checklist-category-name { font-weight: 700; font-size: 16px; }
.checklist-category-meta { display: flex; align-items: center; gap: var(--space-3); }
.checklist-category-score {
  font-family: var(--font-mono); font-size: 14px; font-weight: 700;
  color: var(--color-signal);
}
.checklist-category-toggle {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--transition);
}
.checklist-category-toggle.collapsed { transform: rotate(-90deg); }

.checklist-items { border-top: 1px solid var(--color-border); }
.checklist-items.collapsed { display: none; }

.checklist-item {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}
.checklist-item:last-child { border-bottom: none; }
.checklist-item:hover { background: var(--color-bg-alt); }
.checklist-item-num {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--color-text-muted); min-width: 32px;
}
.checklist-item-text { flex: 1; font-size: 14px; line-height: 1.5; }

.checklist-item-options {
  display: flex; gap: var(--space-2); flex-shrink: 0;
}
.opt-btn {
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border); border-radius: var(--radius);
  font-size: 12px; font-weight: 700; cursor: pointer;
  background: var(--color-canvas); color: var(--color-text-secondary);
  transition: all var(--transition);
  min-height: 44px; min-width: 56px; text-align: center;
}
.opt-btn:hover { border-color: var(--color-text-secondary); }
.opt-btn:focus-visible { outline: 2px solid var(--color-signal); outline-offset: 1px; }
.opt-btn.selected-yes { background: var(--color-signal); color: var(--color-canvas); border-color: var(--color-signal); }
.opt-btn.selected-partial { background: var(--color-warning); color: var(--color-canvas); border-color: var(--color-warning); }
.opt-btn.selected-no { background: var(--color-danger); color: var(--color-canvas); border-color: var(--color-danger); }

/* --- Results Panel --- */
.results-panel {
  margin-top: var(--space-8);
  animation: fadeIn 0.5s ease;
}
.results-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-6); flex-wrap: wrap; gap: var(--space-3);
}
.results-title { font-size: 22px; font-weight: 700; }
.results-actions { display: flex; gap: var(--space-2); }

.results-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.result-card {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
}
.result-card-title { font-size: 14px; font-weight: 700; margin-bottom: var(--space-3); }
.result-card-bar {
  height: 8px; background: var(--color-border); border-radius: 4px; overflow: hidden; margin-bottom: var(--space-2);
}
.result-card-fill {
  height: 100%; border-radius: 4px; transition: width 0.8s ease;
}
.result-card-fill.high { background: var(--color-signal); }
.result-card-fill.mid { background: var(--color-warning); }
.result-card-fill.low { background: var(--color-danger); }
.result-card-pct {
  font-family: var(--font-mono); font-size: 14px; font-weight: 700;
}
.result-card-detail {
  font-size: 12px; color: var(--color-text-secondary); margin-top: var(--space-2);
}

.results-cta {
  text-align: center; padding: var(--space-8);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.results-cta-text { margin-bottom: var(--space-4); font-size: 16px; color: var(--color-text-secondary); }

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3);
}
.footer-brand { display: flex; align-items: center; gap: var(--space-2); }
.footer-copy { font-size: 13px; color: var(--color-text-muted); }
.footer-links { display: flex; gap: var(--space-4); }
.footer-links a {
  font-size: 13px; color: var(--color-text-secondary); text-decoration: none;
}
.footer-links a:hover { color: var(--color-ink); }

/* --- Animations --- */
@keyframes heroFadeIn {
  from { opacity: 0; transform: scale(1.04); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- Print Styles --- */
@media print {
  .header, .hero, .features, .email-gate, .results-actions, .results-cta, .footer,
  .checklist-category-toggle, .opt-btn { display: none !important; }

  body { font-size: 12px; color: #000; background: #fff; }
  .checker { padding: 0; }
  .checklist-category { break-inside: avoid; border: 1px solid #ccc; }
  .checklist-item { padding: 4px 8px; }
  .results-panel { display: block !important; }
  .results-grid { grid-template-columns: repeat(3, 1fr); }
  .result-card { border: 1px solid #ccc; }
  .dashboard { border: 1px solid #ccc; }

  .checklist-item-options::after {
    font-size: 11px; font-weight: 700;
  }
}

/* --- Responsive --- */
@media (max-width: 1023px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 36px; }
  .category-bar { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
}

@media (max-width: 639px) {
  .feature-grid { grid-template-columns: 1fr; }
  .hero { min-height: 420px; }
  .hero-title { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .hero-stats { gap: var(--space-4); }
  .stat-num { font-size: 22px; }
  .section-title { font-size: 24px; }

  .header-nav { display: none; }

  .dashboard { flex-direction: column; text-align: center; padding: var(--space-4); }
  .dashboard-legend { justify-content: center; }

  .category-bar { grid-template-columns: repeat(2, 1fr); }

  .checklist-item { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .checklist-item-options { align-self: flex-end; }

  .email-form { flex-direction: column; }

  .results-grid { grid-template-columns: 1fr; }
  .results-header { flex-direction: column; align-items: flex-start; }
  .footer-inner { flex-direction: column; text-align: center; }
}