/* ============================================================
   tokens.css — Spatial Editorial Design System
   littlestory.co.kr
   ============================================================ */

/* ① CSS Variables */
:root {
  --color-bg:           #F9F9F6;
  --color-border:       #E5E5E0;
  --color-ink:          #1C1B1A;
  --color-accent:       #FF4F00;
  --color-accent-hover: #E04600;
  --color-ink-muted:    rgba(28, 27, 26, 0.45);
  --color-surface:      #FFFFFF;
  --color-surface-raised: #F2F2EE;
  --color-error:        #C0392B;
  --color-success:      #2D6A4F;

  --font-display: "GT Sectra", "Tiempos Headline", Georgia, serif;
  --font-body:    "Inter", "Pretendard", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --fs-display: 4.768rem;
  --fs-h1:      3.052rem;
  --fs-h2:      2.441rem;
  --fs-h3:      1.953rem;
  --fs-lead:    1.25rem;
  --fs-body:    1rem;
  --fs-caption: 0.8rem;

  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  96px;

  --max-w:        1440px;
  --radius-sm:    8px;
  --radius-md:    12px;
  --radius-lg:    20px;
  --radius-pill:  999px;

  --ease:       cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur-micro:  120ms;
  --dur-base:   240ms;
  --dur-slow:   480ms;
  --dur-hero:   720ms;
}

/* ② Minimal Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.6;
  min-height: 100dvh;
}
img, video { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; }
a { color: inherit; text-decoration: none; }

/* ③ 공통 레이아웃 */
.page-wrapper {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 64px);
  padding-bottom: var(--space-9);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-5);
}

.span-1  { grid-column: span 1; }
.span-2  { grid-column: span 2; }
.span-3  { grid-column: span 3; }
.span-4  { grid-column: span 4; }
.span-5  { grid-column: span 5; }
.span-6  { grid-column: span 6; }
.span-7  { grid-column: span 7; }
.span-8  { grid-column: span 8; }
.span-9  { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.span-12 { grid-column: span 12; }

@media (max-width: 900px) {
  .span-5, .span-7 { grid-column: span 12; }
  .span-4          { grid-column: span 6; }
  .span-8          { grid-column: span 6; }
}
@media (max-width: 600px) {
  .bento-grid { gap: var(--space-3); }
  .span-4, .span-6, .span-8 { grid-column: span 12; }
}

/* ④ 카드 */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.card__label {
  display: block;
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
}
.card__title {
  font-size: var(--fs-lead);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

/* ⑤ 버튼 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  font-size: var(--fs-body);
  border-radius: var(--radius-pill);
  padding: 14px 28px;
  transition: background var(--dur-base) var(--ease),
              transform var(--dur-micro) var(--ease);
  letter-spacing: -0.01em;
}
.btn-primary:hover  { background: var(--color-accent-hover); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled {
  background: var(--color-border);
  color: var(--color-ink-muted);
  cursor: not-allowed;
  pointer-events: none;
}
.btn-primary.btn--full { width: 100%; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: transparent;
  color: var(--color-ink);
  font-weight: 600;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-pill);
  padding: 13px 27px;
  transition: background var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease);
}
.btn-ghost:hover {
  background: var(--color-ink);
  color: var(--color-bg);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  color: var(--color-ink);
  background: var(--color-surface);
  font-size: 1rem;
  transition: background var(--dur-micro) var(--ease),
              border-color var(--dur-micro) var(--ease);
}
.btn-icon:hover { background: var(--color-surface-raised); }
.btn-icon--danger { border-color: transparent; }
.btn-icon--danger:hover { background: rgba(192,57,43,0.08); color: var(--color-error); }

/* ⑥ 폼 요소 */
.form-input,
.form-select {
  width: 100%;
  padding: 12px var(--space-4);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: var(--fs-body);
  transition: border-color var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease);
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus,
.form-select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-color: var(--color-accent);
  background: var(--color-surface);
}
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%231C1B1A' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-label {
  display: block;
  font-size: var(--fs-caption);
  font-weight: 600;
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }

/* ⑦ 세그먼트 컨트롤 (radio-chip-group) */
.radio-chip-group {
  display: flex;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4px;
  gap: 4px;
}
.radio-chip-group input[type="radio"] { display: none; }
.radio-chip {
  flex: 1;
  text-align: center;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--color-ink-muted);
  cursor: pointer;
  transition: all var(--dur-base) var(--ease);
  user-select: none;
  line-height: 1.4;
}
.radio-chip-group input[type="radio"]:checked + .radio-chip {
  background: var(--color-surface);
  color: var(--color-ink);
  font-weight: 700;
  box-shadow: 0 1px 4px rgba(28, 27, 26, 0.08);
}
.radio-chip-group input[type="radio"]:disabled + .radio-chip {
  opacity: 0.35;
  cursor: not-allowed;
  text-decoration: line-through;
}
.radio-chip-group input[type="radio"]:focus-visible + .radio-chip {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ⑧ 상단 네비게이션 */
.nav-top {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 64px);
  background: rgba(249, 249, 246, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.nav-logo span { color: var(--color-accent); }

/* ⑨ 스텝 인디케이터 */
.step-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-caption);
  font-weight: 600;
}
.step-indicator .step {
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted);
  border: 1px solid transparent;
}
.step-indicator .step.active {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-ink);
}
.step-indicator .step.current {
  background: var(--color-ink);
  color: var(--color-bg);
}
.step-sep { color: var(--color-border); font-size: 0.75rem; }

/* ⑩ 로딩 스크린 */
.loading-screen {
  position: fixed;
  inset: 0;
  background: rgba(249, 249, 246, 0.92);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  z-index: 9999;
}
.loading-screen[hidden] { display: none; }
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.loading-text { font-size: var(--fs-lead); font-weight: 600; color: var(--color-ink); margin: 0; }
.loading-pct {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
  font-feature-settings: 'tnum';
  font-variant-numeric: tabular-nums;
  margin: 0;
  line-height: 1;
}
.loading-detail {
  font-size: var(--fs-caption);
  color: var(--color-ink-muted);
  margin: 0;
  text-align: center;
  min-height: 1.2em;
}
.progress-thin {
  width: 240px;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
}
.progress-thin__fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 2px;
  transition: width 0.25s linear;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ⑪ 모달 오버레이 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(28, 27, 26, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease);
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.modal-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  width: 100%;
  max-width: 480px;
  max-height: 90dvh;
  overflow-y: auto;
  transform: scale(0.96) translateY(8px);
  transition: transform var(--dur-base) var(--ease);
}
.modal-overlay.active .modal-card {
  transform: scale(1) translateY(0);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.modal-title {
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.modal-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ⑫ 배지 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-caption);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.badge--default {
  background: var(--color-surface-raised);
  color: var(--color-ink-muted);
  border: 1px solid var(--color-border);
}
.badge--accent {
  background: var(--color-accent);
  color: var(--color-bg);
}
.badge--success {
  background: rgba(45, 106, 79, 0.1);
  color: var(--color-success);
}

/* ⑬ 접근성 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ⑭ Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}