/* Pretty Box Styles v1.0 (drop-in) */
:root {
  --box-bg: #ffffff;
  --box-fg: #1f2937;
  --box-muted: #6b7280;
  --box-border: #e5e7eb;
  --box-radius: 12px;
  --box-px: 16px;
  --box-py: 14px;
  --shadow-1: 0 1px 2px rgba(0,0,0,.06),
              0 1px 1px rgba(0,0,0,.04);
  --shadow-2: 0 8px 16px rgba(0,0,0,.12);
  --ring: 0 0 0 3px rgba(59,130,246,.15);

  --accent: #3b82f6;  /* primary */
  --success: #10b981;
  --warning: #f59e0b;
  --danger:  #ef4444;
  --info:    #0ea5e9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --box-bg: #0b1220;
    --box-fg: #e5e7eb;
    --box-muted: #9ca3af;
    --box-border: #1f2937;
    --shadow-1: 0 1px 2px rgba(0,0,0,.5),
                0 2px 4px rgba(0,0,0,.35);
    --shadow-2: 0 10px 22px rgba(0,0,0,.55);
    --ring: 0 0 0 3px rgba(59,130,246,.25);
  }
}

/* Base */
.box {
  background: var(--box-bg);
  color: var(--box-fg);
  border: 1px solid var(--box-border);
  border-radius: var(--box-radius);
  padding: var(--box-py) var(--box-px);
  line-height: 1.5;
}

.box__title {
  margin: 0 0 8px 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.box__subtitle {
  margin: -4px 0 10px 0;
  color: var(--box-muted);
  font-size: .9rem;
}

.box__actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.box a {
  color: color-mix(in oklab, var(--accent) 90%, #000);
  text-decoration: none;
}
.box a:hover { text-decoration: underline; }

/* Elevation + hover */
.box--shadow { box-shadow: var(--shadow-1); }
.box--shadow:hover { box-shadow: var(--shadow-2); }

.box--hover-lift {
  transition: transform .18s ease, box-shadow .18s ease;
}
.box--hover-lift:hover { transform: translateY(-2px); }

/* Accent stripe (깔끔한 포인트) */
.box--accent {
  border-left: 4px solid var(--accent);
  padding-left: calc(var(--box-px) * 2 - 4px);
  background:
    linear-gradient(90deg,
      color-mix(in oklab, var(--accent) 12%, transparent),
      transparent 40%);
}

/* Tinted tones (안내/성공/경고/위험/정보) */
.box--tone-primary {
  border-color:
    color-mix(in oklab, var(--accent) 35%, var(--box-border));
  background:
    linear-gradient(0deg,
      color-mix(in oklab, var(--accent) 8%, transparent),
      transparent);
}
.box--tone-success {
  border-color:
    color-mix(in oklab, var(--success) 35%, var(--box-border));
  background:
    linear-gradient(0deg,
      color-mix(in oklab, var(--success) 8%, transparent),
      transparent);
}
.box--tone-warning {
  border-color:
    color-mix(in oklab, var(--warning) 35%, var(--box-border));
  background:
    linear-gradient(0deg,
      color-mix(in oklab, var(--warning) 10%, transparent),
      transparent);
}
.box--tone-danger {
  border-color:
    color-mix(in oklab, var(--danger) 35%, var(--box-border));
  background:
    linear-gradient(0deg,
      color-mix(in oklab, var(--danger) 8%, transparent),
      transparent);
}
.box--tone-info {
  border-color:
    color-mix(in oklab, var(--info) 35%, var(--box-border));
  background:
    linear-gradient(0deg,
      color-mix(in oklab, var(--info) 8%, transparent),
      transparent);
}

/* Gradient hero */
.box--gradient {
  background:
    linear-gradient(135deg,
      color-mix(in oklab, var(--accent) 85%, #ffffff) 0%,
      color-mix(in oklab, var(--info) 85%, #ffffff) 100%);
  color: #ffffff;
  border: 0;
  box-shadow:
    0 4px 16px rgba(0,0,0,.15),
    inset 0 0 0 1px rgba(255,255,255,.08);
}

/* Glassmorphism (반투명) */
.box--glass {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 6px 24px rgba(0,0,0,.25);
  backdrop-filter: blur(10px);
}
@supports not ((backdrop-filter: blur(10px))) {
  .box--glass {
    background:
      color-mix(in oklab, var(--box-bg) 85%, #ffffff);
  }
}

/* Outline/dashed */
.box--outline {
  background: transparent;
  border: 1.5px dashed var(--box-border);
}

/* Neumorphism (단색 배경에서 사용 권장) */
.box--neo {
  border: 0;
  background: var(--box-bg);
  box-shadow:
    8px 8px 18px rgba(0,0,0,.15),
    -6px -6px 14px rgba(255,255,255,.2);
}

/* Chat bubble (말풍선) */
.box--bubble { position: relative; }
.box--bubble::after {
  content: "";
  position: absolute;
  left: 18px;
  bottom: -8px;
  width: 14px;
  height: 14px;
  background: inherit;
  border: inherit;
  border-top-color: transparent;
  border-right-color: transparent;
  transform: rotate(45deg);
}

/* Ribbon corner label (data-label로 텍스트 지정) */
.box--ribbon { position: relative; overflow: hidden; }
.box--ribbon::before {
  content: attr(data-label);
  position: absolute;
  top: 12px;
  right: -36px;
  padding: 4px 48px;
  background: var(--accent);
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  transform: rotate(45deg);
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}

/* Utilities */
.box--tight { padding: 10px 12px; }
.box--loose { padding: 22px 20px; }
.box--center { text-align: center; }
.box--clickable { cursor: pointer; }

@media (prefers-reduced-motion: reduce) {
  .box--hover-lift, .box--shadow { transition: none; }
}