/* Toss-inspired design system — clean, minimal, friendly. */
:root {
  --color-bg: #f9fafb;
  --color-surface: #ffffff;
  --color-surface-muted: #f2f4f6;
  --color-text: #191f28;
  --color-text-secondary: #4e5968;
  --color-text-tertiary: #8b95a1;
  --color-border: #e5e8eb;
  --color-divider: #f2f4f6;
  --color-primary: #3182f6;
  --color-primary-hover: #1b64da;
  --color-primary-soft: #e8f3ff;
  --color-success: #00c896;
  --color-warning: #ff9500;
  --color-danger: #f04452;
  --color-danger-soft: #ffe5e7;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px rgba(0, 23, 51, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 23, 51, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 23, 51, 0.08);

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

  --max-content: 1120px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans KR", sans-serif;
}

* { box-sizing: border-box; }
html, body { padding: 0; margin: 0; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
  line-height: 1.5;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

/* ---------- Layout ---------- */
.app { min-height: 100vh; display: flex; flex-direction: column; }

.appbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.appbar-inner {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; color: var(--color-text); font-size: 17px;
}
.brand .logo {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, #3182f6, #6ea8ff);
  display: inline-flex; align-items: center; justify-content: center;
  color: white; font-weight: 800; font-size: 14px;
}
.navlinks { display: flex; gap: 4px; }
.navlink {
  padding: 8px 12px; border-radius: 10px; color: var(--color-text-secondary);
  font-size: 14px; font-weight: 600;
}
.navlink:hover { background: var(--color-surface-muted); color: var(--color-text); }
.navlink.active { background: var(--color-primary-soft); color: var(--color-primary); }

.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 24px 20px 64px;
  width: 100%;
}

.page-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-bottom: 24px; flex-wrap: wrap;
}
.page-title { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; margin: 0; }
.page-subtitle { color: var(--color-text-secondary); margin-top: 4px; font-size: 14px; }

/* ---------- Card ---------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.card + .card { margin-top: 16px; }
.card-title { font-size: 15px; font-weight: 700; margin: 0 0 12px; }
.card-subtitle { color: var(--color-text-tertiary); font-size: 13px; margin-bottom: 16px; }

/* ---------- Grid helpers ---------- */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 880px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- Stat card ---------- */
.stat {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}
.stat-label { color: var(--color-text-tertiary); font-size: 13px; font-weight: 600; }
.stat-value { font-size: 28px; font-weight: 800; letter-spacing: -0.02em; margin-top: 4px; }
.stat-sub { font-size: 12px; color: var(--color-text-tertiary); margin-top: 2px; }

/* ---------- Button ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  background: var(--color-surface-muted);
  color: var(--color-text);
  transition: transform 0.05s ease, background 0.15s ease, color 0.15s ease;
}
.btn:active { transform: scale(0.98); }
.btn:hover { background: #e7ebee; }

.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: var(--color-primary-hover); color: white; }

.btn-ghost { background: transparent; color: var(--color-text-secondary); }
.btn-ghost:hover { background: var(--color-surface-muted); }

.btn-danger { background: var(--color-danger-soft); color: var(--color-danger); }
.btn-danger:hover { background: #ffd6da; color: var(--color-danger); }

.btn-block { width: 100%; }
.btn-sm { padding: 8px 12px; font-size: 13px; border-radius: 10px; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Form ---------- */
label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 6px; color: var(--color-text); }
.help-text { color: var(--color-text-tertiary); font-size: 12px; margin-top: 4px; }
.field { margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .field-row { grid-template-columns: 1fr; } }

input[type="text"], input[type="email"], input[type="number"], input[type="url"],
input[type="file"], select, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 15px;
  font-family: inherit;
  color: var(--color-text);
  transition: border-color 0.15s ease, background 0.15s ease;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: white;
  box-shadow: 0 0 0 4px rgba(49, 130, 246, 0.12);
}
textarea { resize: vertical; min-height: 96px; }

.errorlist { color: var(--color-danger); font-size: 13px; margin: 6px 0 0; padding-left: 18px; }

/* ---------- Badge ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 700;
  background: var(--color-surface-muted); color: var(--color-text-secondary);
}
.badge-primary { background: var(--color-primary-soft); color: var(--color-primary); }
.badge-success { background: #d6f6ec; color: #00875c; }
.badge-warning { background: #fff1d6; color: #b76500; }
.badge-danger { background: var(--color-danger-soft); color: var(--color-danger); }

/* ---------- Track row ---------- */
.track-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 12px; align-items: center;
  padding: 12px;
  border-radius: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  margin-bottom: 8px;
}
.track-cover {
  width: 56px; height: 56px; border-radius: 10px; background: var(--color-surface-muted);
  background-size: cover; background-position: center;
  flex-shrink: 0;
}
.track-title { font-weight: 700; }
.track-meta { color: var(--color-text-tertiary); font-size: 12px; }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
  margin-bottom: 16px;
}
.toolbar input[type="text"] { max-width: 280px; }
.toolbar select { max-width: 200px; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex; gap: 4px; border-bottom: 1px solid var(--color-divider);
  margin-bottom: 16px; overflow-x: auto;
}
.tab {
  padding: 10px 14px; font-weight: 700; font-size: 14px;
  color: var(--color-text-secondary); cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Messages ---------- */
.toast-stack {
  position: fixed; right: 16px; bottom: 16px;
  display: flex; flex-direction: column; gap: 8px; z-index: 100;
}
.toast {
  background: var(--color-text); color: white;
  padding: 12px 16px; border-radius: 12px; font-size: 14px;
  box-shadow: var(--shadow-lg);
  max-width: 360px;
}
.toast.success { background: #0fb37b; }
.toast.error { background: var(--color-danger); }
.toast.warning { background: #b76500; }

/* ---------- Progress ---------- */
.progress {
  height: 8px; background: var(--color-surface-muted); border-radius: 999px; overflow: hidden;
}
.progress > span {
  display: block; height: 100%; background: var(--color-primary);
  transition: width 0.3s ease;
}

/* ---------- Checklist ---------- */
.checklist label {
  display: flex; align-items: center; gap: 10px; font-weight: 500;
  padding: 10px 12px; border-radius: 10px; cursor: pointer;
}
.checklist label:hover { background: var(--color-surface-muted); }
.checklist input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--color-primary); }

/* ---------- Empty ---------- */
.empty {
  text-align: center; padding: 40px 16px; color: var(--color-text-tertiary);
}
.empty .emoji { font-size: 36px; margin-bottom: 8px; }

/* ---------- Utility ---------- */
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.muted { color: var(--color-text-tertiary); }
.section-title { font-size: 14px; font-weight: 700; color: var(--color-text-secondary); margin: 24px 0 8px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.pre-wrap { white-space: pre-wrap; word-break: break-word; }
.gap-12 { gap: 12px; }
.gap-8 { gap: 8px; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }

/* ---------- Image gallery / pick ---------- */
.image-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}
.image-pick {
  position: relative;
  border: 2px solid var(--color-divider);
  border-radius: 12px;
  overflow: hidden;
  background: var(--color-surface-muted);
  transition: border-color 0.15s ease, transform 0.05s ease;
  cursor: pointer;
}
.image-pick:hover { border-color: var(--color-primary); }
.image-pick.selected { border-color: var(--color-primary); box-shadow: 0 0 0 4px rgba(49,130,246,0.18); }
.image-pick img { width: 100%; display: block; }
.image-pick .meta {
  padding: 8px 10px;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--color-text-secondary);
}
.image-pick .selected-tag {
  position: absolute; top: 8px; left: 8px;
  background: var(--color-primary); color: white;
  font-size: 11px; font-weight: 800; padding: 4px 8px; border-radius: 999px;
}
.image-pick form { margin: 0; }
.image-pick form button {
  background: transparent; border: 0; padding: 6px 8px;
  color: var(--color-primary); font-weight: 700; cursor: pointer;
}
.image-pick.selected form button { color: var(--color-success); }

/* ---------- Live status panel ---------- */
.live-status {
  margin-top: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--color-primary-soft);
  border: 1px solid #c9deff;
}
.live-status .label {
  font-size: 13px; font-weight: 800; color: var(--color-primary);
  display: flex; align-items: center; gap: 8px;
}
.live-status .label .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--color-primary);
  animation: pulse 1.2s ease-in-out infinite;
}
.live-status.success { background: #d6f6ec; border-color: #a5e8d0; }
.live-status.success .label, .live-status.success .label .dot { color: #00875c; background: #00875c; }
.live-status.error { background: var(--color-danger-soft); border-color: #ffb7be; }
.live-status.error .label, .live-status.error .label .dot { color: var(--color-danger); background: var(--color-danger); }
.live-status .msg { font-size: 13px; color: var(--color-text-secondary); margin-top: 6px; }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.85); }
}

/* ---------- Bottom nav (mobile) ---------- */
.bottom-nav { display: none; }
@media (max-width: 720px) {
  .navlinks { display: none; }
  .bottom-nav {
    display: flex;
    position: fixed; left: 0; right: 0; bottom: 0;
    background: white; border-top: 1px solid var(--color-divider);
    z-index: 60;
  }
  .bottom-nav a {
    flex: 1; padding: 10px 0; display: flex; flex-direction: column;
    align-items: center; gap: 4px; font-size: 11px; font-weight: 700;
    color: var(--color-text-tertiary);
  }
  .bottom-nav a.active { color: var(--color-primary); }
  .bottom-nav a svg { width: 22px; height: 22px; }
  body { padding-bottom: 64px; }
}