/* =============================================================
 * Phattify Design System — tối giản đen-trắng (Notion/Linear style)
 * Đợt 1: Foundation (tokens + primitives + dialogs)
 * ============================================================= */

/* ── Tokens ──────────────────────────────────────────────── */
:root {
  /* Spacing scale (Tailwind-like) */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px; --s-8: 48px;
  /* Radius */
  --r-sm: 6px; --r-md: 8px; --r-lg: 12px; --r-xl: 16px; --r-pill: 999px;
  /* Font sizes */
  --fs-xs: 11px; --fs-sm: 12.5px; --fs-md: 14px; --fs-lg: 16px; --fs-xl: 20px; --fs-2xl: 28px;
  /* Semantic (light) */
  --ok: #16a34a;    --ok-bg: #f0fdf4;   --ok-border: #bbf7d0;
  --warn: #d97706;  --warn-bg: #fffbeb; --warn-border: #fde68a;
  --danger: #dc2626;--danger-bg: #fef2f2; --danger-border: #fecaca;
  --info: #2563eb;  --info-bg: #eff6ff;  --info-border: #bfdbfe;
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.2);
  --surface-hover: #f5f5f5;
  /* Motion */
  --ease: cubic-bezier(.2,.7,.2,1);
  --dur: .15s;
}

/* ── Reset nhẹ ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--r-md); }

/* ── Typography helpers ──────────────────────────────────── */
.text-xs { font-size: var(--fs-xs); } .text-sm { font-size: var(--fs-sm); }
.text-md { font-size: var(--fs-md); } .text-lg { font-size: var(--fs-lg); }
.text-muted { color: var(--muted); }  .text-strong { color: var(--ink-strong); font-weight: 600; }

/* ── Button (primitive) ───────────────────────────────────
 * Variants: primary (mặc định .btn), ghost, danger, subtle
 * Sizes: sm, md (mặc định)
 * Icon-only: .btn.icon-only  · With icon: .btn.ic
 * ────────────────────────────────────────────────────────── */
.btn, button.btn, a.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 36px; padding: 0 18px; font: 600 var(--fs-md)/1 var(--sans, Inter, sans-serif);
  border-radius: var(--r-pill); border: 1px solid transparent; cursor: pointer;
  background: var(--ink-strong); color: var(--bg);
  transition: opacity var(--dur) var(--ease), background var(--dur), transform var(--dur), border-color var(--dur);
  text-decoration: none; white-space: nowrap; user-select: none;
}
.btn:hover { opacity: 0.88; }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: var(--card); color: var(--ink-strong); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--ink-strong); background: var(--surface-hover); opacity: 1; }
.btn.subtle { background: var(--surface); color: var(--ink-strong); }
.btn.subtle:hover { background: var(--surface-hover); opacity: 1; }
.btn.danger { background: var(--danger); color: #fff; }
.btn.ghost.danger { background: var(--card); color: var(--danger); border-color: var(--danger-border); }
.btn.ghost.danger:hover { background: var(--danger-bg); border-color: var(--danger); }
.btn.sm { height: 30px; padding: 0 12px; font-size: var(--fs-sm); gap: 6px; }
.btn.icon-only { width: 36px; padding: 0; }
.btn.icon-only.sm { width: 30px; }
.btn .ico { width: 16px; height: 16px; flex-shrink: 0; }

/* ── Field (input/textarea/select label) ─────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--s-4); }
.field-label { font-size: var(--fs-sm); font-weight: 600; color: var(--ink-strong); }
.field-required::after { content: " *"; color: var(--danger); }
.field-help { font-size: var(--fs-xs); color: var(--muted); }
.field-error { font-size: var(--fs-xs); color: var(--danger); display: none; }
.field.has-error .field-error { display: block; }
.field-input, .field input, .field textarea, .field select {
  width: 100%; height: 40px; padding: 0 14px; font: 400 var(--fs-md)/1.4 var(--sans);
  background: var(--card); color: var(--ink-strong); border: 1px solid var(--line); border-radius: var(--r-md);
  transition: border-color var(--dur), box-shadow var(--dur);
}
.field textarea { height: auto; min-height: 90px; padding: 12px 14px; resize: vertical; line-height: 1.5; }
.field select { padding-right: 34px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat; background-position: right 12px center;
  -webkit-appearance: none; appearance: none;
}
.field input:hover, .field textarea:hover, .field select:hover { border-color: #b8b8b8; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--ink-strong); box-shadow: var(--focus-ring); }
.field.has-error input, .field.has-error textarea, .field.has-error select { border-color: var(--danger); }

/* ── Card ────────────────────────────────────────────────── */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: var(--s-5); }
.card-hover { transition: box-shadow var(--dur), transform var(--dur), border-color var(--dur); cursor: pointer; }
.card-hover:hover { box-shadow: 0 8px 24px rgba(0,0,0,.08); border-color: var(--line); transform: translateY(-1px); }
.card-title { font: 700 var(--fs-lg)/1.3 var(--serif, Lora, serif); margin: 0 0 var(--s-3); display: flex; align-items: center; gap: 8px; }
.card-sub { color: var(--muted); font-size: var(--fs-sm); margin-top: -8px; margin-bottom: var(--s-4); }

/* ── Table ───────────────────────────────────────────────── */
.tbl-wrap { border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: var(--card); }
.tbl { width: 100%; border-collapse: collapse; font-size: var(--fs-md); }
.tbl th { text-align: left; padding: 12px 14px; font-weight: 600; font-size: var(--fs-sm); color: var(--muted); background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 1; text-transform: uppercase; letter-spacing: .3px; }
.tbl td { padding: 12px 14px; border-bottom: 1px solid var(--line-faint); vertical-align: middle; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tbody tr { transition: background var(--dur); }
.tbl tbody tr:hover { background: var(--surface); }
.tbl .row-actions { display: flex; gap: 4px; justify-content: flex-end; opacity: 0; transition: opacity var(--dur); }
.tbl tr:hover .row-actions { opacity: 1; }
.tbl .col-select { width: 42px; padding-right: 0; }
.tbl input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--ink-strong); cursor: pointer; }

/* ── Chip / Badge ────────────────────────────────────────── */
.chip { display: inline-flex; align-items: center; gap: 4px; height: 24px; padding: 0 10px; font-size: var(--fs-xs); font-weight: 600; border-radius: var(--r-pill); background: var(--surface); color: var(--muted); border: 1px solid var(--line-faint); }
.chip.ok { color: var(--ok); background: var(--ok-bg); border-color: var(--ok-border); }
.chip.warn { color: var(--warn); background: var(--warn-bg); border-color: var(--warn-border); }
.chip.danger { color: var(--danger); background: var(--danger-bg); border-color: var(--danger-border); }
.chip.info { color: var(--info); background: var(--info-bg); border-color: var(--info-border); }
.chip.solid { background: var(--ink-strong); color: var(--bg); border-color: var(--ink-strong); }

/* ── States: empty / skeleton / spinner ──────────────────── */
.empty { text-align: center; padding: var(--s-8) var(--s-4); color: var(--muted); }
.empty .ico { width: 40px; height: 40px; opacity: .4; margin-bottom: var(--s-3); }
.empty h3 { font: 600 var(--fs-lg)/1.3 var(--sans); color: var(--ink-strong); margin: 0 0 6px; }
.empty p { font-size: var(--fs-sm); margin: 0 0 var(--s-4); }

.skeleton { background: linear-gradient(90deg, #eee 25%, #f5f5f5 50%, #eee 75%); background-size: 200% 100%; animation: sk 1.5s infinite; border-radius: var(--r-md); }
@keyframes sk { 0% { background-position: 200% 0 } 100% { background-position: -200% 0 } }

.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--line); border-top-color: var(--ink-strong); border-radius: 50%; animation: sp .6s linear infinite; }
@keyframes sp { to { transform: rotate(360deg) } }

.loading-overlay { position: absolute; inset: 0; background: rgba(255,255,255,.7); display: flex; align-items: center; justify-content: center; z-index: 10; backdrop-filter: blur(2px); }

/* ── Modal / Drawer / Toast / Confirm ────────────────────── */
.ui-scrim { position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 900; opacity: 0; transition: opacity var(--dur); backdrop-filter: blur(4px); }
.ui-scrim.open { opacity: 1; }

.ui-modal { position: fixed; z-index: 901; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(.96); opacity: 0;
  background: var(--card); border-radius: var(--r-lg); box-shadow: 0 20px 60px rgba(0,0,0,.24); min-width: 380px; max-width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 40px); display: flex; flex-direction: column; transition: opacity var(--dur), transform var(--dur); }
.ui-modal.open { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.ui-modal-header { padding: var(--s-5) var(--s-5) var(--s-3); display: flex; justify-content: space-between; align-items: flex-start; gap: var(--s-4); }
.ui-modal-title { font: 700 var(--fs-lg)/1.3 var(--serif); margin: 0; }
.ui-modal-close { background: none; border: none; cursor: pointer; padding: 4px; border-radius: var(--r-sm); color: var(--muted); }
.ui-modal-close:hover { background: var(--surface-hover); color: var(--ink-strong); }
.ui-modal-body { padding: 0 var(--s-5); overflow-y: auto; flex: 1; }
.ui-modal-footer { padding: var(--s-4) var(--s-5) var(--s-5); display: flex; justify-content: flex-end; gap: 8px; border-top: 1px solid var(--line-faint); margin-top: var(--s-4); }

.ui-drawer { position: fixed; z-index: 901; top: 0; right: 0; height: 100vh; width: min(520px, 92vw); background: var(--card); box-shadow: -10px 0 40px rgba(0,0,0,.18); transform: translateX(100%); transition: transform var(--dur) var(--ease); display: flex; flex-direction: column; }
.ui-drawer.open { transform: translateX(0); }

.ui-toasts { position: fixed; bottom: 24px; right: 24px; z-index: 999; display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.ui-toast { min-width: 260px; max-width: 400px; background: var(--ink-strong); color: var(--bg); padding: 12px 16px; border-radius: var(--r-md); box-shadow: 0 8px 24px rgba(0,0,0,.2); font-size: var(--fs-md); display: flex; align-items: center; gap: 12px; animation: toast-in .2s var(--ease); }
.ui-toast.ok { background: var(--ok); color: #fff; }
.ui-toast.warn { background: var(--warn); color: #fff; }
.ui-toast.danger { background: var(--danger); color: #fff; }
.ui-toast .undo { background: rgba(255,255,255,.2); color: #fff; border: none; padding: 4px 10px; border-radius: var(--r-sm); font-size: var(--fs-sm); font-weight: 600; cursor: pointer; }
.ui-toast .undo:hover { background: rgba(255,255,255,.3); }
@keyframes toast-in { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.ui-toast.leaving { animation: toast-out .2s var(--ease) forwards; }
@keyframes toast-out { to { transform: translateY(20px); opacity: 0; } }

/* Keyboard shortcut hint */
.kbd { display: inline-block; padding: 2px 6px; font: 600 11px/1 ui-monospace, monospace; background: var(--surface); border: 1px solid var(--line); border-radius: 4px; color: var(--muted); }

/* Search input with icon */
.search-input { position: relative; }
.search-input input { padding-left: 36px !important; }
.search-input .ico { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }

/* File explorer (folder grid) */
.fx-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--s-3); }
.fx-folder { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 18px 12px 14px; background: var(--card); border: 1px solid transparent; border-radius: var(--r-md); cursor: pointer; text-align: center; transition: background var(--dur), border-color var(--dur), transform var(--dur); font: inherit; }
.fx-folder:hover { background: var(--surface-hover); border-color: var(--line); }
.fx-folder:active { transform: scale(.98); }
.fx-folder-name { font-size: 13px; font-weight: 600; color: var(--ink-strong); line-height: 1.3; word-break: break-word; }
.fx-folder-meta { font-size: 11px; color: var(--muted); }

/* Media grid trong folder */
.mx-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: var(--s-3); }
.mx-item { border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: var(--card); cursor: pointer; transition: border-color var(--dur), transform var(--dur); }
.mx-item:hover { border-color: var(--ink-strong); }
.mx-item.selected { border-color: var(--ink-strong); box-shadow: 0 0 0 2px var(--ink-strong); }
.mx-thumb { position: relative; aspect-ratio: 1; background: var(--surface); }
.mx-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.mx-thumb .mx-icon { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; height: 100%; color: var(--muted); font-size: 12px; font-weight: 600; }
/* Huy hiệu media khoá (premium) — góc đối diện với ô chọn để hai thứ không
   đè nhau khi vừa chọn vừa xem trạng thái khoá. */
.mx-thumb .m-lock-badge {
  position: absolute; top: 6px; right: 6px; z-index: 2;
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 999px;
  background: rgba(0,0,0,.68); color: #fff; font-size: 11px;
  pointer-events: none;
}
.mx-item[data-locked="1"] .mx-thumb img { filter: brightness(.62) saturate(.6); }

.mx-thumb .m-sel { position: absolute; top: 6px; left: 6px; width: 18px; height: 18px; cursor: pointer; accent-color: var(--ink-strong); background: var(--card); border-radius: 4px; }
.mx-name { padding: 8px 10px; font-size: 12px; color: var(--ink-strong); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; border-top: 1px solid var(--line-faint); }

/* Utility */
.hstack { display: flex; align-items: center; gap: var(--s-3); }
.vstack { display: flex; flex-direction: column; gap: var(--s-3); }
.gap-2 { gap: var(--s-2); } .gap-4 { gap: var(--s-4); }
.mt-2 { margin-top: var(--s-2); } .mt-4 { margin-top: var(--s-4); } .mt-6 { margin-top: var(--s-6); }
.hidden { display: none !important; }