/* ============================================================
   Shared styling for the apps directory and standalone app pages.
   ============================================================ */

body.apps-shell,
body.apps-directory {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: #f1f5f9;
  color: #1e293b;
}

body.dark-mode.apps-shell,
body.dark-mode.apps-directory {
  background: #0f1117;
  color: #e8edf5;
}

/* ── Page wrapper ────────────────────────────────────────── */
.apps-page {
  width: min(1140px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 52px;
}

/* ── Intro banner ────────────────────────────────────────── */
.apps-intro {
  background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
  border: 1px solid #dbe5f5;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(24, 57, 138, 0.09);
  margin: 0 0 20px;
  padding: 28px 28px 24px;
}

.apps-intro h2 {
  margin: 0 0 8px;
  color: #18398a;
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.apps-intro p {
  margin: 0;
  max-width: 760px;
  color: #475569;
  font-size: 15px;
  line-height: 1.65;
}

/* ── Category nav pills ──────────────────────────────────── */
.app-category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.app-category-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 14px;
  border: 1px solid #c8d5ea;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.80);
  color: #18398a;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  transition: background-color 0.18s, border-color 0.18s;
}

.app-category-nav a:hover,
.app-category-nav a.active {
  border-color: #18398a;
  background: #fff;
  text-decoration: none;
  color: #18398a;
}

/* ── Section ─────────────────────────────────────────────── */
.app-section {
  margin: 30px 0 0;
}

.app-section h2 {
  margin: 0 0 14px;
  color: #18398a;
  font-size: 20px;
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 2px solid #e2e8f0;
}

/* ── App grid ────────────────────────────────────────────── */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

/* ── App card ────────────────────────────────────────────── */
.app-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.07);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s, transform 0.2s;
}

.app-card:hover {
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.11);
  transform: translateY(-2px);
}

.app-card img {
  width: 100%;
  display: block;
}

.app-card .app-card-body,
.app-card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.app-card h3 {
  margin: 0;
  color: #18398a;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.app-card p {
  color: #475569;
  font-size: 14px;
  line-height: 1.55;
  margin: 0;
  flex: 1;
}

.app-card a,
.app-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 8px 14px;
  border-radius: 7px;
  background: #18398a;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 13px;
  border: none;
  cursor: pointer;
  transition: background-color 0.18s;
  margin-top: auto;
}

.app-card a:hover,
.app-btn:hover {
  background: #0e2a6d;
  text-decoration: none;
  color: #fff !important;
}

/* ── Dark mode ───────────────────────────────────────────── */
body.dark-mode .apps-intro {
  background: linear-gradient(135deg, #161e30 0%, #111827 100%);
  border-color: #2b3650;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.26);
}

body.dark-mode .apps-intro h2,
body.dark-mode .app-section h2,
body.dark-mode .app-card h3 {
  color: #93c5fd;
}

body.dark-mode .apps-intro p,
body.dark-mode .app-card p {
  color: #94a3b8;
}

body.dark-mode .app-section h2 {
  border-bottom-color: #2b3650;
}

body.dark-mode .app-category-nav a {
  background: #1a1f2e;
  border-color: #2b3650;
  color: #93c5fd;
}

body.dark-mode .app-category-nav a:hover,
body.dark-mode .app-category-nav a.active {
  background: #1e2d4a;
  border-color: #60a5fa;
}

body.dark-mode .app-card {
  background: #1a1f2e;
  border-color: #2b3650;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.24);
}

body.dark-mode .app-card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.34);
}

body.dark-mode .app-card a,
body.dark-mode .app-btn {
  background: #2548b0;
}

body.dark-mode .app-card a:hover,
body.dark-mode .app-btn:hover {
  background: #1e3a8a;
  color: #fff !important;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 700px) {
  .apps-page {
    width: calc(100% - 24px);
    padding-top: 20px;
  }

  .apps-intro {
    padding: 20px 18px;
  }

  .apps-intro h2 {
    font-size: 22px;
  }

  .app-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Professional app-shell polish for standalone tools.
   This intentionally stays presentation-only: no behavior hooks.
   ============================================================ */

body.apps-shell {
  --header: #102a6b;
  --bg: #eef3f9;
  --ink: #182234;
  --muted: #647084;
  --line: #d9e2ef;
  --panel: rgba(255, 255, 255, 0.96);
  --accent: #1d4ed8;
  --accent-2: #0f766e;
  --soft-accent: rgba(29, 78, 216, 0.10);
  --soft-teal: rgba(15, 118, 110, 0.10);
  --danger: #dc2626;
  --ok: #16a34a;
  --radius: 10px;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(29, 78, 216, 0.14), transparent 34rem),
    radial-gradient(circle at right 16rem, rgba(15, 118, 110, 0.12), transparent 30rem),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 42%, #e9eef6 100%);
  color: var(--ink);
}

body.dark-mode.apps-shell {
  --header: #0c1220;
  --bg: #0e1523;
  --ink: #edf3fb;
  --muted: #98a7bb;
  --line: #26354c;
  --panel: rgba(17, 26, 43, 0.96);
  --accent: #78a8ff;
  --accent-2: #5eead4;
  --soft-accent: rgba(120, 168, 255, 0.13);
  --soft-teal: rgba(94, 234, 212, 0.10);
  --danger: #fb7185;
  --ok: #4ade80;
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.16), transparent 34rem),
    radial-gradient(circle at right 15rem, rgba(20, 184, 166, 0.10), transparent 30rem),
    linear-gradient(180deg, #101827 0%, var(--bg) 52%, #0b111d 100%);
}

body.apps-shell header.site-header {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 38%),
    linear-gradient(90deg, var(--header), #173b91 58%, #0f766e);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.22);
  backdrop-filter: blur(14px);
}

body.dark-mode.apps-shell header.site-header {
  background:
    linear-gradient(135deg, rgba(120, 168, 255, 0.12), transparent 42%),
    linear-gradient(90deg, #070b13, #101b33 58%, #0f3f43);
  border-bottom-color: rgba(148, 163, 184, 0.16);
}

body.apps-shell .menu-btn {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  border-radius: 8px;
  transition: background-color 0.18s, transform 0.18s;
}

body.apps-shell .menu-btn:hover {
  background: rgba(255, 255, 255, 0.13);
  transform: translateY(-1px);
}

body.apps-shell .center-logo a:first-child {
  gap: 10px;
  padding: 4px 8px;
  border-radius: 10px;
}

body.apps-shell .center-logo img {
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.20);
}

body.apps-shell .center-logo h1 {
  font-weight: 800;
  letter-spacing: 0;
}

body.apps-shell .back-btn-header {
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, 0.94);
  color: #102a6b;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.16);
}

body.apps-shell .back-btn-header:hover {
  background: #ffffff;
  transform: translateY(-1px);
}

body.apps-shell .slider {
  background: rgba(255, 255, 255, 0.30);
  border: 1px solid rgba(255, 255, 255, 0.26);
}

body.apps-shell .slider:before {
  content: "🌙";
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.20);
}

body.apps-shell .switch input:checked ~ .slider {
  background: rgba(120, 168, 255, 0.42);
}

body.apps-shell .switch input:checked ~ .slider:before {
  content: "☀️";
}

body.apps-shell nav#dropdownMenu {
  background: rgba(16, 42, 107, 0.97);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  box-shadow: 0 22px 50px rgba(15, 23, 42, 0.28);
  backdrop-filter: blur(16px);
}

body.apps-shell .submenu {
  background: rgba(14, 42, 109, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

body.apps-shell .wrap {
  width: min(1480px, calc(100% - 28px));
  padding: 26px 0 40px;
}

body.apps-shell .panel {
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: 0 16px 40px rgba(30, 41, 59, 0.08);
}

body.dark-mode.apps-shell .panel {
  border-color: rgba(148, 163, 184, 0.20);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.30);
}

body.apps-shell .wrap > .panel:first-child {
  position: relative;
  overflow: hidden;
  border-color: rgba(29, 78, 216, 0.20);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(243, 247, 252, 0.94)),
    var(--panel);
}

body.dark-mode.apps-shell .wrap > .panel:first-child {
  background:
    linear-gradient(135deg, rgba(18, 29, 49, 0.98), rgba(14, 21, 35, 0.94)),
    var(--panel);
}

body.apps-shell .wrap > .panel:first-child::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, #1d4ed8, #0f766e, #7c3aed);
}

body.apps-shell .card-head h2,
body.apps-shell .panel h2 {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0;
}

body.apps-shell .muted,
body.apps-shell .preview-note,
body.apps-shell .preview-status {
  color: var(--muted);
}

body.apps-shell .badge {
  border-color: rgba(29, 78, 216, 0.24);
  background: linear-gradient(135deg, var(--soft-accent), rgba(255, 255, 255, 0.64));
  color: #163b89;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

body.dark-mode.apps-shell .badge {
  background: rgba(120, 168, 255, 0.14);
  color: #cfe0ff;
  box-shadow: none;
}

body.apps-shell input:not([type="checkbox"]),
body.apps-shell select,
body.apps-shell textarea {
  border-color: rgba(148, 163, 184, 0.38);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: border-color 0.16s, box-shadow 0.16s, background-color 0.16s;
}

body.dark-mode.apps-shell input:not([type="checkbox"]),
body.dark-mode.apps-shell select,
body.dark-mode.apps-shell textarea {
  background: rgba(10, 17, 30, 0.78);
  border-color: rgba(148, 163, 184, 0.24);
}

body.apps-shell input:not([type="checkbox"]):focus,
body.apps-shell select:focus,
body.apps-shell textarea:focus {
  border-color: var(--accent);
  background: var(--panel);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

body.apps-shell .btn {
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
  border-radius: 9px;
  background: linear-gradient(135deg, #1d4ed8, #245fc8);
  color: #ffffff;
  box-shadow: 0 8px 16px rgba(29, 78, 216, 0.20);
  transition: transform 0.16s, box-shadow 0.16s, filter 0.16s, background-color 0.16s;
}

body.apps-shell .btn:hover:not(:disabled) {
  filter: brightness(1.04);
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(29, 78, 216, 0.24);
}

body.apps-shell .btn.ghost {
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  border-color: rgba(148, 163, 184, 0.44);
  box-shadow: none;
}

body.dark-mode.apps-shell .btn.ghost {
  background: rgba(15, 23, 42, 0.72);
}

body.apps-shell .btn.ok {
  background: linear-gradient(135deg, #16a34a, #0f766e);
  color: #ffffff;
  border-color: rgba(15, 118, 110, 0.32);
}

body.apps-shell .btn.danger {
  background: rgba(220, 38, 38, 0.08);
  color: var(--danger);
  border-color: rgba(220, 38, 38, 0.26);
  box-shadow: none;
}

body.apps-shell .tutorial-card {
  border-radius: 12px;
  border-color: rgba(29, 78, 216, 0.20);
  background:
    linear-gradient(135deg, rgba(29, 78, 216, 0.10), rgba(15, 118, 110, 0.08)),
    var(--panel);
  box-shadow: 0 18px 42px rgba(30, 41, 59, 0.12);
}

body.apps-shell .tutorial-thumb {
  border-radius: 10px;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.16);
}

body.apps-shell .tutorial-kicker {
  color: var(--accent-2);
}

body.apps-shell .tutorial-cta {
  border-radius: 9px;
  background: linear-gradient(135deg, #0f766e, #1d4ed8);
}

body.apps-shell .app {
  gap: 20px;
}

body.apps-shell .left-card,
body.apps-shell .right-card {
  backdrop-filter: blur(12px);
}

body.apps-shell .right-card {
  border-color: rgba(15, 118, 110, 0.22);
}

body.apps-shell #navDock {
  border-color: rgba(148, 163, 184, 0.28);
  background:
    linear-gradient(180deg, rgba(29, 78, 216, 0.04), transparent 42%),
    color-mix(in srgb, var(--panel) 94%, var(--bg));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

body.dark-mode.apps-shell #navDock {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

body.apps-shell #navDock .nav-mini-label {
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

body.apps-shell .section-card,
body.apps-shell .subq,
body.apps-shell .choice-box,
body.apps-shell .vars-section,
body.apps-shell .preview-pane,
body.apps-shell .preview-frame:not(.muted),
body.apps-shell .thumb {
  border-color: rgba(148, 163, 184, 0.28);
  background: color-mix(in srgb, var(--panel) 90%, var(--bg));
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.05);
}

body.dark-mode.apps-shell .section-card,
body.dark-mode.apps-shell .subq,
body.dark-mode.apps-shell .choice-box,
body.dark-mode.apps-shell .vars-section,
body.dark-mode.apps-shell .preview-pane,
body.dark-mode.apps-shell .preview-frame:not(.muted),
body.dark-mode.apps-shell .thumb {
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.20);
}

body.apps-shell .section-card.active {
  border-color: color-mix(in srgb, var(--accent) 62%, var(--line));
  background:
    linear-gradient(135deg, var(--soft-accent), transparent),
    color-mix(in srgb, var(--panel) 94%, var(--bg));
}

body.apps-shell .pill,
body.apps-shell .set-badge,
body.apps-shell .angle-mode-toggle {
  border-color: rgba(148, 163, 184, 0.34);
  background: rgba(255, 255, 255, 0.64);
}

body.dark-mode.apps-shell .pill,
body.dark-mode.apps-shell .set-badge,
body.dark-mode.apps-shell .angle-mode-toggle {
  background: rgba(15, 23, 42, 0.58);
}

body.apps-shell .seg {
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
}

body.dark-mode.apps-shell .seg {
  background: rgba(15, 23, 42, 0.58);
}

body.apps-shell .seg.active,
body.apps-shell .angle-mode-btn.active {
  background: linear-gradient(135deg, var(--accent), #0f766e);
  border-color: transparent;
  color: #ffffff;
}

body.apps-shell .image-drop {
  border-radius: 10px;
  border-color: color-mix(in srgb, var(--accent-2) 36%, var(--line));
  background:
    linear-gradient(135deg, var(--soft-teal), transparent),
    color-mix(in srgb, var(--panel) 88%, var(--bg));
}

body.apps-shell .image-drop.active {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-2) 18%, transparent);
}

body.apps-shell .formulaEditorWrap,
body.apps-shell .derivedFormulaPopupBox {
  border-color: rgba(124, 58, 237, 0.28);
  border-radius: 10px;
  box-shadow: 0 10px 24px rgba(124, 58, 237, 0.08);
}

body.apps-shell .formulaToolbar,
body.apps-shell .formulaTemplateStrip,
body.apps-shell .formulaPreviewStrip,
body.apps-shell .formulaHint,
body.apps-shell .formulaEvalStrip {
  background:
    linear-gradient(135deg, rgba(124, 58, 237, 0.08), transparent),
    color-mix(in srgb, var(--panel) 92%, var(--bg));
}

body.apps-shell .fBtn,
body.apps-shell .entityBadge,
body.apps-shell .varBadge {
  border-radius: 8px;
}

body.apps-shell .paper {
  border-radius: 10px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.10);
}

body.apps-shell .inputPopup,
body.apps-shell .formulaModal,
body.apps-shell .imagePreviewDialog,
body.apps-shell .confirmDialog {
  border-radius: 12px;
  border-color: rgba(148, 163, 184, 0.32);
  box-shadow: 0 28px 72px rgba(15, 23, 42, 0.34);
}

body.apps-shell .inputPopupBackdrop,
body.apps-shell .formulaModalBackdrop,
body.apps-shell .imagePreviewBackdrop {
  backdrop-filter: blur(8px);
}

body.apps-shell .right-reopen-tab {
  background: linear-gradient(180deg, #1d4ed8, #0f766e);
  box-shadow: -8px 12px 28px rgba(15, 23, 42, 0.22);
}

body.apps-shell ::selection {
  background: color-mix(in srgb, var(--accent) 26%, transparent);
}

@media (max-width: 760px) {
  body.apps-shell .wrap {
    width: calc(100% - 18px);
    padding-top: 18px;
  }

  body.apps-shell .panel {
    padding: 12px;
  }

  body.apps-shell .tutorial-card {
    padding: 10px;
  }
}