/* ==========================================================================
   Lumipage — glass UI, aurora background, animations, responsive layout
   ========================================================================== */

:root {
  --accent-1: #6366f1;
  --accent-2: #06b6d4;
  --accent-3: #a855f7;
  --accent-4: #22c55e;
  --danger: #f43f5e;
  --warn: #f59e0b;

  --bg: #07070f;
  --text: #eef0ff;
  --muted: #9aa3c7;
  --glass: rgba(255, 255, 255, 0.07);
  --glass-strong: rgba(18, 20, 38, 0.72);
  --glass-border: rgba(255, 255, 255, 0.13);
  --glass-hover: rgba(255, 255, 255, 0.12);
  --field: rgba(255, 255, 255, 0.06);
  --shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.6);
  --radius: 20px;
  --radius-sm: 12px;
  --blob-opacity: 0.55;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #eef1fb;
  --text: #171a33;
  --muted: #5b6285;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-strong: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(255, 255, 255, 0.9);
  --glass-hover: rgba(255, 255, 255, 0.85);
  --field: rgba(255, 255, 255, 0.7);
  --shadow: 0 18px 50px -24px rgba(60, 60, 140, 0.35);
  --blob-opacity: 0.35;
  color-scheme: light;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  transition: background-color .5s var(--ease), color .5s var(--ease);
}

img, svg, canvas { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(1.35rem, 2.6vw, 1.8rem); letter-spacing: -0.02em; }
h2 { font-size: 1.1rem; letter-spacing: -0.01em; }
h3 { font-size: 1rem; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 8px; }

.sr-only { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.grow { flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }
.hidden { display: none !important; }

/* ---------- Aurora background (pure CSS, GPU-friendly) ---------- */
.aurora {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden;
  contain: strict;
}
.aurora span {
  position: absolute; width: 56vmax; height: 56vmax; border-radius: 50%;
  filter: blur(70px); opacity: var(--blob-opacity);
  will-change: transform;
  animation: drift 26s var(--ease) infinite alternate;
}
.aurora span:nth-child(1) { background: radial-gradient(circle, var(--accent-1), transparent 65%); top: -18vmax; left: -14vmax; }
.aurora span:nth-child(2) { background: radial-gradient(circle, var(--accent-2), transparent 65%); bottom: -20vmax; right: -16vmax; animation-duration: 32s; animation-delay: -6s; }
.aurora span:nth-child(3) { background: radial-gradient(circle, var(--accent-3), transparent 65%); top: 30%; left: 40%; width: 40vmax; height: 40vmax; animation-duration: 38s; animation-delay: -12s; }
.grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .05;
  background-image: radial-gradient(rgba(255,255,255,.9) 1px, transparent 1px);
  background-size: 3px 3px;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(6vw, 4vh, 0) scale(1.12); }
}

/* ---------- Glass primitives ---------- */
.glass, .glass-strong {
  background: var(--glass);
  -webkit-backdrop-filter: blur(20px) saturate(170%);
  backdrop-filter: blur(20px) saturate(170%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}
.glass-strong {
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  backdrop-filter: blur(28px) saturate(180%);
}
.glass-chip {
  background: var(--field);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.gradient-text {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-3), var(--accent-1));
  background-size: 300% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 8s linear infinite;
}
@keyframes shimmer { to { background-position: 300% 0; } }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  margin: 12px auto 0; width: min(1200px, calc(100% - 24px));
  padding: 10px 14px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  border-radius: 18px;
  animation: slideDown .7s var(--ease) both;
}
@keyframes slideDown { from { opacity: 0; transform: translateY(-14px); } to { opacity: 1; transform: none; } }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; font-size: 1.12rem; letter-spacing: -0.02em; }
.brand img { width: 38px; height: 38px; border-radius: 11px; box-shadow: 0 8px 24px -8px rgba(99, 102, 241, .8); transition: transform .6s var(--ease); }
.brand:hover img { transform: rotate(-8deg) scale(1.06); }
.brand small { display: block; font-weight: 500; font-size: .7rem; color: var(--muted); letter-spacing: .04em; margin-top: -3px; }
.nav-search { flex: 1 1 260px; max-width: 460px; margin-left: auto; position: relative; }
.nav-search input { width: 100%; }
.nav-actions { display: flex; gap: 8px; align-items: center; }

/* ---------- Form controls ---------- */
.input, .select, .textarea {
  width: 100%;
  font: inherit; color: var(--text);
  background: var(--field);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 11px 14px;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.textarea { min-height: 150px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92rem; }
.input:focus, .select:focus, .textarea:focus {
  outline: none; border-color: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(6, 182, 212, .2);
}
.select option { background: #14162b; color: #eef0ff; }
[data-theme="light"] .select option { background: #fff; color: #171a33; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > span { font-size: .85rem; color: var(--muted); font-weight: 600; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row > * { min-width: 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 4px; }
input[type="range"] { width: 100%; accent-color: var(--accent-2); }
input[type="color"] { width: 54px; height: 44px; padding: 3px; border-radius: 12px; border: 1px solid var(--glass-border); background: var(--field); cursor: pointer; }
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent-2); }
.check { display: inline-flex; gap: 8px; align-items: center; cursor: pointer; font-size: .95rem; }

/* ---------- Buttons ---------- */
.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 650; font-size: .95rem; line-height: 1;
  padding: 12px 18px; min-height: 44px;
  border-radius: 999px; border: 1px solid var(--glass-border);
  background: var(--glass-hover); color: var(--text);
  text-decoration: none; cursor: pointer; user-select: none;
  transition: transform .2s var(--ease), box-shadow .3s, background .3s, opacity .2s;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 12px 28px -12px rgba(99, 102, 241, .6); }
.btn:active:not(:disabled) { transform: translateY(0) scale(.98); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary {
  color: #fff; border: 0;
  background: linear-gradient(120deg, var(--accent-1), var(--accent-3), var(--accent-2));
  background-size: 200% 100%;
  box-shadow: 0 10px 30px -10px rgba(99, 102, 241, .85);
}
.btn.primary:hover:not(:disabled) { background-position: 100% 0; }
.btn.ghost { background: transparent; }
.btn.danger { color: #ffd6de; border-color: rgba(244, 63, 94, .45); background: rgba(244, 63, 94, .15); }
.btn.small { min-height: 34px; padding: 8px 12px; font-size: .85rem; }
.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px; flex: 0 0 36px;
  border-radius: 10px; border: 1px solid var(--glass-border); background: var(--field);
  color: var(--text); font: inherit; cursor: pointer; transition: transform .2s, background .2s;
}
.icon-btn:hover:not(:disabled) { background: var(--glass-hover); transform: scale(1.08); }
.icon-btn:disabled { opacity: .35; cursor: default; }
.icon-btn.danger:hover { color: var(--danger); }
.ripple {
  position: absolute; border-radius: 50%; transform: scale(0); background: rgba(255, 255, 255, .45);
  animation: ripple .65s var(--ease) forwards; pointer-events: none;
}
@keyframes ripple { to { transform: scale(4); opacity: 0; } }

/* ---------- Hero ---------- */
.wrap { width: min(1200px, calc(100% - 24px)); margin: 0 auto; }
.hero { text-align: center; padding: clamp(44px, 9vw, 100px) 0 34px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px;
  font-size: .82rem; font-weight: 600; color: var(--muted);
  background: var(--glass); border: 1px solid var(--glass-border);
  animation: fadeUp .8s var(--ease) both;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-4); box-shadow: 0 0 0 0 rgba(34, 197, 94, .7); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); } 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); } }
.hero h1 {
  font-size: clamp(2.1rem, 6.4vw, 4.4rem); font-weight: 850; line-height: 1.04;
  margin: 18px auto 16px; max-width: 16ch; letter-spacing: -0.035em;
  animation: fadeUp .9s .1s var(--ease) both;
}
.hero p.lead {
  max-width: 60ch; margin: 0 auto; color: var(--muted); font-size: clamp(1rem, 2vw, 1.12rem);
  animation: fadeUp .9s .2s var(--ease) both;
}
.stats { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 26px; animation: fadeUp .9s .3s var(--ease) both; }
.stat { padding: 10px 16px; border-radius: 16px; font-size: .9rem; display: inline-flex; gap: 8px; align-items: center; }
.stat b { font-size: 1.1rem; }
.hero-cta { margin-top: 26px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; animation: fadeUp .9s .35s var(--ease) both; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }

/* ---------- Section + chips ---------- */
.section { margin-top: 34px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.chips { display: flex; gap: 8px; overflow-x: auto; padding: 4px 2px 10px; scrollbar-width: none; scroll-snap-type: x proximity; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto; scroll-snap-align: start; cursor: pointer;
  padding: 9px 15px; border-radius: 999px; font: inherit; font-size: .88rem; font-weight: 600;
  color: var(--muted); background: var(--field); border: 1px solid var(--glass-border);
  transition: all .3s var(--ease);
}
.chip:hover { color: var(--text); transform: translateY(-2px); }
.chip[aria-pressed="true"] {
  color: #fff; border-color: transparent;
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 8px 22px -10px rgba(99, 102, 241, .9);
}
.chip .count { opacity: .7; margin-left: 4px; font-weight: 500; }

/* ---------- Tool cards ---------- */
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
}
.card {
  position: relative; padding: 18px; min-height: 168px;
  display: flex; flex-direction: column; gap: 10px;
  overflow: hidden; isolation: isolate;
  transition: transform .45s var(--ease), box-shadow .45s, border-color .45s;
  animation: fadeUp .6s var(--ease) both; animation-delay: calc(var(--i, 0) * 28ms);
  will-change: transform;
}
.card::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .4s;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), rgba(99, 102, 241, .28), transparent 60%);
}
.card:hover { transform: translateY(-5px); border-color: rgba(99, 102, 241, .45); box-shadow: 0 24px 50px -22px rgba(99, 102, 241, .55); }
.card:hover::before { opacity: 1; }
.card-link { position: absolute; inset: 0; z-index: 1; border-radius: inherit; }
.card-link:focus-visible { outline-offset: -3px; }
.card .tool-ico { position: relative; z-index: 0; pointer-events: none; }
.card-title { font-weight: 700; font-size: 1.02rem; pointer-events: none; }
.card-desc { color: var(--muted); font-size: .88rem; line-height: 1.45; pointer-events: none; }
.card-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 8px; pointer-events: none; }
.card-fav { position: absolute; top: 12px; right: 12px; z-index: 2; }
.card-fav:hover { transform: scale(1.1); }
.badge {
  font-size: .72rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 4px 9px; border-radius: 999px; background: var(--field); color: var(--muted); border: 1px solid var(--glass-border);
}
.empty { text-align: center; padding: 40px 10px; color: var(--muted); }

/* Category colours (icon tile) */
.tool-ico {
  width: 46px; height: 46px; flex: 0 0 46px; border-radius: 14px; display: grid; place-items: center;
  font-size: 1.35rem; color: #fff;
  background: linear-gradient(135deg, var(--c1, #6366f1), var(--c2, #06b6d4));
  box-shadow: 0 10px 22px -10px var(--c1, #6366f1);
  transition: transform .6s var(--ease);
}
.card:hover .tool-ico { transform: rotate(-6deg) scale(1.08); }
.cat-pdf   { --c1: #f43f5e; --c2: #f97316; }
.cat-image { --c1: #a855f7; --c2: #ec4899; }
.cat-text  { --c1: #0ea5e9; --c2: #2563eb; }
.cat-study { --c1: #22c55e; --c2: #14b8a6; }
.cat-tools { --c1: #f59e0b; --c2: #eab308; }

/* ---------- Tool view ---------- */
#view { padding: 14px 0 60px; }
.tool-head {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 14px 16px; margin-bottom: 14px; animation: fadeUp .5s var(--ease) both;
}
.tool-head .tool-title { display: flex; gap: 14px; align-items: center; flex: 1 1 280px; min-width: 0; }
.tool-head p { font-size: .9rem; }
.tool-body { padding: clamp(16px, 3vw, 28px); animation: fadeUp .6s .05s var(--ease) both; }
.tool-body > * + * { margin-top: 16px; }
.tool-body h2 { margin-bottom: 4px; }
.tool-note { font-size: .88rem; color: var(--muted); padding: 12px 14px; border-radius: 14px; background: var(--field); border: 1px dashed var(--glass-border); }
.result-box {
  margin-top: 14px; padding: 16px; border-radius: 16px; background: var(--field);
  border: 1px solid var(--glass-border); animation: fadeUp .45s var(--ease) both;
}
.kv { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; font-size: .95rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.big-num { font-size: clamp(2rem, 6vw, 3rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; }
.error { color: #ff9fb0; }

/* ---------- Dropzone ---------- */
.dropzone {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  padding: 28px 16px; text-align: center; cursor: pointer; border-radius: 18px;
  border: 2px dashed rgba(99, 102, 241, .45); background: var(--field);
  transition: border-color .3s, background .3s, transform .3s var(--ease);
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent-2); background: var(--glass-hover); }
.dropzone.over { border-color: var(--accent-2); transform: scale(1.015); background: rgba(6, 182, 212, .12); }
.dz-icon { font-size: 2rem; animation: bob 2.6s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-6px); } }

/* ---------- Lists / file queue ---------- */
.file-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.file-row { display: flex; align-items: center; gap: 8px; padding: 8px 10px; animation: fadeUp .35s var(--ease) both; }
.file-row .idx { width: 26px; height: 26px; flex: 0 0 26px; border-radius: 8px; display: grid; place-items: center; font-size: .78rem; font-weight: 700; background: var(--glass-hover); }
.item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 14px; background: var(--field); border: 1px solid var(--glass-border); animation: fadeUp .35s var(--ease) both; }
.item.done { opacity: .6; }
.item .text { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.item.done .text { text-decoration: line-through; }

/* ---------- Progress ---------- */
.progress { display: flex; flex-direction: column; gap: 6px; }
.progress .bar { height: 10px; border-radius: 999px; background: var(--field); overflow: hidden; border: 1px solid var(--glass-border); }
.bar-fill {
  height: 100%; width: 0; border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-3));
  background-size: 200% 100%; animation: shimmer 2.5s linear infinite;
  transition: width .35s var(--ease);
}

/* ---------- Thumbnails / gallery ---------- */
.gallery { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
.thumb { border-radius: 14px; overflow: hidden; background: var(--field); border: 1px solid var(--glass-border); display: flex; flex-direction: column; animation: fadeUp .45s var(--ease) both; }
.thumb img { width: 100%; aspect-ratio: 3 / 4; object-fit: contain; background: #fff; }
.thumb .cap { display: flex; justify-content: space-between; align-items: center; gap: 6px; padding: 8px 10px; font-size: .8rem; }
.preview-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.preview-wrap figure { margin: 0; border-radius: 14px; overflow: hidden; background: repeating-conic-gradient(#8883 0 25%, transparent 0 50%) 0 / 18px 18px; border: 1px solid var(--glass-border); }
.preview-wrap img, .preview-wrap canvas { width: 100%; max-height: 62vh; object-fit: contain; }
.preview-wrap figcaption { font-size: .8rem; text-align: center; padding: 6px; color: var(--muted); background: var(--field); }

/* ---------- Swatches / pickers ---------- */
.swatch { height: 92px; border-radius: 18px; border: 1px solid var(--glass-border); box-shadow: inset 0 0 0 1px rgba(255,255,255,.1), 0 14px 30px -18px currentColor; transition: background .35s; }
.palette { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; }
.palette button { all: unset; cursor: pointer; border-radius: 14px; overflow: hidden; border: 1px solid var(--glass-border); transition: transform .25s var(--ease); }
.palette button:hover { transform: translateY(-4px); }
.palette .sw { height: 70px; }
.palette .lbl { padding: 6px 8px; font-size: .78rem; font-family: ui-monospace, Menlo, monospace; background: var(--field); }

/* ---------- Study specific ---------- */
.timer-ring { position: relative; width: min(280px, 70vw); aspect-ratio: 1; margin: 6px auto; }
.timer-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.timer-ring circle { fill: none; stroke-width: 10; }
.timer-ring .track { stroke: var(--field); }
.timer-ring .prog { stroke: url(#ringGrad); stroke-linecap: round; transition: stroke-dashoffset .9s linear; }
.timer-time { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; }
.timer-time b { font-size: clamp(2.4rem, 9vw, 3.4rem); font-variant-numeric: tabular-nums; letter-spacing: -0.03em; }
.mode-pills { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }

.flip-scene { perspective: 1200px; min-height: 230px; cursor: pointer; }
.flip-card { position: relative; width: 100%; min-height: 230px; transform-style: preserve-3d; transition: transform .7s var(--ease); }
.flip-card.flipped { transform: rotateY(180deg); }
.flip-face {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  display: grid; place-items: center; text-align: center; padding: 26px; border-radius: 22px;
  font-size: clamp(1.1rem, 3vw, 1.5rem); font-weight: 650;
  background: linear-gradient(145deg, var(--glass-strong), var(--field));
  border: 1px solid var(--glass-border); box-shadow: var(--shadow);
}
.flip-face.back { transform: rotateY(180deg); background: linear-gradient(145deg, rgba(34,197,94,.22), rgba(20,184,166,.12)); }
.flip-face .tag { position: absolute; top: 12px; left: 14px; font-size: .75rem; color: var(--muted); font-weight: 600; letter-spacing: .05em; text-transform: uppercase; }

.bar-chart { display: flex; align-items: flex-end; gap: 8px; height: 150px; padding: 8px 4px 0; }
.bar-chart > div { flex: 1; border-radius: 10px 10px 4px 4px; background: linear-gradient(180deg, var(--accent-2), var(--accent-1)); min-height: 4px; transition: height .6s var(--ease); position: relative; }
.bar-chart > div span { position: absolute; top: -22px; left: 0; right: 0; text-align: center; font-size: .72rem; font-weight: 700; }

.spinner-wheel { width: 100%; max-width: 320px; aspect-ratio: 1; margin: 0 auto; }
.pick-result { font-size: clamp(1.4rem, 4vw, 2rem); font-weight: 800; text-align: center; min-height: 2.4em; }

/* ---------- Toasts ---------- */
#toasts { position: fixed; z-index: 200; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom)); transform: translateX(-50%); display: flex; flex-direction: column; gap: 10px; width: min(92vw, 420px); pointer-events: none; }
.toast {
  pointer-events: auto; padding: 13px 16px; border-radius: 16px; font-size: .92rem; font-weight: 600;
  background: var(--glass-strong); border: 1px solid var(--glass-border); box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  opacity: 0; transform: translateY(20px) scale(.96); transition: opacity .3s, transform .4s var(--ease);
}
.toast.show { opacity: 1; transform: none; }
.toast.success { border-left: 4px solid var(--accent-4); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.warn { border-left: 4px solid var(--warn); }

/* ---------- Footer ---------- */
.footer { margin-top: 60px; padding: 26px 0 34px; text-align: center; color: var(--muted); font-size: .9rem; }
.footer .glass-chip { display: inline-block; padding: 10px 16px; margin: 4px; }
.footer a { text-decoration: none; border-bottom: 1px dotted currentColor; }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Install banner ---------- */
.install {
  position: fixed; left: 50%; bottom: calc(14px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  z-index: 150; display: flex; gap: 10px; align-items: center; padding: 10px 10px 10px 16px; border-radius: 18px;
  width: min(92vw, 460px); font-size: .9rem; animation: fadeUp .6s var(--ease) both;
}

/* ---------- Scroll-to-top ---------- */
.to-top {
  position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 90;
  width: 48px; height: 48px; border-radius: 50%; font-size: 1.1rem; opacity: 0; pointer-events: none;
  transform: translateY(12px) scale(.8); transition: all .4s var(--ease);
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }

/* ---------- Command palette ---------- */
.palette-overlay {
  position: fixed; inset: 0; z-index: 300; background: rgba(4, 4, 12, .5); display: grid; place-items: start center;
  padding-top: 12vh; -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); animation: fadeIn .25s both;
}
@keyframes fadeIn { from { opacity: 0; } }
.palette-box { width: min(92vw, 560px); padding: 10px; border-radius: 20px; animation: fadeUp .35s var(--ease) both; }
.palette-box .results { max-height: 52vh; overflow: auto; margin-top: 8px; display: flex; flex-direction: column; gap: 4px; }
.palette-box a { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; text-decoration: none; }
.palette-box a:hover, .palette-box a.active { background: var(--glass-hover); }
kbd { font-family: inherit; font-size: .75rem; padding: 2px 7px; border-radius: 7px; border: 1px solid var(--glass-border); background: var(--field); color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .nav-search { order: 3; flex-basis: 100%; max-width: none; margin-left: 0; }
  .nav-actions .hide-sm { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 15px; }
  .wrap { width: calc(100% - 16px); }
  .nav { width: calc(100% - 16px); padding: 9px 10px; border-radius: 16px; }
  .brand small { display: none; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .card { min-height: 150px; padding: 14px; border-radius: 18px; }
  .card-desc { font-size: .8rem; }
  .card .tool-ico { width: 40px; height: 40px; flex-basis: 40px; font-size: 1.15rem; }
  .grid-3, .preview-wrap { grid-template-columns: 1fr; }
  .tool-head { padding: 12px; }
  .tool-head .btn { width: 100%; }
  .btn { min-height: 46px; }
  .hero-cta .btn { flex: 1 1 100%; }
  .install { flex-wrap: wrap; }
  .to-top { width: 44px; height: 44px; }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dt { margin-top: 8px; }
  .palette-overlay { padding-top: 8vh; }
}
@media (hover: none) {
  .card:hover { transform: none; box-shadow: none; }
  .card:hover .tool-ico { transform: none; }
  .card-glow-disabled { display: none; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; scroll-behavior: auto !important;
  }
  .aurora span { animation: none; }
}

@media print {
  .nav, .aurora, .grain, .footer, .to-top, #toasts, .tool-head { display: none !important; }
  body { background: #fff; color: #000; }
}

.warn { color: var(--warn); font-size: .9rem; margin-top: 8px; }

/* ---------- Feature cards (home) ---------- */
.feature-grid { grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); }
.feature { padding: 20px; transition: transform .45s var(--ease), border-color .4s; }
.feature:hover { transform: translateY(-4px); border-color: rgba(6, 182, 212, .4); }
.feature h3 { margin: 10px 0 4px; }
.feature-ico { font-size: 1.6rem; display: inline-grid; place-items: center; width: 52px; height: 52px; border-radius: 16px; background: var(--field); border: 1px solid var(--glass-border); }
.feature.reveal { transition: opacity .8s var(--ease), transform .8s var(--ease), border-color .4s; }
.feature.reveal.in:hover { transform: translateY(-4px); }

/* ---------- Tool header helpers ---------- */
.tool-head .btn.small { min-height: 38px; }
.tool-title { min-width: 0; }

/* ---------- Mobile polish ---------- */
@media (max-width: 560px) {
  .nav .brand img { width: 34px; height: 34px; }
  .nav .brand span { font-size: 1rem; }
  .hero h1 { font-size: clamp(1.9rem, 9vw, 2.4rem); }
  .stats .stat { font-size: .82rem; padding: 8px 12px; }
  .chips { margin-inline: -8px; padding-inline: 8px; }
  .tool-head { flex-direction: row; flex-wrap: wrap; }
  .tool-head > .btn:first-child { flex: 0 0 auto; }
  .tool-head .actions { width: 100%; }
  .tool-head .actions .btn { flex: 1; }
  .install { bottom: calc(74px + env(safe-area-inset-bottom)); }
  .palette-box { border-radius: 18px; }
}

/* ==========================================================================
   Batch 2: settings sheet, compact header, calm & large text, phone tab bar
   ========================================================================== */
.seg { display: flex; gap: 4px; padding: 4px; border-radius: 999px; background: var(--field); border: 1px solid var(--glass-border); }
.seg-btn {
  flex: 1; min-height: 42px; border: 0; border-radius: 999px; cursor: pointer;
  background: transparent; color: var(--muted); font: inherit; font-weight: 650;
  transition: background .3s var(--ease), color .3s;
}
.seg-btn[aria-checked="true"] { color: #fff; background: linear-gradient(120deg, var(--accent-1), var(--accent-2)); box-shadow: 0 8px 20px -10px rgba(99,102,241,.9); }
.set-row { display: flex; align-items: center; gap: 12px; padding: 13px 2px; border-bottom: 1px solid var(--glass-border); cursor: pointer; }
.set-row:last-child { border-bottom: 0; }
.set-row input[type="checkbox"] { width: 22px; height: 22px; flex: 0 0 22px; }
.sheet { width: min(92vw, 520px); max-height: 88vh; overflow: auto; padding: 20px; border-radius: 24px; animation: fadeUp .4s var(--ease) both; }
.sheet h2 { margin: 0; }
.sheet h3 { font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }

.nav { transition: padding .35s var(--ease), background .35s; }
.nav.compact { padding: 6px 12px; border-radius: 0 0 18px 18px; margin-top: 0; }
.nav.compact .brand small { display: none; }
.nav.compact .brand img { width: 30px; height: 30px; border-radius: 9px; }

html.calm .aurora, html.calm .grain { display: none; }
html.calm *, html.calm *::before, html.calm *::after {
  animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important;
}
html.big-text body { font-size: 18px; }
html.big-text .card-desc { font-size: .95rem; }
html.big-text .muted { color: var(--text); opacity: .85; }

/* Bottom tab bar: phones only */
.tabbar { display: none; }

@media (max-width: 640px) {
  body { padding-bottom: 100px; }
  .nav { top: 6px; }
  .nav-actions .icon-btn { width: 40px; height: 40px; }
  .nav-actions #palette-btn { display: none; }

  .tabbar {
    position: fixed; left: 50%; transform: translateX(-50%);
    bottom: calc(10px + env(safe-area-inset-bottom)); z-index: 120;
    width: min(94vw, 460px); display: flex; justify-content: space-around; gap: 4px;
    padding: 6px; border-radius: 22px;
  }
  .tab {
    flex: 1; min-height: 56px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
    padding: 6px 2px; border: 0; border-radius: 16px; background: transparent; color: var(--muted);
    font: inherit; font-size: .68rem; font-weight: 650; text-decoration: none; cursor: pointer;
    transition: background .3s, color .3s, transform .2s;
  }
  .tab span { font-size: 1.2rem; line-height: 1; }
  .tab:active { transform: scale(.94); }
  .tab[aria-current="page"] { color: var(--text); background: linear-gradient(135deg, rgba(99,102,241,.38), rgba(6,182,212,.26)); }

  .to-top { bottom: 98px; right: 14px; }
  #toasts { bottom: 96px; }
  .install { bottom: 96px; }

  /* iOS zooms into inputs smaller than 16px; keep them readable without zoom */
  input, select, textarea { font-size: 16px; }
  .chip { min-height: 42px; padding: 10px 16px; }
  .icon-btn { width: 42px; height: 42px; flex-basis: 42px; }
  .btn.small { min-height: 42px; }
  .seg-btn { min-height: 46px; }
  .set-row { padding: 16px 2px; }
  .tool-body { padding: 16px; border-radius: 18px; }
  .sheet { width: 100%; max-height: 92vh; border-radius: 26px 26px 0 0; position: fixed; bottom: 0; left: 0; right: 0; width: 100vw; max-width: 100vw; }
  .palette-overlay:has(.sheet) { align-items: end; padding: 0; }
  .sheet-overlay { place-items: end center; padding-top: 0; }
  .card { min-height: 140px; }
  .card:active { transform: scale(.98); }
  .palette-box { width: 100%; }
  .grid { gap: 12px; }
}

@media (max-width: 380px) {
  .grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .card { padding: 12px; }
  .card-title { font-size: .92rem; }
  .card-foot { display: none; }
  .brand span { font-size: .95rem; }
}

@media (min-width: 641px) and (max-width: 900px) {
  .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ==========================================================================
   Batch 3: modern polish — gradient card rims, new badges, welcome, tips,
   drop veil, suggestion sheet, accent swatches, confetti, page transitions
   ========================================================================== */

/* Gradient hairline rim that lights up on hover, coloured by category */
.card::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  border-radius: inherit; padding: 1.5px;
  background: linear-gradient(135deg, var(--c1, #6366f1), transparent 45%, var(--c2, #06b6d4));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .5s var(--ease);
}
.card:hover::after, .card:focus-within::after { opacity: 1; }
.card { transition: transform .45s var(--ease), box-shadow .45s; }
.card:focus-within { outline: 2px solid var(--accent-2); outline-offset: 2px; }

.new-badge {
  font-size: .66rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 9px; border-radius: 999px; color: #fff;
  background: linear-gradient(120deg, #f43f5e, #f59e0b);
  box-shadow: 0 6px 16px -8px rgba(244, 63, 94, .9);
  animation: pulseSoft 2.8s ease-in-out infinite;
}
@keyframes pulseSoft { 50% { box-shadow: 0 6px 22px -4px rgba(244, 63, 94, .95); } }

/* Welcome + tip */
.welcome { display: flex; align-items: center; gap: 14px; padding: 16px 18px; margin: 18px 0 0; flex-wrap: wrap; }
.welcome p { margin-top: 2px; }
.welcome-ico { font-size: 1.7rem; width: 48px; height: 48px; flex: 0 0 48px; display: grid; place-items: center; border-radius: 16px; background: var(--field); border: 1px solid var(--glass-border); animation: bob 2.6s ease-in-out infinite; }
.tip { display: flex; align-items: center; gap: 12px; margin: 16px auto 0; max-width: 640px; padding: 10px 10px 10px 14px; border-radius: 18px; }
.tip-ico { font-size: 1.1rem; }
.tip-text { flex: 1; font-size: .92rem; color: var(--muted); min-height: 2.6em; display: flex; align-items: center; animation: fadeUp .5s var(--ease) both; }

/* Drop-anywhere veil */
.drop-veil {
  position: fixed; inset: 10px; z-index: 180; border-radius: 28px; pointer-events: none;
  border: 2px dashed var(--accent-2); background: rgba(6, 182, 212, .08);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  display: grid; place-items: center; animation: fadeIn .25s both;
}
.drop-veil.hidden { display: none; }
.drop-veil-inner { text-align: center; font-size: 1.15rem; display: grid; gap: 10px; justify-items: center; }
.drop-big { font-size: 2.6rem; animation: bob 1.6s ease-in-out infinite; }

/* Suggestion sheet */
.sheet-grip { width: 44px; height: 5px; border-radius: 999px; background: var(--glass-border); margin: 0 auto 12px; display: none; }
.suggest-list { display: flex; flex-direction: column; gap: 8px; max-height: 60vh; overflow: auto; }
.suggest {
  display: flex; align-items: center; gap: 12px; width: 100%; text-align: left;
  padding: 12px; border-radius: 16px; border: 1px solid var(--glass-border); background: var(--field);
  color: var(--text); font: inherit; cursor: pointer; transition: transform .25s var(--ease), background .25s;
  animation: fadeUp .4s var(--ease) both;
}
.suggest:hover { transform: translateX(4px); background: var(--glass-hover); }
.suggest .tool-ico { width: 40px; height: 40px; flex: 0 0 40px; font-size: 1.1rem; }
.suggest .grow { display: flex; flex-direction: column; min-width: 0; }
.suggest .chev { font-size: 1.4rem; color: var(--muted); }

/* Accent colour swatches */
.accent-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 4px 0 10px; }
.accent-dot {
  width: 42px; height: 42px; border-radius: 50%; border: 2px solid transparent; cursor: pointer;
  box-shadow: 0 8px 18px -10px rgba(0,0,0,.5); transition: transform .25s var(--ease), border-color .25s;
}
.accent-dot:hover { transform: scale(1.1); }
.accent-dot[aria-checked="true"] { border-color: var(--text); transform: scale(1.12); box-shadow: 0 0 0 4px var(--glass-hover), 0 8px 18px -8px rgba(0,0,0,.5); }

/* Confetti layer */
.confetti { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 400; }

/* Shortcut sheet */
.shortcut-box { width: min(92vw, 460px); padding: 24px; border-radius: 22px; }

/* Smooth page transitions */
::view-transition-old(root), ::view-transition-new(root) { animation-duration: .38s; animation-timing-function: var(--ease); }
::view-transition-old(root) { animation-name: vtOut; }
::view-transition-new(root) { animation-name: vtIn; }
@keyframes vtOut { to { opacity: 0; transform: translateY(-8px) scale(.99); } }
@keyframes vtIn { from { opacity: 0; transform: translateY(12px) scale(.99); } }

/* Mobile polish for the new pieces */
@media (max-width: 640px) {
  .welcome { padding: 14px; }
  .tip { margin-inline: 4px; }
  .tip-text { font-size: .85rem; }
  .sheet-grip { display: block; }
  .suggest { padding: 14px; }
  .accent-dot { width: 46px; height: 46px; }
  .shortcut-box { width: 100%; }
}
@media (hover: none) {
  .card::after { opacity: .35; }
}

/* Phones: one clean header row; search lives in the tab bar */
@media (max-width: 640px) {
  .nav-search { display: none; }
  .nav { flex-wrap: nowrap; }
  .nav .brand { flex: 1; min-width: 0; }
  .palette-box { border-radius: 22px; padding: 12px; }
  .palette-box input { font-size: 16px; padding: 14px 16px; }
  .palette-overlay { place-items: stretch; padding: 10px; }
  .palette-box { width: 100%; align-self: start; margin-top: 4px; }
}