/* ============ IDPhoto4U — warm & playful theme ============ */
:root {
  --bg: #FFF8EE;
  --bg-card: #FFFFFF;
  --bg-inset: #FBEFDD;
  --text: #33254A;
  --text-dim: #71638A;
  --line: #F0E2CC;
  --accent: #FF6B4A;          /* coral */
  --accent-2: #7C5CFF;        /* grape */
  --accent-3: #FFB800;        /* sunshine */
  --accent-4: #17B89B;        /* teal */
  --accent-deep: #E85735;
  --accent-soft: #FFEAE2;
  --btn-bg: #FF6B4A;
  --btn-fg: #FFFFFF;
  --ok: #17B89B;
  --danger: #E5484D;
  --shadow: 0 2px 4px rgba(51, 37, 74, .05), 0 10px 30px rgba(51, 37, 74, .07);
  --radius: 20px;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-head: 'Baloo 2', 'Inter', system-ui, sans-serif;
}
[data-theme="dark"] {
  --bg: #221F30;
  --bg-card: #2C2840;
  --bg-inset: #262138;
  --text: #F6F1FF;
  --text-dim: #A99FC6;
  --line: #3D3658;
  --accent: #FF7A5C;
  --accent-2: #9B82FF;
  --accent-3: #FFC533;
  --accent-4: #2BD4B4;
  --accent-deep: #FF8A6E;
  --accent-soft: #433041;
  --btn-bg: #FF7A5C;
  --btn-fg: #221F30;
  --shadow: 0 2px 4px rgba(0, 0, 0, .3), 0 10px 32px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background .25s, color .25s;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--font-head); line-height: 1.15; font-weight: 600; letter-spacing: -.01em; }
button { font-family: inherit; cursor: pointer; }
canvas { display: block; }
.hidden { display: none !important; }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1200px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-mark { color: var(--accent); display: grid; place-items: center; }
.brand-name { font-family: var(--font-head); font-weight: 700; font-size: 1.3rem; }
.brand-name em { font-style: normal; color: var(--accent); }
.topnav { display: flex; align-items: center; gap: 26px; }
.topnav a { color: var(--text-dim); text-decoration: none; font-weight: 500; font-size: .92rem; }
.topnav a:hover { color: var(--text); }
.icon-btn {
  border: 1px solid var(--line); background: var(--bg-card); color: var(--text);
  width: 36px; height: 36px; border-radius: 999px; display: grid; place-items: center;
}
[data-theme="dark"] .ico-moon { display: none; }
html:not([data-theme="dark"]) .ico-sun { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 84px 20px 60px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(480px 260px at 18% 12%, color-mix(in srgb, var(--accent-3) 14%, transparent), transparent 70%),
    radial-gradient(520px 300px at 84% 16%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent 70%),
    radial-gradient(420px 260px at 50% 96%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%);
}
.hero-inner { max-width: 820px; margin: 0 auto; position: relative; }
.hero-badge {
  display: inline-block; padding: 6px 16px; border-radius: 999px; font-size: .82rem; font-weight: 600;
  color: var(--accent-deep); background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  margin-bottom: 26px;
}
.hero h1 { font-size: clamp(2.3rem, 5.6vw, 3.9rem); font-weight: 600; }
.grad {
  background: linear-gradient(92deg, var(--accent), var(--accent-2) 55%, var(--accent-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 20px auto 30px; max-width: 620px; color: var(--text-dim); font-size: 1.08rem; }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.hero-hint { font-size: .8rem; color: var(--text-dim); }
.hero-stats {
  margin-top: 52px; display: flex; justify-content: center; gap: clamp(18px, 5vw, 60px); flex-wrap: wrap;
}
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats b { font-family: var(--font-head); font-size: 1.7rem; }
.hero-stats div:nth-child(1) b { color: var(--accent); }
.hero-stats div:nth-child(2) b { color: var(--accent-2); }
.hero-stats div:nth-child(3) b { color: var(--accent-4); }
.hero-stats div:nth-child(4) b { color: var(--accent-3); }
.hero-stats span { font-size: .8rem; color: var(--text-dim); }
.floaties { position: absolute; inset: 0; pointer-events: none; }
.floaties span {
  position: absolute; font-size: clamp(1.6rem, 3vw, 2.6rem); opacity: .8;
  animation: floaty 5.5s ease-in-out infinite;
}
.floaties span:nth-child(1) { left: 7%; top: 18%; animation-delay: 0s; }
.floaties span:nth-child(2) { right: 8%; top: 24%; animation-delay: 1.2s; }
.floaties span:nth-child(3) { left: 13%; bottom: 12%; animation-delay: 2.2s; }
.floaties span:nth-child(4) { right: 14%; bottom: 8%; animation-delay: 3.1s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-16px) rotate(5deg); }
}
@media (max-width: 720px) { .floaties { display: none; } }

/* ---------- Buttons ---------- */
.btn {
  border: 1px solid var(--line); border-radius: 999px; padding: 10px 20px;
  font-weight: 600; font-size: .95rem; background: var(--bg-card); color: var(--text);
  transition: transform .12s, background .15s, border-color .15s;
}
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--text) 25%, var(--line)); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(95deg, var(--accent), var(--accent-2)); border: none; color: #fff;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
}
.btn-primary:hover { filter: brightness(1.06); transform: translateY(-2px) scale(1.01); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--bg-inset); }
.btn-lg { padding: 16px 36px; font-size: 1.06rem; }
.btn-sm { padding: 7px 14px; font-size: .85rem; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; }
.linklike { background: none; border: none; color: var(--accent-deep); font-weight: 600; text-decoration: underline; font-size: inherit; }

/* ---------- App / stepper ---------- */
.app { max-width: 1200px; margin: 0 auto; padding: 10px 20px 70px; }
.stepper {
  list-style: none; display: flex; gap: 6px; margin: 8px 0 24px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 999px; padding: 6px;
  box-shadow: var(--shadow);
}
.step-tab {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 9px;
  padding: 11px 6px; border-radius: 999px; color: var(--text-dim); font-weight: 600; font-size: .92rem;
  cursor: pointer; user-select: none; transition: background .15s, color .15s;
}
.step-tab:hover { background: var(--bg-inset); }
.step-tab.active { background: var(--accent-soft); color: var(--accent-deep); }
.step-tab.done .step-num { background: var(--ok); color: #fff; border-color: var(--ok); }
.step-num {
  width: 24px; height: 24px; border-radius: 999px; border: 1.5px solid currentColor;
  display: grid; place-items: center; font-size: .78rem; flex-shrink: 0;
}
.step-tab.locked { opacity: .45; cursor: not-allowed; }
@media (max-width: 640px) { .step-label { display: none; } }

.panel { animation: fadeUp .3s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.panel-head { margin-bottom: 18px; }
.panel-head h2 { font-size: 1.6rem; }
.panel-head p { color: var(--text-dim); margin-top: 4px; }

/* ---------- Dropzone ---------- */
.dropzone {
  border: 1.5px dashed color-mix(in srgb, var(--accent) 55%, var(--line));
  background: var(--bg-card); border-radius: var(--radius);
  padding: clamp(40px, 8vw, 84px) 24px; text-align: center; cursor: pointer;
  transition: border-color .15s, background .15s;
  box-shadow: var(--shadow);
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragover {
  border-color: var(--accent); background: var(--accent-soft); outline: none;
}
.dz-icon { color: var(--accent); margin-bottom: 14px; }
.dropzone h2 { font-size: 1.5rem; margin-bottom: 6px; }
.dropzone p { color: var(--text-dim); }
.dz-fine { font-size: .82rem; margin-top: 10px; }
.tips-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 18px; }
.tip-card {
  display: flex; gap: 12px; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px;
}
.tip-card span { font-size: 1.4rem; }
.tip-card b { font-size: .93rem; }
.tip-card p { font-size: .84rem; color: var(--text-dim); margin-top: 2px; }

/* ---------- Standards grid ---------- */
.std-toolbar { display: flex; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.search-wrap {
  flex: 1; min-width: 240px; display: flex; align-items: center; gap: 9px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 999px; padding: 0 18px;
  color: var(--text-dim);
}
.search-wrap:focus-within { border-color: var(--accent); }
.search-wrap input {
  flex: 1; border: none; background: none; padding: 12px 0; font-size: .95rem; color: var(--text);
  outline: none; font-family: inherit;
}
.std-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 10px;
  max-height: 480px; overflow-y: auto; padding: 2px; border-radius: 8px;
}
.std-card {
  text-align: left; background: var(--bg-card); border: 1.5px solid var(--line); border-radius: 14px;
  padding: 13px 14px; display: flex; gap: 11px; align-items: center;
  transition: border-color .12s, background .12s;
}
.std-card:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); }
.std-card.active { border-color: var(--accent); background: var(--accent-soft); }
.std-flag { font-size: 1.55rem; }
.std-card b { display: block; font-size: .9rem; line-height: 1.25; }
.std-card small { color: var(--text-dim); font-size: .78rem; }
.std-dims { margin-left: auto; font-size: .78rem; font-weight: 700; color: var(--accent-deep); white-space: nowrap; }
.std-empty { color: var(--text-dim); padding: 24px; text-align: center; grid-column: 1/-1; }

.custom-size {
  margin-top: 16px; background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px;
}
.custom-size h3 { margin-bottom: 12px; font-size: 1.1rem; }
.cs-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.cs-row label { display: flex; flex-direction: column; gap: 5px; font-size: .82rem; color: var(--text-dim); font-weight: 600; }
.cs-row input, .cs-row select {
  width: 110px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg-inset); color: var(--text); font-size: .95rem; font-family: inherit;
}
.cs-x { font-weight: 700; padding-bottom: 10px; color: var(--text-dim); }

/* ---------- Editor ---------- */
.editor-layout { display: grid; grid-template-columns: 1fr 320px; gap: 18px; align-items: start; }
@media (max-width: 900px) { .editor-layout { grid-template-columns: 1fr; } }
.editor-canvas-wrap {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow);
}
.editor-meta { font-size: .85rem; font-weight: 600; color: var(--text-dim); margin-bottom: 10px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; }
.editor-meta b { color: var(--text); }
#editorCanvas { width: 100%; border-radius: 10px; touch-action: none; cursor: grab; background: var(--bg-inset); }
#editorCanvas.dragging { cursor: grabbing; }
.editor-help { font-size: .78rem; color: var(--text-dim); text-align: center; margin-top: 10px; }

.editor-side { display: flex; flex-direction: column; gap: 14px; }
.ctrl-group {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px;
}
.ctrl-group h3 { font-size: 1.02rem; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.ai-chip {
  font-size: .62rem; font-weight: 800; letter-spacing: .05em; color: #fff; padding: 2px 8px; border-radius: 999px;
  background: var(--accent); font-family: var(--font-body);
}
.slider-row { display: block; font-size: .82rem; font-weight: 600; color: var(--text-dim); margin-bottom: 10px; }
.slider-row input[type=range] { width: 100%; margin-top: 5px; accent-color: var(--accent); }
.slider-val { float: right; color: var(--text); font-variant-numeric: tabular-nums; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-row .btn { flex: 1; }
#guidesBtn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-deep); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.ctrl-hint { font-size: .78rem; color: var(--text-dim); margin-bottom: 10px; }
.bg-swatches { display: flex; gap: 8px; flex-wrap: wrap; }
.bg-swatch {
  width: 34px; height: 34px; border-radius: 999px; border: 2px solid var(--line);
  display: grid; place-items: center; font-size: .8rem; position: relative; overflow: hidden;
  transition: transform .1s, border-color .1s; background: var(--bg-inset); color: var(--text-dim);
}
.bg-swatch:hover { transform: scale(1.08); }
.bg-swatch.active { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent); }
.bg-custom input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.bg-status { margin-top: 10px; font-size: .8rem; color: var(--text-dim); }
.bg-status.working { color: var(--accent-deep); }
.bg-status.error { color: var(--danger); }
.std-summary { font-size: .84rem; color: var(--text-dim); }
.std-summary b { color: var(--text); }
.std-summary .sum-row { display: flex; justify-content: space-between; gap: 10px; padding: 3px 0; }

/* advanced disclosure */
details.adv { border-top: 1px solid var(--line); margin-top: 12px; padding-top: 10px; }
details.adv summary {
  cursor: pointer; list-style: none; font-size: .84rem; font-weight: 600; color: var(--text-dim);
  display: flex; align-items: center; gap: 6px; user-select: none;
}
details.adv summary::-webkit-details-marker { display: none; }
details.adv summary::before { content: "▸"; font-size: .7rem; transition: transform .15s; }
details.adv[open] summary::before { transform: rotate(90deg); }
details.adv summary:hover { color: var(--text); }
details.adv > *:not(summary) { margin-top: 10px; }

/* ---------- Output ---------- */
.output-layout { display: grid; grid-template-columns: 1fr 320px; gap: 18px; align-items: start; }
@media (max-width: 900px) { .output-layout { grid-template-columns: 1fr; } }
.output-preview-wrap {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow);
}
.preview-tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.ptab {
  padding: 8px 18px; border-radius: 999px; border: 1px solid var(--line); background: transparent;
  color: var(--text-dim); font-weight: 600; font-size: .88rem;
}
.ptab.active { background: var(--accent-soft); color: var(--accent-deep); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.preview-stage {
  display: grid; place-items: center; background: var(--bg-inset); border-radius: 10px; padding: 18px; min-height: 320px;
}
#previewCanvas { max-width: 100%; max-height: 520px; box-shadow: 0 10px 34px rgba(20, 20, 19, .18); border-radius: 3px; background: #fff; }
.preview-meta { font-size: .83rem; color: var(--text-dim); margin-top: 10px; text-align: center; }
.sel-row { display: block; font-size: .82rem; font-weight: 600; color: var(--text-dim); margin-bottom: 10px; }
.sel-row select {
  width: 100%; margin-top: 5px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg-inset); color: var(--text); font-size: .92rem; font-family: inherit;
}
.check-row { display: flex; align-items: center; gap: 9px; font-size: .87rem; margin: 8px 0; color: var(--text); }
.check-row input { accent-color: var(--accent); width: 16px; height: 16px; }
.fit-info { font-size: .84rem; color: var(--text-dim); background: var(--bg-inset); border-radius: 10px; padding: 9px 12px; margin-top: 8px; }
.fit-info b { color: var(--accent-deep); }

/* ---------- Content sections ---------- */
.content-section { max-width: 1000px; margin: 0 auto; padding: 48px 20px; }
.content-section h2 { font-size: 1.8rem; margin-bottom: 22px; }
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.guide-card { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.guide-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.guide-card p { font-size: .88rem; color: var(--text-dim); }
#faq details { background: var(--bg-card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 20px; margin-bottom: 10px; }
#faq summary { font-weight: 600; cursor: pointer; font-size: .95rem; }
#faq details p { margin-top: 10px; color: var(--text-dim); font-size: .9rem; }

.site-footer { border-top: 1px solid var(--line); text-align: center; padding: 32px 20px 46px; color: var(--text-dim); font-size: .88rem; }
.site-footer .fine { font-size: .76rem; margin-top: 6px; opacity: .8; }

/* ---------- Fun extras ---------- */
.flag-img { width: 27px; height: auto; border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,.2); display: inline-block; vertical-align: -3px; }
.std-flag { display: grid; place-items: center; min-width: 30px; }
.confetti-canvas { position: fixed; inset: 0; pointer-events: none; z-index: 300; }
.dropzone:hover .dz-icon { animation: wiggle .6s ease-in-out; }
@keyframes wiggle {
  0%, 100% { transform: rotate(0); }
  25% { transform: rotate(-8deg) scale(1.08); }
  75% { transform: rotate(8deg) scale(1.08); }
}
.tip-card, .guide-card { transition: transform .15s, box-shadow .15s; }
.tip-card:hover, .guide-card:hover { transform: translateY(-3px) rotate(-.4deg); box-shadow: var(--shadow); }
.tip-card { border-top: 3px solid var(--accent-3); }
.tip-card:nth-child(2) { border-top-color: var(--accent-4); }
.tip-card:nth-child(3) { border-top-color: var(--accent-2); }
.std-card:hover { transform: translateY(-2px) rotate(-.3deg); }
.step-emoji { font-size: 1.05rem; }
.hero-badge { animation: badgepop .5s ease .2s backwards; }
@keyframes badgepop { from { transform: scale(.85); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px);
  background: var(--text); color: var(--bg); padding: 11px 22px; border-radius: 999px;
  font-size: .9rem; font-weight: 600; opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s;
  z-index: 100; max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }