/* ===== OG Image Generator — Style Sheet ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root {
  --bg: #08080d;
  --s1: #111118;
  --s2: #1a1a24;
  --s3: #22222e;
  --bd: #2a2a3d;
  --bd2: #383850;
  --tx: #eaeaf2;
  --tx2: #8888a4;
  --tx3: #5c5c76;
  --pr: #7c6cf0;
  --pr2: #9d8cf8;
  --ac: #f04770;
  --ok: #22d3a0;
  --warn: #f5a623;
  --r: 12px;
  --r-sm: 8px;
  --f: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
  --transition: .2s cubic-bezier(.4,0,.2,1);
}

[data-theme=light] {
  --bg: #f0f0f5;
  --s1: #ffffff;
  --s2: #f5f5fa;
  --s3: #eaeaef;
  --bd: #d4d4de;
  --bd2: #c0c0cc;
  --tx: #1a1a2e;
  --tx2: #6a6a80;
  --tx3: #9999aa;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
}

html { scroll-behavior: smooth }
body { font-family: var(--f); background: var(--bg); color: var(--tx); line-height: 1.6; min-height: 100vh; -webkit-font-smoothing: antialiased }
a { color: var(--pr); text-decoration: none }
button { cursor: pointer; font-family: var(--f) }
input, select, textarea { font-family: var(--f) }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--bd);
}
.nav-inner { max-width: 1480px; margin: 0 auto; padding: 10px 24px; display: flex; align-items: center; justify-content: space-between }
.logo { font-weight: 800; font-size: 1.1rem; color: var(--tx); letter-spacing: -.02em }
.nav-links { display: flex; gap: 8px; align-items: center }
.nav-btn {
  background: var(--s2); color: var(--tx2); border: 1px solid var(--bd);
  padding: 6px 14px; border-radius: var(--r-sm); font-size: .82rem;
  transition: var(--transition);
}
.nav-btn:hover { color: var(--tx); border-color: var(--bd2); background: var(--s3) }
.donate-trigger { background: linear-gradient(135deg, rgba(240,71,112,.1), rgba(124,108,240,.1)); border-color: rgba(240,71,112,.25); color: var(--ac) }
.donate-trigger:hover { background: linear-gradient(135deg, rgba(240,71,112,.18), rgba(124,108,240,.18)) }

/* ===== Hero ===== */
.hero { text-align: center; padding: 36px 24px 20px; background: radial-gradient(ellipse at 50% 0%, rgba(124,108,240,.08) 0%, transparent 70%) }
.hero h1 {
  font-size: clamp(1.4rem, 3.2vw, 2rem); font-weight: 800; margin-bottom: 8px; letter-spacing: -.03em;
  background: linear-gradient(135deg, var(--pr), var(--ac));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero p { color: var(--tx2); font-size: .92rem; max-width: 580px; margin: 0 auto }
.tabs {
  display: inline-flex; background: var(--s1); border: 1px solid var(--bd);
  border-radius: var(--r); overflow: hidden; margin-top: 18px;
}
.tab-btn {
  padding: 10px 28px; background: transparent; border: none; color: var(--tx2);
  font-size: .85rem; font-weight: 600; transition: var(--transition);
}
.tab-btn.active { background: var(--pr); color: #fff }
.tab-btn:hover:not(.active) { color: var(--tx); background: var(--s2) }

/* ===== App Layout ===== */
.app {
  max-width: 1480px; margin: 0 auto; padding: 20px 24px;
  display: grid; grid-template-columns: 360px 1fr; gap: 24px;
}
@media(max-width: 1024px) { .app { grid-template-columns: 1fr } .preview-panel { order: -1 } }

/* ===== Controls Panel ===== */
.controls-panel {
  display: flex; flex-direction: column; gap: 10px;
  max-height: calc(100vh - 80px); overflow-y: auto;
  scrollbar-width: thin; scrollbar-color: var(--bd) transparent;
  padding-right: 4px;
}
.controls-panel::-webkit-scrollbar { width: 5px }
.controls-panel::-webkit-scrollbar-thumb { background: var(--bd); border-radius: 3px }

.cs {
  background: var(--s1); border: 1px solid var(--bd); border-radius: var(--r);
  overflow: hidden; transition: var(--transition);
}
.cs-title {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; cursor: pointer; user-select: none;
  font-size: .82rem; font-weight: 600; color: var(--tx2);
  transition: var(--transition);
}
.cs-title:hover { color: var(--tx) }
.cs-title small { color: var(--tx3); margin-left: 6px }
.chevron { transition: transform .2s; flex-shrink: 0 }
.cs.collapsed .chevron { transform: rotate(-90deg) }
.cs.collapsed .cs-body { display: none }
.cs-body { padding: 0 16px 14px }
.cs-body label { display: block; font-size: .78rem; color: var(--tx2); margin: 8px 0 3px }

/* ===== Inputs ===== */
.inp {
  width: 100%; background: var(--s2); border: 1px solid var(--bd);
  border-radius: var(--r-sm); padding: 8px 12px; color: var(--tx);
  font-size: .85rem; transition: var(--transition);
}
.inp:focus { outline: none; border-color: var(--pr); box-shadow: 0 0 0 3px rgba(124,108,240,.15) }
.inp-sm { width: 100px }
.inp-file { font-size: .78rem; color: var(--tx2) }
.color-row { display: flex; gap: 8px; align-items: center }
.cpk { width: 40px; height: 36px; border: 1px solid var(--bd); border-radius: var(--r-sm); cursor: pointer; background: none; padding: 2px }
.rng { width: 100%; accent-color: var(--pr); margin-top: 2px }
.format-row { display: flex; gap: 16px; margin-top: 4px }
.radio-label { font-size: .85rem; color: var(--tx); display: flex; align-items: center; gap: 5px; cursor: pointer }
.radio-label input { accent-color: var(--pr) }

/* ===== Buttons ===== */
.btn-primary {
  background: linear-gradient(135deg, var(--pr), #6a5ae0);
  color: #fff; border: none; padding: 10px 20px;
  border-radius: var(--r-sm); font-weight: 600; font-size: .88rem;
  transition: var(--transition); box-shadow: 0 2px 12px rgba(124,108,240,.3);
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); box-shadow: 0 4px 20px rgba(124,108,240,.4) }
.btn-primary:active { transform: translateY(0) }
.btn-outline {
  background: transparent; color: var(--tx); border: 1px solid var(--bd);
  padding: 8px 16px; border-radius: var(--r-sm); font-size: .82rem;
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--pr); color: var(--pr); background: rgba(124,108,240,.06) }
.btn-sm { font-size: .78rem; padding: 5px 10px; border-radius: 6px }
.btn-block { width: 100% }
.export-btns { display: flex; flex-direction: column; gap: 8px; margin-top: 12px }

/* ===== Template Grid ===== */
.template-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px }
.tpl-btn {
  aspect-ratio: 1.9; border-radius: 6px; border: 2px solid var(--bd);
  cursor: pointer; position: relative; overflow: hidden;
  transition: var(--transition);
}
.tpl-btn:hover, .tpl-btn.active { border-color: var(--pr); box-shadow: 0 0 0 1px var(--pr) }
.tpl-btn::after {
  content: attr(data-name); position: absolute; bottom: 0; left: 0; right: 0;
  text-align: center; font-size: 7.5px; font-weight: 600; color: #fff;
  padding: 2px 0; background: linear-gradient(transparent, rgba(0,0,0,.7));
  text-shadow: 0 1px 2px rgba(0,0,0,.8);
}

/* ===== Gradient Grid ===== */
.grad-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px }
.grad-swatch {
  height: 30px; border-radius: 6px; cursor: pointer;
  border: 2px solid transparent; transition: var(--transition);
  position: relative;
}
.grad-swatch:hover { transform: scale(1.08); border-color: rgba(255,255,255,.3) }
.grad-swatch.active { border-color: #fff; box-shadow: 0 0 8px rgba(255,255,255,.2) }
.grad-swatch::after {
  content: attr(title); position: absolute; bottom: -16px; left: 50%; transform: translateX(-50%);
  font-size: 7px; color: var(--tx3); white-space: nowrap; opacity: 0; transition: .15s;
  pointer-events: none;
}
.grad-swatch:hover::after { opacity: 1 }

/* ===== Drop Zone ===== */
.drop-zone {
  border: 2px dashed var(--bd); border-radius: var(--r);
  padding: 24px; text-align: center; cursor: pointer;
  transition: var(--transition); position: relative;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--pr); background: rgba(124,108,240,.05);
}
.drop-zone.has-file { border-color: var(--ok); background: rgba(34,211,160,.05) }
.drop-zone-text { pointer-events: none }
.drop-zone-text span { font-size: 1.8rem; display: block; margin-bottom: 6px }
.drop-zone-text p { font-size: .8rem; color: var(--tx2) }
.drop-input { position: absolute; inset: 0; opacity: 0; cursor: pointer }

/* ===== Size Buttons ===== */
.size-bar { display: flex; flex-wrap: wrap; gap: 6px }
.size-btn {
  font-size: .72rem; padding: 5px 10px; border-radius: 6px;
  background: var(--s2); border: 1px solid var(--bd); color: var(--tx2);
  transition: var(--transition);
}
.size-btn:hover, .size-btn.active { border-color: var(--pr); color: var(--pr); background: rgba(124,108,240,.08) }

/* ===== Preview Panel ===== */
.preview-panel { position: sticky; top: 70px; align-self: start }
.canvas-wrap {
  background: var(--s1); border: 1px solid var(--bd); border-radius: var(--r);
  padding: 16px; overflow: hidden; box-shadow: var(--shadow);
}
.canvas-wrap canvas { width: 100%; height: auto; border-radius: 6px; display: block }
.preview-info {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 8px; padding: 0 4px;
}
.preview-info span { font-size: .78rem; color: var(--tx3) }
.preview-hint { font-style: italic }
#sizeLabel {
  background: var(--s2); padding: 3px 10px; border-radius: 4px;
  font-family: 'JetBrains Mono', monospace; font-size: .72rem; color: var(--tx2);
}

/* ===== Batch ===== */
.batch-panel { display: none; max-width: 1480px; margin: 0 auto; padding: 0 24px 24px }
.batch-panel.active { display: block }
.batch-container {
  background: var(--s1); border: 1px solid var(--bd); border-radius: var(--r);
  padding: 24px;
}
.batch-input-area h3 { font-size: 1rem; margin-bottom: 6px }
.batch-hint { color: var(--tx2); font-size: .82rem; margin-bottom: 12px }
.batch-input-area textarea {
  width: 100%; min-height: 120px;
  background: var(--s2); border: 1px solid var(--bd); border-radius: var(--r-sm);
  padding: 12px; color: var(--tx); font-family: 'JetBrains Mono', monospace;
  font-size: .82rem; resize: vertical; transition: var(--transition);
}
.batch-input-area textarea:focus { outline: none; border-color: var(--pr) }
.batch-file-row { display: flex; align-items: center; gap: 12px; margin-top: 10px }
.batch-count { font-size: .78rem; color: var(--tx3) }
.batch-actions { display: flex; gap: 10px; margin-top: 14px }
.batch-preview {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px; margin-top: 20px;
}
.batch-item { position: relative }
.batch-item canvas { width: 100%; border-radius: 8px; border: 1px solid var(--bd); display: block }
.batch-item-label {
  position: absolute; bottom: 8px; left: 8px; right: 8px;
  background: rgba(0,0,0,.7); backdrop-filter: blur(4px);
  padding: 4px 10px; border-radius: 6px;
  font-size: .72rem; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,.6); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .25s;
}
.modal-overlay.open { opacity: 1; pointer-events: all }
.modal-card {
  background: var(--s1); border: 1px solid var(--bd); border-radius: 16px;
  padding: 32px; max-width: 460px; width: 90%; text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.5); position: relative;
  transform: translateY(20px); transition: transform .25s;
}
.modal-overlay.open .modal-card { transform: translateY(0) }
.modal-close {
  position: absolute; top: 12px; right: 16px;
  background: none; border: none; color: var(--tx2); font-size: 1.2rem;
}
.modal-card h3 { font-size: 1.2rem; margin-bottom: 8px }
.modal-card > p { color: var(--tx2); font-size: .88rem; margin-bottom: 20px }
.donate-images { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap }
.donate-item { display: flex; flex-direction: column; align-items: center; gap: 8px }
.donate-item span { font-size: .78rem; color: var(--tx2) }
.donate-qr { width: 150px; height: 150px; border-radius: 12px; border: 1px solid var(--bd); object-fit: cover; background: var(--s2) }
.donate-thanks { color: var(--tx3); font-size: .78rem; margin-top: 16px }

/* ===== Footer ===== */
.footer { text-align: center; padding: 28px 24px; color: var(--tx3); font-size: .78rem; border-top: 1px solid var(--bd); margin-top: 40px }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--ok); color: #000; padding: 10px 24px;
  border-radius: 10px; font-weight: 600; font-size: .85rem;
  z-index: 999; transition: transform .3s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 4px 16px rgba(0,0,0,.3);
}
.toast.show { transform: translateX(-50%) translateY(0) }

/* ===== Responsive ===== */
@media(max-width: 768px) {
  .template-grid { grid-template-columns: repeat(3, 1fr) }
  .grad-grid { grid-template-columns: repeat(4, 1fr) }
  .hero { padding: 28px 16px 16px }
  .app { padding: 16px }
  .nav-inner { padding: 8px 16px }
  .donate-images { flex-direction: column; align-items: center }
}
@media(max-width: 480px) {
  .template-grid { grid-template-columns: repeat(2, 1fr) }
  .nav-links .nav-btn span { display: none }
}