:root {
  /* Endfield news-like light theme: white base + low-sat yellow/gray */
  --bg: #f5f6f8;
  --bg-soft: #eef0f4;
  --card: #ffffff;
  --card-strong: #fdfdfd;
  --stroke: rgba(15, 23, 42, 0.08);
  --stroke-soft: rgba(15, 23, 42, 0.04);
  --text: #111827;
  --subtext: #6b7280;
  --accent: #f3d27a;        /* 柔和黄 */
  --accent-strong: #e0b95b; /* 稍深一点 */
  --danger: #ef4444;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.10);
  --shadow-float: 0 18px 50px rgba(15, 23, 42, 0.16);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    /* 顶部淡淡的等高线与晕光 */
    radial-gradient(circle at 50% 0%, rgba(244, 219, 143, 0.25), transparent 55%),
    repeating-radial-gradient(circle at 20% 0%,
      rgba(244, 219, 143, 0.35) 0px,
      rgba(244, 219, 143, 0.20) 2px,
      transparent 2px,
      transparent 22px),
    /* 背景格网 */
    linear-gradient(var(--stroke-soft) 2px, transparent 2px),
    linear-gradient(90deg, var(--stroke-soft) 2px, transparent 2px),
    linear-gradient(180deg, #fdfdfd 0%, #f4f5f7 40%, #eef0f4 100%);
  background-size:
    auto,
    auto,
    72px 72px,
    72px 72px,
    auto;
  min-height: 100vh;
}

.app {
  max-width: 1180px;
  margin: 28px auto 40px;
  padding: 0 18px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  padding: 22px 24px;
  background: linear-gradient(135deg, #ffffff 0%, #f9fafb 55%, #f5f5f6 100%);
  border: 1px solid var(--stroke-soft);
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  box-shadow: var(--shadow-float);
}
.hero::before, .hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(40px);
  opacity: 0.7;
}
.hero::before {
  width: 180px; height: 180px;
  background: rgba(244, 219, 143, 0.55);
  right: -60px; top: -40px;
}
.hero::after {
  width: 140px; height: 140px;
  background: rgba(148, 163, 184, 0.50);
  left: -40px; bottom: -60px;
}
.hero-main { position: relative; z-index: 1; }
.hero h1 {
  margin: 4px 0 6px;
  font-size: 30px;
  letter-spacing: 0.4px;
}
.hero p { margin: 8px 0 14px; color: var(--subtext); }
.eyebrow {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(243, 210, 122, 0.14);
  border: 1px solid rgba(243, 210, 122, 0.45);
  font-size: 12px;
  letter-spacing: 0.5px;
  color: #92400e;
}
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.chip {
  padding: 6px 10px;
  border-radius: 999px;
  background: #f9fafb;
  border: 1px solid var(--stroke-soft);
  font-size: 12px;
}

.summary-card {
  display: none;
}
.summary-title {
  color: #111827;
  font-weight: 600;
  margin-bottom: 8px;
}
.summary-card ul {
  margin: 0; padding-left: 18px;
  color: var(--subtext);
  line-height: 1.6;
}

.hero-actions{
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  gap: 10px;
  z-index: 2;
}

main { display: flex; flex-direction: column; gap: 16px; }

/* Intro bar */
.intro{
  margin-top: 4px;
  padding: 10px 14px;
  border-radius: 10px;
  background: #f9fafb;
  border: 1px solid var(--stroke-soft);
  font-size: 13px;
  color: var(--subtext);
}
.intro-title{
  font-size: 13px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 4px;
}

/* Controls */
.controls {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.controls .col {
  background: var(--card);
  border: 1px solid var(--stroke-soft);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.controls .col:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow-float);
  border-color: rgba(209, 213, 219, 0.9);
}
.controls h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.small-muted { color: var(--subtext); font-size: 12px; }

label { display: block; margin: 10px 0 6px; color: var(--subtext); font-size: 13px; }
input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: #f9fafb;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus {
  border-color: rgba(243, 210, 122, 0.9);
  box-shadow: 0 0 0 2px rgba(243, 210, 122, 0.45);
}
.upload-row {
  margin-top: 10px;
  padding: 10px;
  border-radius: 10px;
  border: 1px dashed rgba(148, 163, 184, 0.6);
  background: #f9fafb;
  color: var(--subtext);
  font-size: 13px;
}
.btn-row { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }

hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin: 12px 0;
}

/* Buttons */
button {
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: linear-gradient(180deg, #ffffff, #f9fafb);
  color: #111827;
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s, border-color 0.15s;
  font-weight: 600;
}
button:hover { transform: translateY(-1px); border-color: rgba(107, 114, 128, 0.9); box-shadow: 0 10px 24px rgba(15,23,42,0.18); }
button:active { transform: translateY(0); }
button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #422006;
  border-color: transparent;
}
button.secondary {
  background: #f9fafb;
  border-color: rgba(148, 163, 184, 0.9);
}
button.ghost {
  background: transparent;
}
button.small{
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.3px;
}
button.danger{
  border-color: rgba(239, 68, 68, 0.65);
  color: #b91c1c;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}
.buttons { margin-top: 10px; display:flex; gap:10px; flex-wrap:wrap; }

/* Canvas */
.canvas-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--stroke-soft);
  padding: 14px;
  border-radius: 14px;
  box-shadow: var(--shadow-float);
}
.canvas-inner{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
#canvas {
  background: #020617;
  border: 1px solid rgba(15, 23, 42, 0.3);
  border-radius: 12px;
  width: 520px;
  max-width: 100%;
  height: 520px;
  cursor: grab;
}
.hint { color: var(--subtext); font-size: 13px; line-height: 1.4; text-align: center; }

/* Thumbs & examples */
.examples {
  background: var(--card);
  border: 1px solid var(--stroke-soft);
  border-radius: 12px;
  padding: 12px 14px 16px;
  box-shadow: var(--shadow);
}
.examples h3 { margin: 0 0 8px; }
.thumb-list { display:flex; gap:10px; flex-wrap:wrap; margin-top:8px; }
.thumb-list img {
  width: 102px; height:102px;
  object-fit:cover;
  border-radius:10px;
  border: 1px solid rgba(209, 213, 219, 0.9);
  background: #f9fafb;
  box-shadow: 0 6px 16px rgba(15,23,42,0.18);
}

footer {
  margin-top: 8px;
  color: var(--subtext);
  font-size: 13px;
  text-align: center;
  padding: 10px 0 0;
}

/* Modal */
.hidden { display: none; }
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.35);
  display: grid;
  place-items: center;
  z-index: 10;
  padding: 12px;
}
.modal-content {
  width: min(420px, 94vw);
  background: var(--card-strong);
  border: 1px solid rgba(148, 163, 184, 0.75);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow-float);
}
.modal-content h3 { margin: 0 0 8px; }
.modal-content p { margin: 0 0 12px; color: var(--subtext); }
.modal-buttons { display:flex; justify-content:flex-end; gap: 10px; margin-top: 12px; }
.modal-msg { margin-top: 8px; color: var(--accent); font-size: 13px; }

@media (max-width: 900px) {
  #canvas { height: 440px; }
}

@media (max-width: 600px) {
  .app { margin-top: 18px; }
  .hero { padding: 18px; }
  #canvas { height: 360px; }
}

/* Screen-reader only */
.sr-only{
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}