/* SPDX-License-Identifier: Apache-2.0 */

:root {
  --bg: #0b1020;
  --bg-soft: #121933;
  --card: #161f3d;
  --card-hover: #1c2850;
  --border: #273156;
  --text: #eef2ff;
  --muted: #9aa6c7;
  --brand-1: #3b82f6;
  --brand-2: #7c3aed;
  --brand-3: #d946ef;
  --accent: #60a5fa;
  --ok: #34d399;
  --warn: #fbbf24;
  --radius: 16px;
  --maxw: 1080px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(59,130,246,0.22), transparent 60%),
    radial-gradient(1000px 700px at 90% 0%, rgba(124,58,237,0.22), transparent 55%),
    var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Top nav ---------- */
.topnav {
  display: flex; justify-content: flex-end; align-items: center; gap: 10px;
  padding: 18px 0 0;
}
.topnav a {
  font-size: 0.9rem; font-weight: 600; color: var(--text);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 7px 15px; background: rgba(255,255,255,0.03);
  transition: background .15s ease, border-color .15s ease, transform .05s ease;
}
.topnav a:hover { text-decoration: none; background: var(--card-hover); border-color: var(--accent); }
.topnav a:active { transform: translateY(1px); }
.topnav a.kofi {
  color: #fff; border-color: transparent;
  background: #ff5e5b;
}
.topnav a.kofi:hover { background: #ff4542; border-color: transparent; }

/* ---------- Header / hero ---------- */
header.hero { padding: 40px 0 28px; text-align: center; }

.logo {
  width: 96px; height: 96px; border-radius: 22px;
  box-shadow: 0 12px 40px rgba(124,58,237,0.35);
  margin: 0 auto 22px; display: block;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #fff, #c7d2fe 60%, var(--brand-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.subtitle { color: var(--muted); font-size: 1.12rem; max-width: 640px; margin: 0 auto 6px; }

.badges { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }
.badge {
  font-size: 0.8rem; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 12px; background: rgba(255,255,255,0.02);
}
.badge strong { color: var(--text); font-weight: 600; }

/* ---------- Drop zone ---------- */
main { padding-bottom: 64px; }

.drop {
  margin: 12px 0 8px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-soft), var(--card));
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease, transform .05s ease;
}
.drop:hover { border-color: var(--accent); }
.drop.dragover { border-color: var(--brand-3); background: var(--card-hover); }
.drop .big { font-size: 1.15rem; font-weight: 600; margin: 8px 0 4px; }
.drop .hint { color: var(--muted); font-size: 0.92rem; }
.drop .up-ico { font-size: 2.4rem; opacity: .9; }

.status { min-height: 24px; text-align: center; color: var(--muted); margin: 14px 0; font-size: .95rem; }
.status.warn { color: var(--warn); }
.status.ok { color: var(--ok); }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex; gap: 12px; align-items: center; justify-content: center;
  flex-wrap: wrap; margin: 8px 0 24px;
}
button.btn {
  font: inherit; font-weight: 600;
  border: 0; border-radius: 12px; padding: 12px 22px;
  color: #fff; cursor: pointer;
  background: linear-gradient(90deg, var(--brand-1), var(--brand-2));
  box-shadow: 0 8px 24px rgba(59,130,246,0.3);
  transition: transform .05s ease, box-shadow .15s ease, opacity .15s ease;
}
button.btn:hover { box-shadow: 0 10px 30px rgba(124,58,237,0.4); }
button.btn:active { transform: translateY(1px); }
button.btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }
button.btn.secondary { background: transparent; border: 1px solid var(--border); box-shadow: none; }
button.btn.secondary:hover { background: var(--card-hover); }

/* ---------- Preview grid ---------- */
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  margin-top: 12px;
}
.cell {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 10px 10px; text-align: center;
}
.cell .frame {
  height: 88px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 8px;
}
.cell img { image-rendering: auto; border-radius: 6px; background: #0006; }
.cell .name { font-size: .78rem; font-weight: 600; word-break: break-all; }
.cell .px { font-size: .72rem; color: var(--muted); }

/* ---------- Sections ---------- */
section.block { margin: 52px 0; }
section.block h2 { font-size: 1.4rem; letter-spacing: -0.01em; margin: 0 0 14px; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px 24px;
}

pre.code {
  background: #0a0f1f; border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; margin: 0;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88rem; color: #d7e0ff;
}
pre.code .c { color: #6b7bb0; }
pre.code .g { color: #8be9a0; }

.steps { color: var(--muted); padding-left: 20px; }
.steps li { margin: 6px 0; }
.steps code { color: var(--text); background: #0a0f1f; border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; font-size: .85em; }

.features { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.feature h3 { margin: 0 0 6px; font-size: 1rem; }
.feature p { margin: 0; color: var(--muted); font-size: .92rem; }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--border); padding: 28px 0 48px; color: var(--muted); font-size: .88rem; text-align: center; }
footer a { color: var(--accent); }
footer .support { margin: 0 0 14px; font-size: 1rem; color: var(--text); }
footer a.kofi-link {
  display: inline-block; color: #fff; font-weight: 600;
  background: #ff5e5b; border-radius: 999px; padding: 8px 18px; margin-left: 4px;
  transition: background .15s ease, transform .05s ease;
}
footer a.kofi-link:hover { background: #ff4542; text-decoration: none; }
footer a.kofi-link:active { transform: translateY(1px); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

@media (max-width: 560px) {
  header.hero { padding: 36px 0 20px; }
  .drop { padding: 32px 16px; }
}