:root {
    --teal: #2B6777;
    --teal-dark: #1E4A56;
    --teal-light: #E8F1F3;
    --orange: #FF3300;
    --orange-dark: #D62900;
    --ink: #16232A;
    --muted: #6B7B82;
    --border: #E1E8EA;
    --bg: #F6F8F9;
    --surface: #FFFFFF;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(22,35,42,0.06), 0 1px 8px rgba(22,35,42,0.04);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--ink);
    font-size: 15px;
    line-height: 1.5;
}
.text-muted { color: var(--muted); }
.small { font-size: 13px; }
.hidden { display: none !important; }

.public-shell { max-width: 820px; margin: 0 auto; padding: 32px 20px 60px; }
.public-header { text-align: center; margin-bottom: 32px; }
.public-brand { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 10px; }
.brand-mark { width: 34px; height: 34px; border-radius: 9px; background: linear-gradient(135deg, var(--orange), var(--teal)); }
.brand-name { font-weight: 800; font-size: 22px; letter-spacing: -0.02em; }
.public-tagline { color: var(--muted); font-size: 14px; margin: 0; }
.public-footer { text-align: center; margin-top: 30px; }

.composer-block { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; box-shadow: var(--shadow); }
.block-label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 10px; color: var(--ink); }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 18px; border-radius: 8px; font-size: 14px; font-weight: 600;
    border: 1px solid transparent; cursor: pointer; transition: all 0.15s ease; text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-dark); }
.btn-primary:disabled { background: #F2B7A8; cursor: not-allowed; }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { background: var(--bg); }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.split-tool-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.split-grid-input { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.split-grid-input input { width: 50px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; }

.crop-tabs { display: flex; gap: 6px; margin-bottom: 14px; border-bottom: 1px solid var(--border); }
.crop-tab {
    padding: 8px 14px; border: none; background: none; cursor: pointer; font-size: 13px; font-weight: 600;
    color: var(--muted); border-bottom: 2px solid transparent;
}
.crop-tab.active { color: var(--teal-dark); border-bottom-color: var(--orange); }

.crop-canvas-wrap { display: flex; justify-content: center; background: var(--bg); border-radius: 8px; padding: 10px; margin-bottom: 10px; }
#ctCanvas { cursor: crosshair; max-width: 100%; border-radius: 4px; }

.crop-selection-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; min-height: 24px; }
.crop-chip {
    display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600;
    padding: 3px 6px 3px 10px; border: 1.5px solid var(--teal); border-radius: 999px; color: var(--ink);
}
.crop-chip-remove { border: none; background: none; cursor: pointer; color: var(--muted); font-size: 11px; padding: 2px; }
.crop-chip-remove:hover { color: #D62828; }
.crop-controls { display: flex; justify-content: center; }

.ct-results { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.ct-result-card { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px; text-align: center; }
.ct-result-card img { width: 100%; border-radius: 6px; margin-bottom: 8px; display: block; }
.ct-result-meta { font-size: 11px; color: var(--muted); margin-bottom: 8px; }

@media (max-width: 600px) {
    .public-shell { padding: 20px 14px 40px; }
    .split-tool-row { flex-direction: column; align-items: flex-start; }
}