:root {
	--bg: #f6f7fb;
	--surface: #ffffff;
	--text: #0f172a;
	--muted: #5b6477;
	--border: #e3e7ef;
	--accent: #1e7b85;          /* Scribd-ish teal */
	--accent-hover: #17646c;
	--accent-soft: #e4f3f4;
	--danger: #c0392b;
	--nav: #0f172a;
	--radius: 14px;
	--shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.06);
}
@media (prefers-color-scheme: dark) {
	:root {
		--bg: #0b1120;
		--surface: #121a2c;
		--text: #e6e9f0;
		--muted: #97a0b3;
		--border: #232d44;
		--accent: #3fb4bf;
		--accent-hover: #5cc6d0;
		--accent-soft: #15303a;
		--danger: #ff6b5b;
		--nav: #070c18;
		--shadow: 0 8px 24px rgba(0,0,0,.35);
	}
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	background: var(--bg);
	color: var(--text);
	line-height: 1.6;
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}
a { color: var(--accent); }
code {
	font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
	font-size: .88em;
	background: var(--accent-soft);
	padding: .1em .4em;
	border-radius: 6px;
	word-break: break-all;
}
.wrap { width: 100%; max-width: 860px; margin: 0 auto; padding: 0 16px; }

/* ---------- Nav ---------- */
.nav { background: var(--nav); color: #fff; position: sticky; top: 0; z-index: 10; }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 16px; }
.brand { color: #fff; text-decoration: none; font-weight: 700; letter-spacing: -.01em; white-space: nowrap; }
.brand span { color: #5cc6d0; }
.nav-toggle {
	display: none; background: none; border: 1px solid rgba(255,255,255,.25); color: #fff;
	border-radius: 8px; padding: 6px 10px; font: inherit; cursor: pointer;
}
.nav-links { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav-links a {
	color: rgba(255,255,255,.75); text-decoration: none; font-size: .9rem;
	padding: 6px 10px; border-radius: 8px; display: block;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: #fff; background: rgba(255,255,255,.08); }
@media (max-width: 820px) {
	.nav-toggle { display: block; }
	.nav .wrap { flex-wrap: wrap; }
	.nav-links { display: none; flex-direction: column; width: 100%; padding-bottom: 12px; }
	.nav-links.open { display: flex; }
}

/* ---------- Hero ---------- */
main { flex: 1; }
.hero { padding: 56px 0 32px; text-align: center; }
.hero h1 {
	font-size: clamp(1.9rem, 5vw, 2.8rem);
	line-height: 1.15; letter-spacing: -.03em; margin: 0 0 12px; font-weight: 800;
}
.hero p { color: var(--muted); margin: 0 auto; max-width: 560px; font-size: 1.05rem; }

/* ---------- Form ---------- */
.card {
	background: var(--surface); border: 1px solid var(--border);
	border-radius: var(--radius); box-shadow: var(--shadow);
}
.dl-form { padding: 20px; margin-top: 28px; }
.dl-form label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 8px; text-align: left; }
.input-row { display: flex; gap: 10px; }
.input-row input {
	flex: 1; min-width: 0; font: inherit; font-size: 1rem; color: var(--text);
	background: var(--bg); border: 1.5px solid var(--border); border-radius: 10px;
	padding: 12px 14px; outline: none; transition: border-color .15s, box-shadow .15s;
}
.input-row input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.input-row input[aria-invalid="true"] { border-color: var(--danger); }
.btn {
	font: inherit; font-weight: 600; border: 0; border-radius: 10px; cursor: pointer;
	background: var(--accent); color: #fff; padding: 12px 22px; white-space: nowrap;
	transition: background .15s, transform .05s;
	display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn:hover { background: var(--accent-hover); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .7; cursor: progress; }
.spinner {
	width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff;
	border-radius: 50%; animation: spin .7s linear infinite; display: none;
}
.btn.loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.dl-form .form-msg { min-height: 1.4em; margin: 10px 0 0; max-width: none; font-size: .9rem; color: var(--danger); text-align: left; }
@media (max-width: 560px) {
	.input-row { flex-direction: column; }
	.btn { width: 100%; }
}

/* ---------- Sections ---------- */
section { margin-top: 40px; }
section h2 { font-size: 1.25rem; letter-spacing: -.01em; margin: 0 0 16px; }
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 680px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 20px; }
.step .num {
	display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
	background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .9rem; margin-bottom: 10px;
}
.step h3 { margin: 0 0 6px; font-size: 1rem; }
.step p { margin: 0; color: var(--muted); font-size: .95rem; }
.step mark { background: none; color: var(--accent); font-weight: 700; }

.notice {
	padding: 16px 20px; border-left: 4px solid var(--accent);
	background: var(--accent-soft); border-radius: 10px; font-size: .95rem;
}
.notice ul { margin: 8px 0 0; padding-left: 20px; }

.support { text-align: center; padding: 24px 20px; }
.support p { margin: 0 0 14px; color: var(--muted); }
.btn-ghost {
	background: transparent; color: var(--accent); border: 1.5px solid var(--accent);
}
.btn-ghost:hover { background: var(--accent-soft); }

/* ---------- Footer ---------- */
footer { margin-top: 56px; border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: .88rem; }
footer p { margin: 0 0 10px; }
footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); text-decoration: underline; }

/* ---------- Donate dialog ---------- */
dialog {
	border: 1px solid var(--border); border-radius: var(--radius); padding: 0;
	background: var(--surface); color: var(--text); width: min(420px, calc(100% - 32px));
	box-shadow: 0 24px 60px rgba(0,0,0,.3);
}
dialog::backdrop { background: rgba(8,12,24,.55); backdrop-filter: blur(2px); }
.dlg-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.dlg-head h2 { margin: 0; font-size: 1.1rem; }
.dlg-close { background: none; border: 0; font-size: 1.5rem; line-height: 1; cursor: pointer; color: var(--muted); padding: 4px 8px; border-radius: 6px; }
.dlg-close:hover { background: var(--bg); color: var(--text); }
.dlg-body { padding: 20px; text-align: center; }
.dlg-body > p { margin: 0 0 18px; color: var(--muted); }
.amount { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 12px; }
.amount button {
	width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--border);
	background: var(--bg); color: var(--text); font-size: 1.3rem; cursor: pointer;
}
.amount button:hover { border-color: var(--accent); color: var(--accent); }
.amount input {
	width: 4.5em; text-align: center; font: inherit; font-size: 1.6rem; font-weight: 700;
	border: 1.5px solid var(--border); border-radius: 10px; padding: 4px; background: var(--bg); color: var(--text);
	-moz-appearance: textfield;
}
.amount input::-webkit-outer-spin-button,
.amount input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.currency {
	font: inherit; font-size: .9rem; padding: 6px 10px; border-radius: 8px;
	border: 1px solid var(--border); background: var(--bg); color: var(--text); margin-bottom: 18px;
}
.donate-submit { width: 100%; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }
	

/* ---------- Result & content pages ---------- */
.result { padding: 28px 24px; margin-top: 28px; text-align: center; }
.result h2 { margin: 0 0 8px; font-size: 1.3rem; }
.result p { color: var(--muted); margin: 0 0 20px; overflow-wrap: anywhere; }
.result.error h2 { color: var(--danger); }
.result .actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
a.btn { text-decoration: none; }
.prose { padding: 28px 24px; margin-top: 28px; }
.prose h1 { margin: 0 0 16px; letter-spacing: -.02em; font-size: 1.7rem; }
.prose h2 { font-size: 1.1rem; margin: 24px 0 8px; }
.prose p, .prose li { color: var(--muted); }