/* ---------- Reset premium + tokens ---------- */
:root {
  --bg: #0b1020;
  --surface: #0f172a;     /* slate-900 */
  --surface-2: #111827;   /* gray-900 */
  --content: #e5e7eb;     /* gray-200 */
  --muted: #9aa4b2;       /* slate-400 */
  --primary: #4b8cf7;     /* brand blue */
  --primary-2: #7aa8ff;   /* lighter */
  --accent: #f59e0b;      /* amber-500 */
  --danger: #ef4444;
  --ok: #22c55e;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow-1: 0 6px 24px -10px rgba(0,0,0,.35), 0 2px 12px -6px rgba(0,0,0,.4);
  --shadow-2: 0 20px 50px -25px rgba(0,0,0,.6), 0 10px 30px -15px rgba(0,0,0,.5);
  --ring: 2px solid rgba(75,140,247,.55);

  --container: clamp(320px, 92vw, 1080px);
  --stack-1: clamp(16px, 2.6vw, 24px);
  --stack-2: clamp(24px, 4.2vw, 36px);
  --stack-3: clamp(36px, 6vw, 48px);
  --stack-4: clamp(48px, 8vw, 72px);
}

html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(75,140,247,.25), transparent 60%),
    radial-gradient(900px 600px at -10% 10%, rgba(245,158,11,.20), transparent 60%),
    radial-gradient(1200px 700px at 50% 120%, rgba(99,102,241,.25), transparent 70%),
    var(--bg);
  color: var(--content);
  line-height: 1.55;
}

/* Light mode tokens */
:root:not(.dark) {
  --bg: #f7f8fc;
  --surface: #ffffff;
  --surface-2: #f9fafb;
  --content: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-2: #3b82f6;
  --accent: #f59e0b;
  --ring: 2px solid rgba(37,99,235,.5);
}

/* A11y */
*:focus { outline: none; }
:where(button, [href], input, select, textarea):focus-visible {
  outline: var(--ring);
  outline-offset: 2px;
  border-radius: 12px;
}

/* Links */
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Container & wrappers */
.container { width: var(--container); margin: 0 auto; padding: var(--stack-2) var(--stack-1); }
.wrap { width: var(--container); margin: 0 auto; padding: 0 var(--stack-1); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: saturate(140%) blur(12px);
  background: color-mix(in oklab, var(--bg) 86%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--muted) 22%, transparent);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: .6rem;
  font-weight: 800; letter-spacing: .2px; text-decoration: none;
  color: var(--content);
}
.brand-mark {
  display: grid; place-items: center;
  width: 28px; height: 28px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), color-mix(in oklab, var(--primary) 70%, #fff));
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.18), var(--shadow-1);
}
.brand-text { font-family: "Space Grotesk", Inter, sans-serif; font-weight: 700; }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus { position: static; width: auto; height: auto; padding: .6rem .9rem; background: var(--surface); border-radius: 10px; }

/* Footer */
.site-footer { border-top: 1px solid color-mix(in oklab, var(--muted) 22%, transparent); }
.site-footer .wrap { padding: var(--stack-2) var(--stack-1); text-align: center; }
.site-footer .meta { color: var(--muted); display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn {
  --btn-bg: var(--primary);
  --btn-fg: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: .6rem;
  border: 0; color: var(--btn-fg); background: var(--btn-bg);
  padding: .9rem 1.2rem; border-radius: 14px; font-weight: 700; cursor: pointer;
  box-shadow: 0 10px 25px -10px color-mix(in oklab, var(--primary) 65%, black);
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 14px 35px -12px color-mix(in oklab, var(--primary) 70%, black); }
.btn:active { transform: translateY(0); }
.btn[data-loading="true"] { cursor: default; opacity: .85; }
.btn[data-loading="true"]::after {
  content: " Enviando…";
}
.btn-ghost {
  --btn-bg: color-mix(in oklab, var(--surface) 75%, transparent);
  --btn-fg: var(--content);
  border: 1px solid color-mix(in oklab, var(--muted) 25%, transparent);
  box-shadow: none;
}
.btn-outline {
  background: transparent; color: var(--primary);
  border: 1px solid color-mix(in oklab, var(--primary) 60%, currentColor);
}

/* Cards */
.card {
  background: color-mix(in oklab, var(--surface) 86%, transparent);
  border: 1px solid color-mix(in oklab, var(--muted) 18%, transparent);
  border-radius: var(--radius);
  padding: clamp(16px, 3.5vw, 28px);
  box-shadow: var(--shadow-1);
  backdrop-filter: saturate(120%) blur(8px);
}

/* Hero */
.hero {
  text-align: center;
  padding: var(--stack-3) 0 var(--stack-2);
}
.h1 {
  font-family: "Space Grotesk", Inter, system-ui, sans-serif;
  font-weight: 800;
  font-size: clamp(28px, 4.8vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.gradient-text {
  background: linear-gradient(92deg, var(--primary), #8b5cf6, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtle { color: var(--muted); font-size: clamp(15px, 2.2vw, 18px); }

/* Grid util */
.grid { display: grid; gap: 1.2rem; }
.grid-2 { grid-template-columns: 1fr; }
@media (min-width: 840px) { .grid-2 { grid-template-columns: 1.2fr .8fr; } }

/* Formulário */
.field { margin-bottom: 1rem; }
label { display: block; font-weight: 600; margin: 0 0 .4rem; }
input, select {
  width: 100%;
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  color: var(--content);
  border: 1px solid color-mix(in oklab, var(--muted) 20%, transparent);
  border-radius: 12px;
  padding: .9rem 1rem;
  font-size: 1rem;
  transition: border-color .2s ease, background .2s ease;
}
input::placeholder { color: color-mix(in oklab, var(--muted) 70%, transparent); }
input:focus, select:focus {
  border-color: color-mix(in oklab, var(--primary) 55%, currentColor);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--primary) 25%, transparent);
}
small.help { display: block; color: var(--muted); margin-top: .3rem; }
small.error { display: block; color: var(--danger); margin-top: .35rem; font-weight: 600; }

/* Trust badges */
.badges { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: .6rem; margin-top: .8rem; }
.badge {
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  border: 1px solid color-mix(in oklab, var(--muted) 20%, transparent);
  border-radius: 12px; padding: .5rem .7rem; text-align: center; font-size: .9rem; color: var(--muted);
}

/* Donation */
.donation .pix {
  display: inline-flex; align-items: center; gap: .6rem;
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  border: 1px dashed color-mix(in oklab, var(--muted) 30%, transparent);
  padding: .6rem .8rem; border-radius: 12px; word-break: break-all;
}
.copy-btn { margin-left: .6rem; }

/* Progress bar opcional */
.progress {
  height: 10px; border-radius: 999px;
  background: color-mix(in oklab, var(--muted) 20%, transparent);
  overflow: hidden; margin-top: .8rem;
}
.progress > i {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--primary), #8b5cf6);
}

/* FAQ */
.faq details {
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  border: 1px solid color-mix(in oklab, var(--muted) 18%, transparent);
  border-radius: 12px; padding: .9rem 1rem; margin-bottom: .8rem;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin: .6rem 0 0; color: var(--muted); }

/* Toasts (Django messages) */
.toast-region { position: fixed; top: 76px; left: 50%; transform: translateX(-50%); z-index: 60; width: min(92vw, 480px); }
.toast {
  background: color-mix(in oklab, var(--surface) 95%, transparent);
  border: 1px solid color-mix(in oklab, var(--muted) 22%, transparent);
  color: var(--content); padding: .8rem 1rem; border-radius: 12px; margin-bottom: .6rem;
  box-shadow: var(--shadow-1);
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
  .card, .toast { animation: fade-in .45s ease both; }
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}