:root {
  --donation-max-width: 1080px;
  --donation-radius-lg: 32px;
  --donation-radius: 24px;
  --donation-gap: clamp(1.6rem, 4vw, 2.5rem);
  --donation-surface: color-mix(in srgb, var(--surface-card) 92%, #ffffff 8%);
  --donation-surface-soft: color-mix(in srgb, var(--surface-card) 85%, var(--bg-primary) 15%);
  --donation-chip: color-mix(in srgb, var(--accent-primary) 12%, transparent);
  --donation-shadow: 0 32px 70px color-mix(in srgb, var(--shadow-primary) 40%, transparent);
  --donation-shadow-soft: 0 25px 45px color-mix(in srgb, var(--shadow-primary) 30%, transparent);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
}

.donation-page {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  background: linear-gradient(180deg, color-mix(in srgb, var(--bg-secondary) 85%, #ffffff 15%) 0%, var(--bg-primary) 100%);
  padding-top: var(--header-height, 0px);
}

.donation-page main {
  width: min(var(--donation-max-width), calc(100% - 2.8rem));
  margin: 0 auto;
  display: grid;
  gap: var(--donation-gap);
  padding: clamp(2.4rem, 6vw, 4rem) 0 clamp(3rem, 8vw, 4.8rem);
}

.donation-page [data-lucide] {
  width: 26px;
  height: 26px;
}

/* Hero */
.donation-header {
  width: min(var(--donation-max-width), calc(100% - 2.8rem));
  margin: clamp(1.4rem, 4vw, 2.4rem) auto 0;
  padding: clamp(2.6rem, 6vw, 3.8rem);
  border-radius: var(--donation-radius-lg);
  background: linear-gradient(130deg, var(--accent-secondary), color-mix(in srgb, var(--accent-primary) 70%, var(--accent-secondary) 30%));
  color: var(--text-white);
  position: relative;
  overflow: hidden;
  box-shadow: var(--donation-shadow);
}

.donation-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 100% at 15% 20%, rgba(255, 255, 255, 0.45), transparent 50%);
  pointer-events: none;
}

.donation-header h1,
.donation-header p {
  position: relative;
  z-index: 1;
  margin: 0;
}

.donation-header h1 {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.donation-header p {
  margin-top: 1rem;
  max-width: 640px;
  font-size: clamp(1.05rem, 2.6vw, 1.2rem);
  line-height: 1.7;
  color: color-mix(in srgb, var(--text-white) 92%, rgba(255, 255, 255, 0.7) 8%);
}

/* Container + primitives */
.donation-container {
  display: grid;
  gap: var(--donation-gap);
}

.donation-card {
  border-radius: var(--donation-radius);
  background: var(--donation-surface);
  border: 1px solid color-mix(in srgb, var(--border-light) 60%, transparent);
  padding: clamp(1.8rem, 4vw, 2.6rem);
  box-shadow: var(--donation-shadow-soft);
}

.donation-card--center {
  text-align: center;
  display: grid;
  gap: 0.9rem;
  justify-items: center;
}

.donation-card h2,
.donation-card h3,
.donation-card h4 {
  margin: 0;
  font-weight: 700;
  color: var(--text-primary);
}

.donation-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Intro card */
.donation-hero {
  display: grid;
  gap: 0.8rem;
}

.donation-hero h2 {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent-primary);
  font-size: clamp(1.5rem, 3vw, 1.9rem);
}

.donation-hero span {
  color: var(--text-primary);
  font-weight: 600;
}

/* Impact list */
.donation-impact ul {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.donation-impact li {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  border-radius: 18px;
  padding: 0.85rem 1.1rem;
  background: var(--donation-surface-soft);
  border: 1px solid color-mix(in srgb, var(--border-light) 70%, transparent);
  font-weight: 600;
  color: var(--text-primary);
}

.donation-impact li [data-lucide] {
  color: var(--accent-secondary);
}

/* Tiers */
.donation-tiers {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tier-card {
  position: relative;
  border-radius: 26px;
  padding: 1.8rem;
  background: linear-gradient(150deg, var(--donation-surface) 0%, color-mix(in srgb, var(--bg-secondary) 85%, #ffffff 15%) 100%);
  border: 1px solid color-mix(in srgb, var(--border-light) 55%, transparent);
  box-shadow: var(--donation-shadow-soft);
  display: grid;
  gap: 0.45rem;
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.tier-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 60px color-mix(in srgb, var(--shadow-primary) 45%, transparent);
}

.tier-card__badge {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: color-mix(in srgb, var(--accent-primary) 18%, transparent);
  color: var(--accent-primary);
}

.tier-card__title {
  margin: 0;
  font-size: 1.1rem;
}

.tier-card__amount {
  margin: 0;
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.tier-card__desc {
  margin: 0.2rem 0 0;
  color: var(--text-secondary);
}

.tier-card__cta {
  margin-top: 0.6rem;
}

/* Donation methods */
.donation-methods {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.method {
  border-radius: 26px;
  padding: 1.9rem;
  border: 1px solid color-mix(in srgb, var(--border-light) 60%, transparent);
  background: var(--donation-surface);
  box-shadow: var(--donation-shadow-soft);
  display: grid;
  gap: 1rem;
}

.method h4 {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.method ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.method li strong {
  color: var(--text-primary);
}

.donation-amount {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  color: var(--text-primary);
}

.donation-amount input {
  border: 1px solid color-mix(in srgb, var(--accent-secondary) 30%, transparent);
  border-radius: 14px;
  padding: 0.75rem 1rem;
  background: var(--donation-surface-soft);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-size: 1rem;
  color: var(--text-primary);
}

.donation-amount input:focus {
  outline: none;
  border-color: var(--accent-secondary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-secondary) 25%, transparent);
}

.paypal-btn {
  width: 100%;
  justify-content: center;
  gap: 0.5rem;
}

/* Crypto rows */
.crypto-row {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  border: 1px dashed color-mix(in srgb, var(--accent-primary) 40%, transparent);
  background: color-mix(in srgb, var(--accent-primary) 8%, transparent);
}

.crypto-label {
  font-weight: 600;
  color: var(--accent-primary);
}

.crypto-address {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.9rem;
  word-break: break-all;
  color: var(--text-primary);
}

.copy-btn {
  padding: 0.4rem 0.9rem;
  border-radius: 10px;
}

/* Thank you / privacy */
.thank-you {
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-primary) 18%, transparent), color-mix(in srgb, var(--accent-secondary) 28%, transparent));
  border: 1px solid color-mix(in srgb, var(--accent-primary) 25%, transparent);
}

.thank-you h2 {
  font-size: 2rem;
  color: var(--accent-primary);
}

.donation-privacy {
  background: var(--donation-surface-soft);
  border: 1px solid color-mix(in srgb, var(--border-light) 70%, transparent);
}

/* Toast */
.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 2.6rem;
  transform: translate(-50%, 20px);
  background: var(--accent-primary);
  color: var(--text-white);
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 25px 45px color-mix(in srgb, var(--shadow-primary) 45%, transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 999;
}

.copy-toast[hidden] {
  display: block;
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Footer */
.donation-page footer {
  width: min(var(--donation-max-width), calc(100% - 2.8rem));
  margin: 0 auto clamp(2.6rem, 5vw, 3.4rem);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.donation-page footer a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
}

.donation-page footer a:hover,
.donation-page footer a:focus-visible {
  text-decoration: underline;
}

/* Buttons */
.donation-page .sf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 12px;
  padding: 0.75rem 1.2rem;
  border: none;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.donation-page .sf-btn--primary {
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
  color: var(--text-white);
  box-shadow: 0 20px 35px color-mix(in srgb, var(--accent-primary) 35%, transparent);
}

.donation-page .sf-btn--ghost {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--border-light) 65%, transparent);
  color: var(--text-primary);
}

.donation-page .sf-btn:hover,
.donation-page .sf-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px color-mix(in srgb, var(--shadow-primary) 45%, transparent);
}

.donation-page .sf-btn--block {
  width: 100%;
}

/* Responsive */
@media (max-width: 880px) {
  .donation-header,
  .donation-page footer {
    width: min(760px, calc(100% - 2rem));
  }

  .donation-page main {
    width: min(760px, calc(100% - 2rem));
  }

  .donation-card,
  .method {
    padding: 1.6rem;
  }
}

@media (max-width: 600px) {
  .donation-header h1 {
    font-size: 1.8rem;
  }

  .donation-header {
    padding: 2.2rem 1.7rem;
  }

  .donation-page [data-lucide] {
    width: 24px;
    height: 24px;
  }

  .donation-impact li {
    flex-direction: column;
    align-items: flex-start;
  }

  .tier-card__badge {
    position: static;
    display: inline-flex;
    margin-bottom: 0.5rem;
  }

  .crypto-row {
    grid-template-columns: auto 1fr auto;
  }

  .donation-methods {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .donation-header,
  .donation-page main,
  .donation-page footer {
    width: calc(100% - 1.4rem);
  }

  .donation-page .sf-btn {
    width: 100%;
  }

  .copy-toast {
    width: calc(100% - 2rem);
  }
}