/* ============================================================
   Variables globales
   ============================================================ */
:root {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", system-ui, sans-serif;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f7;
  --color-text: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-gold: #3a8e8c;
  --color-gold-light: #5ab5b3;
  --color-gold-dark: #2a6e6c;
  --color-blue: #0071e3;
  --color-blue-hover: #0077ed;
  --color-border: #d2d2d7;
  --color-success: #30d158;
  --color-error: #ff3b30;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.14);
  --transition: 0.3s ease;
  --max-width: 1100px;
}

/* ============================================================
   Reset y base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  outline: none;
}

/* ============================================================
   Tipografía
   ============================================================ */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 6vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }

p { line-height: 1.7; }

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

/* ============================================================
   Layout helpers
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 56px;
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.navbar-logo span {
  color: var(--color-gold);
}

.navbar-cta {
  padding: 8px 20px;
  background: var(--color-gold);
  color: white;
  white-space: nowrap;
  flex-shrink: 0;
  border-radius: 980px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background var(--transition);
}

.navbar-cta:hover {
  background: var(--color-gold-dark);
}

/* ============================================================
   Botones
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 980px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-gold);
  color: white;
  box-shadow: 0 4px 16px rgba(196, 151, 62, 0.35);
}

.btn-primary:hover {
  background: var(--color-gold-dark);
  box-shadow: 0 6px 24px rgba(196, 151, 62, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-gold);
  border: 2px solid var(--color-gold);
}

.btn-secondary:hover {
  background: var(--color-gold);
  color: white;
}

.btn-dark {
  background: var(--color-text);
  color: white;
}

.btn-dark:hover {
  background: #3d3d3f;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: 10px 16px;
}

.btn-ghost:hover {
  color: var(--color-text);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #0d1117 0%, #161b22 40%, #1d1d1f 100%);
  color: white;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(58, 142, 140, 0.10) 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding: 120px 24px 80px;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  margin-bottom: 24px;
  opacity: 0.9;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 1.1;
  margin-bottom: 24px;
  color: #ffffff;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  opacity: 0.4;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   Progress section
   ============================================================ */
.progress-wrap {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}

.progress-raised {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gold);
}

.progress-goal {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.progress-bar-track {
  height: 8px;
  background: var(--color-border);
  border-radius: 980px;
  overflow: hidden;
  margin-bottom: 20px;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold-dark), var(--color-gold-light));
  border-radius: 980px;
  width: 0%;
  transition: width 1.5s ease;
}

.progress-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* ============================================================
   Cards de materiales (landing + donar)
   ============================================================ */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin-top: 52px;
}

.material-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--transition);
  text-align: center;
}

.material-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--color-gold);
}

.material-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: #f5f3f0;
  border: 1px solid #e8e4de;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.material-icon svg {
  width: 52px;
  height: 52px;
}

.material-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.material-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gold);
}

.material-price-unit {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* ============================================================
   Calculadora de donación
   ============================================================ */
.donation-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  transition: all var(--transition);
}

.donation-card:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-gold);
}

.donation-card-icon {
  width: 60px;
  height: 60px;
  flex-shrink: 0;
  background: #f5f3f0;
  border: 1px solid #e8e4de;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.donation-card-icon svg {
  width: 44px;
  height: 44px;
}

.donation-card-info {
  flex: 1;
  min-width: 0;
}

.donation-card-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.donation-card-price {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.donation-card-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.qty-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 1.2rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
  line-height: 1;
  touch-action: manipulation;
}

.qty-btn:hover:not(:disabled) {
  background: var(--color-gold);
  color: white;
  border-color: var(--color-gold);
}

.qty-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.qty-display {
  font-size: 1.1rem;
  font-weight: 700;
  min-width: 28px;
  text-align: center;
}

.donation-card-subtotal {
  min-width: 64px;
  text-align: right;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gold);
  flex-shrink: 0;
}

.donation-card-progress {
  flex: 1 1 100%;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.donation-card-progress-track {
  height: 6px;
  background: var(--color-border);
  border-radius: 980px;
  overflow: hidden;
  margin-bottom: 8px;
}

.donation-card-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold-dark), var(--color-gold-light));
  border-radius: 980px;
}

.donation-card-progress-label {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

/* Barra sticky del total */
.sticky-total {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
}

.sticky-total-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.sticky-total-amount {
  display: flex;
  flex-direction: column;
}

.sticky-total-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.sticky-total-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1.1;
}

/* ============================================================
   Formulario de pago (Stripe-style)
   ============================================================ */
.payment-wrap {
  max-width: 520px;
  margin: 0 auto;
}

.payment-summary {
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
}

.payment-summary-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.payment-summary-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.payment-summary-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
}

.payment-summary-item span:last-child {
  font-weight: 600;
}

.payment-summary-divider {
  height: 1px;
  background: var(--color-border);
  margin: 12px 0;
}

.payment-summary-total {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.1rem;
}

.payment-summary-total span:last-child {
  color: var(--color-gold);
}

.payment-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-input {
  padding: 14px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(196, 151, 62, 0.15);
}

.form-input::placeholder {
  color: #b0b0b5;
}

.form-input.has-error {
  border-color: var(--color-error);
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  display: none;
}

.form-error.visible {
  display: block;
}

.card-field-wrap {
  position: relative;
}

.card-icons {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 6px;
  opacity: 0.5;
  pointer-events: none;
}

.payment-notice {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(196, 151, 62, 0.08);
  border: 1px solid rgba(196, 151, 62, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-gold-dark);
}

.method-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 4px;
}

.method-tab {
  flex: 1;
  padding: 14px 12px;
  text-align: center;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--color-bg);
  color: var(--color-text-secondary);
}

.method-tab.active {
  border-color: var(--color-gold);
  background: rgba(196, 151, 62, 0.08);
  color: var(--color-gold-dark);
}

.method-tab-badge {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-success);
  margin-top: 2px;
}

.method-panel {
  display: none;
  flex-direction: column;
  gap: 18px;
}

.method-panel.active {
  display: flex;
}

.transfer-box {
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.transfer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.transfer-row-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 2px;
}

.transfer-row-value {
  font-weight: 700;
  font-size: 1.05rem;
  font-family: ui-monospace, monospace;
}

.copy-btn {
  flex-shrink: 0;
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: all var(--transition);
}

.copy-btn:hover {
  border-color: var(--color-gold);
  color: var(--color-gold-dark);
}

.copy-btn.copied {
  border-color: var(--color-success);
  color: var(--color-success);
}

.fee-toggle {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.fee-toggle input {
  margin-top: 2px;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  accent-color: var(--color-gold);
}

.irpf-block {
  margin-bottom: 20px;
}

.irpf-fields {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  opacity: 0;
}

.irpf-fields.open {
  max-height: 600px;
  opacity: 1;
}

.irpf-info {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 14px;
  padding: 12px 14px;
  background: #f0f7ee;
  border: 1px solid #b6d9b0;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: #2d6a27;
  line-height: 1.5;
}

.irpf-info svg {
  flex-shrink: 0;
  margin-top: 1px;
  color: #2d6a27;
}

.btn-pay {
  width: 100%;
  padding: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  background: var(--color-gold);
  color: white;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(196, 151, 62, 0.35);
}

.btn-pay:hover:not(:disabled) {
  background: var(--color-gold-dark);
  box-shadow: 0 6px 24px rgba(196, 151, 62, 0.45);
  transform: translateY(-1px);
}

.btn-pay .spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn-pay.loading .spinner { display: block; }
.btn-pay.loading .btn-text { display: none; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   Página de gracias
   ============================================================ */
.thanks-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
}

.thanks-card {
  max-width: 520px;
  padding: 56px 40px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.thanks-icon {
  width: 80px;
  height: 80px;
  background: var(--color-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
  animation: pop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes pop {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.thanks-card h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 12px;
}

.thanks-card p {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.thanks-amount {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.thanks-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}

/* ============================================================
   Sección "Sobre el proyecto"
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.gallery-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.gallery-img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.gallery-img-wide {
  grid-column: 1 / -1;
  aspect-ratio: 16 / 7;
  object-position: center 25%;
}

@media (max-width: 600px) {
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about-text h2 {
  margin-bottom: 20px;
}

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  background: #1d1d1f;
  color: rgba(255,255,255,0.6);
  padding: 48px 0 36px;
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.footer-brand {
  font-size: 1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
}

.footer-brand span {
  color: var(--color-gold);
}

.footer-tagline {
  font-size: 0.85rem;
  opacity: 0.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  text-align: center;
  opacity: 0.5;
  font-size: 0.8rem;
}

/* ============================================================
   Páginas legales (aviso legal, política de privacidad)
   ============================================================ */
.legal-content {
  max-width: 740px;
  margin: 0 auto;
  line-height: 1.8;
}

.legal-content h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 40px 0 12px;
  color: var(--color-text);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.legal-content ul,
.legal-content ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.legal-content li {
  margin-bottom: 6px;
}

.legal-content a {
  color: var(--color-gold-dark);
  text-decoration: underline;
}

.legal-content a:hover {
  color: var(--color-gold);
}

.legal-updated {
  margin-top: 48px;
  font-size: 0.82rem !important;
  color: #aaa !important;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

@media (max-width: 600px) {
  .legal-content {
    padding: 0 8px;
  }
  .page-header h1 {
    font-size: 2rem;
  }
}

.legal-footer {
  background: #1d1d1f;
  color: rgba(255,255,255,0.45);
  padding: 20px 0;
  text-align: center;
  font-size: 0.78rem;
}

.legal-footer a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}

.legal-footer a:hover {
  color: rgba(255,255,255,0.8);
}

/* ============================================================
   Header interior (páginas internas)
   ============================================================ */
.page-header {
  padding: 80px 0 40px;
  text-align: center;
}

.page-header h1 {
  margin-bottom: 12px;
}

.page-header p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--color-gold);
}

/* ============================================================
   Animaciones de entrada (scroll)
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .section { padding: 64px 0; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-img-placeholder {
    max-width: 400px;
    margin: 0 auto;
  }

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

  .donation-card {
    flex-wrap: wrap;
  }

  .donation-card-info { flex: 1 1 calc(100% - 76px); }

  .progress-stats {
    gap: 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .thanks-card {
    padding: 40px 24px;
  }
}

@media (max-width: 390px) {
  .navbar-logo {
    font-size: 0.82rem;
  }
  .navbar-cta {
    padding: 7px 12px;
    font-size: 0.82rem;
  }
}

@media (max-width: 480px) {
  .materials-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .material-card { padding: 20px 16px; }

  .sticky-total-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .sticky-total-inner .btn { width: 100%; }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero h1 span {
    white-space: normal;
  }
}