/* ============================================
   Refugio de Aves — Estilos
   ============================================ */

:root {
  --color-primary: #2d6a4f;
  --color-primary-dark: #1b4332;
  --color-primary-light: #40916c;
  --color-accent: #d4a373;
  --color-accent-light: #e9c46a;
  --color-bg: #faf9f6;
  --color-bg-alt: #f0ede6;
  --color-text: #1a1a1a;
  --color-text-muted: #5c5c5c;
  --color-white: #ffffff;
  --color-border: #e0ddd6;
  --color-success: #2d6a4f;
  --color-error: #c1121f;

  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-display: 'Fraunces', Georgia, serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);

  --header-height: 72px;
  --transition: 0.25s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- HEADER ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.header--scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}

.logo__img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary-dark);
  background: rgba(45, 106, 79, 0.08);
}

.nav__link--cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
}

.nav__link--cta:hover {
  background: var(--color-primary-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-white);
}

.btn--full {
  width: 100%;
}

.btn--bizum .btn__icon {
  font-size: 1.25rem;
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 3rem) 0 4rem;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to right,
      rgba(27, 67, 50, 0.9) 0%,
      rgba(27, 67, 50, 0.72) 42%,
      rgba(45, 106, 79, 0.45) 100%
    ),
    url('../assets/images/hero-bg.png') center/cover no-repeat;
  z-index: -1;
}

.hero__content {
  color: var(--color-white);
  max-width: 680px;
}

.hero__badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero__subtitle {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.hero__bizum-hint {
  font-size: 0.9375rem;
  opacity: 0.8;
}

.hero__bizum-hint strong {
  font-weight: 600;
}

/* ---- STATS ---- */
.stats {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 2.5rem 0;
  margin-top: -2rem;
  position: relative;
  z-index: 1;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stat__number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat__label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ---- SECTIONS ---- */
.section {
  padding: 5rem 0;
}

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

.section__header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.section__tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}

.section__desc {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

/* ---- ABOUT ---- */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.0625rem;
}

.about__values {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about__values li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.about__value-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45, 106, 79, 0.1);
  border-radius: var(--radius-md);
}

.about__values strong {
  display: block;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}

.about__values p {
  font-size: 0.9375rem;
  margin: 0;
}

.about__visual {
  position: relative;
  height: 400px;
}

.about__card {
  position: absolute;
  border-radius: var(--radius-lg);
  background-size: cover;
  background-position: center;
}

.about__card--1 {
  width: 70%;
  height: 75%;
  top: 0;
  right: 0;
  background-image: url('../assets/images/hero-aves.png');
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--color-white);
}

.about__card--2 {
  width: 55%;
  height: 50%;
  bottom: 0;
  left: 0;
  background-image: url('../assets/images/logo-refugio.png');
  box-shadow: var(--shadow-md);
  border: 4px solid var(--color-white);
}

/* ---- RESCATES ---- */
.filters {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

.filter-btn--active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.rescates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.rescates-loading,
.rescates-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--color-text-muted);
}

.rescate-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.rescate-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.rescate-card__image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}

.rescate-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.rescate-card__image--fallback::after {
  content: '🐦';
  font-size: 4rem;
}

.rescate-card__badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.rescate-card__badge--en_tratamiento {
  background: #fff3cd;
  color: #856404;
}

.rescate-card__badge--recuperado {
  background: #d1ecf1;
  color: #0c5460;
}

.rescate-card__badge--liberado {
  background: #d4edda;
  color: #155724;
}

.rescate-card__body {
  padding: 1.5rem;
}

.rescate-card__species {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.375rem;
}

.rescate-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}

.rescate-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rescate-card__date {
  margin-top: 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ---- COLABORA ---- */
.colabora {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.colabora__donate {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.colabora__banner {
  margin: 0;
  text-align: center;
}

.colabora__banner img {
  width: min(520px, 100%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.donate-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.donate-card__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.donate-card__icon {
  font-size: 2rem;
}

.donate-card h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--color-primary-dark);
}

.donate-card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
}

.donate-card__phone {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 1rem 0 !important;
  letter-spacing: 0.02em;
}

.donate-card__iban {
  font-family: monospace;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg-alt);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  word-break: break-all;
}

.donate-card__note {
  font-size: 0.8125rem !important;
  margin-top: 1rem !important;
  font-style: italic;
}

.donate-card--secondary {
  background: var(--color-bg-alt);
  border-style: dashed;
}

.colabora__ways {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.way-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.way-card__icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

.way-card h4 {
  font-family: var(--font-display);
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}

.way-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.colabora__form-wrapper {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  max-width: 700px;
  margin: 0 auto;
  width: 100%;
}

.colabora__form-wrapper h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}

.colabora__form-wrapper > p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

/* ---- FORM ---- */
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form__group {
  margin-bottom: 1rem;
}

.form__group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
  color: var(--color-text);
}

.form__group input,
.form__group select,
.form__group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.15);
}

.form__group textarea {
  resize: vertical;
  min-height: 100px;
}

.form__feedback {
  margin-top: 1rem;
  font-size: 0.9375rem;
  text-align: center;
  min-height: 1.5rem;
}

.form__feedback--success {
  color: var(--color-success);
}

.form__feedback--error {
  color: var(--color-error);
}

/* ---- FOOTER ---- */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  padding-top: 3rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__brand .logo__img {
  align-self: flex-start;
}

.footer__brand span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
}

.footer h4 {
  color: var(--color-white);
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
}

.footer a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition);
}

.footer a:hover {
  color: var(--color-white);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.875rem;
  opacity: 0.7;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .about {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about__visual {
    height: 280px;
  }

  .colabora__donate {
    grid-template-columns: 1fr;
  }

  .colabora__ways {
    grid-template-columns: 1fr;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    box-shadow: var(--shadow-md);
  }

  .nav--open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .nav__link {
    display: block;
    text-align: center;
    padding: 0.75rem;
  }

  .nav-toggle--active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle--active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle--active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .form__row {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }
}

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

  .stats__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .stat__number {
    font-size: 1.75rem;
  }
}