/* Green Units — mobile-first, green palette */
:root {
  --green-950: #052e16;
  --green-900: #064e2b;
  --green-800: #065f46;
  --green-700: #047857;
  --green-600: #059669;
  --green-500: #10b981;
  --green-400: #34d399;
  --green-100: #d1fae5;
  --green-50: #ecfdf5;
  --white: #ffffff;
  --ink: #0f172a;
  --ink-muted: #475569;
  --border: rgba(5, 46, 22, 0.12);
  --shadow: 0 18px 50px rgba(5, 46, 22, 0.12);
  --shadow-soft: 0 10px 30px rgba(5, 46, 22, 0.08);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --header-h: 64px;
  --wa-green: #25d366;
  --wa-green-dark: #128c7e;
  --max: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .recycle-icon,
  .spinner,
  .scroll-hint svg,
  .btn {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--green-50);
}

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

a {
  color: var(--green-800);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.75rem;
  z-index: 1000;
  padding: 0.5rem 1rem;
  background: var(--white);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  left: 0.75rem;
  outline: 3px solid var(--green-400);
}

.container {
  width: min(100% - 1.5rem, var(--max));
  margin-inline: auto;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--green-50) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 1.5rem, var(--max));
  margin-inline: auto;
  min-height: var(--header-h);
  padding-block: 0.35rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--green-950);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-icon {
  color: var(--green-600);
}

.nav {
  display: none;
  gap: 0.25rem;
}

.nav-link {
  text-decoration: none;
  color: var(--ink-muted);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-full);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--green-900);
  background: color-mix(in srgb, var(--green-500) 14%, transparent);
  outline: none;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--white);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin-inline: auto;
  background: var(--green-900);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--green-50) 95%, var(--white));
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav-link {
  text-decoration: none;
  color: var(--green-950);
  font-weight: 700;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  transition: background 0.2s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link:focus-visible {
  background: var(--white);
  outline: none;
}

@media (min-width: 880px) {
  .nav {
    display: flex;
  }
  .nav-toggle {
    display: none;
  }
  .mobile-nav {
    display: none !important;
  }
}

/* —— Hero —— */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2.5rem, 8vw, 5rem) 0 clamp(3rem, 10vw, 5.5rem);
  background: linear-gradient(165deg, var(--green-900) 0%, var(--green-700) 42%, var(--green-600) 100%);
  color: var(--white);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.35;
}

.hero-orb--1 {
  width: min(70vw, 420px);
  height: min(70vw, 420px);
  background: var(--green-400);
  top: -18%;
  right: -10%;
}

.hero-orb--2 {
  width: min(55vw, 320px);
  height: min(55vw, 320px);
  background: #6ee7b7;
  bottom: -20%;
  left: -15%;
}

.hero-icons {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.9;
}

.recycle-icon {
  position: absolute;
  color: color-mix(in srgb, var(--white) 55%, transparent);
  animation: float 7s ease-in-out infinite;
}

.recycle-icon--1 {
  top: 12%;
  left: 8%;
  animation-delay: 0s;
}

.recycle-icon--2 {
  top: 22%;
  right: 10%;
  animation-delay: 1.2s;
}

.recycle-icon--3 {
  bottom: 18%;
  right: 18%;
  animation-delay: 2.4s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-10px) rotate(4deg);
  }
}

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 40rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--white) 78%, transparent);
}

.hero-title {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 6vw, 2.85rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  margin: 0 0 1rem;
  font-size: clamp(1.05rem, 3.2vw, 1.2rem);
  color: color-mix(in srgb, var(--white) 92%, transparent);
}

.hero-desc {
  margin: 0;
  font-size: 0.98rem;
  color: color-mix(in srgb, var(--white) 82%, transparent);
}

.scroll-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 2rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  color: var(--green-950);
  background: var(--white);
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scroll-hint:hover,
.scroll-hint:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  outline: none;
}

.scroll-hint svg {
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(4px);
  }
}

/* —— Sections —— */
.section {
  padding: clamp(2.75rem, 7vw, 4.5rem) 0;
}

.section-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--green-950);
  letter-spacing: -0.02em;
  text-align: center;
}

.section-lead {
  margin: 0 auto 2rem;
  max-width: 36rem;
  text-align: center;
  color: var(--ink-muted);
  font-size: 1rem;
}

/* —— CTA buttons —— */
.cta-grid {
  display: grid;
  gap: 1rem;
  max-width: 28rem;
  margin-inline: auto;
}

@media (min-width: 640px) {
  .cta-grid {
    max-width: 520px;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

.btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 120px;
  padding: 1.25rem 1.5rem;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease,
    background 0.22s ease;
  box-shadow: var(--shadow-soft);
}

.btn:active {
  transform: scale(0.98);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-label {
  font-size: 1.05rem;
}

.btn-hint {
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0.85;
}

.btn-form {
  background: var(--white);
  color: var(--green-900);
  border: 2px solid var(--green-500);
}

.btn-form:hover,
.btn-form:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--green-600);
  outline: none;
}

.btn-whatsapp {
  background: linear-gradient(145deg, var(--wa-green) 0%, var(--wa-green-dark) 100%);
  color: var(--white);
  border: 2px solid transparent;
}

.btn-whatsapp:hover,
.btn-whatsapp:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(37, 211, 102, 0.35);
  outline: none;
}

.btn-icon--wa {
  color: var(--white);
}

/* —— Google Form iframe —— */
.iframe-shell {
  position: relative;
  margin-inline: auto;
  max-width: 720px;
}

.iframe-wrap {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.iframe-wrap iframe {
  display: block;
  width: 100%;
  max-width: 100%;
  height: min(1628px, 85vh);
  min-height: 520px;
  border: 0;
}

@media (min-width: 768px) {
  .iframe-wrap iframe {
    min-height: 720px;
    height: 1628px;
  }
}

.iframe-spinner {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: color-mix(in srgb, var(--green-50) 92%, var(--white));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.iframe-spinner.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.spinner {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 3px solid color-mix(in srgb, var(--green-500) 35%, transparent);
  border-top-color: var(--green-600);
  animation: spin 0.85s linear infinite;
}

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

.spinner-text {
  font-weight: 700;
  color: var(--green-900);
  font-size: 0.95rem;
}

/* —— How it works —— */
.how {
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--green-100) 45%, transparent));
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 600px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.step-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  background: var(--green-100);
  color: var(--green-900);
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 0.65rem;
}

.step-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: var(--green-950);
}

.step-text {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-muted);
}

/* —— Footer —— */
.footer {
  background: var(--green-950);
  color: color-mix(in srgb, var(--white) 88%, transparent);
  padding: 2.5rem 0 1.25rem;
}

.footer-inner {
  display: grid;
  gap: 1.75rem;
  text-align: center;
}

@media (min-width: 720px) {
  .footer-inner {
    grid-template-columns: 2fr 1fr 1fr;
    align-items: start;
    text-align: left;
  }
}

.footer-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--white);
}

.footer-tag {
  margin: 0.35rem 0 0.5rem;
  font-weight: 600;
  color: var(--green-400);
}

.footer-mission {
  margin: 0;
  font-size: 0.95rem;
  max-width: 28rem;
  margin-inline: auto;
}

@media (min-width: 720px) {
  .footer-mission {
    margin-inline: 0;
  }
}

.footer-label {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: color-mix(in srgb, var(--white) 55%, transparent);
}

.footer-phone {
  color: var(--white);
  font-weight: 800;
  font-size: 1.1rem;
  text-decoration: none;
}

.footer-phone:hover,
.footer-phone:focus-visible {
  text-decoration: underline;
  outline: none;
}

.footer-social {
  display: flex;
  gap: 0.65rem;
  justify-content: center;
}

@media (min-width: 720px) {
  .footer-social {
    justify-content: flex-end;
  }
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--white) 10%, transparent);
  color: var(--white);
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease;
}

.social-link:hover,
.social-link:focus-visible {
  transform: translateY(-2px);
  background: color-mix(in srgb, var(--white) 18%, transparent);
  outline: none;
}

.footer-copy {
  margin: 2rem 0 0;
  text-align: center;
  font-size: 0.8rem;
  color: color-mix(in srgb, var(--white) 45%, transparent);
}