:root {
  --color-primary: #212529;
  --color-accent: #fab803;
  --color-accent-dark: #d99e00;
  --color-bg: #ffffff;
  --color-surface: #f5f4f0;
  --color-card: #ffffff;
  --color-text: #212529;
  --color-muted: #6c757d;
  --color-danger: #b3261e;
  --color-success: #2f6d3a;
  --color-border: rgba(33, 37, 41, 0.15);
  --radius: 6.4px;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  --font-heading: "Assistant", "Segoe UI", sans-serif;
  --font-body: "Source Sans Pro", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
}

.navbar {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
}

.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
}

.navbar .logo {
  height: 40px;
  width: auto;
}

.hero {
  text-align: center;
  padding: 64px 20px 48px;
  background: var(--color-primary);
  color: #fff;
}

.hero h1 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.6rem;
  color: var(--color-accent);
}

.hero p {
  margin: 0;
  opacity: 0.9;
  font-size: 1.1rem;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px;
}

.feedback {
  max-width: 600px;
  margin: 0 auto 24px;
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  text-align: center;
}

.feedback.error {
  background: #fdecea;
  color: var(--color-danger);
  border: 1px solid #f5c6c3;
}

.feedback.success {
  background: #fff8e1;
  color: #7a5b00;
  border: 1px solid #ffe08a;
}

.email-field {
  max-width: 420px;
  margin: 0 auto 32px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.email-field label {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.email-field input {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-body);
}

.email-field input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.loading {
  text-align: center;
  padding: 40px;
  color: var(--color-muted);
  grid-column: 1 / -1;
}

.plan-card {
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.plan-card:hover {
  transform: translateY(-4px);
}

.plan-card.selected {
  border-color: var(--color-accent);
  border-width: 2px;
}

.plan-card h2 {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-primary);
}

.plan-card .price {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin: 8px 0 4px;
}

.plan-card .price small {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-muted);
}

.plan-card .description {
  color: var(--color-muted);
  margin-bottom: 16px;
  min-height: 40px;
}

.plan-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  flex: 1;
}

.plan-card ul li {
  padding: 6px 0;
  border-bottom: 1px solid #eee;
  font-size: 0.92rem;
}

.plan-card ul li::before {
  content: "✓ ";
  color: var(--color-accent-dark);
  font-weight: 700;
}

.subscribe-btn {
  background: var(--color-accent);
  color: var(--color-primary);
  border: none;
  padding: 14px 20px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background 0.15s ease, opacity 0.15s ease;
}

.subscribe-btn:hover {
  background: var(--color-accent-dark);
}

.subscribe-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

footer {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.85rem;
}

.footer-logo {
  height: 28px;
  width: auto;
  margin-bottom: 10px;
}

.view-contract-btn {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  margin-bottom: 10px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.view-contract-btn:hover {
  border-color: var(--color-accent-dark);
  background: var(--color-surface);
}

.contract-status {
  font-size: 0.8rem;
  margin: -4px 0 10px;
  min-height: 16px;
  color: var(--color-muted);
}

.contract-status.accepted {
  color: var(--color-success);
  font-weight: 600;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(33, 37, 41, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-box {
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px 28px 24px;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: transparent;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--color-muted);
  cursor: pointer;
  padding: 4px 8px;
}

.modal-close:hover {
  color: var(--color-primary);
}

.contrato-header h2 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--color-primary);
  margin: 0 0 6px;
  padding-right: 24px;
}

.contrato-header p {
  margin: 0 0 18px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.contrato-body {
  max-height: 350px;
  overflow-y: auto;
  padding: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.contrato-body h3 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  font-size: 1.05rem;
  margin: 18px 0 8px;
}

.contrato-body h3:first-child {
  margin-top: 0;
}

.contrato-body p,
.contrato-body li {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--color-text);
}

.contrato-body ul {
  margin: 0 0 12px;
  padding-left: 20px;
}

.box-eco {
  background-color: #f0fff4;
  border: 1px solid #c6f6d5;
  padding: 10px 14px;
  margin: 12px 0;
  border-radius: 4px;
  font-size: 0.9rem;
}

.contrato-footer {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contract-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-primary);
  cursor: pointer;
}

.contract-checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.confirm-contract-btn {
  background: var(--color-accent);
  color: var(--color-primary);
  border: none;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  align-self: flex-end;
  transition: background 0.15s ease, opacity 0.15s ease;
}

.confirm-contract-btn:hover:not(:disabled) {
  background: var(--color-accent-dark);
}

.confirm-contract-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #fdecea;
  color: var(--color-danger);
  border: 1px solid #f5c6c3;
  padding: 14px 22px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 1100;
  max-width: 90vw;
  text-align: center;
}

.toast[hidden] {
  display: none;
}

/* Botão flutuante do WhatsApp */
.whatsapp-button {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25d366;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  z-index: 1200;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.whatsapp-button:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.whatsapp-button[hidden] {
  display: none;
}

@media (max-width: 640px) {
  .whatsapp-button {
    right: 16px;
    bottom: 16px;
    width: 52px;
    height: 52px;
  }
}