/* ═══ RESET & BASE ═══ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary:    #2D6A4F;
  --color-accent:     #74C69D;
  --color-accent-light: #B7E4C7;
  --color-bg:         #F8F4EF;
  --color-bg-card:    #FFFFFF;
  --color-text:       #1B1B1B;
  --color-text-muted: #6B7280;
  --color-sand:       #D4A574;
  --color-danger:     #EF4444;

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --shadow:     0 2px 16px rgba(0,0,0,0.08);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.12);

  --font-main: 'Inter', -apple-system, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 40px;
}

/* ═══ TYPOGRAPHY ═══ */
h1 { font-size: 2rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 1.5rem; font-weight: 700; line-height: 1.3; }
h3 { font-size: 1.1rem; font-weight: 600; }
p  { color: var(--color-text-muted); }

.section-title {
  text-align: center;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-subtitle {
  text-align: center;
  margin-bottom: 32px;
}

/* ═══ BUTTONS ═══ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  text-align: center;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:active {
  background: #1f4d38;
  transform: scale(0.98);
}

.btn--secondary {
  background: var(--color-accent-light);
  color: var(--color-primary);
}

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

.btn--large {
  padding: 18px 32px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

/* ═══ SECTIONS ═══ */
section {
  padding: 48px 20px;
}

section:nth-child(even) {
  background: #fff;
}

/* ═══ HERO ═══ */
.hero {
  text-align: center;
  padding: 60px 24px 48px;
  background: linear-gradient(
    160deg,
    var(--color-primary) 0%,
    #40916C 100%
  );
  color: #fff;
}

.hero__logo {
  font-size: 3rem;
  margin-bottom: 16px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

.hero__title {
  color: #fff;
  margin-bottom: 16px;
  font-size: 2.2rem;
}

.hero__subtitle {
  color: rgba(255,255,255,0.85);
  margin-bottom: 24px;
  font-size: 1.05rem;
}

.hero__tags {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.tag {
  background: rgba(255,255,255,0.2);
  color: #fff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.hero .btn--primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  max-width: 320px;
  margin: 0 auto;
}

/* ═══ PROBLEMS ═══ */
.problems__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.problem-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
}

.problem-card__icon {
  font-size: 1.8rem;
  display: block;
  margin-bottom: 8px;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--color-text);
}

/* ═══ HOW IT WORKS ═══ */
.steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 20px;
}

.step__icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 48px;
  text-align: center;
}

.step__content h3 {
  margin-bottom: 4px;
  color: var(--color-primary);
}

/* ═══ SCIENCE ═══ */
.science {
  background: var(--color-primary) !important;
  color: #fff;
}

.science .section-title {
  color: #fff;
}

.science__cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.science-card {
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.science-card__num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  min-width: 72px;
}

.science-card p {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
}

/* ═══ PRICING ═══ */
.plans {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 8px;
}

.plan {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  position: relative;
  border: 2px solid transparent;
}

.plan--pro {
  border-color: var(--color-primary);
}

.plan__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}

.plan__name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.plan__price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.plan__price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.plan__features {
  list-style: none;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.plan__features li {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* ═══ FAQ ═══ */
.faq__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}

.faq__item {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.faq__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--color-text);
}

.faq__arrow {
  transition: transform 0.2s;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.faq__item.open .faq__arrow {
  transform: rotate(180deg);
}

.faq__answer {
  display: none;
  margin-top: 12px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.faq__item.open .faq__answer {
  display: block;
}

/* ═══ FINAL CTA ═══ */
.final-cta {
  text-align: center;
  padding: 60px 24px;
  background: linear-gradient(
    160deg,
    #40916C 0%,
    var(--color-primary) 100%
  ) !important;
}

.final-cta__icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.final-cta h2 {
  color: #fff;
  font-size: 2rem;
  margin-bottom: 12px;
}

.final-cta p {
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
}

.final-cta .btn--primary {
  background: #fff;
  color: var(--color-primary);
  max-width: 320px;
  margin: 0 auto 16px;
  box-shadow: var(--shadow-lg);
}

.final-cta__note {
  color: rgba(255,255,255,0.7) !important;
  font-size: 0.85rem;
}

/* ═══ FOOTER ═══ */
.footer {
  text-align: center;
  padding: 32px 24px;
  background: #1B1B1B !important;
}

.footer__logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.footer__tagline {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.footer__links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.footer__links a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__disclaimer {
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
  margin-bottom: 12px;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.footer__copy {
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
}

/* ═══ ANIMATIONS ═══ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero,
.problems,
.how,
.science,
.pricing,
.faq,
.final-cta {
  animation: fadeInUp 0.5s ease both;
}

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  border-radius: 2px;
}

/* ═══ SAFE AREA (iPhone notch) ═══ */
body {
  padding-bottom: calc(40px + env(safe-area-inset-bottom));
}