/* ================================================
   Design Tokens
================================================ */
:root {
  --color-primary:                #00152a;
  --color-primary-container:      #102a43;
  --color-on-primary-container:   #7a92b0;
  --color-secondary:              #006d2f;
  --color-secondary-container:    #5dfd8a;
  --color-on-secondary-container: #007232;
  --color-secondary-fixed:        #66ff8e;
  --color-secondary-fixed-dim:    #3de273;
  --color-background:             #f7f9fb;
  --color-surface-bright:         #f7f9fb;
  --color-surface-container:      #eceef0;
  --color-on-surface:             #191c1e;
  --color-on-surface-variant:     #43474d;
  --color-outline-variant:        #c3c6ce;

  --font-headline: 'Plus Jakarta Sans', sans-serif;
  --font-body:     'Inter', sans-serif;
}

/* ================================================
   Keyframes
================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes reveal {
  from { transform: scale(1.1); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-20px); }
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-background);
  color: var(--color-on-surface);
  overflow-x: hidden;
}

::selection {
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ================================================
   Scroll-reveal Animations
================================================ */
.reveal-on-scroll {
  opacity: 0;
}

.reveal-on-scroll.active {
  animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.reveal-on-scroll.delay-200.active {
  animation-delay: 0.2s;
}

.reveal-fade-up {
  animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.reveal-reveal {
  animation: reveal 1.2s cubic-bezier(0.77, 0, 0.175, 1) forwards;
}

/* ================================================
   Scroll Snap Layout
================================================ */
.main-content {
  height: 100vh;
  overflow-y: scroll;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
}

.section {
  height: 100vh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* ================================================
   Site Header
================================================ */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 12px 32px rgba(25, 28, 30, 0.06);
  transition: padding 0.3s ease, border-color 0.3s ease;
}

.site-header--scrolled {
  border-bottom: 1px solid #e2e8f0;
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 1rem 2rem;
  max-width: 1536px;
  margin: 0 auto;
}

.site-logo {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-container);
  letter-spacing: -0.05em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 2.5rem;
}

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

.nav-link {
  font-family: var(--font-headline);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #64748b;
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: var(--color-primary-container);
}

.nav-link--active {
  color: var(--color-secondary);
  border-bottom: 2px solid var(--color-secondary);
  padding-bottom: 0.25rem;
}

/* ================================================
   Buttons
================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  border: none;
  cursor: pointer;
  font-family: var(--font-headline);
  font-weight: 800;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn:active { transform: scale(0.95); }

.btn--nav-cta {
  padding: 0.625rem 2rem;
  background-color: var(--color-primary-container);
  color: #fff;
  border-radius: 9999px;
  font-weight: 700;
}

.btn--primary {
  padding: 1.25rem 3rem;
  background-color: var(--color-primary);
  color: #fff;
  border-radius: 1rem;
  font-size: 1.25rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.btn--primary:hover {
  box-shadow: 0 25px 50px -12px rgba(61, 226, 115, 0.2);
}

.btn--ghost {
  padding: 1.25rem 3rem;
  background-color: var(--color-surface-container);
  color: var(--color-on-surface);
  border-radius: 1rem;
  font-size: 1.25rem;
}

.btn--cta-primary {
  padding: 1.25rem 3rem;
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  border-radius: 1rem;
  font-size: 1.25rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.btn--cta-primary:hover {
  background-color: var(--color-secondary-fixed);
}

.btn--cta-ghost {
  padding: 1.25rem 3rem;
  background-color: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-radius: 1rem;
  font-size: 1.25rem;
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn--cta-ghost:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.btn--modal-submit {
  width: 100%;
  padding: 1rem;
  background-color: var(--color-secondary);
  color: #fff;
  border-radius: 0.75rem;
  font-size: 1rem;
}

.btn--modal-submit:hover {
  background-color: rgba(0, 109, 47, 0.9);
}

/* ================================================
   Section Layout Helpers
================================================ */
.section__inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

.section__inner--hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section__inner--feature {
  display: grid;
  gap: 5rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .section__inner--feature { grid-template-columns: 1fr 1fr; }
}

.section__inner--cta {
  max-width: 64rem;
}

/* ================================================
   Hero Section
================================================ */
.section--hero {
  background-color: #fff;
}

.hero-badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  margin-bottom: 2rem;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  background-color: rgba(93, 253, 138, 0.3);
  border-radius: 9999px;
}

.hero-title {
  font-family: var(--font-headline);
  font-size: clamp(3.5rem, 8vw, 5rem);
  font-weight: 900;
  color: var(--color-primary-container);
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 2rem;
}

.hero-title__accent {
  color: var(--color-secondary);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-on-surface-variant);
  max-width: 36rem;
  margin: 0 auto 3rem;
  font-weight: 500;
  opacity: 0.8;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .hero-actions { flex-direction: row; }
}

.hero-image-wrapper {
  margin-top: 5rem;
  position: relative;
  width: 100%;
  max-width: 64rem;
}

.hero-image-gradient {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8rem;
  background: linear-gradient(to top, #fff, transparent);
  z-index: 10;
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: 3rem;
  box-shadow: 0 40px 100px -15px rgba(0, 109, 47, 0.15);
  animation: float 6s ease-in-out infinite;
}

/* ================================================
   Feature Sections
================================================ */
.section--dark  { background-color: var(--color-primary-container); }
.section--light { background-color: #fff; }

.feature-content { /* no extra styles needed */ }

.feature-content--swap { order: 1; }

@media (min-width: 1024px) {
  .feature-content--swap { order: 2; }
}

.feature-title {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--color-primary-container);
}

.feature-title--light           { color: #fff; }
.feature-title__accent--green   { color: var(--color-secondary-fixed-dim); }
.feature-title__accent--secondary { color: var(--color-secondary); }

.feature-description {
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  margin-bottom: 2.5rem;
  line-height: 1.7;
  max-width: 28rem;
}

.feature-description--light { color: rgba(255, 255, 255, 0.6); }

.feature-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: #fff;
  font-family: var(--font-headline);
  font-weight: 700;
  cursor: pointer;
}

.feature-link--dark { color: var(--color-primary); }

.feature-link__line {
  display: block;
  width: 3rem;
  height: 2px;
  background-color: var(--color-secondary-fixed-dim);
  transition: width 0.5s ease;
}

.feature-link:hover .feature-link__line { width: 5rem; }

.feature-link__line--dark { background-color: var(--color-primary); }

.feature-image {
  border-radius: 2.5rem;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.feature-image--grayscale {
  filter: grayscale(1);
  transition: filter 0.7s ease;
}

.feature-image--grayscale:hover { filter: grayscale(0); }

.feature-image-col {
  order: 2;
}

@media (min-width: 1024px) {
  .feature-image-col { order: 1; }
}

.feature-image-container {
  position: relative;
}

.feature-stat {
  position: absolute;
  bottom: -2rem;
  right: -2rem;
  background-color: var(--color-primary);
  padding: 2rem;
  border-radius: 1.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  color: #fff;
}

.feature-stat__number {
  font-family: var(--font-headline);
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 0.25rem;
}

.feature-stat__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.6;
}

/* ================================================
   CTA Section
================================================ */
.section--cta-bg { background-color: var(--color-background); }

.cta-card {
  background-color: var(--color-primary);
  border-radius: 3rem;
  padding: 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .cta-card { padding: 6rem; }
}

.cta-card__glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(61, 226, 115, 0.133) 0%, transparent 50%);
}

.cta-card__content {
  position: relative;
  z-index: 10;
}

.cta-title {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 2rem;
  letter-spacing: -0.05em;
}

.cta-description {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 3rem;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .cta-actions { flex-direction: row; }
}

/* ================================================
   Footer
================================================ */
.site-footer {
  scroll-snap-align: start;
  width: 100%;
  padding: 3rem 2rem;
  background-color: var(--color-surface-bright);
}

.footer-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-logo {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-container);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2.5rem;
}

.footer-link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 300;
  color: #64748b;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover { color: #10b981; }

.footer-copyright {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 300;
  color: #64748b;
}

/* ================================================
   Modal
================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background-color: rgba(0, 21, 42, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal--visible { display: flex; }
.modal--open    { opacity: 1; }

.modal__content {
  background-color: #fff;
  padding: 2rem;
  border-radius: 2rem;
  max-width: 28rem;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal--open .modal__content { transform: scale(1); }

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.modal__title {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-primary);
}

.modal__close {
  background: none;
  border: none;
  cursor: pointer;
  color: #94a3b8;
  transition: color 0.2s ease;
}

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

.modal__body {
  color: var(--color-on-surface-variant);
  margin-bottom: 2rem;
}

.modal__form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal__input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-outline-variant);
  background-color: var(--color-surface-container);
  outline: none;
  font-family: var(--font-body);
  transition: box-shadow 0.2s ease;
}

.modal__input:focus {
  box-shadow: 0 0 0 2px var(--color-secondary);
}