/* styles.css */

/* Color palette */
:root {
  --gray-50:  #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --red-700: #B91C1C;
  --red-400: #F87171;
  --red-500: #EF4444;
}

/* Base resets & typography */
html {
  font-family: system-ui, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  -webkit-font-smoothing: antialiased;
}
html.dark {
  background: var(--gray-900);
  color: var(--gray-100);
}
*::selection {
  background: var(--red-700);
  color: #fff;
}
main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  width: 100%;
  padding: 2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
@media (min-width:1024px) {
  header { padding: 2rem 3.5rem; }
}
header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}
.company-name {
  color: var(--red-700);
}
html.dark .company-name {
  color: var(--red-400);
}
nav {
  display: none;
}
@media (min-width:640px) {
  nav {
    display: flex;
    align-items: center;
    gap: 2rem;
    font-size: 0.875rem;
  }
}
nav a {
  text-decoration: none;
  color: inherit;
}
nav a:hover {
  text-decoration: underline;
}
#dark-toggle {
  padding: 0.5rem;
  border: 1px solid transparent;
  border-radius: 0.375rem;
  background: none;
  cursor: pointer;
  transition: border-color 0.2s ease;
}
#dark-toggle:hover {
  border-color: var(--gray-300);
}
html.dark #dark-toggle:hover {
  border-color: var(--gray-600);
}
.icon-sun, .icon-moon {
  display: inline;
  vertical-align: middle;
}

/* Overlays */
.overlay-light,
.overlay-dark {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.overlay-light {
  background: radial-gradient(circle at top left,
    rgba(254,242,242,0.6),
    transparent,
    transparent);
}
html.dark .overlay-light {
  display: none;
}
.overlay-dark {
  background: linear-gradient(to bottom right,
    rgba(127,29,29,0.1),
    transparent,
    transparent);
  display: none;
}
html.dark .overlay-dark {
  display: block;
}

/* Fade-up animation */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero */
.hero {
  position: relative;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 8rem 1.5rem;
  overflow: hidden;
}
@media (min-width:1024px) {
  .hero { padding: 8rem 3.5rem; }
}
.hero-content h2 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 2rem;
}
.highlight {
  color: var(--red-700);
}
html.dark .highlight {
  color: var(--red-400);
}
.hero-content p {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: 2.5rem;
}
html.dark .hero-content p {
  color: var(--gray-300);
}

/* Why section */
.why {
  padding: 6rem 1.5rem;
  background: var(--gray-50);
}
html.dark .why {
  background: rgba(31,41,55,0.4);
}
@media (min-width:1024px) {
  .why { padding: 6rem 3.5rem; }
}
.why .container {
  max-width: 56rem;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.why h3 {
  font-size: 1.875rem;
  font-weight: 700;
}
.why p {
  font-size: 1.125rem;
  line-height: 1.75rem;
  color: var(--gray-700);
}
html.dark .why p {
  color: var(--gray-200);
}

/* Benefits */
.benefits {
  padding: 6rem 1.5rem;
}
@media (min-width:1024px) {
  .benefits { padding: 6rem 3.5rem; }
}
.benefits .grid {
  max-width: 72rem;
  margin: 0 auto;
  display: grid;
  gap: 4rem;
  grid-template-columns: 1fr;
}
@media (min-width:768px) {
  .benefits .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.benefit-item {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.benefit-item h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--red-700);
}
html.dark .benefit-item h4 {
  color: var(--red-400);
}
.benefit-item p {
  font-size: 1rem;
  line-height: 1.75rem;
  color: var(--gray-600);
}
html.dark .benefit-item p {
  color: var(--gray-300);
}
.disclaimer {
  margin-top: 2rem;
  font-size: 0.75rem;
  text-align: center;
  color: var(--gray-400);
}
html.dark .disclaimer {
  color: var(--gray-500);
}

/* Collaboration */
.collab {
  padding: 6rem 1.5rem;
  background: var(--gray-50);
  text-align: center;
}
html.dark .collab {
  background: rgba(31,41,55,0.4);
}
@media (min-width:1024px) {
  .collab { padding: 6rem 3.5rem; }
}
.collab .container {
  max-width: 48rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.collab h3 {
  font-size: 1.875rem;
  font-weight: 700;
}
.collab p {
  font-size: 1.125rem;
  color: var(--gray-700);
}
html.dark .collab p {
  color: var(--gray-200);
}
.contact-btn {
  display: inline-block;
  background: var(--red-700);
  color: #fff;
  font-weight: 500;
  padding: 0.75rem 2.5rem;
  border-radius: 1rem;
  text-decoration: none;
  box-shadow: 0 10px 15px rgba(0,0,0,0.1);
  transition: box-shadow 0.2s ease;
}
html.dark .contact-btn {
  background: var(--red-500);
}
.contact-btn:hover {
  box-shadow: 0 15px 20px rgba(0,0,0,0.15);
}

/* Footer */
footer {
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--gray-500);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
@media (min-width:1024px) {
  footer { padding: 2.5rem 3.5rem; }
}
html.dark footer {
  color: var(--gray-400);
}