/* ============================================================
   main.css — Shared styles for Infomatrices + Solven
   ============================================================ */

/* ── Design Tokens ── */
:root {
  --color-primary:      #3B82F6;
  --color-primary-dark: #2563EB;
  --color-dark:         #1D1D1F;
  --color-gray:         #6B7280;
  --color-light-gray:   #F3F4F6;
  --color-bg:           #F9FAFB;
  --color-white:        #FFFFFF;
  --color-success:      #10B981;
  --color-danger:       #EF4444;
  --radius:             12px;
  --shadow-sm:          0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md:          0 4px 16px rgba(0, 0, 0, 0.10);
  --shadow-lg:          0 8px 32px rgba(0, 0, 0, 0.12);
  --transition:         all 0.2s ease;
  --font:               'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --nav-height:         64px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--color-bg);
  color: var(--color-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: var(--font);
  border: none;
  background: none;
}

input {
  font-family: var(--font);
}

/* ── Utility: Container ── */
.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* ── Utility: Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.15s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.25s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.35s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.45s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.55s; opacity: 1; transform: none; }

/* ── Shared Button Styles ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-dark);
  border: 2px solid #D1D5DB;
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

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

.btn-outline-amber:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-disabled {
  opacity: 0.45;
  pointer-events: none;
  border: 2px solid #D1D5DB;
  color: var(--color-gray);
}

/* ── NAVBAR ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  background-color: transparent;
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: 24px;
}

.nav-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-logo-img {
  height: 52px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-gray);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-dark);
}

.nav-cta {
  padding: 9px 20px;
  font-size: 0.875rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: 999;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s ease;
}

.mobile-nav.open {
  max-height: 400px;
}

.mobile-nav-inner {
  padding: 20px 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-inner a {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-dark);
  border-bottom: 1px solid var(--color-light-gray);
  transition: var(--transition);
}

.mobile-nav-inner a:hover {
  color: var(--color-primary);
}

.mobile-nav-inner .btn {
  margin-top: 16px;
  width: 100%;
}

/* ── FOOTER ── */
.footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 64px;
  padding-bottom: 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.65;
  max-width: 240px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.footer-social a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.footer-col ul a:hover {
  color: var(--color-primary);
}

.footer-col .coming-soon-text {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
  font-style: italic;
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8375rem;
  color: rgba(255, 255, 255, 0.4);
  flex-wrap: wrap;
  gap: 8px;
}

/* ── Section Shared ── */
.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-headline {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.section-sub {
  font-size: 1.0625rem;
  color: var(--color-gray);
  line-height: 1.7;
  max-width: 600px;
}

/* ── Responsive: Navbar ── */
@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }
}

/* ── Accessibility: visually hidden ── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Responsive: Footer ── */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 540px) {
  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}