/* ============================================================
   Autopasst — style.css
   Mobile-first, pure CSS3, no external frameworks
   ============================================================ */

/* ── Design tokens (T018) ────────────────────────────────────── */

:root {
  /* Colors */
  --color-primary:   #1a1a2e;
  --color-accent:    #e94560;
  --color-surface:   #ffffff;
  --color-text:      #1a1a2e;
  --color-text-inv:  #ffffff;
  --color-muted:     #6b7280;

  /* Spacing */
  --spacing-xs:  0.25rem;
  --spacing-sm:  0.5rem;
  --spacing-md:  1rem;
  --spacing-lg:  2rem;
  --spacing-xl:  4rem;

  /* Typography */
  --font-sans:        system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-size-base:   1rem;
  --font-size-lg:     1.25rem;
  --font-size-xl:     1.75rem;
  --font-size-hero:   clamp(2rem, 5vw, 3.5rem);

  /* Layout */
  --container-max: 1100px;
  --header-height: 60px;
  --radius-btn:    6px;
}

/* ── CSS Reset (T018) ────────────────────────────────────────── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Base (T018) ─────────────────────────────────────────────── */

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* ── Layout container ────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--spacing-md);
}

/* ── Header (T023) ───────────────────────────────────────────── */

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-primary);
  color: var(--color-text-inv);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding-inline: var(--spacing-md);
}

.brand {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-inv);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

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

.header-logo {
  display: block;
  height: 56px;
  width: auto;
  max-width: 240px;
  object-fit: contain;
}

.hero-logo {
  display: block;
  height: 200px;
  width: auto;
  max-width: 650px;
  object-fit: contain;
  align-self: center;
  margin: 0 auto var(--spacing-lg);
}

/* ── Hamburger toggle (T040) ─────────────────────────────────── */

/* Hide the real checkbox */
.nav-toggle {
  display: none;
}

/* Hamburger icon — three bars */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  flex-shrink: 0;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-inv);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* CSS-only open state — bars animate into × */
.nav-toggle:checked ~ .nav-hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle:checked ~ .nav-hamburger span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle:checked ~ .nav-hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Nav links (T035 / T037) — hidden on mobile, shown in hamburger menu */
.nav-menu {
  display: none;
}

/* Mobile nav-menu dropdown when checkbox is checked */
.nav-toggle:checked ~ .nav-menu {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-primary);
  padding: var(--spacing-lg);
  gap: var(--spacing-sm);
  z-index: 9999;
  overflow-y: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Lock body scroll when mobile menu is open */
body:has(.nav-toggle:checked) {
  overflow: hidden;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-inv);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-btn);
  transition: color 0.2s ease, background-color 0.2s ease;
}

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

/* Language switcher — now lives inside .nav-menu */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  /* Mobile: visual separator from nav links above */
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.lang-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-inv);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-btn);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.lang-link:hover {
  color: var(--color-accent);
}

.lang-link.active {
  font-weight: 700;
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

/* ── Hero section (T024) — mobile-first ─────────────────────── */

#hero {
  min-height: 55dvh;
  background-color: var(--color-primary);
  color: var(--color-text-inv);
  display: flex;
  align-items: center;
  padding-block: var(--spacing-lg);
}

#hero .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

#hero h1 {
  font-size: var(--font-size-hero);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.85);
  max-width: 52ch;
}

/* ── Scroll animations (pre-wired; JS adds .is-visible in T042) */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease var(--anim-delay, 0s),
              transform 0.55s ease var(--anim-delay, 0s);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Selling section ─────────────────────────────────────────── */

#selling {
  background-color: var(--color-surface);
  padding-block: var(--spacing-xl);
}

#selling .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

#selling h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.selling-body {
  font-size: var(--font-size-lg);
  color: var(--color-muted);
  max-width: 60ch;
}

/* ── Features section ────────────────────────────────────────── */

#features {
  background-color: var(--color-primary);
  color: var(--color-text-inv);
  padding-block: var(--spacing-xl);
}

#features .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

#features h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
}

.features-sub {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  max-width: 60ch;
  margin-inline: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-sm);
}

.feature-card {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

/* Staggered entrance delays */
.feature-card:nth-child(1) { --anim-delay: 0s; }
.feature-card:nth-child(2) { --anim-delay: 0.1s; }
.feature-card:nth-child(3) { --anim-delay: 0.2s; }
.feature-card:nth-child(4) { --anim-delay: 0.3s; }

.feature-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background-color: rgba(233, 69, 96, 0.18);
  border: 1px solid rgba(233, 69, 96, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  transition: background-color 0.2s ease;
}

.feature-card:hover .feature-icon {
  background-color: rgba(233, 69, 96, 0.32);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-text h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.feature-text p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* ── How it works section ────────────────────────────────────── */

#steps {
  background-color: #f4f5f7;
  padding-block: var(--spacing-xl);
}

#steps .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

#steps h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  text-align: center;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.step {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

/* Staggered entrance delays */
.step:nth-child(1) { --anim-delay: 0s; }
.step:nth-child(2) { --anim-delay: 0.15s; }
.step:nth-child(3) { --anim-delay: 0.3s; }

.step-num {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-text-inv);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.step-text h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  padding-top: 0.4rem; /* vertically align with number circle */
}

.step-text p {
  color: var(--color-muted);
  line-height: 1.6;
}

/* ── Trade-in section (T030) — mobile-first ─────────────────── */

#tradein {
  background-color: var(--color-surface);
  padding-block: var(--spacing-xl);
}

#tradein .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

#tradein h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.tradein-body {
  font-size: var(--font-size-lg);
  color: var(--color-muted);
  max-width: 60ch;
}

/* ── Primary CTA button (T031) ───────────────────────────────── */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-accent);
  color: var(--color-text-inv);
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--radius-btn);
  cursor: pointer;
  align-self: flex-start;
  transition: filter 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  filter: brightness(1.1);
  transform: translateY(-2px);
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  color: var(--color-text-inv);
}

/* Ensure button text stays white even if it has nav-link class */
.btn-primary.nav-link:hover,
.btn-primary.nav-link:focus-visible {
  color: var(--color-text-inv);
}

/* ── Social Media Section (T020) ────────────────────────────── */

.section-social {
  background: var(--color-primary);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.social-heading {
  color: var(--color-text-inv);
  font-size: var(--font-size-xl);
  font-weight: 700;
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.4;
}

.social-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.btn-social {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-btn);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  background: #fff;
  border: 2px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.18);
}

.btn-social:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

.btn-social__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 6px;
}

.btn-social--whatsapp {
  color: #128c7e;
  border-color: #25d366;
}

.btn-social--telegram {
  color: #0088cc;
  border-color: #0088cc;
}

.btn-social--instagram {
  color: #c13584;
  border-color: #e1306c;
}

.btn-social--tiktok {
  color: #000;
  border-color: #69c9d0;
}

.section-social .social-icons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
}

.section-social .social-icon-link {
  color: var(--color-text-inv);
  opacity: 0.8;
  width: 32px;
  height: 32px;
  min-width: unset;
  min-height: unset;
}

.section-social .social-icon-link:hover {
  opacity: 1;
  color: var(--color-text-inv);
}

.section-social .social-icon {
  width: 32px;
  height: 32px;
}

/* ── Footer (T032) ───────────────────────────────────────────── */

#footer {
  background-color: var(--color-primary);
  color: var(--color-text-inv);
  padding-block: var(--spacing-lg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  text-align: center;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.social-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  color: var(--color-text-inv);
  border-radius: var(--radius-btn);
  transition: color 0.2s ease, transform 0.2s ease;
}

.social-icon-link:hover,
.social-icon-link:focus-visible {
  color: var(--color-accent);
  transform: scale(1.15);
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.social-icon {
  width: 2rem;
  height: 2rem;
  display: block;
}

.footer-copy {
  font-size: var(--font-size-base);
  color: rgba(255, 255, 255, 0.7);
}

.footer-logo {
  display: block;
  max-height: 75px;
  width: auto;
  margin: 0 auto var(--spacing-sm);
}

/* ── Small mobile overrides (T045) — max-width: 479px ───────── */

@media (max-width: 479px) {
  #tradein {
    padding-block: var(--spacing-lg);
  }

  .footer-links {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
}

/* ── Desktop features + steps — min-width: 768px ────────────── */

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }

  .steps-list {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-xl);
  }

  .step {
    flex: 1;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .step-text h3 {
    padding-top: 0;
  }
}

/* ── Desktop selling + trade-in — min-width: 768px ──────────── */

@media (min-width: 768px) {
  #selling .container,
  #tradein .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-xl);
  }

  #selling h2,
  #tradein h2 {
    grid-column: 1 / -1;
  }
}

/* ── Desktop footer (T032) — min-width: 768px ────────────────── */

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

  .footer-links {
    justify-content: flex-start;
  }

  .footer-logo {
    margin: 0 0 var(--spacing-sm) 0;
  }
}

/* ── Desktop nav (T037 / T041) — min-width: 768px ───────────── */

@media (min-width: 768px) {
  /* Hide hamburger icon on desktop */
  .nav-hamburger {
    display: none;
  }

  /* Always show nav-menu as horizontal row on desktop */
  .nav-menu,
  .nav-toggle:checked ~ .nav-menu {
    display: flex;
    flex-direction: row;
    position: static;
    background-color: transparent;
    padding: 0;
    border-top: none;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1; /* span remaining header width */
  }

  /* Remove mobile separator; push lang switcher to far right */
  .lang-switcher {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
    margin-left: auto;
  }
}

/* ── Desktop hero (T025) — min-width: 1024px ─────────────────── */

@media (min-width: 1024px) {
  #hero {
    padding-block: var(--spacing-xl);
  }

  #hero .container {
    gap: var(--spacing-xl);
  }

  #site-header {
    padding-inline: var(--spacing-lg);
  }
}