/* ============================================
   DEV 1.0 — Site Vitrine
   Mobile-first responsive design
   ============================================ */

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

/* --- Custom Properties --- */
:root {
  --color-primary: #3e70b7;
  --color-primary-hover: #2d5a9e;
  --color-dark: #1d1d1b;
  --color-white: #ffffff;
  --color-gray-light: #f5f5f5;
  --color-gray-mid: #e0e0e0;
  --color-gray-text: #6b6b6b;

  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-hero: clamp(2.5rem, 5vw, 4rem);
  --font-size-h1: clamp(2rem, 4vw, 3rem);
  --font-size-h2: clamp(1.5rem, 3vw, 2rem);
  --font-size-h3: clamp(1.2rem, 2vw, 1.5rem);
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  --font-weight-black: 900;
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  --max-width: 1200px;
  --nav-height: 64px;
  --transition-fast: 200ms ease-out;
  --transition-normal: 300ms ease-out;
}

/* --- Base --- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-dark);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* --- Skip to content --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-sm);
  z-index: 1000;
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus {
  top: 0;
}

/* --- Typography --- */
h1, h2, h3 {
  line-height: var(--line-height-tight);
  color: var(--color-dark);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-black);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
}

p {
  margin-bottom: var(--space-sm);
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  text-decoration: underline;
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-gray-light);
  border-bottom: 1px solid var(--color-gray-mid);
  height: var(--nav-height);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 1599px) {
  .nav__inner {
    padding: 0 var(--space-md);
  }
}

.nav__logo {
  display: block;
  height: auto;
  width: 165px;
  margin-top: -2px;
  padding-right: 20px;
}

.nav__logo img {
  height: 100%;
  width: auto;
}

.nav__links {
  display: none;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

.nav__links a {
  color: var(--color-dark);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--color-primary);
  text-decoration: none;
}

.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  position: relative;
  transition: background var(--transition-fast);
}

.nav__toggle span::before,
.nav__toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  transition: transform var(--transition-fast);
}

.nav__toggle span::before {
  top: -7px;
}

.nav__toggle span::after {
  top: 7px;
}

.nav__toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav__toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav__mobile {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-gray-light);
  border-bottom: 1px solid var(--color-gray-mid);
  padding: var(--space-sm) var(--space-md);
  list-style: none;
}

.nav__mobile.is-open {
  display: block;
}

.nav__mobile li {
  padding: var(--space-xs) 0;
}

.nav__mobile a {
  color: var(--color-dark);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-body);
  display: block;
  padding: var(--space-xs) 0;
}

.nav__mobile a:hover,
.nav__mobile a[aria-current="page"] {
  color: var(--color-primary);
  text-decoration: none;
}

/* --- Hero --- */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding: var(--space-lg) var(--space-md);
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero__punchline {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: var(--font-size-body);
  color: var(--color-gray-text);
  margin-bottom: var(--space-md);
  max-width: 615px;
}

.hero__cta {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem var(--space-md);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-body);
  border: none;
  text-decoration: none;
  transition: background var(--transition-fast);
}

.hero__cta:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
  color: var(--color-white);
}

.hero--compact {
  min-height: auto;
  padding: var(--space-xl) var(--space-md) var(--space-lg);
}

/* --- Sections --- */
.section {
  padding: var(--space-xl) var(--space-md);
}

.section--alt {
  background-color: var(--color-gray-light);
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__title {
  margin-bottom: var(--space-lg);
}

.section__text {
  max-width: 720px;
}

.section__intro {
  max-width: 720px;
  margin-bottom: var(--space-lg);
  color: var(--color-text-gray);
  line-height: 1.7;
}

.section__inner--split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.section__content {
  order: 1;
}

.section__image {
  order: 2;
  margin: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  max-width: 400px;
}

.section__image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 394px;
}

.section__link {
  display: inline-block;
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-sm);
}

/* --- Expertise Cards --- */
.expertise-grid {
  display: grid;
  gap: var(--space-md);
}

.expertise-card {
  padding: var(--space-md) 0;
}

.expertise-card__number {
  display: block;
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-black);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.expertise-card__title {
  margin-bottom: var(--space-xs);
}

.expertise-card__description {
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.expertise-card__link {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-small);
}

/* --- Trust Signals --- */
.trust-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.trust-signal {
  text-align: center;
  padding: var(--space-sm);
}

.trust-signal__number {
  display: block;
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-black);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.trust-signal__label {
  font-size: var(--font-size-small);
  color: var(--color-gray-text);
  font-weight: var(--font-weight-medium);
}

/* --- Tech Stack --- */
.tech-stack {
  margin-bottom: var(--space-md);
}

.tech-stack:last-child {
  margin-bottom: 0;
}

.tech-stack__label {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-small);
  color: var(--color-gray-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.tech-stack__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
}

.tech-stack__item {
  background: var(--color-gray-light);
  color: var(--color-dark);
  padding: 0.5rem 0.75rem;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--color-gray-mid);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-width: 80px;
}

.tech-stack__item img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.section--alt .tech-stack__item {
  background: var(--color-white);
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-gray-mid);
}

.timeline__entry {
  position: relative;
  margin-bottom: var(--space-lg);
}

.timeline__entry:last-child {
  margin-bottom: 0;
}

.timeline__entry::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-lg) - 5px);
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
}

.timeline__year {
  display: block;
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-black);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.timeline__content h3 {
  margin-bottom: var(--space-xs);
}

/* --- Component Cards --- */
.component-grid {
  display: grid;
  gap: var(--space-md);
}

.component-card {
  padding: var(--space-md);
  border: 1px solid var(--color-gray-mid);
  background: var(--color-white);
}

.component-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.component-card__logo {
  max-width: 160px;
  width: 160px;
  height: auto;
}

.component-card__status {
  display: inline-block;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  padding: 0.125rem 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  align-self: flex-start;
}

.component-card--released .component-card__status {
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

.component-card--released .component-card__status:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
  color: var(--color-white);
}

.component-card--dev .component-card__status {
  background: var(--color-gray-light);
  color: var(--color-gray-text);
  border: 1px solid var(--color-gray-mid);
}

.component-card__title {
  margin-bottom: var(--space-xs);
}

.component-card__link {
  display: inline-block;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-small);
  margin-top: var(--space-sm);
  text-align: right;
  width: 100%;
}

.component-card__description {
  margin-bottom: var(--space-sm);
}

.component-card__stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.component-card__tag {
  background: var(--color-gray-light);
  padding: 0.125rem 0.5rem;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--color-gray-mid);
}

/* --- Culture Values --- */
.culture-values {
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.culture-value {
  padding: var(--space-sm);
  border-left: 3px solid var(--color-primary);
}

.culture-value h3 {
  margin-bottom: var(--space-xs);
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-xl) var(--space-md) var(--space-lg);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
}

.footer__logo {
  width: 195px;
  height: auto;
}

.footer__tagline {
  font-size: var(--font-size-small);
  color: var(--color-gray-text);
  font-style: italic;
  max-width: 280px;
  line-height: 1.5;
}

.footer a {
  color: var(--color-white);
}

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

.footer__contact p {
  margin-bottom: var(--space-xs);
  font-size: var(--font-size-small);
}

.footer__nav ul {
  list-style: none;
}

.footer__nav li {
  margin-bottom: var(--space-xs);
}

.footer__nav a {
  font-size: var(--font-size-small);
}

.footer__legal {
  grid-column: 1 / -1;
  font-size: var(--font-size-small);
  color: var(--color-gray-text);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  text-align: center;
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

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

/* --- Legal Content --- */
.legal-content h2 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p {
  margin-bottom: var(--space-sm);
}

/* ============================================
   Responsive: Tablet (>=768px)
   ============================================ */
@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }

  .nav__toggle {
    display: none;
  }

  .nav__mobile {
    display: none !important;
  }

  .expertise-grid {
    grid-template-columns: 1fr 1fr;
  }

  .trust-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .component-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer__inner {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--space-xl);
  }

  .hero__punchline {
    max-width: 800px;
  }

  .culture-values {
    grid-template-columns: 1fr 1fr;
  }

  .section__inner--split {
    grid-template-columns: 1fr 1fr;
  }

  .section__content {
    order: 1;
  }

  .section__image {
    order: 2;
  }
}

/* ============================================
   Responsive: Desktop (>1024px)
   ============================================ */
@media (min-width: 1025px) {
  .section {
    padding: var(--space-xl) var(--space-lg);
  }

  .hero {
    padding: var(--space-lg);
  }

  .hero--compact {
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
  }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}