/* =============================================================
   style.css
   Sections:
   1.  Variables & Reset
   2.  Base & Typography
   3.  Utilities
   4.  Navigation
   5.  Hero
   6.  Projects Grid
   7.  About & Skills
   8.  Contact
   9.  Footer
   10. Project Detail Pages
   11. Responsive — Tablet (≤ 768px)
   12. Responsive — Mobile (≤ 480px)
   ============================================================= */

/* ─── 1. Variables & Reset ─────────────────────────────────── */

:root {
  --bg:             #0f0f0f;
  --surface:        #151515;
  --border:         #1e1e1e;
  --border-hover:   #2a2a2a;
  --text-primary:   #ffffff;
  --text-secondary: #888888;
  --text-muted:     #444444;
  --accent:         #a78bfa;
  --accent-small:   #c4b5fd;
  --accent-on-dark: #0f0f0f;

  --radius-card: 6px;
  --radius-btn:  2px;

  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ─── 2. Base & Typography ─────────────────────────────────── */

h1, h2, h3 {
  line-height: 1.15;
  font-weight: 700;
}

.section-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-small);
  margin-bottom: 0.5rem;
}

.section-heading {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

/* ─── 3. Utilities ─────────────────────────────────────────── */

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

/* ─── 4. Navigation ────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-link--active {
  color: var(--accent);
  text-decoration: none;
}

.nav-link--cta {
  border: 1px solid var(--accent);
  color: var(--accent-small);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-btn);
  transition: background-color var(--transition), color var(--transition);
}

.nav-link--cta:hover {
  background-color: var(--accent);
  color: var(--accent-on-dark);
}

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

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-secondary);
  border-radius: 2px;
  transition: background-color var(--transition);
}

.nav-toggle:hover span {
  background-color: var(--text-primary);
}

/* Mobile nav open state */
.nav-links--open {
  display: flex !important;
  flex-direction: column;
  position: absolute;
  top: 56px;
  left: 0;
  right: 0;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  gap: 1rem;
  z-index: 99;
}

/* ─── 5. Hero ──────────────────────────────────────────────── */

.hero {
  border-bottom: 1px solid var(--border);
  min-height: calc(100vh - 56px);
  display: flex;
  align-items: stretch;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  width: 100%;
  padding-top: 3rem;
  padding-bottom: 0;
}

.hero-content {
  flex: 1;
  padding-bottom: 3rem;
}

.hero-tag {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-small);
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero-ctas {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-btn);
  transition: opacity var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--accent-on-dark);
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-outline {
  border: 1px solid #333;
  color: var(--text-secondary);
}

.btn-outline:hover {
  background-color: var(--accent);
  color: var(--accent-on-dark);
  border-color: var(--accent);
}

/* Hero photo column */
.hero-photo-col {
  width: 260px;
  flex-shrink: 0;
  align-self: stretch;
  background-color: var(--surface);
  position: relative;
  border-radius: 8px 8px 0 0;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.hero-photo-col::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(167, 139, 250, 0.06);
  pointer-events: none;
  z-index: 1;
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 35% top;
  display: block;
}

/* Mobile circular crop (shown only on mobile) */
.hero-photo-mobile {
  display: none;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  margin-bottom: 1rem;
}

/* ─── 6. Projects Grid ─────────────────────────────────────── */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.project-card {
  display: block;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 24px rgba(167, 139, 250, 0.08);
}

.project-card-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--border); /* fallback while image loads */
  border-radius: 4px;
  margin-bottom: 1rem;
}

.project-card-body {
  padding: 1.25rem;
  padding-top: 0;
}

.project-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.project-label--client {
  color: var(--accent-small);
}

.project-label--perso {
  color: var(--text-muted);
}

.project-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.project-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.875rem;
}

/* Tags (shared between project cards and skills section) */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  display: inline-block;
  border: 1px solid var(--border-hover);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-btn);
}

/* 5th card: center in its own row */
.project-card--last {
  grid-column: span 2;
  justify-self: center;
  width: 50%;
}

/* ─── 7. About & Skills ────────────────────────────────────── */

.about-skills-inner {
  display: flex;
  gap: 4rem;
  align-items: flex-start;
}

.about {
  flex: 1;
}

.about-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.skills {
  flex: 1;
}

.skill-group {
  margin-bottom: 1.5rem;
}

.skill-group-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #555;
  margin-bottom: 6px;
}

.tag-notions {
  font-size: 0.6rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
  font-style: italic;
  vertical-align: middle;
}

/* ─── 8. Contact ───────────────────────────────────────────── */

.contact-inner {
  text-align: center;
}

.contact-heading {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.contact-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.contact-cta {
  display: inline-block;
  margin-bottom: 1.5rem;
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.contact-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.contact-link:hover {
  color: var(--accent-small);
  text-decoration: underline;
}

/* ─── 9. Footer ────────────────────────────────────────────── */

.footer {
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 52px;
}

.footer-copy,
.footer-tech {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ─── 10. Project Detail Pages ─────────────────────────────── */

.project-detail {
  padding: 2rem 0 4rem;
}

.back-link {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent-small);
  margin-bottom: 2rem;
  transition: color var(--transition);
}

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

.detail-header {
  margin-bottom: 2.5rem;
}

.detail-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  margin: 0.5rem 0 0.5rem;
}

.detail-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
}

.screenshots-wrapper {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  margin-bottom: 2.5rem;
}

.screenshot-desktop {
  flex: 1;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: block;
  background-color: var(--surface);
}

.screenshot-mobile {
  width: 130px;
  flex-shrink: 0;
  border-radius: 22px;
  border: 1px solid var(--border);
  display: block;
  background-color: var(--surface);
}

.detail-body {
  margin: 2.5rem 0;
}

.detail-body h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.75rem 0 0.6rem;
}

.detail-body h2:first-child {
  margin-top: 0;
}

.detail-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.detail-tech {
  margin-bottom: 2rem;
}

.detail-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.detail-nav {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.detail-nav-prev,
.detail-nav-next {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.detail-nav-prev:hover,
.detail-nav-next:hover {
  color: var(--accent-small);
}

.detail-nav-prev:empty,
.detail-nav-next:empty {
  visibility: hidden;
}

/* ─── 11. Responsive — Tablet (≤ 768px) ───────────────────── */
@media (max-width: 768px) {
  .hero-photo-col { width: 120px; }
  .about-skills-inner { flex-direction: column; gap: 2.5rem; }
  .project-card--last { grid-column: span 2; width: 100%; justify-self: stretch; }
}

/* ─── 12. Responsive — Mobile (≤ 480px) ───────────────────── */
@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .nav-inner { padding: 0 1.25rem; }
  .nav-toggle { display: flex; }
  .nav-links { display: none; }
  .hero-inner { flex-direction: column; align-items: flex-start; padding-top: 2rem; padding-bottom: 2rem; gap: 1.25rem; }
  .hero-photo-col { display: none; }
  .hero-photo-mobile { display: block; }
  .hero-content { padding-bottom: 0; }
  .hero-name { font-size: 2.2rem; } /* override clamp floor — 2.5rem is still too large at 480px */
  .projects-grid { grid-template-columns: 1fr; }
  .project-card--last { grid-column: span 1; width: 100%; justify-self: stretch; }
  .contact-links { gap: 1rem; }
  .footer-inner { flex-direction: column; height: auto; gap: 0.5rem; padding: 1rem 0; text-align: center; }
  .detail-links { flex-direction: column; }
  .detail-nav { flex-direction: column; gap: 0.75rem; }
  .nav-links--open { padding: 1rem 1.25rem; }
}