/* =========================================================
   Yannick Koudjodji — personal site
   Palette: navy / black / white / golden accent
   ========================================================= */

:root {
  --navy: #0a1929;
  --navy-2: #122a44;
  --navy-3: #1c3b5e;
  --gold: #d4af37;
  --gold-soft: #e6c45a;
  --white: #f5f6f8;
  --off-white: #e8ecf1;
  --muted: #8a99aa;
  --on-dark: #eef1f5;
  --on-light: #1a2738;
  --border: rgba(255,255,255,0.08);
  --max: 1120px;
  --radius: 10px;
  --shadow: 0 20px 40px -20px rgba(10,25,41,0.4);
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--navy);
  color: var(--on-dark);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeSpeed;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--on-dark);
  margin: 0 0 0.5em;
}

/* ---------- Layout ---------- */
.container {
  width: min(92%, var(--max));
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  font-family: inherit;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}
.btn--primary:hover { background: var(--gold-soft); border-color: var(--gold-soft); }
.btn--ghost {
  background: transparent;
  color: var(--on-dark);
  border-color: var(--border);
}
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn--full { width: 100%; justify-content: center; }

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10,25,41,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--gold);
}
.nav__links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--on-dark);
  opacity: 0.82;
  transition: opacity var(--transition), color var(--transition);
}
.nav__links a:hover { opacity: 1; color: var(--gold); }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--on-dark);
  border-radius: 2px;
  transition: background var(--transition);
}

/* mobile */
@media (max-width: 760px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,25,41,0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    padding: 32px 24px;
    gap: 24px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.3s ease;
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* =========================================================
   HERO — understated, logo kept modest
   ========================================================= */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(212,175,55,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 70% 100%, rgba(28,59,94,0.4) 0%, transparent 60%);
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; }
.hero__logo {
  width: clamp(110px, 12vw, 140px);
  height: auto;
  margin-bottom: 20px;
  opacity: 0.95;
  image-rendering: crisp-edges;
  border-radius: 4px;
}
.hero__eyebrow {
  font-size: 0.92rem;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 18px;
  text-transform: uppercase;
  opacity: 0.85;
}
.hero__name {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  margin-bottom: 16px;
  color: var(--on-dark);
}
.hero__tagline {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  max-width: 48ch;
  color: var(--muted);
  margin-bottom: 36px;
  line-height: 1.6;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  animation: float 2.4s ease-in-out infinite;
}
.hero__scroll-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0.6;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* =========================================================
   SECTION common
   ========================================================= */
.section {
  padding: 88px 0;
}
.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  text-align: center;
  margin-bottom: 48px;
  position: relative;
  display: inline-block;
  padding-bottom: 14px;
}
.section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 44px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
}

/* =========================================================
   ABOUT — profile photo + bio, experience folded in
   ========================================================= */
.about__grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}
.about__avatar {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 6px rgba(10,25,41,0.7), var(--shadow);
  margin: 0 auto 10px;
  display: block;
}
.about__avatar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.about__caption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 10px;
}
.about__text p {
  color: var(--muted);
  margin-bottom: 16px;
  max-width: 62ch;
}
.about__text strong { color: var(--on-dark); }
.about__link {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(212,175,55,0.4);
  transition: text-decoration-color var(--transition);
}
.about__link:hover { text-decoration-color: var(--gold); }
.about__skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.tag {
  padding: 6px 14px;
  background: rgba(212,175,55,0.12);
  color: var(--gold);
  border: 1px solid rgba(212,175,55,0.25);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
}
.about__note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 22px;
  line-height: 1.55;
  max-width: 62ch;
}

@media (max-width: 760px) {
  .about__grid { grid-template-columns: 1fr; gap: 28px; }
  .about__avatar { width: 180px; height: 180px; }
}

/* =========================================================
   PROJECTS — generic template cards
   ========================================================= */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: var(--shadow);
}
.card__icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(212,175,55,0.1);
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.card__tag {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: 10px;
  display: block;
}
.card__title {
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.card__desc {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 22px;
  flex-grow: 1;
}
.card__links { margin-top: auto; }

.link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.88rem;
  transition: gap var(--transition), color var(--transition);
  color: var(--on-dark);
}
.link:hover { color: var(--gold); gap: 10px; }

@media (max-width: 960px) {
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .projects__grid { grid-template-columns: 1fr; }
}

/* =========================================================
   BLOG — placeholder posts
   ========================================================= */
.blog__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.blog__post {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color var(--transition), transform var(--transition);
}
.blog__post:hover {
  border-color: rgba(212,175,55,0.4);
  transform: translateY(-4px);
}
.blog__post-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: 6px;
  background: var(--navy-3);
  margin-bottom: 18px;
}
.blog__date {
  font-size: 0.78rem;
  color: var(--gold);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  display: block;
}
.blog__title {
  font-family: 'Playfair Display', serif;
  font-size: 1.12rem;
  color: var(--on-dark);
  margin-bottom: 10px;
  line-height: 1.35;
}
.blog__excerpt {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 18px;
}
.blog__read {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold);
  transition: color var(--transition);
}
.blog__read:hover { color: var(--gold-soft); }

.blog__more {
  text-align: center;
}

@media (max-width: 960px) {
  .blog__list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .blog__list { grid-template-columns: 1fr; }
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.section-title { margin-bottom: 22px; }
.contact__text p { color: var(--muted); margin-top: 0; }
.contact__social {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 28px;
}
.social-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--on-dark);
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.social-link:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(212,175,55,0.05);
}

.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--on-dark);
}
.field input, .field textarea {
  background: var(--navy-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--on-dark);
  transition: border-color var(--transition), outline var(--transition);
}
.field input::placeholder, .field textarea::placeholder { color: var(--muted); }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(212,175,55,0.15);
}
.field textarea { resize: vertical; min-height: 110px; }

.form-note { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }

/* Form status messages (success / error / hidden) */
.form-status {
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  min-height: 1.4em;
  transition: opacity 0.2s ease;
}
.form-status--hidden {
  opacity: 0;
  visibility: hidden;
  height: 0;
  padding: 0;
  margin: 0;
  border: none;
  overflow: hidden;
}
.form-status--success {
  color: #c8d8b0;
  background: rgba(154,181,138,0.08);
  border-color: rgba(154,181,138,0.25);
}
.form-status--error {
  color: #f5a3a3;
  background: rgba(245,180,180,0.08);
  border-color: rgba(245,180,180,0.25);
}
.form-status:focus {
  outline: none;
}

@media (max-width: 760px) {
  .contact__grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
}

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  border-top: 1px solid var(--border);
  padding: 30px 0 36px;
}
.footer__copy { font-size: 0.85rem; color: var(--muted); margin-bottom: 12px; text-align: center; }
.footer__links {
  display: flex;
  gap: 22px;
  justify-content: center;
  flex-wrap: wrap;
}
.footer__links a {
  font-size: 0.85rem;
  color: var(--muted);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--gold); }

/* =========================================================
   Scroll-triggered fade-in
   ========================================================= */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}