/* ═══════════════════════════════════════════════════
   PORTFOLIO — Edoardo Collino
   Stile: minimal, elegante, tipografico
   ═══════════════════════════════════════════════════ */

/* ── TOKENS ──────────────────────────────────────── */
:root {
  --white:      #FFFFFF;
  --off-white:  #F8F7F5;
  --sand:       #EDE9E3;
  --border:     #E2DDD7;
  --muted:      #999490;
  --body:       #3A3530;
  --heading:    #1A1714;
  --accent:     #C1622A;
  --accent-h:   #A8521F;

  --ff-serif:   'DM Serif Display', Georgia, serif;
  --ff-sans:    'Inter', system-ui, -apple-system, sans-serif;

  --radius-sm:  4px;
  --radius-md:  10px;
  --radius-lg:  20px;

  --ease:       cubic-bezier(0.25, 0, 0.1, 1);
  --transition: 0.3s var(--ease);

  --max-w:      1120px;
  --gap:        clamp(3rem, 8vw, 7rem);
}

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

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

body {
  font-family: var(--ff-sans);
  background: var(--white);
  color: var(--body);
  line-height: 1.65;
  overflow-x: hidden;
}

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

/* ── CONTAINER ───────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
}

/* ── TYPOGRAPHY ──────────────────────────────────── */
.section-label {
  font-family: var(--ff-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.section-heading {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  color: var(--heading);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-sub {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 52ch;
  line-height: 1.7;
}

em {
  font-family: var(--ff-serif);
  font-style: italic;
}

/* ── BUTTONS ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--ff-sans);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn--sm {
  font-size: 0.8125rem;
  padding: 0.55rem 1.1rem;
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn--primary:hover {
  background: var(--accent-h);
  border-color: var(--accent-h);
}

.btn--ghost {
  background: transparent;
  color: var(--heading);
  border-color: var(--border);
}
.btn--ghost:hover {
  border-color: var(--heading);
  background: var(--off-white);
}

.btn--full { width: 100%; justify-content: center; }

/* ── NAV ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0);
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  font-family: var(--ff-serif);
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--heading);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.nav__logo-dot { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--body);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav__link:hover { color: var(--heading); }
.nav__link:hover::after { transform: scaleX(1); }

.nav__cta { flex-shrink: 0; }

/* hamburger — mobile only */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--heading);
  transition: all var(--transition);
}

.nav__mobile {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 1.5rem clamp(1.25rem, 5vw, 2.5rem);
}
.nav__mobile ul { list-style: none; display: flex; flex-direction: column; gap: 0; }
.nav__mobile-link {
  display: block;
  padding: 0.85rem 0;
  font-size: 1.0625rem;
  color: var(--body);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.nav__mobile-link:hover, .nav__mobile-cta { color: var(--accent); font-weight: 500; }
.nav__mobile.open { display: block; }

/* ── HERO ────────────────────────────────────────── */
.hero {
  padding-top: 140px;
  padding-bottom: var(--gap);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero .section-label { margin-bottom: 2rem; }

.hero__name {
  font-family: var(--ff-serif);
  font-size: clamp(3.5rem, 9vw, 7.5rem);
  font-weight: 400;
  color: var(--heading);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 1.75rem;
}

.hero__tagline {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--body);
  max-width: 48ch;
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.hero__cta-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.8125rem;
  color: var(--muted);
}

.hero__meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.hero__meta-sep { color: var(--border); }

.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: clamp(1.25rem, 5vw, 2.5rem);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── ABOUT ───────────────────────────────────────── */
.about {
  padding: var(--gap) 0;
  background: var(--off-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 5rem;
  align-items: start;
}

.about__heading {
  font-family: var(--ff-serif);
  font-size: clamp(1.625rem, 3vw, 2.375rem);
  font-weight: 400;
  color: var(--heading);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.about__text p {
  font-size: 0.9375rem;
  color: var(--body);
  line-height: 1.75;
  margin-bottom: 1rem;
  max-width: 58ch;
}
.about__text p:last-child { margin-bottom: 0; }

/* about card */
.about__card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--heading);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-serif);
  font-size: 1.375rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.about__stack-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.about__stack-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.about__stack-list li {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--body);
}

.dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.about__status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--body);
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4caf50;
  flex-shrink: 0;
  animation: pulse-green 2.4s ease-in-out infinite;
}

@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4); }
  50%       { box-shadow: 0 0 0 5px rgba(76, 175, 80, 0); }
}

/* ── PORTFOLIO SECTION ───────────────────────────── */
.portfolio-section {
  padding: var(--gap) 0;
}

.section-intro {
  margin-bottom: 3.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

/* project card */
.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(193, 98, 42, 0.1);
}

/* thumbnail */
.project-card__thumb {
  display: block;
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg, var(--off-white));
}

.project-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.5s var(--ease);
}

.project-card:hover .project-card__thumb img {
  transform: scale(1.03);
}

/* placeholder */
.project-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--bg, var(--off-white));
}

.project-card__placeholder-initials {
  font-family: var(--ff-serif);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--accent, var(--heading));
  opacity: 0.6;
}

.project-card__placeholder-label {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* overlay */
.project-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 23, 20, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover .project-card__overlay { opacity: 1; }

.project-card__open {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.6);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
}

/* body */
.project-card__body {
  padding: 1.5rem;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.625rem;
}

.project-card__title {
  font-family: var(--ff-serif);
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--heading);
  margin-bottom: 0.625rem;
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--body);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.project-card__highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 1.125rem;
}

.project-card__highlights li {
  font-size: 0.8125rem;
  color: var(--body);
  padding-left: 1rem;
  position: relative;
}

.project-card__highlights li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  opacity: 0.6;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.tag {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.275rem 0.625rem;
  border-radius: 2px;
}

/* ── CONTACT ─────────────────────────────────────── */
.contact {
  padding: var(--gap) 0;
  background: var(--off-white);
  border-top: 1px solid var(--border);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact__heading {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  color: var(--heading);
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.contact__text p {
  font-size: 0.9375rem;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 46ch;
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact__link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--body);
  transition: color var(--transition);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition), color var(--transition);
}

.contact__link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.contact__link svg { color: var(--muted); flex-shrink: 0; }

/* form */
.contact__form-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.form-group:last-child { margin-bottom: 0; }

.form-group label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--heading);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--ff-sans);
  font-size: 0.9375rem;
  color: var(--body);
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.875rem;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23999490' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: var(--white);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-feedback {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  min-height: 1.4em;
  color: var(--muted);
}
.form-feedback.success { color: #4caf50; }
.form-feedback.error   { color: #d32f2f; }

/* ── FOOTER ──────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.footer__logo {
  font-family: var(--ff-serif);
  font-size: 1.2rem;
  color: var(--heading);
}

.footer__dot { color: var(--accent); }

.footer__tagline {
  font-size: 0.75rem;
  color: var(--muted);
}

.footer__nav {
  display: flex;
  gap: 1.5rem;
}

.footer__nav a {
  font-size: 0.8125rem;
  color: var(--muted);
  transition: color var(--transition);
}
.footer__nav a:hover { color: var(--heading); }

.footer__copy {
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── REVEAL ANIMATION ────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal:nth-child(4) { transition-delay: 0.24s; }

/* ── RESPONSIVE ──────────────────────────────────── */
@media (max-width: 900px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero__scroll { display: none; }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}