/* ============================================================
   Riccardo Capobianco — Portfolio
   Design concept: a route log. Every section is a waypoint on a
   line that runs top to bottom, echoing dive logs, trail maps and
   rowing splits — the way Riccardo actually tracks his own life.
   ============================================================ */

:root {
  /* Color */
  --base:        #FAFAF7;
  --surface:      #FFFFFF;
  --ink:          #16233B;
  --ink-muted:    #5C6572;
  --ink-faint:    #93998F;
  --accent:       #1B7F8E;
  --accent-deep:  #124F59;
  --accent-wash:  #E7F2F1;
  --signal:       #E8622C;
  --signal-wash:  #FCE9DF;
  --line:         #E3E0D6;
  --line-strong:  #C9C4B4;

  /* Type */
  --font-display: 'Big Shoulders Display', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  /* Layout */
  --sidebar-w:    300px;
  --topbar-h:     72px;
  --content-w:    980px;
  --radius:       2px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--base);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0;
  line-height: 1.02;
  text-transform: uppercase;
}

p { margin: 0 0 1em; color: var(--ink-muted); }
p:last-child { margin-bottom: 0; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ---------- Coordinate eyebrow (signature motif) ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-bottom: 0.9em;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--signal);
  display: inline-block;
}

/* ============================================================
   Top bar
   ============================================================ */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 48px);
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 100;
}

.topbar-left { display: flex; align-items: center; gap: 20px; }

.hamburger {
  width: 34px; height: 24px;
  position: relative;
  background: none; border: none;
  cursor: pointer;
  padding: 0;
  display: flex; flex-direction: column; justify-content: space-between;
}
.hamburger span {
  display: block;
  width: 100%; height: 2px;
  background: var(--ink);
  transition: transform 0.32s cubic-bezier(.6,.05,.2,1), opacity 0.2s, background 0.2s;
  transform-origin: center;
}
.hamburger:hover span { background: var(--accent); }
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(11px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-11px) rotate(-45deg);
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.35rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.wordmark span { color: var(--accent); }

.topnav {
  display: flex;
  gap: clamp(16px, 2vw, 32px);
}
.topnav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-muted);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.topnav a:hover { color: var(--ink); }
.topnav a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--signal);
}

@media (max-width: 760px) {
  .topnav { display: none; }
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar-overlay {
  position: fixed; inset: 0;
  background: rgba(22, 35, 59, 0.28);
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 110;
}
.sidebar-overlay.open { opacity: 1; pointer-events: auto; }

.sidebar {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  width: min(var(--sidebar-w), 82vw);
  background: var(--surface);
  border-right: 1px solid var(--line);
  transform: translateX(-100%);
  transition: transform 0.38s cubic-bezier(.6,.05,.2,1);
  z-index: 120;
  padding: 28px 32px;
  display: flex; flex-direction: column;
}
.sidebar.open { transform: translateX(0); }

.sidebar-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 40px;
}
.sidebar-close {
  background: none; border: none; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--ink-muted); letter-spacing: 0.08em;
  text-transform: uppercase;
}
.sidebar-close:hover { color: var(--signal); }

.sidebar-route {
  position: relative;
  padding-left: 26px;
  flex: 1;
}
.sidebar-route::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--line-strong);
}
.sidebar-route a {
  position: relative;
  display: block;
  padding: 14px 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-muted);
  transition: color 0.15s;
}
.sidebar-route a::before {
  content: "";
  position: absolute;
  left: -26px; top: 50%;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--base);
  border: 2px solid var(--line-strong);
  transform: translateY(-50%);
  transition: border-color 0.15s, background 0.15s;
}
.sidebar-route a:hover { color: var(--ink); }
.sidebar-route a[aria-current="page"] { color: var(--accent-deep); }
.sidebar-route a[aria-current="page"]::before {
  border-color: var(--signal);
  background: var(--signal);
}

.sidebar-foot {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.sidebar-foot a {
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.15s, border-color 0.15s;
}
.sidebar-foot a:hover {
  color: var(--accent-deep);
  border-color: var(--accent-deep);
}

/* ============================================================
   Page shell
   ============================================================ */
main {
  padding-top: var(--topbar-h);
}

.section {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: clamp(56px, 9vw, 108px) clamp(20px, 4vw, 48px);
}

.section-inner {
  position: relative;
  padding-left: clamp(0px, 3vw, 32px);
}

/* ============================================================
   Hero (home page)
   ============================================================ */
.hero {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: clamp(64px, 12vw, 140px) clamp(20px, 4vw, 48px) clamp(48px, 8vw, 90px);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}
@media (max-width: 800px) {
  .hero { grid-template-columns: 1fr; text-align: left; }
  .hero-photo { order: -1; width: 180px; }
}

.hero-title {
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  color: var(--ink);
}
.hero-title .line2 { color: var(--accent); display: block; }

.hero-role {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--signal);
  text-transform: uppercase;
  margin: 18px 0 22px;
}

.hero-bio {
  font-size: 1.05rem;
  max-width: 46ch;
}

.hero-photo-wrap {
  position: relative;
  width: 100%;
  max-width: 340px;
  justify-self: center;
}
.hero-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--accent-wash);
}
.hero-photo-ring {
  position: absolute;
  inset: -14px;
  border: 1px dashed var(--line-strong);
  border-radius: 50%;
  pointer-events: none;
}
.hero-photo-fallback {
  width: 100%; aspect-ratio: 1/1; border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, var(--accent-wash), var(--base) 70%);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 3.2rem;
  color: var(--accent-deep);
}

.hero-tags {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 26px;
}
.hero-tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 11px;
  border: 1px solid var(--line);
  color: var(--ink-muted);
  border-radius: 999px;
}

/* ============================================================
   Cards (skills / passions / projects)
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin-top: 8px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 26px 24px;
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-deep);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.card h3 {
  font-size: 1.35rem;
  margin-bottom: 8px;
  text-transform: none;
}

.card p { font-size: 0.94rem; }

.card-stat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal);
  margin-top: 12px;
  display: block;
}

/* ============================================================
   Skill bars (skills page)
   ============================================================ */
.skill-group { margin-bottom: 40px; }
.skill-group:last-child { margin-bottom: 0; }
.skill-group h3 {
  font-size: 1.15rem;
  text-transform: none;
  color: var(--ink);
  margin-bottom: 18px;
  font-family: var(--font-body);
  font-weight: 700;
}

.skill-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
  font-size: 0.92rem;
}
.skill-row .skill-name { color: var(--ink); font-weight: 500; }
.skill-track {
  height: 5px;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  width: 0;
  transition: width 1.1s cubic-bezier(.2,.7,.2,1);
}

.flag-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  margin-right: 8px;
  display: inline-flex;
  align-items: center;
  vertical-align: -2px;
  transform-origin: center;
  transition: transform 0.15s ease;
}
.flag-btn svg {
  display: block;
  border-radius: 1px;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.12) inset;
}
.flag-btn:hover { transform: scale(1.15); }
.flag-btn:active { transform: scale(0.92); }

@media (max-width: 560px) {
  .skill-row { grid-template-columns: 1fr; gap: 6px; }
}

/* ============================================================
   Timeline (education page)
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 34px;
  margin-top: 20px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 6px; top: 4px; bottom: 4px;
  width: 1px;
  background: var(--line-strong);
}

.tl-item {
  position: relative;
  padding-bottom: 44px;
}
.tl-item:last-child { padding-bottom: 0; }

.tl-item::before {
  content: "";
  position: absolute;
  left: -34px; top: 4px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
}

.tl-period {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}

.tl-item h3 {
  text-transform: none;
  font-size: 1.3rem;
  margin-bottom: 6px;
}
.tl-item h3 a {
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color 0.15s, color 0.15s;
}
.tl-item h3 a:hover { color: var(--accent-deep); border-color: var(--accent-deep); }

.tl-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.tl-badges span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 4px 9px;
  background: var(--accent-wash);
  color: var(--accent-deep);
  border-radius: 999px;
  letter-spacing: 0.04em;
}

/* ============================================================
   Contact block (repeats on every page)
   ============================================================ */
.contact {
  background: var(--ink);
  color: var(--base);
  padding: clamp(48px, 8vw, 80px) clamp(20px, 4vw, 48px);
}
.contact-inner {
  max-width: var(--content-w);
  margin: 0 auto;
}
.contact .eyebrow { color: var(--signal); }
.contact .eyebrow::before { background: var(--accent); }

.contact h2 {
  color: var(--base);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin-bottom: 28px;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
}
.btn:hover { transform: translateY(-1px); }

.btn-solid {
  background: var(--accent);
  color: #fff;
}
.btn-solid:hover { background: var(--accent-deep); }

.btn-outline {
  background: transparent;
  color: var(--base);
  border-color: rgba(250,250,247,0.35);
}
.btn-outline:hover { border-color: var(--signal); color: var(--signal); }

.btn-icon { width: 16px; height: 16px; flex-shrink: 0; }

.contact-email-row {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(250,250,247,0.6);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.copy-toast {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal);
  opacity: 0;
  transition: opacity 0.25s;
}
.copy-toast.show { opacity: 1; }

.footer-meta {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(250,250,247,0.15);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(250,250,247,0.4);
  letter-spacing: 0.06em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}