/* ============================================================
   Simão Pina — Personal Hero Site
   Design system: Motion-Driven / Monochrome + Blue accent
   ============================================================ */

:root,
[data-theme="dark"] {
  --color-primary: #FAFAFA;
  --color-on-primary: #09090B;
  --color-secondary: #A1A1AA;
  --color-accent: #3B82F6;
  --color-accent-hover: #60A5FA;
  --color-accent-soft: rgba(59, 130, 246, 0.14);
  --color-background: #09090B;
  --color-surface: #131316;
  --color-surface-2: #1B1B1F;
  --color-foreground: #FAFAFA;
  --color-muted: #71717A;
  --color-border: #27272A;
  --color-ring: #3B82F6;
  --shadow-color: 0deg 0% 0%;
  color-scheme: dark;
}

[data-theme="light"] {
  --color-primary: #18181B;
  --color-on-primary: #FFFFFF;
  --color-secondary: #52525B;
  --color-accent: #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-accent-soft: rgba(37, 99, 235, 0.10);
  --color-background: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-surface-2: #F1F1F3;
  --color-foreground: #09090B;
  --color-muted: #71717A;
  --color-border: #E4E4E7;
  --color-ring: #2563EB;
  --shadow-color: 220deg 20% 60%;
  color-scheme: light;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 300ms ease, color 300ms ease;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ol, ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; background: none; border: none; color: inherit; }
img { max-width: 100%; display: block; }

::selection { background: var(--color-accent); color: #fff; }

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  z-index: 1000;
  transition: top 200ms ease;
  font-weight: 600;
}
.skip-link:focus { top: 16px; }

:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 3px;
  border-radius: 4px;
}

.icon-btn:focus-visible,
.btn:focus-visible,
.contact-card:focus-visible {
  outline-offset: 4px;
}

/* ---------- Background decoration ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 100%);
}

.bg-glow {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 900px;
  max-width: 140vw;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-soft) 0%, transparent 65%);
  z-index: -1;
  pointer-events: none;
}

/* ---------- Layout helpers ---------- */
.section-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  background: color-mix(in srgb, var(--color-background) 72%, transparent);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  font-family: 'JetBrains Mono', monospace;
}
.nav-logo .dot { color: var(--color-accent); }

.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-secondary);
  transition: color 200ms ease;
  position: relative;
  padding: 4px 0;
}
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--color-foreground); }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width 250ms ease;
}
.nav-links a:hover::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  color: var(--color-foreground);
  cursor: pointer;
  transition: background-color 200ms ease, transform 150ms ease;
}
.icon-btn:hover { background: var(--color-surface-2); }
.icon-btn:active { transform: scale(0.94); }

.icon { width: 20px; height: 20px; flex-shrink: 0; }
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 28px; height: 28px; color: var(--color-accent); }

.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.nav-burger { display: none; }

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 8px 24px 20px;
  border-top: 1px solid var(--color-border);
}
.mobile-menu a {
  padding: 12px 4px;
  font-weight: 500;
  color: var(--color-secondary);
  border-bottom: 1px solid var(--color-border);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--color-foreground); }
.mobile-menu.open { display: flex; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-burger { display: inline-flex; }
}

/* ---------- Hero ---------- */
.hero {
  min-height: calc(100dvh - 73px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 24px 96px;
  position: relative;
}

.hero-inner {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: 999px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
  animation: pulse-dot 2.2s ease-out infinite;
}
@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); }
  70%  { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.hero-title {
  font-size: clamp(2.75rem, 8vw, 5.5rem);
  line-height: 1.05;
  background: linear-gradient(180deg, var(--color-foreground) 60%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-role {
  font-size: clamp(1.1rem, 2.6vw, 1.5rem);
  font-weight: 600;
  color: var(--color-accent);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.01em;
}

.hero-desc {
  max-width: 560px;
  color: var(--color-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-meta { margin-top: 4px; }

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-secondary);
}
.meta-chip .icon { color: var(--color-muted); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  min-height: 48px;
  cursor: pointer;
  transition: transform 150ms ease, background-color 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 8px 24px -8px var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); }

.btn-secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-foreground);
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  animation: bounce-cue 2.4s ease-in-out infinite;
}
.scroll-cue:hover { color: var(--color-accent); border-color: var(--color-accent); }
@keyframes bounce-cue {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- Sections ---------- */
.section {
  padding: 120px 0;
  position: relative;
}
.section-alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: 'JetBrains Mono', monospace;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-top: 12px;
  margin-bottom: 56px;
}

/* ---------- Timeline (Experience) ---------- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-left: 28px;
  border-left: 2px solid var(--color-border);
}

.timeline-item {
  position: relative;
}

.timeline-marker {
  position: absolute;
  left: -34.5px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--color-background);
  border: 2px solid var(--color-accent);
}

.timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 24px 28px;
  transition: border-color 250ms ease, transform 250ms ease;
}
.timeline-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.timeline-head h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 999px;
}
.badge-current {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.timeline-company {
  font-weight: 600;
  color: var(--color-foreground);
  margin-bottom: 4px;
}

.timeline-period {
  font-size: 0.9rem;
  color: var(--color-secondary);
  font-family: 'JetBrains Mono', monospace;
}

.timeline-location {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-top: 4px;
}

/* ---------- Skills ---------- */
.skills-primary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.skill-card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 250ms ease, border-color 250ms ease;
}
.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}
.skill-card h3 { font-size: 1.1rem; }
.skill-card p { color: var(--color-secondary); font-size: 0.92rem; line-height: 1.6; }

.skills-secondary {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-secondary);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  border-radius: 999px;
  transition: color 200ms ease, border-color 200ms ease;
}
.tag:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* ---------- Contact ---------- */
.section-contact { text-align: center; }
.contact-desc {
  max-width: 520px;
  margin: 0 auto 40px;
  color: var(--color-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  text-align: left;
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  transition: border-color 250ms ease, transform 250ms ease;
}
.contact-card:hover { border-color: var(--color-accent); transform: translateY(-3px); }
.contact-card-static { cursor: default; }
.contact-card-static:hover { transform: none; border-color: var(--color-border); }

.contact-label {
  display: block;
  font-size: 0.78rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.contact-value {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  word-break: break-word;
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 32px 24px 48px;
  color: var(--color-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms cubic-bezier(0.16, 1, 0.3, 1), transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* stagger children within timeline / grids slightly via nth-child */
.timeline-item:nth-child(1) { transition-delay: 0ms; }
.timeline-item:nth-child(2) { transition-delay: 60ms; }
.timeline-item:nth-child(3) { transition-delay: 120ms; }
.timeline-item:nth-child(4) { transition-delay: 180ms; }
.timeline-item:nth-child(5) { transition-delay: 240ms; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .skills-primary { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

@media (max-width: 768px) {
  .section { padding: 88px 0; }
  .skills-primary { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .timeline { padding-left: 24px; }
  .timeline-marker { left: -30.5px; }
  .timeline-card { padding: 20px; }
}

@media (max-width: 480px) {
  .hero { padding: 48px 20px 80px; }
  .btn { width: 100%; justify-content: center; }
  .hero-cta { flex-direction: column; width: 100%; }
  .section-inner { padding: 0 20px; }
}