/* ============================================================
   Afonso de Mello — Personal Site
   developer.apple.com-inspired: soft gray canvas, rounded cards,
   gradient hero/contact panels, app-tile projects.
   ============================================================ */

:root {
  --bg:            #f5f5f7;
  --card:          #ffffff;
  --text:          #1d1d1f;
  --text-2:        #6e6e73;
  --text-3:        #86868b;
  --line:          #e3e3e6;
  --blue:          #0066cc;
  --blue-strong:   #0071e3;
  --nav-bg:        rgba(245, 245, 247, 0.8);
  --card-border:   transparent;

  --radius-lg:     28px;
  --radius:        20px;
  --radius-sm:     14px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;

  --maxw: 1040px;
  --pad: clamp(1rem, 4vw, 1.5rem);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.05);
  --shadow-hover: 0 8px 18px rgba(0,0,0,0.08), 0 24px 48px rgba(0,0,0,0.10);
}

html[data-theme="dark"] {
  --bg:            #000000;
  --card:          #1c1c1e;
  --text:          #f5f5f7;
  --text-2:        #a1a1a6;
  --text-3:        #86868b;
  --line:          #2a2a2d;
  --blue:          #2997ff;
  --blue-strong:   #0a84ff;
  --nav-bg:        rgba(0, 0, 0, 0.8);
  --card-border:   #2a2a2d;
  --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 10px 30px rgba(0,0,0,0.5);
  --shadow-hover: 0 10px 24px rgba(0,0,0,0.55), 0 28px 56px rgba(0,0,0,0.6);
}

html { transition: background-color 0.3s var(--ease); }
html[data-theme="dark"] body { background: var(--bg); }

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
.muted { color: var(--text-3); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
.section { padding-top: clamp(3rem, 8vh, 5.5rem); }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.nav--scrolled { border-bottom-color: rgba(0,0,0,0.08); }
.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 52px;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav__brand { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.02em; white-space: nowrap; }
.nav__links { display: flex; gap: 1.9rem; font-size: 0.82rem; color: var(--text-2); }
.nav__links a { transition: color 0.2s; }
.nav__links a:hover { color: var(--text); }
.nav__actions { display: flex; align-items: center; gap: 0.85rem; }
.nav__coffee { font-size: 0.82rem; color: var(--text-2); transition: color 0.2s; white-space: nowrap; }
.nav__coffee:hover { color: var(--text); }
.nav__cta {
  font-size: 0.82rem; font-weight: 500;
  padding: 0.4rem 0.95rem; border-radius: 980px;
  background: var(--blue-strong); color: #fff;
  transition: background 0.2s; white-space: nowrap;
}
.nav__cta:hover { background: #0077ed; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.theme-toggle:hover { background: rgba(127,127,127,0.14); color: var(--text); }
.theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: inline; }

/* ---------- Pills (buttons) ---------- */
.pill {
  display: inline-block;
  font-size: 1rem; font-weight: 500;
  padding: 0.78rem 1.7rem;
  border-radius: 980px;
  transition: transform 0.2s var(--ease), background 0.2s, border-color 0.2s;
}
.pill--solid { background: #fff; color: #1d1d1f; }
.pill--solid:hover { transform: scale(1.04); }
.pill--ghost { background: rgba(255,255,255,0.12); color: #fff; border: 1px solid rgba(255,255,255,0.25); }
.pill--ghost:hover { background: rgba(255,255,255,0.2); }

.chev { display: inline-block; transition: transform 0.2s var(--ease); }

/* ---------- Hero card ---------- */
.hero-card {
  position: relative;
  margin-top: clamp(1rem, 4vh, 2.5rem);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #07070c;
  text-align: center;
  padding: clamp(4rem, 12vh, 7.5rem) var(--pad);
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-card__glow {
  position: absolute; inset: 0;
  background:
    radial-gradient(30% 38% at 20% 24%, rgba(99, 91, 255, 0.95), transparent 60%),
    radial-gradient(28% 34% at 82% 20%, rgba(10, 132, 255, 0.90), transparent 60%),
    radial-gradient(34% 42% at 72% 88%, rgba(48, 209, 209, 0.75), transparent 62%),
    radial-gradient(30% 40% at 10% 90%, rgba(191, 90, 242, 0.85), transparent 62%);
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift {
  0%   { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(2%, -2%, 0) scale(1.08); }
}
.hero-card__content { position: relative; max-width: 760px; }
.hero-card__eyebrow {
  font-size: 0.95rem; font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: 1.1rem;
}
.hero-card__title {
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  font-weight: 600; letter-spacing: -0.03em; line-height: 1.04;
  color: #fff; margin-bottom: 0.4rem;
}
.hero-card__tagline {
  font-size: clamp(1.5rem, 4vw, 2.3rem);
  font-weight: 600; letter-spacing: -0.02em;
  color: rgba(255,255,255,0.62); margin-bottom: 1.5rem;
}
.hero-card__sub {
  font-size: clamp(1.1rem, 2.4vw, 1.3rem);
  color: rgba(255,255,255,0.78);
  max-width: 34ch; margin: 0 auto 2.4rem; line-height: 1.45;
}
.hero-card__links { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Statement / about ---------- */
.statement { max-width: 820px; }
.statement__text {
  font-size: clamp(1.7rem, 4vw, 2.9rem);
  font-weight: 600; letter-spacing: -0.02em; line-height: 1.18;
  margin-bottom: 1.8rem;
}
.statement__body {
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  color: var(--text-2); line-height: 1.5; max-width: 64ch;
}

/* ---------- Section heads ---------- */
.head { margin-bottom: clamp(1.8rem, 4vh, 2.8rem); }
.head__title { font-size: clamp(2rem, 5vw, 2.8rem); font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.head__lead { font-size: clamp(1.05rem, 2.2vw, 1.25rem); color: var(--text-2); max-width: 52ch; line-height: 1.45; }

/* ---------- Cards (work / skills) ---------- */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.cards--skills { gap: 1.25rem; }
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.9rem;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.card--wide { grid-column: 1 / -1; }
.card__period { font-size: 0.85rem; font-weight: 600; color: var(--blue); display: block; margin-bottom: 0.7rem; }
.card__role { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.015em; margin-bottom: 0.2rem; }
.card__org { font-size: 0.98rem; color: var(--text-3); margin-bottom: 0.8rem; }
.card__desc { font-size: 1.02rem; color: var(--text-2); line-height: 1.5; }
.cards--skills .card__role { margin-bottom: 0.7rem; }

/* ---------- Project tiles ---------- */
.tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.tile {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
a.tile:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.tile--wide { grid-column: 1 / -1; }

.appicon {
  width: 60px; height: 60px;
  border-radius: 15px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.7rem; font-weight: 600; color: #fff;
  margin-bottom: 1.3rem;
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}
.appicon--cw { background: linear-gradient(145deg, #0a84ff, #30d1d1); }
.appicon--op { background: linear-gradient(145deg, #bf5af2, #ff375f); }
.appicon--dr { background: linear-gradient(145deg, #1d1d1f, #3a3a3c); font-size: 1.9rem; }

.tile__text { flex: 1; }
.tile__kicker { font-size: 0.85rem; font-weight: 600; color: var(--blue); display: block; margin-bottom: 0.4rem; }
.tile__name { font-size: clamp(1.5rem, 3vw, 1.9rem); font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.4rem; }
.tile__tagline { font-size: 1.1rem; color: var(--text-2); line-height: 1.45; max-width: 52ch; }
.tile__link { margin-top: 1.4rem; color: var(--blue); font-size: 1.05rem; display: inline-flex; align-items: center; gap: 0.15rem; }
a.tile:hover .tile__link .chev { transform: translateX(3px); }

/* ---------- Contact card ---------- */
.contact-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #07070c;
  text-align: center;
  padding: clamp(3.5rem, 10vh, 6rem) var(--pad);
}
.contact-card__glow {
  position: absolute; inset: 0;
  background:
    radial-gradient(32% 48% at 16% 18%, rgba(10, 132, 255, 0.9), transparent 62%),
    radial-gradient(32% 46% at 86% 26%, rgba(191, 90, 242, 0.85), transparent 62%),
    radial-gradient(38% 52% at 62% 96%, rgba(48, 209, 209, 0.72), transparent 64%);
  animation: drift 20s ease-in-out infinite alternate;
}
.contact-card__content { position: relative; max-width: 620px; margin: 0 auto; }
.contact-card__title { font-size: clamp(2.1rem, 6vw, 3.4rem); font-weight: 600; letter-spacing: -0.025em; color: #fff; margin-bottom: 1.1rem; }
.contact-card__sub { font-size: clamp(1.1rem, 2.4vw, 1.3rem); color: rgba(255,255,255,0.78); max-width: 44ch; margin: 0 auto 2.3rem; line-height: 1.5; }
.contact-card__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2.8rem; }
.contact-card__coffee { padding-top: 2.2rem; border-top: 1px solid rgba(255,255,255,0.14); }
.contact-card__coffee p { color: rgba(255,255,255,0.7); margin-bottom: 0.7rem; font-size: 1rem; }
.coffee-link { display: inline-flex; align-items: center; gap: 0.2rem; color: #2997ff; font-size: 1.08rem; font-weight: 500; }
.coffee-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.coffee-link:hover .chev { transform: translateX(3px); }

/* ---------- Footer ---------- */
.footer { padding: 2.5rem var(--pad); margin-top: clamp(3rem, 8vh, 5rem); border-top: 1px solid var(--line); }
.footer__inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer__links { display: flex; gap: 1.8rem; }
.footer__links a { font-size: 0.82rem; color: var(--text-2); transition: color 0.2s; }
.footer__links a:hover { color: var(--text); }
.footer__copy { font-size: 0.82rem; color: var(--text-3); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .nav__links { display: none; }
}
@media (max-width: 640px) {
  .cards, .tiles { grid-template-columns: 1fr; }
  .nav__coffee { display: none; }
  .hero-card__links, .contact-card__actions { flex-direction: column; align-items: stretch; }
  .pill { text-align: center; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}