/* ==========================================================================
   Ada Reyes — Product & UI/UX Designer Portfolio
   Shared stylesheet: design tokens, layout, components, animations
   ========================================================================== */

/* ---- Design tokens ------------------------------------------------------ */
:root {
  --color-bg: #faf9f6;
  --color-bg-alt: #f1efe9;
  --color-surface: #ffffff;
  --color-ink: #15141a;
  --color-ink-soft: #55525f;
  --color-line: #e5e2da;
  --color-accent: #ff5a3c;
  --color-accent-ink: #ffffff;
  --color-accent-soft: #ffe6e0;
  --color-dark: #15141a;

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;

  --container: 1180px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

button { font: inherit; cursor: pointer; border: none; background: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

section { padding: 96px 0; }

/* ---- Reveal-on-scroll animation ------------------------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

/* ---- Buttons --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}
.btn-primary {
  background: var(--color-ink);
  color: var(--color-bg);
}
.btn-primary:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 90, 60, 0.35);
}
.btn-outline {
  border: 1.5px solid var(--color-ink);
  color: var(--color-ink);
}
.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 90, 60, 0.35);
}

/* ---- Eyebrow / tags ---------------------------------------------------- */
.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: #b8380f;
}

/* ---- Navigation ------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.85);
  -webkit-backdrop-filter: blur(10px); /* Safari requires the prefix */
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
  /* Force the header onto its own stable compositing layer so it doesn't
     z-fight with animated (transform-driven) content scrolling beneath it
     — a known issue when position: sticky + backdrop-filter sit above
     continuously-animating elements on mobile Safari/Chrome. */
  isolation: isolate;
  transform: translateZ(0);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.nav-logo span { color: var(--color-accent); }

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.25s var(--ease);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-links a.active { color: var(--color-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero --------------------------------------------------------------- */
.hero {
  padding: 120px 0 80px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  max-width: 46ch;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, #ffb199 0%, #ff5a3c 55%, #15141a 100%);
  overflow: hidden;
}
.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.35), transparent 40%),
                     radial-gradient(circle at 80% 80%, rgba(21,20,26,0.4), transparent 45%);
  animation: float-glow 8s ease-in-out infinite;
}
@keyframes float-glow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(3%, -3%) scale(1.05); }
}

/* ---- Stats strip --------------------------------------------------------- */
.stats {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 48px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stats-grid .num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-accent);
}
.stats-grid .label {
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}

/* ---- Section headers ------------------------------------------------------ */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
.section-head p { color: var(--color-ink-soft); max-width: 42ch; }

/* ---- Project grid ------------------------------------------------------ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-line);
  cursor: pointer;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(21, 20, 26, 0.12);
}
.project-thumb {
  aspect-ratio: 4 / 3;
  position: relative;
  overflow: hidden;
}
.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.project-card:hover .project-thumb img { transform: scale(1.06); }

.project-body { padding: 22px; }
.project-body .tag { margin-bottom: 12px; }
.project-body h3 { font-size: 1.25rem; margin-bottom: 8px; }
.project-body p { color: var(--color-ink-soft); font-size: 0.92rem; }

/* ---- Case study modal --------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(21, 20, 26, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  max-width: 760px;
  width: 100%;
  max-height: 86vh;
  overflow-y: auto;
  transform: translateY(24px) scale(0.98);
  transition: transform 0.35s var(--ease);
  position: relative;
}
.modal-overlay.is-open .modal { transform: translateY(0) scale(1); }

.modal-hero {
  aspect-ratio: 16 / 7;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 2;
}
.modal-body { padding: 40px; }
.modal-body h3 { font-size: 1.8rem; margin-bottom: 8px; }
.modal-body .tag { margin-bottom: 20px; }
.modal-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 28px 0;
  padding: 20px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.modal-meta div .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
  margin-bottom: 4px;
}
.modal-meta div .value { font-weight: 600; }
.modal-body h4 { font-size: 1rem; margin: 20px 0 8px; }
.modal-body p { color: var(--color-ink-soft); }

/* ---- Skills / tools grid ----------------------------------------------- */
.skills-strip {
  background: var(--color-dark);
  color: var(--color-bg);
  padding: 56px 0;
  overflow: hidden;
}
.skills-track {
  display: flex;
  gap: 48px;
  white-space: nowrap;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  animation: scroll-left 22s linear infinite;
  width: max-content;
}
.skills-track span { opacity: 0.85; }
.skills-track span::after { content: "•"; margin-left: 48px; color: var(--color-accent); }
@keyframes scroll-left {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.skill-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}
.skill-card h4 { font-size: 1.05rem; margin-bottom: 6px; }
.skill-card p { font-size: 0.88rem; color: var(--color-ink-soft); }

/* ---- Timeline (About page) ---------------------------------------------- */
.timeline {
  border-left: 2px solid var(--color-line);
  padding-left: 36px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.timeline-item { position: relative; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -42px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}
.timeline-item .period {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 6px;
}
.timeline-item h3 { font-size: 1.2rem; margin-bottom: 6px; }
.timeline-item p { color: var(--color-ink-soft); }

/* ---- About hero ---------------------------------------------------------- */
.about-hero {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 56px;
  align-items: center;
}
.about-portrait {
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, #ffd6c9 0%, #ff5a3c 60%, #15141a 100%);
}

/* ---- Contact page ----------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}
.contact-info h2 { font-size: 2.2rem; margin-bottom: 16px; }
.contact-info p { color: var(--color-ink-soft); margin-bottom: 32px; max-width: 42ch; }

.contact-detail {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-detail .icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
.contact-detail .label { font-size: 0.8rem; color: var(--color-ink-soft); }
.contact-detail .value { font-weight: 600; }

.social-row { display: flex; gap: 12px; margin-top: 32px; }
.social-row a {
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--color-line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transition: all 0.25s var(--ease);
}
.social-row a:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
  transform: translateY(-3px);
}

.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.field { margin-bottom: 22px; }
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  font: inherit;
  background: var(--color-bg);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}
.field textarea { resize: vertical; min-height: 130px; }
.field-error {
  color: #d1361a;
  font-size: 0.8rem;
  margin-top: 6px;
  display: none;
}
.field.has-error input,
.field.has-error textarea {
  border-color: #d1361a;
}
.field.has-error .field-error { display: block; }

.form-status {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  display: none;
}
.form-status.is-success {
  display: block;
  background: #e6f7ec;
  color: #1c7d3f;
}
.form-status.is-error {
  display: block;
  background: #fdeceb;
  color: #d1361a;
}

/* ---- CTA banner ---------------------------------------------------------- */
.cta-banner {
  background: var(--color-dark);
  color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
}
.cta-banner h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); margin-bottom: 16px; }
.cta-banner p { color: #b9b6c2; margin-bottom: 32px; }
.cta-banner .btn-primary { background: var(--color-accent); color: #fff; }
.cta-banner .btn-primary:hover { background: #fff; color: var(--color-ink); box-shadow: none; }

/* ---- Footer ---------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 48px 0;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-grid .nav-logo { font-size: 1rem; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.9rem; color: var(--color-ink-soft); }
.footer-links a:hover { color: var(--color-accent); }
.footer-copy { font-size: 0.85rem; color: var(--color-ink-soft); }

/* ---- Page intro (non-home pages) ----------------------------------------- */
.page-intro { padding: 72px 0 48px; }
.page-intro h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); margin-bottom: 16px; }
.page-intro p { color: var(--color-ink-soft); max-width: 56ch; font-size: 1.05rem; }

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width: 980px) {
  .hero-grid,
  .about-hero,
  .contact-grid { grid-template-columns: 1fr; }
  .about-portrait { max-width: 320px; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .modal-meta { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 24px 32px;
    gap: 20px;
    border-bottom: 1px solid var(--color-line);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s var(--ease);
  }
  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-toggle { display: flex; }
  .project-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  section { padding: 64px 0; }
  .cta-banner { padding: 40px 24px; }
  .form-card { padding: 28px; }
  .modal-overlay { padding: 12px; }
  .modal-body { padding: 24px; }
}