/* ═══════════════════════════════════════════════════════════════
   Portfolio — Apple HIG, dark palette, forest green accent
═══════════════════════════════════════════════════════════════ */

/* ── Tokens ──────────────────────────────────────────────────── */
:root {
  /* Apple dark-mode surfaces */
  --bg:        #000000;
  --bg-raised: #1c1c1e;
  --bg-card:   #2c2c2e;
  --text:      #ffffff;
  --text-2:    #98989e;
  --text-3:    #636366;
  --border:    rgba(255, 255, 255, 0.08);

  /* Forest green accent — #3A7D44 clears 4.7:1 contrast on --bg */
  --accent:       #3A7D44;
  --accent-hover: #2E6B38;
  --accent-tint:  rgba(58, 125, 68, 0.14);

  /* Typography — native system stack; SF Pro on Apple devices */
  --font: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;

  /* Shape & spacing */
  --radius:    14px;
  --radius-lg: 20px;
  --nav-h:     52px;
  --pad:       120px;
  --max-w:     1080px;

  /* Apple standard spring ease-out */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { display: block; max-width: 100%; }
a   { color: var(--accent); text-decoration: none; }
ul, ol { list-style: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Layout ──────────────────────────────────────────────────── */
.container {
  width: min(90%, var(--max-w));
  margin-inline: auto;
}

.section {
  padding-block: 2.5rem;
}

.section-heading {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 3rem;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .7rem 1.6rem;
  border-radius: 980px;
  font-family: var(--font);
  font-size: .95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background .25s var(--ease), opacity .25s var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover  { background: var(--accent-hover); color: #fff; }
.btn-primary:active { opacity: .8; }

.btn-secondary {
  background: var(--accent-tint);
  color: var(--accent);
}
.btn-secondary:hover  { background: rgba(58, 125, 68, 0.24); color: var(--accent); }
.btn-secondary:active { opacity: .8; }

.btn-lg { padding: .85rem 2rem; font-size: 1.05rem; }

/* ── Navigation ─────────────────────────────────────────────── */
.nav-wrapper {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.nav-logo:hover { color: var(--text-2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: .9rem;
  font-weight: 400;
  color: var(--text-2);
  transition: color .2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .3rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s var(--ease);
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  padding-top: calc(var(--nav-h) + 2.5rem);
  padding-bottom: 2.5rem;
}

/* Single centered column */
.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Profile photo — circular */
.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 2rem;
  flex-shrink: 0;
  /* Subtle ring to lift photo off dark bg */
  box-shadow: 0 0 0 1px var(--border);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-name {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: .5rem;
}

.hero-tagline {
  font-size: clamp(.95rem, 2vw, 1.15rem);
  font-weight: 400;
  color: var(--text-2);
  margin-bottom: 1.75rem;
}

.hero-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-bio {
  font-size: .975rem;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 660px;
  margin-bottom: .9rem;
}

.hero-bio:last-of-type { margin-bottom: 0; }

/* Shared icon link style */
.social-icon-link {
  display: inline-flex;
  align-items: center;
  color: var(--text-3);
  transition: color .25s;
}
.social-icon-link:hover { color: var(--text-2); }
.social-icon-link svg   { display: block; }

/* ── Section card (shared wrapper for all content sections) ── */
.section-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  width: 100%;
}

/* ── Projects ───────────────────────────────────────────────── */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--bg-raised);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  border: 1px solid var(--border);
  transition: border-color .3s var(--ease);
  display: flex;
  flex-direction: column;
  gap: .9rem;
}

.project-card:hover { border-color: rgba(255, 255, 255, 0.18); }


.project-meta {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.project-meta h3 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text);
}

.project-company {
  font-size: .8rem;
  color: var(--text-3);
}

.project-card > p {
  font-size: .925rem;
  color: var(--text-2);
  line-height: 1.6;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .25rem;
}

.project-tags li {
  font-size: .78rem;
  color: var(--text-3);
  background: var(--bg-card);
  border-radius: 6px;
  padding: .2rem .55rem;
}

/* ── Skills ─────────────────────────────────────────────────── */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem 3rem;
}

.skill-group h3 {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 1.1rem;
}

.skill-group ul {
  display: flex;
  flex-direction: column;
  gap: .55rem;
}

.skill-group li {
  font-size: .95rem;
  color: var(--text-2);
}

/* ── Experience ─────────────────────────────────────────────── */

.timeline {
  display: flex;
  flex-direction: column;
}

.timeline-item {
  padding-bottom: 2.75rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
  position: relative;
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -4px;
  top: .5rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-3);
}

.timeline-date {
  display: block;
  font-size: .82rem;
  color: var(--text-3);
  margin-bottom: .4rem;
}

.timeline-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: .6rem;
}

.timeline-item h3 span {
  font-weight: 400;
  color: var(--text-2);
}

.timeline-item > p {
  font-size: .95rem;
  color: var(--text-2);
  margin-bottom: .9rem;
  max-width: 600px;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.timeline-tags li {
  font-size: .78rem;
  color: var(--text-3);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .15rem .5rem;
}

/* ── Contact ────────────────────────────────────────────────── */

.contact-inner {
  max-width: 520px;
}

.contact-inner h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.contact-inner > p {
  font-size: 1.05rem;
  color: var(--text-2);
  margin-bottom: 2.25rem;
  line-height: 1.65;
}

.contact-links {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
  margin-top: 2.25rem;
}

/* Icon + label stacked vertically */
.contact-link-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  color: var(--text-3);
  font-size: .75rem;
  letter-spacing: .03em;
  transition: color .25s;
}
.contact-link-item:hover { color: var(--text-2); }
.contact-link-item svg   { display: block; }

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

.footer p {
  font-size: .82rem;
  color: var(--text-3);
}

/* ── Reveal animations ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

.fade-in {
  opacity: 0;
  transform: translateY(14px);
  animation: enter .65s var(--ease) forwards;
}
.delay-1 { animation-delay: .08s; }
.delay-2 { animation-delay: .16s; }
.delay-3 { animation-delay: .24s; }
.delay-4 { animation-delay: .34s; }
.delay-5 { animation-delay: .44s; }

@keyframes enter {
  to { opacity: 1; transform: none; }
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 720px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --pad: 80px; }

  /* Mobile nav */
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: rgba(0, 0, 0, 0.94);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 2.25rem;
    transform: translateX(100%);
    transition: transform .35s var(--ease);
    z-index: 99;
    border-top: 1px solid var(--border);
  }
  .nav-links.open  { transform: none; }
  .nav-links a     { font-size: 1.2rem; color: var(--text-2); }
  .nav-toggle      { display: flex; }

  .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(4.5px, 4.5px); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(4.5px, -4.5px); }

  /* Hero already single-column; handled by section padding */
  .hero-photo   { width: 165px; height: 165px; }

  .projects-grid { grid-template-columns: 1fr; }

  .section-card { padding: 2rem 1.25rem; }
}

@media (max-width: 540px) {
  .skills-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 380px) {
  .skills-grid  { grid-template-columns: 1fr; }
}