/* =====================================================
   Maxwell Miya — Portfolio
   Design system: dark tech · editorial · quietly confident
   ===================================================== */

/* ---------- reset & tokens ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

:root {
  /* palette */
  --bg:        #0a0e14;
  --bg-2:      #0f141c;
  --bg-3:      #131a24;
  --line:      #1e2836;
  --line-2:    #2a3648;
  --ink:       #e5ecf5;
  --ink-2:     #b0bdcc;
  --ink-3:     #7a8798;
  --accent:    #4fd1c5;
  --accent-2:  #38bdf8;
  --warn:      #f6a969;

  /* type */
  --serif: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono:  'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* spacing */
  --sp-1: .5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2rem;
  --sp-5: 3rem;
  --sp-6: 4.5rem;
  --sp-7: 7rem;

  --radius:   14px;
  --radius-s: 8px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* subtle grid backdrop */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(79,209,197,0.06), transparent 50%),
    radial-gradient(circle at 80% 90%, rgba(56,189,248,0.04), transparent 50%);
  pointer-events: none;
  z-index: -1;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--accent); }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--sp-3);
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: .9rem var(--sp-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
}
.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--bg);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 8px;
}
.brand-text { font-size: 15px; }
.nav-links {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  color: var(--ink-2);
  font-weight: 400;
  position: relative;
  padding: 6px 0;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right .25s ease;
}
.nav-links a:hover::after { right: 0; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--ink);
  transition: transform .2s ease, opacity .2s ease;
}

/* ---------- utility ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .8rem;
}

.section {
  padding: var(--sp-7) 0;
  border-top: 1px solid var(--line);
}
.section-alt {
  background: var(--bg-2);
}
.section-head {
  max-width: 720px;
  margin-bottom: var(--sp-5);
}
.section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-weight: 600;
}
.section-lede {
  margin-top: var(--sp-2);
  color: var(--ink-2);
  font-size: 1.05rem;
  max-width: 60ch;
}

/* ---------- hero ---------- */
.hero {
  padding: var(--sp-7) 0 var(--sp-6);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--sp-6);
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.1rem, 4.8vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--sp-3);
}
.hero-copy .lede {
  color: var(--ink-2);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 56ch;
}

.cta-row {
  margin-top: var(--sp-4);
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.25rem;
  border-radius: var(--radius-s);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .18s ease, border-color .18s ease, color .18s ease;
  font-family: var(--serif);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg);
  font-weight: 600;
}
.btn-primary:hover {
  transform: translateY(-1px);
  color: var(--bg);
  filter: brightness(1.08);
}
.btn-ghost {
  background: transparent;
  border-color: var(--line-2);
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-block { width: 100%; justify-content: center; }

.meta-row {
  margin-top: var(--sp-4);
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 13px;
  color: var(--ink-3);
  font-family: var(--mono);
}
.meta-row li {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}
.meta-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(79,209,197,0.6);
}

/* hero side card */
.hero-side { position: relative; }
.stat-card {
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  box-shadow: 0 20px 60px -30px rgba(0,0,0,0.6);
}
.stat {
  display: flex;
  gap: var(--sp-3);
  align-items: baseline;
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--line);
}
.stat:last-child { border-bottom: 0; padding-bottom: 0; }
.stat-num {
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.03em;
  line-height: 1;
  min-width: 3.2rem;
  font-family: var(--serif);
}
.stat-num .plus { color: var(--accent); font-weight: 400; }
.stat-label {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.5;
}

/* ---------- projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}
.project {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-4);
  transition: border-color .2s ease, transform .2s ease;
}
.project:hover {
  border-color: var(--line-2);
  transform: translateY(-2px);
}
.project-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: var(--sp-2);
}
.project-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: .1em;
}
.project-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(79,209,197,0.3);
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(79,209,197,0.06);
}
.project h3 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: .3rem;
}
.project-context {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: var(--sp-3);
}
.project-body {
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.65;
  margin-bottom: var(--sp-2);
}
.project-body strong { color: var(--ink); font-weight: 600; }

.chip-row {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--sp-2);
}
.chip-row li {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
  background: var(--bg-3);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 20px;
}

/* ---------- skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}
.skill-group {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-4);
}
.skill-group h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--sp-2);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--line);
  letter-spacing: -0.005em;
}
.skill-group ul { list-style: none; }
.skill-group li {
  font-size: 14px;
  color: var(--ink-2);
  padding: 6px 0;
  border-bottom: 1px dashed var(--line);
}
.skill-group li:last-child { border-bottom: 0; }

/* ---------- certifications ---------- */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
}
.cert {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--sp-2);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.cert:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  background: var(--bg-3);
}
.cert img {
  width: 90px;
  height: 90px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.35));
}
.cert-name {
  font-size: 13.5px;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.3;
}
.cert-issuer {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: .04em;
}

/* ---------- timeline ---------- */
.timeline {
  list-style: none;
  position: relative;
  padding-left: 2.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 11px; top: 6px; bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-2), var(--line) 30%, transparent);
}
.tl-item {
  position: relative;
  padding-bottom: var(--sp-5);
}
.tl-item:last-child { padding-bottom: 0; }
.tl-marker {
  position: absolute;
  left: -32px; top: 8px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(79,209,197,0.1);
}
.tl-date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: .3rem;
}
.tl-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: .1rem;
}
.tl-org {
  color: var(--ink-3);
  font-size: 13.5px;
  margin-bottom: var(--sp-1);
}
.tl-body p:not(.tl-date):not(.tl-org) {
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.65;
  max-width: 62ch;
}

/* ---------- about ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--sp-6);
  align-items: start;
}
.about-head { margin-bottom: 0; }
.about-body p {
  color: var(--ink-2);
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: var(--sp-3);
  max-width: 60ch;
}
.about-body p:last-child { margin-bottom: 0; }

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  align-items: start;
}
.contact-head { margin-bottom: 0; }
.contact-list {
  list-style: none;
  margin-top: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.contact-list li {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 14.5px;
  color: var(--ink-2);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--line);
}
.contact-list li:last-child { border-bottom: 0; }
.c-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  min-width: 90px;
}
.contact-list a { color: var(--ink); border-bottom: 1px solid transparent; }
.contact-list a:hover { color: var(--accent); border-color: var(--accent); }

.link-icon {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.link-icon svg {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  padding: 6px;
  border-radius: 8px;
  background: rgba(10, 102, 194, 0.15);
  color: #0A66C2;
  transition: background .18s ease, transform .18s ease;
}
.link-icon:hover svg {
  background: rgba(10, 102, 194, 0.3);
  transform: translateY(-1px);
}

.contact-form {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.field { display: flex; flex-direction: column; gap: .5rem; }
.field-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.field input, .field textarea {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  padding: .75rem .9rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 14.5px;
  transition: border-color .18s ease, background .18s ease;
}
.field input:focus, .field textarea:focus {
  outline: 0;
  border-color: var(--accent);
  background: var(--bg-2);
}
.field textarea { resize: vertical; min-height: 120px; }
.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-status { font-size: 13px; color: var(--ink-3); min-height: 1.2em; text-align: center; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: var(--warn); }

/* ---------- footer ---------- */
.foot {
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  padding: var(--sp-4) 0;
  color: var(--ink-3);
  font-size: 13px;
}
.foot-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.foot-links {
  list-style: none;
  display: flex;
  gap: var(--sp-3);
}

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.on { opacity: 1; transform: none; }

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 960px) {
  .nav-links {
    position: fixed;
    top: 61px; right: 0;
    width: 78%;
    max-width: 340px;
    height: calc(100vh - 61px);
    background: var(--bg-2);
    border-left: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--sp-4) var(--sp-3);
    gap: var(--sp-2);
    transform: translateX(100%);
    transition: transform .28s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 16px; padding: 10px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .hero-grid { grid-template-columns: 1fr; gap: var(--sp-4); }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .certs-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: var(--sp-4); }
  .section { padding: var(--sp-6) 0; }
  .hero { padding: var(--sp-6) 0; }
}

@media (max-width: 560px) {
  .skills-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-num { font-size: 2rem; }
  .stat { flex-direction: column; gap: .3rem; }
  .foot-inner { justify-content: center; text-align: center; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}