/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1080px;
  --nav-h: 68px;

  --font-sans: "Space Grotesk", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---- Dark theme (default) ------------------------------------------------ */
:root,
:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0a0e14;
  --bg-elev: #0f141d;
  --bg-card: #121924;
  --bg-card-hover: #16202e;
  --border: #1e2a3a;
  --border-strong: #2a3a4f;

  --text: #e6edf3;
  --text-muted: #9bb0c4;
  --text-dim: #7a8da3;

  --accent: #2ce6c8;
  --accent-strong: #5ff4da;
  --accent-2: #38d977;
  --on-accent: #04120f;

  --accent-glow: rgba(44, 230, 200, 0.15);
  --accent-glow-strong: rgba(44, 230, 200, 0.22);
  --accent-wash: rgba(44, 230, 200, 0.06);
  --accent-2-soft: rgba(56, 217, 119, 0.08);
  --accent-2-border: rgba(56, 217, 119, 0.4);

  --hero-grad-1: #ffffff;
  --hero-grad-2: #a9c2d6;

  --nav-bg: rgba(10, 14, 20, 0.72);
  --nav-bg-solid: rgba(10, 14, 20, 0.9);
  --nav-bg-mobile: rgba(10, 14, 20, 0.97);
  --overlay: rgba(4, 8, 14, 0.72);

  --glow-1: rgba(44, 230, 200, 0.15);
  --glow-2: rgba(56, 217, 119, 0.08);
  --grid-opacity: 0.25;

  --shadow: 0 10px 40px -12px rgba(0, 0, 0, 0.6);
}

/* ---- Light theme --------------------------------------------------------- */
:root[data-theme="light"] {
  color-scheme: light;

  --bg: #f4f7fb;
  --bg-elev: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #edf3fa;
  --border: #dbe4ef;
  --border-strong: #b6c6d8;

  --text: #0d1720;
  --text-muted: #45576a;
  --text-dim: #5f7183;

  --accent: #07705f;
  --accent-strong: #05594a;
  --accent-2: #0c7340;
  --on-accent: #ffffff;

  --accent-glow: rgba(10, 125, 106, 0.1);
  --accent-glow-strong: rgba(10, 125, 106, 0.18);
  --accent-wash: rgba(10, 125, 106, 0.05);
  --accent-2-soft: rgba(15, 127, 69, 0.09);
  --accent-2-border: rgba(15, 127, 69, 0.35);

  --hero-grad-1: #0d1720;
  --hero-grad-2: #4a6480;

  --nav-bg: rgba(244, 247, 251, 0.72);
  --nav-bg-solid: rgba(244, 247, 251, 0.92);
  --nav-bg-mobile: rgba(244, 247, 251, 0.98);
  --overlay: rgba(13, 28, 42, 0.45);

  --glow-1: rgba(10, 125, 106, 0.1);
  --glow-2: rgba(15, 127, 69, 0.07);
  --grid-opacity: 0.6;

  --shadow: 0 10px 40px -14px rgba(20, 45, 70, 0.28);
}

/* ==========================================================================
   Base
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Subtle grid + glow backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 80% -10%, var(--glow-1), transparent 60%),
    radial-gradient(700px 500px at 0% 10%, var(--glow-2), transparent 55%);
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: var(--grid-opacity);
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 75%);
  pointer-events: none;
}

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

h1, h2, h3 {
  line-height: 1.2;
  margin: 0;
  font-weight: 600;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--on-accent);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  z-index: 100;
  font-weight: 600;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
}

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

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  backdrop-filter: blur(12px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--border);
  background: var(--nav-bg-solid);
}

.nav__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}
.nav__progress span {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px var(--accent-glow-strong);
  will-change: transform;
}

.nav__inner {
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  color: var(--text);
}
.nav__brand span {
  color: var(--accent);
}

.nav__links {
  display: flex;
  gap: 4px;
  align-items: center;
  margin-left: auto;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease,
    transform 0.2s ease;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-1px);
}
.theme-toggle .icon {
  width: 18px;
  height: 18px;
  grid-area: 1 / 1;
  transition: transform 0.3s ease, opacity 0.25s ease;
}
.theme-toggle .icon-moon,
:root[data-theme="light"] .theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(-70deg) scale(0.5);
}
:root[data-theme="light"] .theme-toggle .icon-moon {
  opacity: 1;
  transform: none;
}

.nav__links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 8px 13px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
}
.nav__links a:hover {
  color: var(--text);
  background: var(--bg-card);
}
.nav__links a.is-active {
  color: var(--accent);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav__toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Layout / sections
   ========================================================================== */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 22px;
}

.section__head {
  margin-bottom: 40px;
}
.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 10px;
}
.section__title {
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(90px, 16vh, 170px) 22px clamp(70px, 12vh, 120px);
  min-height: 82vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero__badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 10px var(--accent-2);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.hero__name {
  font-size: clamp(2.6rem, 8vw, 5rem);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1.02;
  background: linear-gradient(180deg, var(--hero-grad-1) 0%, var(--hero-grad-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 20px;
}

.hero__tagline {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.4vw, 1.25rem);
  color: var(--accent);
  margin-bottom: 16px;
  max-width: 40ch;
}

.hero__location {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 38px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: var(--bg-card);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease,
    box-shadow 0.2s ease, color 0.2s ease;
}
.btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: var(--bg-card-hover);
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: var(--on-accent);
  border-color: transparent;
}
.btn--primary:hover {
  box-shadow: 0 10px 30px -8px var(--accent);
  background: linear-gradient(135deg, var(--accent-strong) 0%, var(--accent-2) 100%);
}
.btn__arrow {
  transition: transform 0.2s ease;
}
.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ==========================================================================
   About
   ========================================================================== */
.about__body {
  max-width: 68ch;
}
.about__body p {
  color: var(--text-muted);
  margin: 0 0 18px;
  font-size: 1.02rem;
}
.about__body p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Skills
   ========================================================================== */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.skill-group:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
}
.skill-group__name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.skill-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip {
  font-size: 0.88rem;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  padding: 7px 14px;
  border-radius: 999px;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.skill-group:hover .chip {
  border-color: var(--border-strong);
}
.chip:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* ==========================================================================
   Projects
   ========================================================================== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}
.project {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.project:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.project--featured {
  grid-column: 1 / -1;
  padding: 36px;
  background:
    linear-gradient(135deg, var(--accent-wash), transparent 55%),
    var(--bg-card);
  border-color: var(--border-strong);
}
.project--featured::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), transparent);
}
.project__top {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.project__name {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-2);
  border: 1px solid var(--accent-2-border);
  background: var(--accent-2-soft);
  padding: 4px 10px;
  border-radius: 999px;
}
.status .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px var(--accent-2);
  animation: pulse 2.4s ease-in-out infinite;
}
.project__desc {
  color: var(--text-muted);
  margin: 0 0 20px;
  max-width: 62ch;
}
.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 24px;
}
.project__tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Achievements
   ========================================================================== */
.ach__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.ach {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
  text-align: left;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: border-left-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.ach--clickable {
  cursor: pointer;
}
.ach:hover {
  border-left-color: var(--accent);
  transform: translateX(4px);
  background: var(--bg-card-hover);
}
.ach__more {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  transition: color 0.25s ease;
}
.ach__more span {
  display: inline-block;
  transition: transform 0.25s ease;
}
.ach--clickable:hover .ach__more {
  color: var(--accent);
}
.ach--clickable:hover .ach__more span {
  transform: translateX(4px);
}

/* ==========================================================================
   Modal / pop-up
   ========================================================================== */
body.modal-open {
  overflow: hidden;
}
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--overlay);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal.is-open {
  opacity: 1;
  visibility: visible;
}
.modal__dialog {
  position: relative;
  width: 100%;
  max-width: 500px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  background:
    linear-gradient(135deg, var(--accent-wash), transparent 55%),
    var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 34px 32px 32px;
  box-shadow: var(--shadow);
  transform: translateY(16px) scale(0.97);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal.is-open .modal__dialog {
  transform: none;
}
.modal__dialog::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), transparent);
}
.modal__close {
  position: absolute;
  top: 14px;
  right: 16px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.modal__close:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
}
.modal__tag {
  margin-bottom: 14px;
}
.modal__title {
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  padding-right: 40px;
}
.modal__detail {
  margin: 6px 0 18px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
}
.modal__info {
  margin: 0;
  color: var(--text-muted);
  font-size: 1rem;
}
.modal__gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-top: 22px;
}
.modal__gallery:empty {
  display: none;
}
.modal__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.modal__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
/* A lone image is shown whole rather than cropped to a tile. */
.modal__gallery.is-single {
  grid-template-columns: 1fr;
}
.modal__gallery.is-single .modal__image {
  aspect-ratio: auto;
  object-fit: contain;
  max-height: 320px;
}
.modal__doc {
  display: block;
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-elev);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.modal__doc:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 26px -12px var(--accent);
}
.modal__pdf {
  display: block;
  width: 100%;
  height: 190px;
  border: 0;
  background: #fff;
  pointer-events: none;
}
.modal__gallery.is-single .modal__pdf {
  height: 330px;
}
.modal__doc-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.modal__doc:hover .modal__doc-label {
  color: var(--accent);
}
.modal__doc-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.modal__figure figcaption {
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--text-dim);
}

.modal__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.modal__actions:empty {
  display: none;
}
.ach__tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 3px 9px;
  border-radius: 5px;
}
.ach__title {
  font-size: 1.02rem;
  font-weight: 600;
}
.ach__detail {
  font-size: 0.88rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Education / Certifications (timeline + list)
   ========================================================================== */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.edu {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.edu:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.edu__institution {
  font-size: 1.15rem;
  font-weight: 600;
}
.edu__qualification {
  color: var(--text-muted);
  font-size: 0.96rem;
  margin-top: 4px;
}
.edu__period {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  white-space: nowrap;
  align-self: center;
}

.certs__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.cert {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.cert--clickable {
  cursor: pointer;
}
.cert:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}
.cert__body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.cert__body p {
  margin: 0;
}
.cert__more {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  transition: color 0.25s ease;
}
.cert__more span {
  display: inline-block;
  transition: transform 0.25s ease;
}
.cert--clickable:hover .cert__more {
  color: var(--accent);
}
.cert--clickable:hover .cert__more span {
  transform: translateX(4px);
}
.cert--clickable:hover .cert__icon {
  background: var(--accent-glow-strong);
}
.cert__icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  color: var(--accent);
}
.cert__name {
  font-weight: 600;
  font-size: 0.98rem;
}
.cert__issuer {
  font-size: 0.84rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact {
  text-align: center;
  background:
    radial-gradient(600px 300px at 50% 0%, var(--accent-glow), transparent 70%),
    var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(40px, 7vw, 70px) 28px;
}
.contact__intro {
  color: var(--text-muted);
  max-width: 52ch;
  margin: 0 auto 32px;
  font-size: 1.05rem;
}
.contact__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 460px;
  margin: 0 auto;
}
.contact-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  color: var(--text);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease,
    box-shadow 0.2s ease, color 0.2s ease;
}
.contact-item:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 26px -12px var(--accent);
}
.contact-item__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  transition: color 0.2s ease;
}
.contact-item:hover .contact-item__label {
  color: var(--accent);
}
.contact-item__value {
  font-size: 1rem;
  font-weight: 500;
  word-break: break-word;
  text-align: right;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 22px 60px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-family: var(--font-mono);
}

/* ==========================================================================
   Scroll reveal animation
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 720px) {
  .nav__toggle {
    display: flex;
  }
  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 18px 22px;
    background: var(--nav-bg-mobile);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-140%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
  }
  .nav__links.is-open {
    transform: translateY(0);
  }
  .nav__links a {
    padding: 12px 14px;
    font-size: 1rem;
  }
  .section {
    padding: 72px 20px;
  }
  .edu {
    flex-direction: column;
    gap: 8px;
  }
  .edu__period {
    align-self: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}