/* ===== Custom Properties ===== */
:root {
  --bg: #ffffff;
  --bg-alt: #f4f5f7;
  --text: #102a36;
  --text-secondary: #5b6670;
  --accent: #1aa6c1;
  --accent-dark: #0e3d4a;
  --card-bg: #ffffff;
  --card-border: rgba(16, 42, 54, 0.08);
  --shadow: 0 1px 2px rgba(16, 42, 54, 0.04);
  --shadow-lg: 0 12px 30px rgba(16, 42, 54, 0.08);
  --header-bg: rgba(255, 255, 255, 0.85);
  --radius: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

[data-theme="dark"] {
  --bg: #0c1418;
  --bg-alt: #101b20;
  --text: #eef3f5;
  --text-secondary: #93a3ab;
  --accent: #2bc4e2;
  --accent-dark: #0e3d4a;
  --card-bg: #131f25;
  --card-border: rgba(255, 255, 255, 0.07);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(12, 20, 24, 0.85);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 4rem; }

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

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

.section { padding: 6rem 0; }
.section--alt { background: var(--bg-alt); }

.section__eyebrow {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-align: center;
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  max-width: 700px;
  margin: 0 auto 1rem;
}

.section__subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 3rem;
}

.portfolio__wip {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.7;
  margin-top: -2rem;
  margin-bottom: 3rem;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.75rem;
}

.nav__logo {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text);
  font-family: var(--mono);
  letter-spacing: 0.05em;
}

.nav__menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav__link {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition);
}
.nav__link:hover { color: var(--accent); }

.nav__actions { display: flex; align-items: center; gap: 0.5rem; }

.btn-icon {
  background: none;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-icon:hover { background: var(--bg-alt); color: var(--accent); }
.btn-icon svg { width: 16px; height: 16px; }

[data-theme="dark"] .btn-icon { color: #eef3f5; border-color: rgba(255,255,255,0.2); }
[data-theme="dark"] .btn-icon svg { stroke: #eef3f5; }

.lang-label { font-size: 0.7rem; font-weight: 700; font-family: var(--mono); }

.nav__toggle { display: none; }

.icon--sun { display: none; }
[data-theme="dark"] .icon--sun { display: block; }
[data-theme="dark"] .icon--moon { display: none; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(26, 166, 193, 0.15), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(14, 61, 74, 0.2), transparent 50%),
    linear-gradient(135deg, var(--accent-dark), var(--bg));
  z-index: -1;
}

[data-theme="dark"] .hero__bg {
  background:
    radial-gradient(circle at 20% 20%, rgba(43, 196, 226, 0.12), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(43, 196, 226, 0.08), transparent 50%),
    var(--bg);
}

.hero__content {
  text-align: center;
  padding: 6rem 1.5rem 3rem;
  max-width: 800px;
}

.hero__eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
}

.hero__name {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  color: var(--text);
}

[data-theme="dark"] .hero__name,
.hero__bg ~ .hero__content .hero__name { color: #fff; }

.hero__role {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  margin-bottom: 2.5rem;
  letter-spacing: 0.02em;
}

[data-theme="dark"] .hero__role { color: var(--text-secondary); }

.hero__sep { margin: 0 0.75rem; opacity: 0.5; }

.hero__scroll {
  display: inline-block;
  border: 1.5px solid rgba(255,255,255,0.35);
  color: #fff;
  padding: 0.65rem 1.5rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all var(--transition);
  margin-bottom: 3rem;
}
.hero__scroll:hover { background: rgba(255,255,255,0.1); color: #fff; }

[data-theme="dark"] .hero__scroll { border-color: var(--card-border); color: var(--text); }
[data-theme="dark"] .hero__scroll:hover { background: var(--card-bg); }


/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition);
  border: 1.5px solid transparent;
  cursor: pointer;
}

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

.btn--outline {
  border-color: var(--card-border);
  color: var(--text);
}
.btn--outline:hover { border-color: var(--accent); color: var(--accent); }

/* ===== About ===== */
.about__intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  max-width: 760px;
  margin: 0 auto 3.5rem;
  text-align: center;
}

.about__intro-text { display: flex; flex-direction: column; gap: 0.9rem; padding-top: 0.5rem; }

.about__avatar {
  flex-shrink: 0;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent);
  align-self: center;
}

.about__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.about__intro p { color: var(--text-secondary); }

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.profile-card h3, .skills-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.profile-card__tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.profile-list { display: flex; flex-direction: column; gap: 0.85rem; }

.profile-list__row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--card-border);
  font-size: 0.9rem;
}

.profile-list__row dt {
  color: var(--text-secondary);
  font-weight: 600;
  white-space: nowrap;
}

.profile-list__row dd { text-align: right; }

.skill-bar { margin-bottom: 1.1rem; }

.skill-bar__head {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.skill-bar__head span:last-child {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.skill-bar__track {
  height: 6px;
  background: var(--bg-alt);
  border-radius: 999px;
  overflow: hidden;
}

.skill-bar__fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  border-radius: 999px;
  animation: fillBar 1.2s ease forwards;
  animation-delay: 0.2s;
}

@keyframes fillBar {
  to { width: var(--pct); }
}

.about__cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== Timeline ===== */
.timeline-group__title {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 3rem 0 1.5rem;
}

.timeline-group__title:first-of-type { margin-top: 0; }

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

.timeline__item {
  display: grid;
  grid-template-columns: 170px 40px 1fr;
  gap: 1.5rem;
  position: relative;
  padding-bottom: 2.25rem;
}

.timeline__item:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 188px;
  top: 40px;
  bottom: 0;
  width: 2px;
  background: var(--card-border);
}

.timeline__date {
  display: flex;
  flex-direction: column;
  text-align: right;
  padding-top: 0.4rem;
}

.timeline__date strong { font-size: 0.95rem; }
.timeline__date span { color: var(--text-secondary); font-size: 0.8rem; font-family: var(--mono); }

.timeline__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-dark);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.timeline__icon svg { width: 18px; height: 18px; }

.timeline__icon--accent { background: var(--accent); }

.timeline__content {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.timeline__content h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.timeline__content p { color: var(--text-secondary); font-size: 0.9rem; }
.timeline__content p em { color: var(--text); font-style: italic; }

.timeline__link {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}
.timeline__link:hover { color: var(--accent-light, var(--accent)); }

/* ===== Stats band ===== */
.stats {
  background: var(--accent-dark);
  padding: 3rem 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem 1rem;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  color: #fff;
}

.stat svg { width: 28px; height: 28px; margin-bottom: 0.75rem; opacity: 0.7; }

.stat__num {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--mono);
  margin-bottom: 0.25rem;
}

.stat__label {
  font-size: 0.8rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Portfolio ===== */
.projects {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.project-card--featured {
  grid-column: span 2;
  background: linear-gradient(135deg, #082830, #0e5060);
  border: none;
  color: #fff;
}
.project-card--featured h3 { color: #fff; }
.project-card--featured p { color: rgba(255,255,255,0.92); }

.project-card__icon { font-size: 2rem; margin-bottom: 1rem; }

.project-card__badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255,255,255,0.2);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.project-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== Project card clickable ===== */
.project-card[data-modal] { cursor: pointer; }
.project-card[data-modal]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.project-card__more {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.project-card--featured .project-card__more { color: rgba(255,255,255,0.75); }

/* ===== Modal ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.modal[hidden] { display: none; }

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal__box {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: calc(var(--radius) * 1.5);
  padding: 3rem;
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modal-in 0.2s cubic-bezier(0.4,0,0.2,1);
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal__close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0.25rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}
.modal__close:hover { color: var(--text); background: var(--bg-alt); }
.modal__close svg { display: block; width: 20px; height: 20px; }

.modal__icon { font-size: 2.5rem; margin-bottom: 1rem; }

.modal__title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1rem;
  padding-right: 2rem;
}

.modal__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.modal__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.modal__tag {
  background: var(--bg-alt);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.modal__links { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 0.5rem; }

/* Modal structured content */
.modal-section { margin-bottom: 1.75rem; }
.modal-section:last-child { margin-bottom: 0; }

.modal-section__title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.modal-section__inst {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.modal-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.modal-list li {
  font-size: 0.85rem;
  line-height: 1.5;
  padding-left: 1rem;
  border-left: 2px solid var(--card-border);
  color: var(--text-secondary);
}

.modal-list li strong { color: var(--text); font-weight: 600; }

.modal-year {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  opacity: 0.8;
  white-space: nowrap;
}

.modal__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  transition: opacity var(--transition);
}
.modal__link:hover { opacity: 0.85; color: #fff; }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.25rem;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.65rem;
  padding: 2rem 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  color: var(--text);
  transition: all var(--transition);
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.contact-card svg { width: 26px; height: 26px; color: var(--accent); }

.contact-card__label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.contact-card__value { font-size: 0.85rem; font-weight: 600; }

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-top: 1px solid var(--card-border);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; }
  .timeline__item { grid-template-columns: 1fr; gap: 0.75rem; }
  .timeline__date { flex-direction: row; justify-content: space-between; text-align: left; }
  .timeline__item:not(:last-child)::before { display: none; }
  .timeline__icon { display: none; }

  .stats__grid { grid-template-columns: repeat(3, 1fr); }

  .projects { grid-template-columns: 1fr 1fr; }
  .project-card--featured { grid-column: span 2; }

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

@media (max-width: 640px) {
  .nav__menu {
    position: fixed;
    top: 3.75rem;
    left: 0;
    width: 100%;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 0;
    gap: 1.25rem;
    border-bottom: 1px solid var(--card-border);
    transform: translateY(-150%);
    transition: transform var(--transition);
  }
  .nav__menu.show { transform: translateY(0); }
  .nav__toggle { display: flex; }

  .section { padding: 4rem 0; }


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

  .projects { grid-template-columns: 1fr; }
  .project-card--featured { grid-column: auto; }

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

  .hero__sep { display: block; margin: 0.5rem 0; }
}