/* ==========================================================================
   Marcelius Surya Wijaya — Portfolio
   Custom design system (light/dark)
   ========================================================================== */

:root {
  --bg: #f6f7fb;
  --bg-alt: #ffffff;
  --bg-soft: #eef0f7;
  --text: #14171f;
  --text-muted: #565c6b;
  --text-faint: #8b91a0;
  --card: #ffffff;
  --card-border: #e6e8f0;
  --border: #e2e4ee;
  --accent: #3d5af1;
  --accent-2: #0fb9b1;
  --accent-soft: rgba(61, 90, 241, 0.1);
  --accent-2-soft: rgba(15, 185, 177, 0.12);
  --danger: #ff6666;
  --shadow: 0 20px 45px -20px rgba(20, 23, 31, 0.18);
  --shadow-sm: 0 8px 20px -12px rgba(20, 23, 31, 0.16);
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --nav-bg: rgba(246, 247, 251, 0.75);
  --code-bg: #10131c;
  --code-text: #cfd6ea;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0a0d15;
  --bg-alt: #10141f;
  --bg-soft: #131826;
  --text: #eef0f6;
  --text-muted: #a2a8ba;
  --text-faint: #6b7182;
  --card: #121726;
  --card-border: #232a3d;
  --border: #232a3d;
  --accent: #6d8bff;
  --accent-2: #22d3c4;
  --accent-soft: rgba(109, 139, 255, 0.14);
  --accent-2-soft: rgba(34, 211, 196, 0.14);
  --danger: #ff8080;
  --shadow: 0 25px 60px -20px rgba(0, 0, 0, 0.55);
  --shadow-sm: 0 10px 25px -12px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(10, 13, 21, 0.7);
  --code-bg: #060810;
  --code-text: #b7c0da;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0d15;
    --bg-alt: #10141f;
    --bg-soft: #131826;
    --text: #eef0f6;
    --text-muted: #a2a8ba;
    --text-faint: #6b7182;
    --card: #121726;
    --card-border: #232a3d;
    --border: #232a3d;
    --accent: #6d8bff;
    --accent-2: #22d3c4;
    --accent-soft: rgba(109, 139, 255, 0.14);
    --accent-2-soft: rgba(34, 211, 196, 0.14);
    --danger: #ff8080;
    --shadow: 0 25px 60px -20px rgba(0, 0, 0, 0.55);
    --shadow-sm: 0 10px 25px -12px rgba(0, 0, 0, 0.5);
    --nav-bg: rgba(10, 13, 21, 0.7);
    --code-bg: #060810;
    --code-text: #b7c0da;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 600; }
p { margin: 0; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

section { position: relative; padding: 108px 0; }
@media (max-width: 768px) {
  section { padding: 72px 0; }
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Section heading ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-title {
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  letter-spacing: -.01em;
  margin-bottom: 12px;
}
.section-sub { color: var(--text-muted); font-size: 1.02rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: .95rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 12px 30px -10px var(--accent-soft);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -10px var(--accent-soft); }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: .85rem; }

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}
.brand {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand .dot { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  font-size: .92rem;
  padding: 9px 16px;
  border-radius: 999px;
  color: var(--text-muted);
  font-weight: 500;
  transition: color .2s ease, background .2s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--bg-soft); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color .2s ease, transform .2s ease;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--accent); transform: rotate(15deg); }
.theme-toggle svg { width: 19px; height: 19px; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  align-items: center; justify-content: center;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 17px; height: 2px;
  background: currentColor;
  position: relative;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; width: 17px; }
.nav-toggle span::after { position: absolute; top: 6px; width: 17px; }
.nav-toggle.active span { background: transparent; }
.nav-toggle.active span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 74px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 10px 24px 20px;
    gap: 2px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  .nav-links.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-links a { padding: 12px 14px; }
  .nav-toggle { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding-top: 168px;
  padding-bottom: 100px;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 640px;
  background:
    radial-gradient(600px 340px at 15% 15%, var(--accent-soft), transparent 60%),
    radial-gradient(500px 320px at 85% 10%, var(--accent-2-soft), transparent 60%);
  filter: blur(10px);
  z-index: -1;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .8fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding-top: 128px; }
  .hero-photo-wrap { order: -1; width: 210px; margin: 0 auto; }
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px 7px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  font-size: .82rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}
.hero-kicker .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 0 var(--accent-2-soft);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(15,185,177,.5); }
  70% { box-shadow: 0 0 0 8px rgba(15,185,177,0); }
  100% { box-shadow: 0 0 0 0 rgba(15,185,177,0); }
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin-bottom: 18px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-role {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 20px;
  min-height: 1.6em;
}
.hero-role .cursor { color: var(--accent); }
.hero-desc {
  color: var(--text-muted);
  font-size: 1.02rem;
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 22px; }
.hero-meta div { display: flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--text-muted); }
.hero-meta svg { width: 16px; height: 16px; color: var(--accent); flex-shrink: 0; }

.hero-photo-wrap {
  position: relative;
  width: 100%;
  max-width: 340px;
  margin-left: auto;
  aspect-ratio: 1;
}
.hero-photo-ring {
  position: absolute; inset: -14px;
  border-radius: 32px;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-2), var(--accent));
  opacity: .55;
  filter: blur(2px);
  animation: spin 10s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero-photo {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 6px solid var(--bg);
  box-shadow: var(--shadow);
}
.hero-photo img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 1; }

/* ---------- Stat strip ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.stats div {
  background: var(--card);
  padding: 26px 20px;
  text-align: center;
}
.stats strong { display: block; font-size: 1.5rem; margin-bottom: 4px; color: var(--accent); }
.stats span { font-size: .82rem; color: var(--text-muted); }
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Cards (generic) ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* ---------- Experience ---------- */
.timeline { display: flex; flex-direction: column; gap: 26px; }
.exp-card {
  padding: 32px;
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 26px;
}
@media (max-width: 700px) { .exp-card { grid-template-columns: 1fr; } }
.exp-logo {
  width: 88px; height: 88px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}
.exp-logo img { width: 100%; height: 100%; object-fit: cover; }
.exp-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.exp-company { font-size: 1.2rem; font-weight: 600; }
.exp-duration { font-size: .85rem; color: var(--text-faint); }
.exp-location { color: var(--text-muted); font-size: .88rem; margin-bottom: 18px; }
.exp-role {
  border-left: 2px solid var(--border);
  padding-left: 18px;
  margin-top: 18px;
  position: relative;
}
.exp-role::before {
  content: "";
  position: absolute;
  left: -6px; top: 4px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.exp-role-title { font-weight: 600; font-size: 1.02rem; margin-bottom: 2px; }
.exp-role-sub { font-size: .84rem; color: var(--text-faint); margin-bottom: 10px; }
.exp-bullets { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.exp-bullets li { display: flex; gap: 10px; color: var(--text-muted); font-size: .93rem; }
.exp-bullets li::before { content: "▸"; color: var(--accent-2); flex-shrink: 0; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag {
  font-size: .78rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
@media (max-width: 860px) { .project-grid { grid-template-columns: 1fr; } }
.project-card {
  padding: 34px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease;
}
.project-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.project-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.project-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.project-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  flex-shrink: 0;
}
.project-icon svg { width: 26px; height: 26px; }
.badge-private {
  font-size: .72rem;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--accent-2-soft);
  color: var(--accent-2);
  font-weight: 600;
  white-space: nowrap;
  display: flex; align-items: center; gap: 5px;
}
.badge-private svg { width: 12px; height: 12px; }
.project-card h3 { font-size: 1.25rem; margin-bottom: 6px; }
.project-org { font-size: .84rem; color: var(--text-faint); margin-bottom: 14px; }
.project-desc { color: var(--text-muted); font-size: .94rem; margin-bottom: 16px; }
.project-highlights { display: flex; flex-direction: column; gap: 7px; margin-bottom: 20px; }
.project-highlights li { display: flex; gap: 9px; font-size: .89rem; color: var(--text-muted); }
.project-highlights li::before { content: "✓"; color: var(--accent-2); font-weight: 700; flex-shrink: 0; }
.project-card .tag-row { margin-top: auto; padding-top: 6px; }

/* ---------- Skills ---------- */
.skills-groups { display: flex; flex-direction: column; gap: 26px; }
.skill-group-label { font-weight: 600; font-size: .95rem; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.skill-group-label .dotcolor { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.skill-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.skill-chip {
  padding: 9px 16px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--card-border);
  font-size: .87rem;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: border-color .2s ease, transform .2s ease;
}
.skill-chip:hover { border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Organizations ---------- */
.org-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
@media (max-width: 860px) { .org-grid { grid-template-columns: 1fr; } }
.org-card { padding: 30px; display: flex; flex-direction: column; }
.org-logo { width: 64px; height: 64px; border-radius: 14px; overflow: hidden; margin-bottom: 18px; border: 1px solid var(--border); background: var(--bg-soft); }
.org-logo img { width: 100%; height: 100%; object-fit: cover; }
.org-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.org-card p { color: var(--text-muted); font-size: .92rem; margin-bottom: 20px; }
.org-card .btn { align-self: flex-start; margin-top: auto; }

/* ---------- Volunteering ---------- */
.volunteer-list { display: flex; flex-direction: column; }
.volunteer-item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}
.volunteer-item:last-child { border-bottom: none; }
.volunteer-num {
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.volunteer-item h4 { font-size: 1rem; margin-bottom: 8px; }
.volunteer-item ul { display: flex; flex-direction: column; gap: 5px; }
.volunteer-item li { font-size: .89rem; color: var(--text-muted); display: flex; gap: 8px; }
.volunteer-item li::before { content: "•"; color: var(--accent-2); }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card { padding: 40px; }
.contact-card h3 { font-size: 1.5rem; margin-bottom: 14px; }
.contact-card p { color: var(--text-muted); margin-bottom: 26px; }
.contact-info { display: flex; flex-direction: column; gap: 4px; }
.contact-row {
  display: flex; align-items: center; gap: 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--border);
}
.contact-row:last-child { border-bottom: none; }
.contact-row .icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-row .icon svg { width: 19px; height: 19px; }
.contact-row .label { font-size: .78rem; color: var(--text-faint); margin-bottom: 2px; }
.contact-row .value { font-size: .96rem; font-weight: 500; }

/* ---------- Footer ---------- */
.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .85rem;
  color: var(--text-faint);
}
.site-footer .socials { display: flex; gap: 14px; }
.site-footer .socials a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s ease, color .2s ease, transform .2s ease;
}
.site-footer .socials a:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.site-footer .socials svg { width: 17px; height: 17px; }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease, border-color .2s ease;
  z-index: 900;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { border-color: var(--accent); color: var(--accent); }
.back-to-top svg { width: 18px; height: 18px; }

/* ---------- Sub page (Organization detail pages) ---------- */
.subpage-hero { padding-top: 150px; }
.subpage-card { padding: 44px; display: grid; grid-template-columns: 200px 1fr; gap: 40px; align-items: start; }
@media (max-width: 760px) { .subpage-card { grid-template-columns: 1fr; } }
.subpage-logo { width: 100%; border-radius: 18px; overflow: hidden; border: 1px solid var(--border); }
.subpage-card h1 { font-size: 1.9rem; margin-bottom: 16px; }
.subpage-card .intro { color: var(--text-muted); margin-bottom: 24px; }
.role-block { margin-bottom: 22px; }
.role-block:last-child { margin-bottom: 0; }
.role-block .role-title { font-weight: 600; margin-bottom: 2px; }
.role-block .role-date { font-size: .82rem; color: var(--text-faint); margin-bottom: 10px; }
.role-block ul { display: flex; flex-direction: column; gap: 6px; }
.role-block li { font-size: .92rem; color: var(--text-muted); display: flex; gap: 8px; }
.role-block li::before { content: "•"; color: var(--accent-2); }
.back-link { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 28px; color: var(--text-muted); font-size: .9rem; }
.back-link:hover { color: var(--accent); }