/* ==========================================================================
   WISNU.DEV — Personal Portfolio
   Implemented from Google Stitch design (source of truth)
   ========================================================================== */

:root {
  /* Colors */
  --bg: #0a0e14;
  --bg-alt: #0d1219;
  --surface: #131a24;
  --surface-border: #232c3a;
  --accent: #5eb9f7;
  --accent-strong: #38bdf8;
  --text-primary: #f4f7fb;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Typography */
  --font-heading: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --container-width: 1180px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  /* Motion */
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

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

ul, dl, dd { margin: 0; padding: 0; }

.accent { color: var(--accent-strong); }

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

/* Focus visibility for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background-color var(--transition), border-color var(--transition);
}

.btn--primary {
  background-color: var(--accent-strong);
  color: #06141f;
}

.btn--primary:hover {
  background-color: #7cc9f9;
  transform: translateY(-1px);
}

.btn--outline {
  background-color: transparent;
  border-color: var(--surface-border);
  color: var(--text-primary);
}

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

.btn--sm {
  padding: 9px 20px;
  font-size: 0.85rem;
}

/* ==========================================================================
   Navbar
   ========================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--surface-border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}

.navbar__logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 0 auto;
}

.nav-link {
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 2px;
  transition: color var(--transition);
}

.nav-link:hover { color: var(--text-primary); }

.nav-link.active {
  color: var(--accent-strong);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background-color: var(--accent-strong);
  border-radius: 2px;
}

.navbar__cta { flex-shrink: 0; }

.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.navbar__toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.navbar__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__toggle.is-open span:nth-child(2) { opacity: 0; }
.navbar__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding: 96px 0 120px;
  overflow: hidden;
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(94, 185, 247, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(94, 185, 247, 0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at top left, black 0%, transparent 65%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  line-height: 1.1;
  margin: 0 0 20px;
  font-weight: 700;
}

.hero__subtitle {
  font-size: 1.15rem;
  font-weight: 500;
  color: #cbd5e1;
  margin: 0 0 18px;
}

.hero__desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 46ch;
  margin: 0 0 32px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero__media {
  position: relative;
}

.hero__image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  object-fit: cover;
  aspect-ratio: 4 / 3.2;
}

/* ==========================================================================
   Sections & headings
   ========================================================================== */

.section {
  padding: 88px 0;
}

.section__title {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  margin: 0 0 40px;
}

.section__bar {
  display: inline-block;
  width: 4px;
  height: 1.1em;
  background-color: var(--accent-strong);
  border-radius: 2px;
}

/* ==========================================================================
   Cards (shared)
   ========================================================================== */

.card {
  background-color: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 20px;
}

.card__text {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin: 0 0 24px;
}

/* ==========================================================================
   About / Biodata
   ========================================================================== */

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.biodata-list__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--surface-border);
}

.biodata-list__row:last-child { border-bottom: none; }

.biodata-list__row dt {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.biodata-list__row dd {
  font-size: 0.95rem;
  color: var(--text-primary);
  text-align: right;
}

.pill-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background-color: rgba(94, 185, 247, 0.1);
  color: var(--accent);
  border: 1px solid rgba(94, 185, 247, 0.25);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.pill-flow__arrow {
  color: var(--text-muted);
}

/* ==========================================================================
   Education timeline
   ========================================================================== */

.timeline {
  position: relative;
  padding-left: 56px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--surface-border);
}

.timeline__item {
  position: relative;
  margin-bottom: 28px;
}

.timeline__item:last-child { margin-bottom: 0; }

.timeline__icon {
  position: absolute;
  left: -56px;
  top: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--surface);
  border: 2px solid var(--accent-strong);
  color: var(--accent-strong);
}

.timeline__icon svg { width: 18px; height: 18px; }

.timeline__icon--muted {
  border-color: var(--surface-border);
  color: var(--text-muted);
}

.timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-strong);
  margin-bottom: 10px;
}

.timeline__year--muted { color: var(--text-muted); }

.timeline__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.timeline__desc {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.95rem;
}

/* ==========================================================================
   Hobbies / Interests
   ========================================================================== */

.hobby-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.card--hobby {
  text-align: center;
  padding: 28px 16px;
  transition: transform var(--transition), border-color var(--transition);
}

.card--hobby:hover {
  transform: translateY(-4px);
  border-color: var(--accent-strong);
}

.card--hobby__icon {
  display: block;
  font-size: 2rem;
  margin-bottom: 12px;
}

.card--hobby h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin: 0;
  font-weight: 600;
}

.interest-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ==========================================================================
   Goals
   ========================================================================== */

.card--goal {
  max-width: 720px;
}

/* ==========================================================================
   Gallery
   ========================================================================== */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.gallery-item {
  position: relative;
  padding: 0;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--surface);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition);
}

.gallery-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent-strong);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(6, 9, 14, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition);
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__image {
  max-width: min(90vw, 900px);
  max-height: 85vh;
  border-radius: var(--radius-md);
  border: 1px solid var(--surface-border);
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: 24px;
  right: 28px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 2.2rem;
  line-height: 1;
  cursor: pointer;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 16px;
  background-color: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: transform var(--transition), border-color var(--transition);
}

.contact-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent-strong);
  color: var(--accent-strong);
}

.contact-item__icon { font-size: 1.6rem; }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  border-top: 1px solid var(--surface-border);
  padding: 32px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__logo {
  font-family: var(--font-heading);
  font-weight: 700;
}

.footer__copy {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

.footer__socials {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer__socials a:hover { color: var(--accent-strong); }

/* ==========================================================================
   Scroll-reveal animation
   ========================================================================== */

[data-animate] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__media { order: -1; max-width: 480px; margin: 0 auto; }
  .about__grid { grid-template-columns: 1fr; }
  .hobby-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .navbar__menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background-color: var(--bg-alt);
    border-bottom: 1px solid var(--surface-border);
    padding: 12px 24px 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .navbar__menu.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link { padding: 10px 0; width: 100%; }
  .navbar__toggle { display: flex; }
  .navbar__cta { display: none; }

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

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero { padding: 56px 0 72px; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .section { padding: 64px 0; }
  .card { padding: 24px; }
  .biodata-list__row { flex-direction: column; gap: 4px; }
  .biodata-list__row dd { text-align: left; }
  .hobby-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .gallery-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .footer__inner { flex-direction: column; text-align: center; }
}