/* ============================================================
   PORTFOLIO — Weka/Detached
   Dark / minimal theme
   ============================================================ */

/* ─── Design tokens ──────────────────────────────────────── */
:root {
  /* Colours */
  --bg:          #0f0f0f;
  --bg-alt:      #141414;
  --surface:     #1c1c1c;
  --border:      #252525;
  --text:        #e4e4e4;
  --text-muted:  #7a7a7a;
  --accent:      #60a5fa;        /* sky blue — Kyan/Premia palette */
  --accent-dim:  rgba(96, 165, 250, 0.08);

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Layout */
  --max-w:     1100px;
  --nav-h:     64px;

  /* Spacing scale */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-6: 1.5rem;
  --s-8: 2rem;
  --s-12: 3rem;
  --s-16: 4rem;
  --s-24: 6rem;

  /* Misc */
  --radius:     6px;
  --radius-lg:  12px;
  --transition: 0.22s ease;
  --shadow:     0 4px 24px rgba(0, 0, 0, 0.5);
}

/* ─── Reset & base ───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

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

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

ul {
  list-style: none;
}

/* ─── Utility ────────────────────────────────────────────── */
.mono        { font-family: var(--font-mono); }
.accent      { color: var(--accent); }
.container   { max-width: var(--max-w); margin-inline: auto; padding-inline: var(--s-6); }

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #0a0a0a;
  border: 1px solid var(--accent);
}
.btn--primary:hover {
  background: transparent;
  color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn--ghost:hover {
  background: var(--accent-dim);
}

.btn--sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.78rem;
}

/* ─── Navigation ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: var(--nav-h);
  padding-inline: var(--s-8);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.nav__right  { display: flex; align-items: center; gap: var(--s-4); }
.nav__sep    { width: 1px; height: 18px; background: var(--border); flex-shrink: 0; }
.nav__social { display: flex; align-items: center; gap: var(--s-4); }

.nav.scrolled {
  background: rgba(15, 15, 15, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}

.nav__logo {
  flex: 1;
  display: flex;
  align-items: center;
  position: relative;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.01em;
}

.nav__logo-content {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  position: relative;
}

.nav__logo-name {
  transition: filter var(--transition), opacity var(--transition);
}
.nav__logo:hover .nav__avatar,
.nav__logo:hover .nav__logo-name {
  filter: blur(3px);
  opacity: 0.35;
}

.nav__logo-quote {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-style: italic;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.nav__logo:hover .nav__logo-quote { opacity: 1; }

.nav__avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
  transition: border-color var(--transition), filter var(--transition), opacity var(--transition);
}

.nav__links {
  display: flex;
  gap: var(--s-6);
}

.nav__link {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav__link:hover,
.nav__link.active {
  color: var(--accent);
}
.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__social-link {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav__social-link:hover { color: var(--accent); }

.nav__social-link--soon {
  position: relative;
  cursor: default;
}
.nav__social-link--soon:hover { color: var(--text-muted); }

.nav__tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.2rem 0.55rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.nav__social-link--soon:hover .nav__tooltip { opacity: 1; }

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), width var(--transition);
  width: 100%;
  transform-origin: center;
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─── Hero ───────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 60svh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + var(--s-6)) var(--s-8) var(--s-4);
  max-width: var(--max-w);
  margin-inline: auto;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  background:
    radial-gradient(ellipse 60% 55% at 25% 0%, rgba(100, 255, 218, 0.09) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--s-12);
  align-items: center;
}

.hero__greeting {
  display: block;
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: var(--s-4);
  letter-spacing: 0.05em;
}

.hero__name-row {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  margin-bottom: var(--s-4);
}

.hero__avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.hero__name {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: #ffffff;
}

.hero__tagline {
  font-family: var(--font-mono);
  font-size: clamp(0.8rem, 1.8vw, 1rem);
  color: var(--text-muted);
  margin-bottom: var(--s-6);
}

.hero__bio {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  background: radial-gradient(ellipse at 20% 50%, rgba(96, 165, 250, 0.08) 0%, transparent 70%);
  border-radius: var(--radius-lg);
  padding: var(--s-6);
  box-shadow: 0 0 48px rgba(96, 165, 250, 0.07), 0 0 96px rgba(96, 165, 250, 0.04);
}

.hero__bio li {
  position: relative;
  padding-left: var(--s-6);
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.hero__bio li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.9rem;
  top: 0.1em;
}

.hero__bio-stat {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 500;
}

.hero__stats {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  margin-bottom: var(--s-8);
  flex-wrap: wrap;
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero__stat-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.hero__stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero__stat-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
  flex-shrink: 0;
}

.hero__cta {
  display: flex;
  gap: var(--s-4);
  flex-wrap: wrap;
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--s-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
  opacity: 0.4;
  transition: opacity var(--transition);
}
.hero__scroll:hover { opacity: 0.8; }
.hero__scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(0.6) translateY(10px); }
}

/* ─── Sections ───────────────────────────────────────────── */
.section {
  padding-block: var(--s-16);
}
.section--alt {
  background: var(--bg-alt);
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: var(--s-4);
  margin-bottom: var(--s-12);
}

.section__label {
  display: block;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.section__title {
  font-size: clamp(1.2rem, 2.5vw, 1.7rem);
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.02em;
}

/* ─── About ──────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--s-12);
  align-items: start;
}

.about__photo-frame {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}

.about__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: filter 0.4s ease, transform 0.4s ease;
}

.about__photo-frame:hover .about__img {
  filter: blur(5px);
  transform: scale(1.03);
}

.about__photo-hover {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.95rem;
  color: #fff;
  letter-spacing: 0.01em;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 1;
  padding: var(--s-4);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
}

.about__photo-frame:hover .about__photo-hover {
  opacity: 1;
}

/* Shown when image fails to load */
.about__photo-frame--empty .about__img { display: none; }
.about__photo-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: var(--s-4);
  line-height: 1.5;
}
.about__photo-frame--empty .about__photo-placeholder { display: flex; }

.about__text p {
  color: var(--text-muted);
  margin-bottom: var(--s-4);
  font-size: 1.02rem;
  max-width: 580px;
}

.about__links {
  display: flex;
  gap: var(--s-3);
  margin-top: var(--s-6);
  flex-wrap: wrap;
}

/* ─── Projects ───────────────────────────────────────────── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--s-6);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(100, 255, 218, 0.07);
}

/* Card image area */
.card__img-wrap {
  position: relative;
  height: 68px;
  overflow: hidden;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-3) var(--s-6);
  border-bottom: 1px solid var(--border);
}
.card__img {
  width: auto;
  height: auto;
  max-height: 36px;
  max-width: 55%;
  object-fit: contain;
  transition: opacity 0.3s ease, filter 0.3s ease;
}
.card:hover .card__img { opacity: 0.6; filter: blur(4px); }

/* Image placeholder when src missing */
.card__img-wrap--empty .card__img { display: none; }
.card__img-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: var(--s-4);
  line-height: 1.6;
  border-bottom: 1px solid var(--border);
}
.card__img-wrap--empty .card__img-placeholder { display: flex; }

/* Overlay with links */
.card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover .card__overlay { opacity: 1; }

.card__body {
  padding: var(--s-6);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
}

.card__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.card__desc li {
  padding-left: 1.1em;
  position: relative;
  margin-bottom: 0.35em;
}

.card__desc li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ─── Tags ───────────────────────────────────────────────── */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: auto;
  padding-top: var(--s-3);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(100, 255, 218, 0.15);
  border-radius: var(--radius);
  padding: 0.2rem 0.55rem;
}

/* ─── Skills ─────────────────────────────────────────────── */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--s-6);
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--s-6);
  transition: border-color var(--transition);
}
.skill-group:hover { border-color: var(--accent); }

.skill-group__heading {
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--s-4);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.skill-list li {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding: var(--s-2) 0;
  border-bottom: 1px solid var(--border);
}
.skill-list li:last-child { border-bottom: none; }

/* ─── Contact ────────────────────────────────────────────── */
#contact {
  padding-block: var(--s-8);
}

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

.contact__container .section__header {
  margin-bottom: var(--s-6);
}

.contact__body {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--s-12);
  align-items: center;
}

.contact__divider {
  width: 1px;
  align-self: stretch;
  background: var(--border);
}

.contact__spotify {
  width: 100%;
}

.contact__spotify-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--s-3);
}

.contact__spotify-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact__spotify-btns {
  display: flex;
  gap: var(--s-2);
}

.contact__spotify-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: color var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.contact__spotify-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.contact__spotify-btn.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: rgba(100, 255, 218, 0.15);
}
.contact__spotify-btn.active:hover {
  box-shadow: 0 0 10px rgba(100, 255, 218, 0.25);
  border-color: rgba(100, 255, 218, 0.35);
}
.contact__spotify-btn.active:hover span[aria-hidden] {
  color: #ffffff;
  transition: color var(--transition);
}

.contact__intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: var(--s-6);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.contact__item {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  padding: var(--s-4) var(--s-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}
.contact__item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.contact__item-label {
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  min-width: 64px;
}

.contact__item-value {
  font-size: 0.92rem;
  color: var(--text);
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: var(--s-8);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ─── Scroll-reveal animation ────────────────────────────── */
[data-animate] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].visible {
  opacity: 1;
  transform: none;
}

/* Staggered delay for grid children */
[data-animate]:nth-child(2) { transition-delay: 0.1s; }
[data-animate]:nth-child(3) { transition-delay: 0.2s; }
[data-animate]:nth-child(4) { transition-delay: 0.3s; }
[data-animate]:nth-child(5) { transition-delay: 0.4s; }

/* ─── Mobile ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: rgba(15, 15, 15, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--s-8);
    transform: translateY(-100%);
    visibility: hidden;
    transition: transform var(--transition), visibility var(--transition);
  }
  .nav__links.open {
    transform: translateY(0);
    visibility: visible;
  }
  .nav__link {
    font-size: 1.1rem;
  }
  .nav__toggle {
    display: flex;
  }

  .nav {
    gap: var(--s-4);
    padding-inline: var(--s-6);
  }

  .nav__sep {
    display: none;
  }

  .hero {
    padding-inline: var(--s-6);
    padding-top: calc(var(--nav-h) + var(--s-4));
  }
  .hero__content {
    grid-template-columns: 1fr;
    gap: var(--s-8);
  }
  .hero__name {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .about__grid {
    grid-template-columns: 1fr;
  }
  .about__photo-frame {
    max-width: 200px;
  }

  .section {
    padding-block: var(--s-16);
  }

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

  .contact__divider {
    display: none;
  }

}

@media (max-width: 480px) {
  .hero__cta {
    flex-direction: column;
    align-items: flex-start;
  }

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