/* ==============================================================================
   COMPONENTS - zeshannasir.com
   Stockholm Dusk
   ============================================================================== */

/* --- SITE HEADER --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding-top: env(safe-area-inset-top, 0px);
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 0 0 rgba(255, 255, 255, 0.04);
}

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

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: var(--weight-semibold);
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: transform var(--spring-press);
}

.site-brand:active {
  transform: scale(0.97);
}

.site-brand__mark {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-pill);
  background-color: var(--accent-emerald);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  font-size: 0.85rem;
  font-weight: 450;
  color: var(--text-secondary);
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), transform var(--spring-press);
}

.site-nav__link:active {
  transform: scale(0.96);
}

.site-nav__link.is-active {
  color: var(--text-primary);
  background-color: var(--bg-surface-raised);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: transform var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:active {
  transform: scale(0.92);
}

.theme-toggle svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  padding: 0.4rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: transform var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}


/* --- HERO --- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: clip;
  padding: clamp(4rem, 10vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border-subtle);
}

/* Slow horizon drift: the one orchestrated moment on the page. */
.hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto;
  height: 120%;
  z-index: -1;
  background:
    radial-gradient(40% 45% at 28% 22%, var(--glow-a), transparent 70%),
    radial-gradient(45% 50% at 76% 8%, var(--glow-b), transparent 70%);
  filter: blur(28px);
  animation: horizon 28s ease-in-out infinite alternate;
  pointer-events: none;
}

/* Ledger grid: a faint measuring grid fading out from the top left. */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 85% at 28% 15%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 85% at 28% 15%, #000, transparent 75%);
  pointer-events: none;
}

@keyframes horizon {
  from { transform: translate3d(-3%, 0, 0) scale(1); }
  to { transform: translate3d(4%, 3%, 0) scale(1.08); }
}

@media (prefers-reduced-motion: reduce) {
  .hero::before { animation: none; }
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.hero__status {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  flex-shrink: 0;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: var(--leading-tight);
  color: var(--text-primary);
  background-image: var(--gradient-headline);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 22ch;
  margin-bottom: var(--space-md);
  text-wrap: balance;
}

.hero__accent {
  background-image: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  max-width: 54ch;
  margin-bottom: var(--space-sm);
}


/* --- SECTIONS --- */
.section {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
  border-bottom: 1px solid var(--border-subtle);
  scroll-margin-top: 3.75rem;
}

.section--last {
  border-bottom: none;
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: var(--weight-bold);
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: clamp(2rem, 4vw, 3rem);
}


/* --- WORK ENTRIES --- */
.work-entry {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  box-shadow: var(--highlight-top), var(--shadow-card);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

@media (hover: hover) and (pointer: fine) {
  .work-entry:hover {
    border-color: var(--border-strong);
    box-shadow: var(--highlight-top), 0 16px 44px -8px rgba(0, 0, 0, 0.65);
  }
}

.work-entry--lead {
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  background: linear-gradient(180deg, rgba(21, 26, 39, 0.95) 0%, rgba(15, 19, 29, 0.95) 100%);
  box-shadow: var(--highlight-top), 0 16px 48px -8px rgba(0, 0, 0, 0.75);
}

[data-theme="light"] .work-entry--lead {
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow: var(--highlight-top), 0 10px 32px -4px rgba(15, 23, 42, 0.08);
}

@media (hover: hover) and (pointer: fine) {
  .work-entry--lead:hover {
    border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  }
}

.work-entry--lead::before {
  content: "";
  position: absolute;
  inset: -1px;
  padding: 1px;
  border-radius: inherit;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 75%, transparent), transparent 42%, transparent 70%, color-mix(in srgb, var(--accent) 28%, transparent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.work-entry + .work-entry {
  margin-top: var(--space-xl);
}

.work-entry__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-md);
}

.work-entry__title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.work-entry__tech {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.work-entry__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.detail {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.detail dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--accent);
}

.detail dd {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.detail dd a {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (hover: hover) and (pointer: fine) {
  .detail dd a:hover {
    color: var(--accent);
  }
}


/* Engineering repository / project badge */
.project-badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.5rem;
}

.project-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.38rem 0.8rem;
  background-color: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-primary);
  text-decoration: none;
  max-width: 100%;
  overflow-wrap: anywhere;
  box-shadow: var(--highlight-top);
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--spring-press);
}

.project-badge:active {
  transform: scale(0.97);
}

@media (hover: hover) and (pointer: fine) {
  .project-badge:hover {
    border-color: var(--border-strong);
    color: var(--accent-emerald);
    text-decoration: none;
  }
}


/* --- ENGINEERING DECISIONS --- */
.decisions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 768px) {
  .decisions-grid {
    grid-template-columns: 1fr;
  }
}

.decision-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 2.8vw, 2rem);
  box-shadow: var(--highlight-top), var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--spring-float);
}

@media (hover: hover) and (pointer: fine) {
  .decision-card:hover {
    border-color: color-mix(in srgb, var(--accent) 45%, transparent);
    box-shadow: var(--highlight-top), var(--shadow-hover);
    transform: translateY(-2px);
  }
}

.decision-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--accent) 15%, transparent), transparent 70%);
  transition: opacity var(--transition-normal);
}

@media (hover: hover) and (pointer: fine) {
  .decision-card:hover::after { opacity: 1; }
}

.decision-card__area {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.decision-card__constraint {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: var(--weight-bold);
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  line-height: var(--leading-tight);
}

.decision-card__decision {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}


/* --- ABOUT --- */
.about-block {
  max-width: 62ch;
}

.about__text {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-lg);
}

.about__education {
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.about__ed-line {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --- CONTACT SECTION --- */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.contact-link:focus-visible {
  outline: 2px solid var(--accent-emerald);
  outline-offset: 2px;
}

/* Email address plus its separate copy control */
.contact-email {
  display: inline-flex;
  align-items: stretch;
  gap: 0.35rem;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: transform var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

/* Tactile press feedback on interactive controls */
.theme-toggle:active,
.mobile-toggle:active,
.copy-btn:active,
.contact-link:active {
  transform: scale(0.94);
}

@media (hover: hover) and (pointer: fine) {
  .site-nav__link:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-raised);
  }

  .theme-toggle:hover {
    color: var(--text-primary);
    border-color: var(--border-strong);
    background-color: var(--bg-surface-raised);
  }

  .contact-link:hover {
    border-color: var(--border-strong);
    background-color: var(--bg-surface-raised);
  }

  .copy-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-strong);
    background-color: var(--bg-surface-raised);
  }
}

.copy-btn svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.copy-btn .icon-check { display: none; }
.copy-btn.is-copied { color: var(--accent-emerald); }
.copy-btn.is-copied .icon-copy { display: none; }
.copy-btn.is-copied .icon-check { display: block; }

.copy-status {
  flex-basis: 100%;
  min-height: 1.25rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}


/* --- FOOTER --- */
.site-footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-lg) var(--space-2xl);
  align-items: start;
}

.footer-name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font-family: var(--font-mono);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

@media (hover: hover) and (pointer: fine) {
  .footer-links a:hover {
    color: var(--accent);
    text-decoration-color: var(--accent);
  }
}

.footer-fine {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs) var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.footer-fine > span:last-child::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 0.45rem;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  vertical-align: middle;
}


/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 3.75rem;
    left: 0;
    right: 0;
    z-index: 1000;
    flex-direction: column;
    padding: var(--space-md) var(--container-pad);
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    gap: 0.25rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav__link {
    width: 100%;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  /* Comfortable touch targets */
  .theme-toggle,
  .mobile-toggle {
    width: 2.75rem;
    height: 2.75rem;
  }

  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
  }

  .site-nav__link {
    padding: 0.75rem;
  }

  /* Touch targets: floor every control at 44px on coarse pointers */
  .site-brand {
    min-height: 2.75rem;
  }

  .contact-link {
    min-height: 2.75rem;
  }

  .footer-links a {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
  }

  .copy-btn {
    width: 2.75rem;
  }

}


/* --- PRINT: a clean one-page copy for recruiters and PDF export --- */
@media print {
  :root, [data-theme="light"] {
    --bg-canvas: #ffffff;
    --bg-surface: #ffffff;
    --bg-surface-raised: #ffffff;
    --text-primary: #000000;
    --text-secondary: #222222;
    --text-muted: #444444;
    --accent: #7a3304;
    --border-subtle: #cccccc;
    --border-strong: #999999;
    --shadow-card: none;
    --highlight-top: none;
  }

  body { background: #ffffff; }
  .site-header, .theme-toggle, .copy-btn, .copy-status, .hero::before, .hero::after,
  .decision-card::after, .work-entry--lead::before { display: none !important; }
  .hero__title, .hero__accent { background: none; -webkit-text-fill-color: currentColor; color: #000000; }
  .work-entry, .decision-card { break-inside: avoid; box-shadow: none; }
  .contact-link[href^="http"]::after { content: " " attr(href); }
}