/* ==========================================================================
   Adham Elgohary — Personal Academic Portfolio
   Visual Direction: Dark Slate / Industrial Grey with Neon Red Accents
   ========================================================================== */

:root {
  /* Core Surfaces — Deep Industrial Slate, Gunmetal & Graphite Greys */
  --bg-primary: #0e1014;
  --bg-elevated: #161920;
  --bg-subtle: #1e222b;
  --bg-card: #14171e;

  /* Typography — Crisp Silver Whites & Cool Tech Greys */
  --text-primary: #f2f4f8;
  --text-secondary: #a9b0c0;
  --text-muted: #6c7385;

  /* Primary Accent — High-Energy Neon Red / Electric Crimson */
  --accent: #ff1f44;
  --accent-hover: #ff4766;
  --accent-soft: rgba(255, 31, 68, 0.12);
  --accent-glow: 0 0 20px rgba(255, 31, 68, 0.45);
  --accent-glow-strong: 0 0 32px rgba(255, 31, 68, 0.7);
  --btn-text: #ffffff;

  /* Hairline Borders & Rules */
  --border-hairline: rgba(255, 255, 255, 0.08);
  --border-subtle: #242834;
  --border-strong: rgba(255, 31, 68, 0.6);

  /* Font Stacks — Classic Editorial Serif + Clean Humanist Sans */
  --font-serif: "Newsreader", "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Layout & Spacing */
  --container-max: 1080px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-space: clamp(4.5rem, 8vw, 7.5rem);
}

[data-theme="dark-beige"],
[data-theme="neon-red"] {
  --bg-primary: #0e1014;
  --bg-elevated: #161920;
  --bg-subtle: #1e222b;
  --text-primary: #f2f4f8;
  --text-secondary: #a9b0c0;
  --text-muted: #6c7385;
  --accent: #ff1f44;
  --accent-hover: #ff4766;
  --accent-soft: rgba(255, 31, 68, 0.12);
  --btn-text: #ffffff;
  --border-hairline: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 31, 68, 0.6);
}

/* ==========================================================================
   1. Reset & Base Typography
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: 1.03125rem;
  line-height: 1.72;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  selection-background-color: var(--accent-soft);
}

::selection {
  background-color: var(--accent);
  color: #ffffff;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Skip Link for Keyboard Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  background-color: var(--accent);
  color: var(--btn-text);
  padding: 0.65rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 1000;
}

.skip-link:focus {
  top: 1rem;
}

/* ==========================================================================
   2. Structural Container & Editorial Grid
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.editorial-section {
  padding-block: var(--section-space);
  border-top: 1px solid var(--border-hairline);
}

/* Asymmetrical 2-Column Editorial Layout (Index Column + Content Column) */
.editorial-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}

@media (min-width: 820px) {
  .editorial-grid {
    grid-template-columns: 260px 1fr;
    gap: 4rem;
    align-items: start;
  }
}

.section-meta {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

@media (min-width: 820px) {
  .section-meta {
    position: sticky;
    top: 6rem;
  }
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  text-shadow: 0 0 12px rgba(255, 31, 68, 0.4);
}

.section-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 2.6vw, 2.15rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-primary);
}

.section-note {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-top: 0.25rem;
}

/* ==========================================================================
   3. Top Masthead & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-hairline);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: none;
}

@media (min-width: 640px) {
  .brand-tag {
    display: inline-block;
  }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding-block: 0.25rem;
  border-bottom: 1px solid transparent;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-shadow: 0 0 14px rgba(255, 31, 68, 0.5);
}

.nav-github {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  border: 1px solid var(--border-hairline);
  padding: 0.42rem 0.85rem;
  background-color: transparent;
}

.nav-github:hover {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--accent-soft);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-hairline);
  padding: 0.45rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  cursor: pointer;
}

@media (max-width: 767px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-hairline);
    padding: 1.25rem var(--gutter);
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    display: none;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
    width: 100%;
  }
}

/* ==========================================================================
   4. Hero / Introduction Section
   ========================================================================== */

.hero-section {
  padding-top: clamp(3.5rem, 7vw, 6.5rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: end;
}

@media (min-width: 860px) {
  .hero-grid {
    grid-template-columns: 1.35fr 0.65fr;
    gap: 4.5rem;
  }
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  text-shadow: 0 0 12px rgba(255, 31, 68, 0.4);
}

.hero-kicker::before {
  content: "";
  display: inline-block;
  width: 1.75rem;
  height: 2px;
  background-color: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4.8vw, 4rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1.65rem;
}

.hero-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  text-shadow: 0 0 25px rgba(255, 31, 68, 0.5);
}

.hero-lead {
  font-size: clamp(1.08rem, 1.4vw, 1.22rem);
  line-height: 1.68;
  color: var(--text-secondary);
  max-width: 60ch;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  padding-top: 0.5rem;
}

.btn-editorial {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background-color: var(--accent);
  color: var(--btn-text);
  border: 1px solid var(--accent);
  border-radius: 3px;
  box-shadow: 0 0 18px rgba(255, 31, 68, 0.35);
  transition: all 0.22s ease;
}

.btn-editorial:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 0 28px rgba(255, 31, 68, 0.7);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  border: 1px solid var(--border-hairline);
  background-color: rgba(255, 255, 255, 0.02);
  border-radius: 3px;
  transition: all 0.22s ease;
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--accent-soft);
  box-shadow: 0 0 18px rgba(255, 31, 68, 0.28);
  transform: translateY(-2px);
}

/* Editorial Portrait Frame */
.portrait-frame {
  border: 1px solid rgba(255, 31, 68, 0.35);
  background: linear-gradient(160deg, rgba(22, 25, 32, 0.95), rgba(14, 16, 20, 0.98));
  padding: 0.85rem;
  width: 100%;
  max-width: 340px;
  border-radius: 4px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 30px rgba(255, 31, 68, 0.18);
  transition: all 0.3s ease;
}

.portrait-frame:hover {
  border-color: var(--accent);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7), 0 0 45px rgba(255, 31, 68, 0.35);
}

@media (min-width: 860px) {
  .portrait-frame {
    margin-left: auto;
  }
}

.portrait-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  min-height: 320px;
  overflow: hidden;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-hairline);
  transition: background-color 0.25s ease;
}

.portrait-image {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  /* Unaltered natural photograph with transparent background merged onto var(--bg-primary) */
  filter: none;
}

/* Fallback monogram if local image is not loaded yet */
.portrait-fallback {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  text-align: center;
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
}

.portrait-fallback-monogram {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-style: italic;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.portrait-fallback-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.portrait-caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ==========================================================================
   5. About & Academic Particulars
   ========================================================================== */

.prose {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  max-width: 64ch;
}

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

.prose p.lead-paragraph {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 1.8vw, 1.45rem);
  line-height: 1.55;
  color: var(--text-primary);
}

/* Key-Value Academic Ledger */
.particulars-ledger {
  margin-top: 2.75rem;
  border-top: 1px solid var(--border-hairline);
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .particulars-ledger {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ledger-item {
  padding-block: 1.15rem;
  padding-right: 1.5rem;
  border-bottom: 1px solid var(--border-hairline);
}

.ledger-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.ledger-value {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* ==========================================================================
   6. Current Interests (Numbered Editorial Index)
   ========================================================================== */

.interests-list {
  list-style: none;
  border-top: 1px solid var(--border-hairline);
}

.interest-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  padding-block: 1.65rem;
  border-bottom: 1px solid var(--border-hairline);
}

@media (min-width: 640px) {
  .interest-row {
    grid-template-columns: 3.5rem 1fr;
    gap: 1.25rem;
    align-items: baseline;
  }
}

.interest-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.interest-body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.interest-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-primary);
}

.interest-desc {
  color: var(--text-secondary);
  font-size: 0.98rem;
  max-width: 60ch;
}

/* ==========================================================================
   7. Selected Work & Projects Archive
   ========================================================================== */

.projects-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Honest, understated note when no public projects are published yet */
.archive-empty-note {
  border-left: 3px solid var(--accent);
  border-top: 1px solid var(--border-hairline);
  border-right: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  background: linear-gradient(145deg, rgba(22, 25, 32, 0.9), rgba(16, 18, 24, 0.9));
  padding: 1.6rem 1.85rem;
  max-width: 62ch;
  border-radius: 0 4px 4px 0;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.4), 0 0 25px rgba(255, 31, 68, 0.1);
}

.archive-status-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent);
  margin-bottom: 0.55rem;
}

.archive-empty-text {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 1rem;
}

.archive-github-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 0.15rem;
}

.archive-github-link:hover {
  color: var(--accent);
}

/* Real Project Entry (Used when adding real projects) */
.project-entry {
  padding-block: 1.85rem;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.project-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
}

.project-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-primary);
}

.project-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.project-description {
  color: var(--text-secondary);
  max-width: 62ch;
}

.project-links {
  display: flex;
  gap: 1.25rem;
  padding-top: 0.25rem;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* ==========================================================================
   8. Contact & Verified Links
   ========================================================================== */

.contact-intro {
  color: var(--text-secondary);
  max-width: 56ch;
  margin-bottom: 2rem;
}

.contact-directory {
  list-style: none;
  border-top: 1px solid var(--border-hairline);
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--border-hairline);
  gap: 1rem;
}

.contact-platform {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  min-width: 120px;
}

.contact-link {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.contact-link:hover {
  color: var(--accent);
  text-shadow: 0 0 15px rgba(255, 31, 68, 0.45);
}

.contact-arrow {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--accent);
  text-shadow: 0 0 10px rgba(255, 31, 68, 0.5);
  transition: transform 0.18s ease, text-shadow 0.18s ease;
}

.contact-link:hover .contact-arrow {
  transform: translate(3px, -3px);
  text-shadow: 0 0 16px rgba(255, 31, 68, 0.85);
}

/* ==========================================================================
   9. Colophon / Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border-hairline);
  padding-block: 2.5rem;
  background-color: var(--bg-elevated);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}


/* ==========================================================================
   10. Sleek Neon Red & Graphite Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
  width: 9px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #232733;
  border-radius: 4px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}