/* ========================================
   Omar Mahmoud — Portfolio
   Design System & Global Styles
   ======================================== */

/* ---------- Custom Properties ---------- */
:root {
  --bg-deep:    #080D18;
  --bg-main:    #0D1526;
  --bg-card:    #131E33;
  --bg-raised:  #1A2844;
  --blue-mid:   #1E3A5F;
  --blue-glow:  #2D6BE4;
  --grey-1:     #E2E8F4;
  --grey-2:     #8A9BBE;
  --grey-3:     #4A5878;
  --grey-4:     #5e6b79;

  --font-display: 'DM Sans', sans-serif;
  --font-body:    'Inter', sans-serif;

  --max-w: 1120px;
  --project-max-w: 860px;
  --nav-h: 64px;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--grey-1);
  background: var(--bg-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

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

.section-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue-glow);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin-bottom: 48px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Mouse Glow ---------- */
.mouse-glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  background:
    radial-gradient(400px circle at 50% 50%, rgba(29, 78, 216, 0.18), transparent 70%),
    radial-gradient(80px circle at 50% 50%, rgba(99, 179, 255, 0.12), transparent 60%);
}
.mouse-glow.active {
  opacity: 1;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.35s ease;
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  background: rgba(8, 13, 24, 0.95);
  border-bottom-color: var(--blue-mid);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar__logo {
  display: flex;
  align-items: center;
}
.navbar__logo img {
  height: 40px;
  width: auto;
  display: block;
}
.navbar__links {
  display: flex;
  gap: 32px;
}
.navbar__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--grey-2);
  transition: color 0.2s;
  position: relative;
}
.navbar__links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--blue-glow);
  transition: width 0.25s ease;
}
.navbar__links a:hover,
.navbar__links a.active {
  color: var(--grey-1);
}
.navbar__links a.active::after,
.navbar__links a:hover::after {
  width: 100%;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--grey-1);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  background: var(--bg-deep);
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 64px;
  align-items: center;
  width: 100%;
}
.hero__text { max-width: 620px; }

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue-glow);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  margin-bottom: 12px;
  color: var(--grey-1);
}

.hero__subtitle {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--grey-4);
  margin-bottom: 20px;
}

.hero__bio {
  color: var(--grey-2);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--blue-glow);
  color: #fff;
  border-color: var(--blue-glow);
}
.btn--primary:hover {
  background: #2459c0;
  box-shadow: 0 4px 20px rgba(45, 107, 228, 0.35);
}
.btn--outline {
  background: transparent;
  color: var(--grey-1);
  border-color: var(--blue-mid);
}
.btn--outline:hover {
  border-color: var(--blue-glow);
  color: var(--blue-glow);
}

/* Hero Photo */
.hero__photo {
  position: relative;
  width: 400px; height: 400px;
  flex-shrink: 0;
}
.hero__photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 50%;
  position: relative;
  z-index: 2;
}
.hero__photo-ring {
  position: absolute;
  inset: -16px;
  border-radius: 50%;
  border: 2px dashed white;
  opacity: 0.25;
  animation: spin 12s linear infinite;
}
.hero__photo-ring2 {
  position: absolute;
  inset: -32px;
  border-radius: 50%;
  border: 1px dashed white;
  opacity: 0.1;
  animation: spin 18s linear infinite reverse;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Skills ---------- */
.skills {
  padding: 96px 0;
  background: var(--bg-main);
  text-align: center;
  position: relative;
  z-index: 1;
}
.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--blue-mid);
  border-top: 2px solid var(--blue-mid);
  border-radius: 8px;
  padding: 28px 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.skill-card:hover {
  border-color: var(--blue-glow);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  transform: translateY(-3px);
}
.skill-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--grey-1);
}
.skill-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-raised);
  color: var(--grey-2);
  border: 1px solid var(--blue-mid);
  border-radius: 20px;
  white-space: nowrap;
}

/* ---------- Projects ---------- */
.projects {
  padding: 96px 0;
  background: var(--bg-deep);
  text-align: center;
  position: relative;
  z-index: 1;
}
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--blue-mid);
  border-top: 2px solid var(--blue-mid);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  border-color: var(--blue-glow);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  transform: translateY(-6px);
}
.project-card__img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--bg-raised);
}
.project-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.project-card__num {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--blue-glow);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.project-card__name {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.project-card__desc {
  font-size: 0.875rem;
  color: var(--grey-2);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}
.project-card__link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--blue-glow);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}
.project-card:hover .project-card__link {
  gap: 10px;
}

/* ---------- Training (Timeline) ---------- */
.training {
  padding: 96px 0;
  background: var(--bg-main);
  position: relative;
  z-index: 1;
}
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 1px;
  background: var(--blue-mid);
  transform: translateX(-50%);
}
.timeline__item {
  position: relative;
  padding: 0 0 48px 0;
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  align-items: start;
}
.timeline__item:last-child { padding-bottom: 0; }

.timeline__date {
  text-align: right;
  padding-right: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--blue-glow);
  white-space: nowrap;
}
.timeline__dot-wrap {
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 2;
}
.timeline__dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--blue-glow);
  border: 2px solid var(--bg-main);
  margin-top: 4px;
}
.timeline__content {
  padding-left: 20px;
}
.timeline__role {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--grey-1);
  margin-bottom: 4px;
}
.timeline__company {
  font-size: 0.85rem;
  color: var(--grey-2);
}

/* ---------- Education ---------- */
.education {
  padding: 96px 0;
  background: var(--bg-deep);
  text-align: center;
  position: relative;
  z-index: 1;
}
.edu-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--blue-mid);
  border-top: 2px solid var(--blue-mid);
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  gap: 24px;
}
.edu-card__logo {
  width: 70px;
  height: 70px;
  flex-shrink: 0;
  object-fit: contain;
}
.edu-card__text {
  text-align: left;
}
.edu-card__degree {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.edu-card__uni {
  font-size: 0.9rem;
  color: var(--grey-2);
  margin-bottom: 4px;
}
.edu-card__year {
  font-size: 0.8rem;
  color: var(--blue-glow);
  font-weight: 500;
}

/* ---------- Contact ---------- */
.contact {
  padding: 96px 0;
  background: var(--bg-main);
  text-align: center;
  position: relative;
  z-index: 1;
}
.contact__links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: 1px solid var(--blue-mid);
  border-radius: 8px;
  background: transparent;
  color: var(--grey-1);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, color 0.25s;
  text-decoration: none;
}
.contact-btn:hover {
  background: var(--blue-glow);
  border-color: var(--blue-glow);
  color: #fff;
}
.contact-btn svg {
  width: 18px; height: 18px;
  fill: currentColor;
}

/* ---------- Footer ---------- */
.footer {
  padding: 32px 0;
  background: var(--bg-deep);
  border-top: 1px solid var(--blue-mid);
  text-align: center;
  position: relative;
  z-index: 1;
}
.footer p {
  font-size: 0.8rem;
  color: var(--grey-3);
}

/* ========================================
   PROJECT PAGES
   ======================================== */

/* Project Topbar */
.project-topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(8, 13, 24, 0.95);
  border-bottom: 1px solid var(--blue-mid);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.project-topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--grey-2);
  transition: color 0.2s;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
}
.back-btn:hover { color: var(--grey-1); }
.back-btn__arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}
.back-btn:hover .back-btn__arrow {
  transform: translateX(-4px);
}
.topbar__name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--grey-2);
}

/* Project Hero */
.project-hero {
  padding: 80px 0 64px;
  background: var(--bg-deep);
  position: relative;
  z-index: 1;
}
.project-hero .container { text-align: center; }
.project-hero__num {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--blue-glow);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.project-hero__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-bottom: 12px;
}
.project-hero__badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-glow);
  border: 1px solid var(--blue-glow);
  border-radius: 20px;
  background: rgba(45, 107, 228, 0.1);
}

/* Project Body */
.project-body {
  padding: 64px 0 96px;
  background: var(--bg-main);
  max-width: var(--project-max-w);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.project-body__section {
  margin-bottom: 48px;
}
.project-body__section:last-child { margin-bottom: 0; }

.project-body__heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--grey-1);
}
.project-body__text {
  font-size: 0.95rem;
  color: var(--grey-2);
  line-height: 1.8;
  margin-bottom: 16px;
}
.project-body__text:last-child { margin-bottom: 0; }

.project-body__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.gallery-item {
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--blue-mid);
  aspect-ratio: 1 / 1;
  cursor: pointer;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.gallery-item:hover {
  border-color: var(--blue-glow);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.gallery-item:hover img {
  transform: scale(1.04);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(8, 13, 24, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox__img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 8px 48px rgba(0, 0, 0, 0.5);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}
.lightbox.open .lightbox__img {
  transform: scale(1);
}
.lightbox__close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  color: var(--grey-3);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  line-height: 1;
}
.lightbox__close:hover {
  color: var(--grey-1);
  background: rgba(255, 255, 255, 0.06);
}

/* Demo */
.demo-section {
  text-align: center;
}
.demo-section video {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--blue-mid);
  margin-bottom: 16px;
}
.demo-section iframe {
  width: 100%;
  aspect-ratio: 16/9;
  border: none;
  border-radius: 8px;
  margin-bottom: 16px;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .navbar__links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(8, 13, 24, 0.98);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid var(--blue-mid);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }
  .navbar__links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .navbar__links a {
    padding: 12px 0;
    width: 100%;
    text-align: center;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero__text { max-width: 100%; }
  .hero__bio { max-width: 100%; }
  .hero__actions { justify-content: center; }
  .hero__photo { margin: 0 auto; width: 320px; height: 320px; }

  .skills__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .gallery-item { aspect-ratio: 16 / 10; }
  .edu-card { flex-direction: column; text-align: center; }
  .edu-card__text { text-align: center; }

  .timeline::before { left: 16px; }
  .timeline__item {
    grid-template-columns: 40px 1fr;
    gap: 0;
  }
  .timeline__date {
    grid-column: 2;
    text-align: left;
    padding-left: 12px;
    padding-right: 0;
    margin-bottom: 4px;
  }
  .timeline__dot-wrap {
    grid-column: 1;
    grid-row: 1 / 3;
    justify-content: flex-start;
    padding-left: 10px;
  }
  .timeline__content {
    grid-column: 2;
    padding-left: 12px;
    padding-right: 0;
  }

  .contact__links { flex-direction: column; align-items: center; }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}