/* ============================================================
   PORTFOLIO — Mohamed Tarek
   Design: Dark background, off-white text, amber accent.
   Font: DM Sans (body) + DM Mono (code/badges)
   Layout: max-width container, generous spacing, no tricks.
============================================================ */


/* ============================================================
   1. CSS VARIABLES
   All colours and spacing in one place.
   Change --accent here and it updates everywhere.
============================================================ */
:root {
  --bg:          #0e0e0e;       /* main background */
  --bg-card:     #161616;       /* card background */
  --bg-hover:    #1e1e1e;       /* card hover */
  --border:      #2a2a2a;       /* subtle borders */
  --accent:      #0fc9ad;       /* amber — the ONE accent color */
  --accent-dim:  rgba(14, 150, 109, 0.12); /* accent as a tint */
  --text-1:      #f0f0f0;       /* headings */
  --text-2:      #a0a0a0;       /* body / secondary */
  --text-3:      #606060;       /* muted */
  --font-sans:   'DM Sans', system-ui, sans-serif;
  --font-mono:   'DM Mono', 'Courier New', monospace;
  --radius:      8px;
  --max-w:       900px;         /* content never goes wider than this */
  --section-gap: 96px;
}


/* ============================================================
   2. RESET & BASE
   A minimal reset. box-sizing, margins, scroll behavior.
============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text-2);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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


/* ============================================================
   3. LAYOUT HELPERS
   .container   — centred wrapper used by every section
   .section     — vertical padding for all content sections
   .section__header — title + subtitle above section content
============================================================ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-gap) 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section__header {
  margin-bottom: 48px;
}

.section__title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section__sub {
  font-size: 0.95rem;
  color: var(--text-3);
}


/* ============================================================
   4. NAVBAR
   Sticky top bar. Name left, links right.
   Uses a subtle border-bottom on scroll (JS adds .scrolled).
============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  background-color: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.navbar.scrolled {
  border-bottom-color: var(--border);
}

.navbar__name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-1);
  letter-spacing: -0.01em;
}

.navbar__links {
  display: flex;
  gap: 32px;
}

.navbar__links a {
  font-size: 0.875rem;
  color: var(--text-3);
  transition: color 0.15s;
}

.navbar__links a:hover {
  color: var(--text-1);
}


/* ============================================================
   5. BUTTONS
   Two variants: --primary (filled accent) and --outline (border).
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
  border: 1px solid transparent;
}

.btn--primary {
  background-color: var(--accent);
  color: #0e0e0e;
}

.btn--primary:hover {
  opacity: 0.88;
}

.btn--outline {
  background-color: transparent;
  color: var(--text-1);
  border-color: var(--border);
}

.btn--outline:hover {
  border-color: var(--text-3);
  background-color: var(--bg-hover);
}


/* ============================================================
   6. HERO SECTION
   Full-viewport intro. Large name, role tag, bio, two buttons.
============================================================ */
.hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 80px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero__content {
  max-width: 640px;
}

.hero__tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero__name {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero__bio {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero__ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero__meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero__meta span {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-3);
}


/* ============================================================
   7. PROJECT CARDS
   Two-column grid on desktop, single column on mobile.
   Each card: title, description, tech badges, links.
============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 20px;
}

.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s, background-color 0.2s;
}

.project-card:hover {
  border-color: var(--accent);
  background-color: var(--bg-hover);
}

.project-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.project-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.01em;
}

.project-card__badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 4px;
  background-color: var(--accent-dim);
  color: var(--accent);
  white-space: nowrap;
}

.project-card__desc {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.65;
  flex: 1;
}

.project-card__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stack-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
  background-color: var(--bg);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 4px;
}

.project-card__highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-card__highlights li {
  font-size: 0.83rem;
  color: var(--text-3);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}

.project-card__highlights li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}

.project-card__links {
  display: flex;
  gap: 16px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.project-link {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color 0.15s;
}

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

.project-link--primary {
  color: var(--accent);
}

.project-link--primary:hover {
  opacity: 0.8;
}


/* ============================================================
   8. SKILLS SECTION
   Four groups: Backend / Frontend / Databases / DevOps & Tools.
   Simple pill badges inside labelled groups.
============================================================ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 28px;
}

.skill-group__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.skill-group__items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-pill {
  font-size: 0.82rem;
  color: var(--text-2);
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 20px;
  transition: border-color 0.15s, color 0.15s;
}

.skill-pill:hover {
  border-color: var(--text-3);
  color: var(--text-1);
}


/* ============================================================
   9. EXPERIENCE SECTION
   Simple vertical list. Each item: role, org, date, description.
============================================================ */
.experience__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.exp-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.exp-item:first-child {
  border-top: 1px solid var(--border);
}

.exp-item__date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
  padding-top: 3px;
}

.exp-item__role {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 4px;
}

.exp-item__org {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.exp-item__desc {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.65;
}


/* ============================================================
   10. CONTACT SECTION
   Three links stacked vertically. Big and easy to click.
============================================================ */
.contact__links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  font-size: 0.95rem;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  transition: color 0.15s;
}

.contact__link:last-child {
  border-bottom: none;
}

.contact__link:hover {
  color: var(--text-1);
}

.contact__icon {
  font-size: 1rem;
  color: var(--accent);
  width: 20px;
}


/* ============================================================
   11. FOOTER
============================================================ */
.footer {
  padding: 32px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-3);
  max-width: var(--max-w);
  margin: 0 auto;
}


/* ============================================================
   12. RESPONSIVE — MOBILE
   Below 640px: collapse grids, shrink padding.
============================================================ */
@media (max-width: 640px) {
  .navbar {
    padding: 16px 20px;
  }

  .navbar__links {
    gap: 20px;
  }

  .hero {
    padding: 48px 20px;
    min-height: auto;
  }

  .section {
    padding: calc(var(--section-gap) * 0.6) 20px;
  }

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

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

  .exp-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: flex-start;
  }
}