/* ==========================================================
   TechLab365 - Website Template
   Master Layout for Internal Pages
   ========================================================== */

* {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
}

html,
body {
  min-height: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: Calibri, "Segoe UI", Arial, sans-serif;
  color: #eaf3fb;
  line-height: 1.8;
  background:
    linear-gradient(rgba(8, 21, 35, 0.6), rgba(8, 21, 35, 0.6)),
    url("../img/backgrounds/about-background.png");
  background-repeat: repeat;
  background-position: top left;
  background-size: 700px auto;
  background-color: #081523;
}

/* ==========================================================
   HEADER
   ========================================================== */

.site-header {
  position: relative;
  width: min(100%, 1100px);
  margin: -0.4rem auto 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.05rem;
}

.logo-link {
  display: inline-block;
  text-decoration: none;
}

.site-logo {
  position: static;
  display: block;
  width: clamp(235px, 29vw, 340px);
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  cursor: pointer;
}

/* ==========================================================
   NAVIGATION
   ========================================================== */

.site-nav {
  width: 100%;
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #ffffff;
}

.nav-toggle::-webkit-details-marker {
  display: none;
}

.nav-links {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(0.8rem, 1.2vw, 1.35rem);
  list-style: none;
  padding: 0.15rem 0;
  margin: 0;
}

.nav-links a {
  color: #f5f9fc;
  text-decoration: none;
  font-size: clamp(0.95rem, 1vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.3rem 0.15rem;
  border-bottom: 2px solid transparent;
  transition:
    color 0.2s ease,
    border-color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #66b9ff;
  border-color: #66b9ff;
}

/* ==========================================================
   MOBILE PORTFOLIO LINK
   Hidden on desktop.
   ========================================================== */

.portfolio-mobile-current {
  display: none;
}

/* ==========================================================
   HERO
   ========================================================== */

.page-hero {
  position: relative;
  margin-top: 0.9rem;
  padding: 0.8rem 1.25rem 1.2rem;
  text-align: center;
  background: linear-gradient(rgba(5, 15, 30, 0.88), rgba(5, 15, 30, 0.88));
  border-bottom: 2px solid #00a8ff;
}

.page-hero h1 {
  font-size: clamp(2.2rem, 3.4vw, 2.9rem);
  color: #f2f2f2;
  margin: 1.4rem 0 0.35rem;
  line-height: 1.15;
}

.hero-tagline {
  max-width: 1100px;
  margin: 0 auto;
  white-space: nowrap;
  text-align: center;
  color: #1ea7ff;
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-container {
  width: min(1100px, 92%);
  margin: 1.1rem auto 1.5rem;
}

/* ==========================================================
   CARDS
   ========================================================== */

.card {
  background: #102235;
  border: 1px solid rgba(0, 168, 255, 0.25);
  border-radius: 16px;
  padding: 1.1rem 1.35rem 1.2rem;
  margin-bottom: 1rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.card h2 {
  color: #00a8ff;
  font-size: 1.7rem;
  margin: 0 0 0.6rem;
  border-bottom: 2px solid rgba(0, 168, 255, 0.25);
  padding-bottom: 0.45rem;
}

.card h3 {
  color: #1ea7ff;
  font-size: 1.35rem;
  margin: 1.4rem 0 0.7rem;
  font-weight: 700;
}

.card p {
  text-align: justify;
  margin-bottom: 0.7rem;
  line-height: 1.6;
}

.card ul {
  margin: 0.8rem 0;
  padding-left: 1.4rem;
}

.card li {
  margin-bottom: 0.45rem;
}

/* ==========================================================
   ACTION BUTTONS
   ========================================================== */

.action-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.action-buttons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.4rem;
  border: 2px solid #00a8ff;
  border-radius: 10px;
  text-decoration: none;
  color: #ffffff;
  font-weight: 700;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

.action-buttons a:hover,
.action-buttons a:focus-visible {
  background: #00a8ff;
}

/* ==========================================================
   PAGE NAVIGATION
   ========================================================== */

.page-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(0.75rem, 1.6vw, 1.25rem);
  margin: 1.15rem 0 0;
}

.page-buttons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 110px;
  padding: 0.85rem 1rem;
  border: 2px solid #00a8ff;
  border-radius: 999px;
  text-decoration: none;
  color: #ffffff;
  font-weight: 700;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

.page-buttons a:hover,
.page-buttons a:focus-visible,
.page-buttons a.active {
  background: #00a8ff;
}

/* ==========================================================
   MOBILE
   ========================================================== */

@media (max-width: 768px) {

  .nav-toggle {
    display: none;
  }

  .nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    width: min(92vw, 420px);
    margin: 0 auto;
    padding: 0.25rem 0 0;
    list-style: none;
  }

  .nav-links li {
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .nav-links a {
    display: inline-block;
    padding: 0.35rem 0.5rem;
    border-bottom: 2px solid transparent;
    color: #f5f9fc;
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 700;
  }

  .nav-links a:hover {
    color: #f5f9fc;
    border-color: transparent;
  }

  .nav-links a.active {
    color: #66b9ff;
    border-color: #66b9ff;
  }

  /* Hide the fifth desktop menu item on mobile. */
  .nav-links li:nth-child(5) {
    display: none;
  }

  /* Current portfolio: centred third row. */
  .portfolio-mobile-current {
    display: block;
    width: 100%;
    text-align: center;
    margin: 0.35rem auto 0;
  }

  .portfolio-mobile-current a {
    display: inline-block;
    color: #f5f9fc;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    padding: 0.25rem 0.5rem;
    border-bottom: 2px solid transparent;
  }

  .portfolio-mobile-current a:hover {
    color: #f5f9fc;
    border-color: transparent;
  }

  .portfolio-mobile-current a.active {
    color: #66b9ff;
    border-color: #66b9ff;
  }

  .page-hero {
    padding: 0.75rem 1rem 1rem;
  }

  .page-hero h1 {
    font-size: 2.15rem;
  }

  .hero-tagline {
    white-space: normal;
    font-size: 1rem;
    padding: 0 0.5rem;
  }

  .page-container {
    width: 94%;
    margin: 1rem auto;
  }

  .card {
    padding: 1rem 1rem 1.1rem;
  }

  .card h2 {
    font-size: 1.65rem;
  }

  .card h3 {
    font-size: 1.25rem;
  }

  .action-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .action-buttons a {
    width: 100%;
  }

  .page-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .page-buttons a {
    width: 100%;
  }
}