/* ========================================
   PhoeTech – Global Stylesheet
   Colors: Deep Navy + Electric Blue + White
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;600;700&family=Nunito:wght@300;400;600;700&display=swap');

/* ── CSS Variables ── */
:root {
  --navy:      #0a1628;
  --blue:      #1352a2;
  --blue-mid:  #1a6fd4;
  --blue-light:#3b9eff;
  --accent:    #00c2ff;
  --white:     #ffffff;
  --off-white: #f0f6ff;
  --grey:      #b0c4de;
  --grey-dark: #4a6080;
  --shadow:    0 8px 32px rgba(10, 22, 40, 0.18);
  --radius:    12px;
  --transition: 0.3s ease;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Nunito', sans-serif;
  background: var(--white);
  color: var(--navy);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a   { text-decoration: none; color: inherit; }
ul  { list-style: none; }
h1, h2, h3, h4 {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

/* ── Utility ── */
.container {
  width: min(90%, 1200px);
  margin-inline: auto;
}
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: var(--navy);
}
.btn-primary:hover {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent);
}
.btn-outline {
  background: transparent;
  border-color: var(--white);
  color: var(--white);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--navy);
}

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navy);
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  width: min(95%, 1300px);
  margin-inline: auto;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.nav-logo img { height: 48px; width: auto; }
.nav-logo span {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.04em;
}
.nav-logo span em { color: var(--accent); font-style: normal; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Sign In button in navbar */
.btn-signin {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--navy);
  background: var(--accent);
  padding: 0.4rem 1.1rem;
  border-radius: 50px;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-signin:hover {
  background: var(--blue-light);
  color: var(--white);
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}
.nav-links a {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--grey);
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); background: rgba(255,255,255,0.08); }
.nav-links a.active { color: var(--accent); }
.nav-signin-mobile { display: none !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Section Spacing ── */
section, .section { padding: 5rem 0; }
.section-label {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 0.5rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--navy);
  margin-bottom: 1rem;
}
.section-title span { color: var(--blue-mid); }
.section-sub {
  font-size: 1.05rem;
  color: var(--grey-dark);
  max-width: 580px;
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}
.hero-bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
  opacity: 0.28;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.92) 40%, rgba(19,82,162,0.55));
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 2rem 1.5rem;
  width: min(90%, 780px);
  margin-inline: auto;
  text-align: center;
  animation: fadeUp 0.9s ease both;
}
.hero-content h1 {
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  color: var(--white);
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.hero-content h1 span { color: var(--accent); }
.hero-content p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.82);
  margin-bottom: 2.5rem;
}
.hero-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── Cards Grid ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(19,82,162,0.08);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(10,22,40,0.14);
}
.card-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}
.card-body { padding: 1.5rem; }
.card-body h3 { font-size: 1.25rem; color: var(--navy); margin-bottom: 0.5rem; }
.card-body p  { color: var(--grey-dark); font-size: 0.95rem; }
.card-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

/* ── Highlight Strip ── */
.highlight-strip {
  background: linear-gradient(90deg, var(--navy) 0%, var(--blue) 100%);
  color: var(--white);
  padding: 4rem 0;
}
.highlight-strip .section-title { color: var(--white); }
.highlight-strip .section-sub   { color: rgba(255,255,255,0.75); }

/* ── Two-Column Layout ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.two-col.reverse { direction: rtl; }
.two-col.reverse > * { direction: ltr; }
.two-col-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* ── Stats Row ── */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}
.stat-item { text-align: center; }
.stat-item strong {
  display: block;
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-family: 'Rajdhani', sans-serif;
  color: var(--accent);
}
.stat-item span { font-size: 0.9rem; color: rgba(255,255,255,0.7); }

/* ── Contact Form ── */
.contact-form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}
.form-group { margin-bottom: 1.5rem; }
.form-group label {
  display: block;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--navy);
  margin-bottom: 0.4rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 2px solid rgba(19,82,162,0.15);
  border-radius: 8px;
  font-family: 'Nunito', sans-serif;
  font-size: 0.95rem;
  color: var(--navy);
  background: var(--off-white);
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--blue-light);
  background: var(--white);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-submit {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: var(--white);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
}
.form-submit:hover {
  background: linear-gradient(135deg, var(--blue-mid), var(--accent));
  transform: translateY(-2px);
}

/* ── Info Cards (Contact Page) ── */
.info-card {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  background: var(--off-white);
  border-radius: var(--radius);
  padding: 1.4rem;
  margin-bottom: 1.2rem;
  border-left: 4px solid var(--blue-light);
}
.info-icon { font-size: 1.6rem; flex-shrink: 0; margin-top: 2px; }
.info-card h4 {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-mid);
  margin-bottom: 0.25rem;
}
.info-card p, .info-card a { color: var(--grey-dark); font-size: 0.95rem; }
.info-card a:hover { color: var(--blue-mid); }

/* ── Page Banner ── */
.page-banner {
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
  padding: 5rem 1.5rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://images.unsplash.com/photo-1518770660439-4636190af475?w=1600&q=80') center/cover no-repeat;
  opacity: 0.07;
}
.page-banner h1 {
  position: relative;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--white);
  margin-bottom: 0.75rem;
}
.page-banner p {
  position: relative;
  font-size: 1.05rem;
  color: rgba(255,255,255,0.78);
  max-width: 560px;
  margin-inline: auto;
}

/* ── Engineering Disciplines ── */
.disciplines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.75rem;
}
.discipline-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--blue-light);
  transition: transform var(--transition), border-color var(--transition);
}
.discipline-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
}
.discipline-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}
.discipline-card h3 {
  font-size: 1.1rem;
  color: var(--navy);
  margin-bottom: 0.6rem;
}
.discipline-card p { color: var(--grey-dark); font-size: 0.9rem; }

/* ── Reviews Empty State ── */
.reviews-empty {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 500px;
  margin-inline: auto;
}
.reviews-empty-icon { font-size: 3rem; margin-bottom: 1rem; }
.reviews-empty p { color: var(--grey-dark); font-size: 1rem; }

/* ── Sign In Page ── */
.signin-wrap {
  max-width: 520px;
  margin-inline: auto;
}
.signin-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
  border-radius: 50px;
  overflow: hidden;
  border: 2px solid rgba(19,82,162,0.15);
  background: var(--off-white);
}
.tab-btn {
  flex: 1;
  padding: 0.75rem 1rem;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--grey-dark);
  transition: var(--transition);
}
.tab-btn.active {
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: var(--white);
  border-radius: 50px;
}

/* ── Star Rating ── */
.star-rating {
  display: flex;
  gap: 0.4rem;
  font-size: 2rem;
  cursor: pointer;
  margin-top: 0.25rem;
}
.star-rating span { color: var(--grey); transition: color var(--transition); }
.star-rating span.active,
.star-rating span.hover { color: #f5c518; }

/* ── Footer ── */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.65);
  padding: 3rem 1.5rem 1.5rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  width: min(90%, 1200px);
  margin-inline: auto;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand p { font-size: 0.9rem; margin-top: 0.75rem; line-height: 1.7; }
.footer-brand span {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}
.footer-brand span em { color: var(--accent); font-style: normal; }
footer h4 {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
}
footer ul li { margin-bottom: 0.5rem; }
footer ul a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: color var(--transition); }
footer ul a:hover { color: var(--accent); }
.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  font-size: 0.82rem;
  width: min(90%, 1200px);
  margin-inline: auto;
}
.footer-bottom a { color: var(--accent); }

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible { opacity: 1; transform: none; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; gap: 2rem; }
  .two-col.reverse { direction: ltr; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 700px) {
  section, .section { padding: 3.5rem 0; }

  .hamburger { display: flex; }
  .btn-signin { display: none; }
  .nav-signin-mobile { display: block !important; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--navy);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.1rem;
    box-shadow: 0 12px 24px rgba(0,0,0,0.3);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.7rem 1rem; font-size: 1.05rem; width: 100%; }
  .nav-signin-mobile {
    background: var(--accent) !important;
    color: var(--navy) !important;
    border-radius: 8px;
    text-align: center;
    margin-top: 0.5rem;
  }

  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero { min-height: 75vh; }
  .contact-form { padding: 1.5rem; }
  .disciplines-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
  .disciplines-grid { grid-template-columns: 1fr; }
}