/*!
* Digital Bridge Institute - National Diploma Portal Stylesheet
* Standardized Institutional Design System & Calibrated Typography Scale
*/

:root {
  /* Institutional Color Tokens */
  --dbi-primary: #0b3a75;
  --dbi-primary-hover: #072348;
  --dbi-primary-light: #e8f0fe;
  --dbi-primary-rgb: 11, 58, 117;
  
  --dbi-accent: #b45309;
  --dbi-accent-hover: #92400e;
  --dbi-accent-light: #fef3c7;
  --dbi-accent-rgb: 180, 83, 9;

  --dbi-dark-navy: #09192f;
  --dbi-slate-canvas: #f8fafc;
  --dbi-border-subtle: #e2e8f0;
  --dbi-border-input: #cbd5e1;
  
  --dbi-text-main: #0f172a;
  --dbi-text-body: #334155;
  --dbi-text-muted: #64748b;
  --dbi-text-light: #94a3b8;

  /* Calibrated Geometry */
  --dbi-radius-btn: 6px;
  --dbi-radius-card: 10px;
  --dbi-radius-pill: 50rem;

  /* Typography Stack */
  --bs-font-sans-serif: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --bs-font-monospace: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* Legacy mapping for Bootstrap compatibility */
  --bs-primary: var(--dbi-primary);
  --bs-primary-rgb: var(--dbi-primary-rgb);
}

body {
  font-family: var(--bs-font-sans-serif);
  font-size: 0.9375rem; /* 15px base */
  line-height: 1.6;
  color: var(--dbi-text-body);
  background-color: var(--dbi-slate-canvas);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scroll smooth */
html {
  scroll-behavior: smooth;
}

/* Sections */
.page-section {
  padding: 4.5rem 0;
}

/* Section Headings - Calibrated, non-fatiguing scale */
.section-heading {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--dbi-text-main);
  line-height: 1.3;
}

/* Divider Line */
hr.divider {
  height: 3px;
  max-width: 3rem;
  margin: 1.25rem auto;
  background-color: var(--dbi-accent);
  opacity: 1;
  border-radius: var(--dbi-radius-pill);
}

hr.divider-light {
  background-color: #fff;
}

/* Navigation - Clean, Proportional Navbar */
#mainNav {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  background-color: #fff;
  transition: padding-top 0.25s ease, padding-bottom 0.25s ease, background-color 0.25s ease;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

#mainNav .navbar-brand {
  font-weight: 700;
  color: var(--dbi-primary);
  font-size: 1.05rem;
  letter-spacing: 0.2px;
}

#mainNav .navbar-nav .nav-item .nav-link {
  color: var(--dbi-text-body);
  font-weight: 600;
  font-size: 0.84rem;
  padding: 0.5rem 0.85rem;
  letter-spacing: 0.3px;
}

#mainNav .navbar-nav .nav-item .nav-link:hover,
#mainNav .navbar-nav .nav-item .nav-link.active {
  color: var(--dbi-primary);
}

@media (min-width: 992px) {
  #mainNav {
    box-shadow: none;
    background-color: transparent;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }
  #mainNav .navbar-brand {
    color: #ffffff;
  }
  #mainNav .navbar-nav .nav-item .nav-link {
    color: rgba(255, 255, 255, 0.9);
  }
  #mainNav .navbar-nav .nav-item .nav-link:hover,
  #mainNav .navbar-nav .nav-item .nav-link.active {
    color: #ffffff;
  }
  #mainNav.navbar-shrink {
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    background-color: #ffffff;
    padding-top: 0.65rem;
    padding-bottom: 0.65rem;
  }
  #mainNav.navbar-shrink .navbar-brand {
    color: var(--dbi-primary);
  }
  #mainNav.navbar-shrink .navbar-nav .nav-item .nav-link {
    color: var(--dbi-text-body);
  }
  #mainNav.navbar-shrink .navbar-nav .nav-item .nav-link:hover,
  #mainNav.navbar-shrink .navbar-nav .nav-item .nav-link.active {
    color: var(--dbi-primary);
  }
}

/* Masthead / Hero Slider */
header.masthead {
  padding-top: 5.5rem;
  padding-bottom: 2.5rem;
  background-color: var(--dbi-dark-navy);
  position: relative;
}

.hero-slider-container {
  position: relative;
}

.hero-slide-item {
  min-height: 65vh;
  background-size: cover;
  background-position: center;
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
}

.hero-slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(9, 25, 47, 0.92) 0%, rgba(11, 58, 117, 0.85) 100%);
  display: flex;
  align-items: center;
}

.hero-title {
  font-size: 2.15rem; /* Calibrated from 3rem */
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 1.65rem;
  }
  .hero-slide-item {
    min-height: 55vh;
  }
}

/* Features / Laboratory Highlights */
.service-box {
  max-width: 360px;
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  background: var(--dbi-primary-light);
  color: var(--dbi-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
  transition: all 0.2s ease;
}

.service-box:hover .service-icon {
  background: var(--dbi-primary);
  color: #ffffff;
}

.service-box h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--dbi-text-main);
  margin-bottom: 0.5rem;
}

.service-box p {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--dbi-text-muted);
}

/* Programme Cards */
.programme-card {
  border: 1px solid var(--dbi-border-subtle);
  border-radius: var(--dbi-radius-card);
  background: #ffffff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
  height: 100%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.programme-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px -2px rgba(11, 58, 117, 0.1);
  border-color: var(--dbi-primary);
}

.programme-card-header {
  background: var(--dbi-primary);
  color: #ffffff;
  padding: 1.15rem 1.25rem;
}

.programme-card-header h5 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0;
  line-height: 1.35;
}

.programme-card-body {
  padding: 1.25rem;
  font-size: 0.875rem;
}

/* Form Styling - Crisp & Ergonomic */
.form-card {
  border-radius: var(--dbi-radius-card);
  border: 1px solid var(--dbi-border-subtle);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.form-header {
  background: var(--dbi-primary);
  color: #ffffff;
  padding: 1.75rem 1.5rem;
}

.form-header h2 {
  font-size: 1.45rem;
  font-weight: 700;
}

/* Standard Form Controls across the Application */
.form-label {
  font-size: 0.8125rem; /* 13px */
  font-weight: 600;
  color: var(--dbi-text-body);
  margin-bottom: 0.35rem;
}

.form-control, .form-select {
  padding: 0.55rem 0.85rem;
  border-radius: var(--dbi-radius-btn);
  border: 1px solid var(--dbi-border-input);
  background-color: #ffffff;
  font-size: 0.875rem; /* 14px */
  color: var(--dbi-text-main);
  line-height: 1.5;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus, .form-select:focus {
  background-color: #ffffff;
  border-color: var(--dbi-primary);
  box-shadow: 0 0 0 3px rgba(11, 58, 117, 0.12);
  outline: none;
}

.form-text {
  font-size: 0.75rem;
  color: var(--dbi-text-muted);
  margin-top: 0.25rem;
}

/* Standardized Buttons */
.btn-primary-custom {
  background-color: var(--dbi-primary);
  border: 1px solid var(--dbi-primary);
  color: #ffffff;
  padding: 0.55rem 1.35rem;
  font-size: 0.875rem; /* 14px */
  font-weight: 600;
  border-radius: var(--dbi-radius-btn);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: background-color 0.2s ease, transform 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary-custom:hover {
  background-color: var(--dbi-primary-hover);
  border-color: var(--dbi-primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-outline-custom {
  background-color: transparent;
  border: 1.5px solid var(--dbi-primary);
  color: var(--dbi-primary);
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--dbi-radius-btn);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-outline-custom:hover {
  background-color: var(--dbi-primary);
  color: #ffffff;
}

/* Footer */
footer {
  background-color: var(--dbi-dark-navy);
  color: #94a3b8;
  font-size: 0.84rem;
}

footer .text-white-75 {
  color: rgba(255, 255, 255, 0.8) !important;
}

footer .text-white-50 {
  color: rgba(255, 255, 255, 0.6) !important;
}

footer .footer-link,
footer a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.15s ease;
  font-size: 0.84rem;
}

footer .footer-link:hover,
footer a:hover {
  color: #ffffff;
}