/* ==========================================================================
   Prof. Dr. Hanane REDDAD - Academic Portfolio
   Theme: Modern, Simple & Clean Bootstrap 5 Integration
   Colors: Ocean Blue (#0284c7), Light Grey / Grille (#f1f5f9, #e2e8f0), White (#fff), Black (#0f172a)
   ========================================================================== */

:root {
  --primary-blue: #0284c7;
  --primary-blue-dark: #0369a1;
  --primary-blue-light: #38bdf8;
  --primary-blue-subtle: #f0f9ff;
  --primary-blue-border: rgba(2, 132, 199, 0.2);

  --dark-black: #0f172a;
  --dark-black-subtle: #1e293b;

  --grey-bg: #f8fafc;
  --grey-border: #e2e8f0;
  --grey-text: #475569;
  --grey-muted: #64748b;

  --font-heading: 'Josefin Sans', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  font-family: var(--font-body);
  color: var(--grey-text);
  background-color: #ffffff;
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
  font-family: var(--font-heading);
  color: var(--dark-black);
  font-weight: 700;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: var(--primary-blue-dark);
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.custom-navbar {
  background-color: #ffffff !important;
  border-bottom: 1px solid var(--grey-border);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
  padding-top: 14px;
  padding-bottom: 14px;
}

.navbar-brand img {
  height: 44px;
  width: auto;
}

.custom-navbar .nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--dark-black);
  padding: 8px 14px !important;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.custom-navbar .nav-link:hover {
  color: var(--primary-blue);
  background-color: var(--grey-bg);
}

.custom-navbar .nav-link.active {
  color: var(--primary-blue) !important;
  background-color: var(--primary-blue-subtle);
  font-weight: 700;
}

.custom-navbar .nav-link.highlight {
  color: var(--primary-blue-dark);
  font-weight: 700;
}

.btn-contact-nav {
  background-color: var(--dark-black);
  color: #ffffff !important;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 18px;
  border-radius: 6px;
  border: 1px solid var(--dark-black);
  transition: all 0.2s ease;
}

.btn-contact-nav:hover {
  background-color: var(--primary-blue);
  border-color: var(--primary-blue);
  color: #ffffff !important;
}

/* ==========================================================================
   HERO BANNER (HOME)
   ========================================================================== */
.hero-banner {
  position: relative;
  min-height: 440px;
  background-image: url('../images/hero_bg.png');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
}

.hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.45) 0%, rgba(15, 23, 42, 0.6) 100%);
}

.hero-banner .hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  padding: 40px 20px;
}

.hero-banner h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.25;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}

.hero-banner .text-accent {
  color: var(--primary-blue-light);
}

.hero-divider {
  width: 70px;
  height: 4px;
  background-color: var(--primary-blue-light);
  margin: 20px auto 0 auto;
  border-radius: 2px;
}

/* ==========================================================================
   INNER PAGE HEADER BANNER
   ========================================================================== */
.page-header-banner {
  background-color: var(--grey-bg);
  border-bottom: 1px solid var(--grey-border);
  padding: 48px 0;
  text-align: center;
}

.page-header-banner .badge-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary-blue);
  background-color: var(--primary-blue-subtle);
  border: 1px solid var(--primary-blue-border);
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 12px;
}

.page-header-banner h1 {
  font-size: 2.25rem;
  color: var(--dark-black);
  margin-bottom: 8px;
}

.page-header-banner p {
  color: var(--grey-muted);
  font-size: 1.05rem;
  max-width: 650px;
  margin: 0 auto;
}

/* ==========================================================================
   BIO SECTION & PHOTO FRAME
   ========================================================================== */
.bio-frame {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.1);
  border: 4px solid #ffffff;
}

.bio-frame img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.bio-frame:hover img {
  transform: scale(1.02);
}

.bio-badge {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(6px);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-family: var(--font-heading);
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.callout-box {
  background-color: var(--grey-bg);
  border-left: 4px solid var(--primary-blue);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin-top: 24px;
}

/* ==========================================================================
   CARDS & GRID
   ========================================================================== */
.simple-card {
  background: #ffffff;
  border: 1px solid var(--grey-border);
  border-radius: 12px;
  padding: 28px 24px;
  transition: all 0.25s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.simple-card:hover {
  border-color: var(--primary-blue);
  box-shadow: 0 12px 24px rgba(2, 132, 199, 0.1);
  transform: translateY(-3px);
}

.simple-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background-color: var(--primary-blue-subtle);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.simple-card-title {
  font-size: 1.25rem;
  color: var(--dark-black);
  margin-bottom: 10px;
}

.simple-card-desc {
  font-size: 0.95rem;
  color: var(--grey-text);
  flex-grow: 1;
}

.simple-card-footer {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--grey-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Social cards */
.social-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}

.social-card .icon-box {
  width: 84px;
  height: 84px;
  background-color: var(--grey-bg);
  border: 1px solid var(--grey-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  margin-bottom: 16px;
  transition: transform 0.3s ease;
}

.social-card:hover .icon-box {
  transform: scale(1.08);
}

.social-card .icon-box img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* ==========================================================================
   TIMELINE FOR CV
   ========================================================================== */
.timeline-modern {
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--grey-border);
  margin-top: 20px;
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -35px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--primary-blue);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px var(--primary-blue);
}

.timeline-date {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1.15rem;
  color: var(--dark-black);
  margin-bottom: 4px;
}

.timeline-sub {
  font-size: 0.95rem;
  color: var(--grey-muted);
  margin-bottom: 8px;
}

/* ==========================================================================
   PUBLICATIONS LIST
   ========================================================================== */
.pub-box {
  background: #ffffff;
  border: 1px solid var(--grey-border);
  border-left: 4px solid var(--primary-blue);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 18px;
  transition: all 0.2s ease;
}

.pub-box:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.06);
}

.pub-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-blue-dark);
  background-color: var(--primary-blue-subtle);
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 8px;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn-primary-custom {
  background-color: var(--primary-blue);
  border: 1px solid var(--primary-blue);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 6px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.btn-outline-custom {
  background-color: transparent;
  border: 1px solid var(--grey-border);
  color: var(--dark-black);
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.btn-outline-custom:hover {
  background-color: var(--grey-bg);
  border-color: var(--dark-black);
  color: var(--dark-black);
}

/* ==========================================================================
   FOOTER (BLACK & BLUE)
   ========================================================================== */
.site-footer {
  background-color: var(--dark-black);
  color: #cbd5e1;
  padding-top: 60px;
  padding-bottom: 30px;
  border-top: 1px solid #334155;
  margin-top: 60px;
  clear: both;
  width: 100%;
  position: relative;
  z-index: 10;
}

.footer-signature-img {
  max-width: 380px;
  width: 100%;
  height: auto;
}

.footer-name-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
}

.footer-group {
  color: var(--primary-blue-light);
  font-weight: 600;
  margin-bottom: 12px;
}

.footer-contact-link {
  color: #ffffff;
  transition: color 0.2s ease;
}

.footer-contact-link:hover {
  color: var(--primary-blue-light);
  text-decoration: underline;
}

.footer-bottom-bar {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  margin-top: 40px;
  font-size: 0.85rem;
  color: #94a3b8;
}

.footer-bottom-bar a {
  color: #94a3b8;
}

.footer-bottom-bar a:hover {
  color: #ffffff;
}