/* styles.css */

/*
--------------------------------------
  1. TYPOGRAPHY & BASE STYLES
--------------------------------------
*/

/* Base text */
body {
  color: #222222;
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

/* Headings */
h1, h2, h3 {
  color: #002147; /* deep navy */
  font-weight: 700;
}

h4, h5, h6 {
  color: #2F4F6F; /* slate blue for softer subheadings */
}

/* Links */
a {
  color: #0047AB; /* royal blue */
  text-decoration: none;
}

a:hover {
  color: #66b2ff; 
  text-decoration: underline;
}

/* Accents */
.highlight, blockquote {
  color: #006D77; /* teal accent */
  border-left: 4px solid #006D77;
  padding-left: 10px;
  font-style: italic;
}

/* Secondary text */
small, .metadata {
  color: #555555;
}


/*
--------------------------------------
  2. MAIN LAYOUT & STRUCTURAL ELEMENTS
--------------------------------------
*/

main {
  background-color: #ffffff; /* white content area */
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05); /* subtle card effect */
}

.page-footer .nav-footer-right {
  display: inline-block;   /* force inline */
  white-space: nowrap;     /* prevent wrapping */
}

.rule-gradient {
  height: 3px;
  background: linear-gradient(to right, transparent, rgba(255, 215, 0, 1), transparent);
  margin: 1.2rem 0;
}


/*
--------------------------------------
  3. NAVIGATION BAR (NAVBAR) STYLES
--------------------------------------
*/

.navbar {
  background-color: #002147; 
}

/* Base style and hover effect for main menu links */
.navbar-nav .nav-link {
  position: relative;
  color: #ffffff !important;
  transition: color 0.3s ease;
}

.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0%;
  height: 2px;
  background-color: #ffcc00; /* gold underline */
  transition: width 0.3s ease;
}

.navbar-nav .nav-link:hover::after {
  width: 100%;
}

/* Secondary Hover effect */
.navbar-nav .nav-link:hover {
  background: linear-gradient(90deg, #0055aa, #0099ff);
  color: #ffffff !important;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
}

.navbar-nav .nav-link.active {
  background-color: #0055aa;
  color: #ffffff !important;
  border-radius: 6px;
}

/* Dropdown Menu effects */
.dropdown-menu {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  transform: translateY(0);
}


/*
--------------------------------------
  4. SIDEBAR STYLES
--------------------------------------
*/

.sidebar {
  width: 265px;
  background: linear-gradient(135deg, #fdfdfd 0%, #e6f0ff 50%, #fdfdfd 100%);
  background-image: repeating-linear-gradient(
    45deg,
    rgba(0, 51, 102, 0.05) 0px,
    rgba(0, 51, 102, 0.05) 2px,
    transparent 2px,
    transparent 6px
  );
  padding: 8px;
  border-radius: 5px;
}


.sidebar .nav-item {
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 8px;
}


/*
--------------------------------------
  5. CUSTOM COMPONENTS (Buttons/Boxes)
--------------------------------------
*/

/* Link Button Group (used in content area) */
.bottom-links {
  display: flex;
  justify-content: center;   /* center them horizontally */
  gap: 1rem;                 /* spacing between buttons */
  margin-top: 1.5rem;
}

.link-btn {
  padding: 0.5rem 1rem;
  border: 1px solid rgba(0,0,0,0.25);
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.95em;
  color: #333;
  background: #f9f9f9;
  transition: all 0.3s ease;
}

.link-btn:hover {
  background: #e6e6e6;
  border-color: rgba(0,0,0,0.4);
}

/* Profile Buttons (used in index bio) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.95rem;       /* rectangle size */
  background-color: #0055aa;    /* light blue fill */
  color: #fffcfc;
  font-size: 0.95em;
  font-weight: 800;
  text-decoration: none;
  gap: 0.4rem;
  border: none;                 /* no border around */
  border-bottom: 3px solid transparent; /* underline placeholder */
  transition: all 0.3s ease;
}

.btn:hover {
  border-bottom: 3px solid #ffcc00; /* gold underline on hover */
  color: #1f1f1f;
}

.btn i {
  font-size: 1em;
  color: inherit;               /* icon matches text color */
}

/*
--------------------------------------
  6. INDEX.QMD SPECIFIC LAYOUT
--------------------------------------
*/

.profile-box {
  border: 1px solid #ddd;          /* subtle border */
  background-color: #fdfdfd;       /* very light background */
  padding: 1rem 1.5rem;            /* space inside the box */
  border-radius: 8px;              /* rounded corners */
  margin-top: 2rem;                /* space above the box */
  text-align: center;              /* center content */
}

.profile-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;                 /* wrap if too many links */
  gap: 1.2rem;
}

.bio {
  max-width: 1100px;          /* keeps text readable */
  margin: 2rem auto;         /* centers the bio block */
  font-size: 1em;
  line-height: 1.6;          /* improves readability */
  color: #333;               /* neutral text color */
  text-align: justify;       /* professional alignment */
}

.title-section {
  display: flex;
  align-items: center;       /* aligns text block and photo vertically */
  justify-content: space-between;
  margin-top: 1rem;
}

.title-text {
  display: flex;
  flex-direction: column;    /* stack PhD line above name */
  justify-content: center;   /* vertically center relative to photo */
}

.degree {
  font-size: 1.2em;
  font-weight: bold;
}

.name {
  font-size: 2em;
  font-weight: bold;
  margin-top: 0.3rem;        /* small spacing between degree and name */
}

.profile-pic {
  width: 230px;
  height: 230px;
  border-radius: 50%;
  object-fit: cover;
  margin-left: 1rem;
  border: 3px solid #ffcc00;
}

/*
--------------------------------------
  7. lists
--------------------------------------
*/

.list-icons {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
}

/*
--------------------------------------
  8. Time line
--------------------------------------
*/

.timeline {
  border-left: 3px solid #6c757d;
  margin-left: 20px;
  padding-left: 20px;
  font-family: inherit;
}

.timeline-item {
  margin-bottom: 30px;
  position: relative;
}

/* The Dot */
.timeline-item::before {
  content: "";
  width: 14px;
  height: 14px;
  background-color: #6c757d;
  border-radius: 50%;
  position: absolute;
  left: -29px;
  top: 5px;
}

.timeline-date {
  font-weight: bold;
  color: #333;
  display: block;
  margin-bottom: 5px;
}

/* This creates the "Tab" effect */
.timeline-info {
  padding-left: 25px; 
}

.timeline-title {
  font-weight: 700;
  font-size: 1.1em;
  color: #000;
  display: block;
}

.timeline-org, .timeline-loc {
  font-style: italic;
  color: #555;
  display: block;
}

.timeline-duties {
  margin-top: 5px;
  color: #666;
  display: block;
  font-size: 0.95em;
}