/* ══════════════════════════════════════
   CSS VARIABLES
   ══════════════════════════════════════ */
:root {
  /* backgrounds */
  --bg-body:      #ffffff;
  --bg-alt:       #e8e8e8;
  --bg-section:   #ffffff;

  /* text */
  --text-primary:   #111111;
  --text-secondary: #444444;
  --text-muted:     #666666;

  /* nav */
  --nav-bg:         #e8e8e8;
  --nav-link:       rgba(0, 0, 0, 0.75);
  --nav-link-hover: #71c28a;

  /* accents */
  --green:   #71c28a;
  --blue:    #1B7CB7;
  --hr-color: #71c28a;

  /* links */
  --link-color: #111111;

  /* logo */
  --logo-filter: none;

  /* toggle btn */
  --toggle-color: #111111;
}

body.dark {
  --bg-body:      #0d0d0d;
  --bg-alt:       #161616;
  --bg-section:   #0d0d0d;

  --text-primary:   #f0f0f0;
  --text-secondary: #cccccc;
  --text-muted:     #999999;

  --nav-bg:         #161616;
  --nav-link:       rgba(240, 240, 240, 0.85);
  --nav-link-hover: #71c28a;

  --hr-color: #71c28a;
  --link-color: #e0e0e0;
  --logo-filter: invert(1);
  --toggle-color: #f0f0f0;
}

/* ══════════════════════════════════════
   RESET & BASE
   ══════════════════════════════════════ */
* { margin: 0; padding: 0; }

body {
  font-family: 'Inter', Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

/* ══════════════════════════════════════
   NAVIGATION
   ══════════════════════════════════════ */
nav {
  width: 100%;
  background-color: var(--nav-bg) !important;
  transition: background-color 0.3s ease;
}

.navbar-light .navbar-nav .nav-link {
  color: var(--nav-link);
  transition: color 0.2s;
}

.navbar-light .navbar-nav .nav-link:hover {
  color: var(--nav-link-hover);
}

.navbar-light .navbar-toggler {
  border-color: rgba(128, 128, 128, 0.4);
}

body.dark .navbar-light .navbar-toggler-icon {
  filter: invert(1);
}

/* ── Dark mode toggle button ── */
#theme-toggle {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  margin-right: 0.5rem;
}

.toggle-track {
  position: relative;
  display: flex;
  align-items: center;
  width: 64px;
  height: 32px;
  border-radius: 999px;
  background-color: #c8c8c8;
  border: 2px solid #aaaaaa;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  padding: 0 4px;
}

body.dark .toggle-track {
  background-color: #1e3a2a;
  border-color: #71c28a;
}

.toggle-thumb {
  position: absolute;
  left: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: #ffffff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease;
  z-index: 2;
}

body.dark .toggle-thumb {
  transform: translateX(32px);
  background-color: #71c28a;
}

.toggle-icon {
  position: absolute;
  font-size: 0.75rem;
  line-height: 1;
  z-index: 1;
  transition: opacity 0.2s ease;
  user-select: none;
}

.toggle-sun  { left: 6px;  }
.toggle-moon { right: 6px; }

/* in light mode: show sun (left), hide moon */
.toggle-sun  { opacity: 0; }
.toggle-moon { opacity: 1; }

/* in dark mode: show moon (right), hide sun */
body.dark .toggle-sun  { opacity: 1; }
body.dark .toggle-moon { opacity: 0; }

/* ── Navbar brand / logo ── */
.navbar-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  position: relative;
}

.navbar-brand::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 54%;
  transform: translate(-50%, -50%) scale(0);
  width: 75px;
  height: 75px;
  background-color: var(--green);
  border-radius: 50%;
  z-index: 1;
  transition: transform 0.5s ease-in-out;
}

.navbar-brand:hover::before {
  transform: translate(-50%, -50%) scale(1);
}

.img-APlogo {
  height: 70px;
  width: 70px;
  margin: 0 auto;
  z-index: 2;
  transform: scale(2.1);
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1), filter 0.3s ease;
  border-radius: 50%;
  overflow: hidden;
  position: relative;
  filter: var(--logo-filter);
}

@media screen and (min-width: 1000px) {
  .img-APlogo:hover {
    transform: scale(2.9);
  }
}

/* ══════════════════════════════════════
   HOME SECTION
   ══════════════════════════════════════ */
.col-lg-4 {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.profile-img {
  box-shadow: 0px 6px 30px rgba(0, 0, 0, 0.45), 0px 2px 10px rgba(0, 0, 0, 0.3);
  margin-bottom: 35px;
  border: 4px solid var(--green);
  border-radius: 50%;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1), box-shadow 0.45s ease, border-color 0.3s ease;
}

.profile-img:hover {
  border-color: #ffffff;
  box-shadow: 0 0 0 6px var(--green), 0 16px 40px rgba(113, 194, 139, 0.5);
  transform: scale(1.08);
}

/* ══════════════════════════════════════
   CARDS HEADING
   ══════════════════════════════════════ */
.cards-message {
  color: var(--text-primary);
  text-align: center;
  font-size: 2em;
  margin-top: 20px;
  margin-bottom: -90px;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
  padding: 10px;
}

/* ══════════════════════════════════════
   SECTIONS
   ══════════════════════════════════════ */
section {
  padding: 10px;
  margin-top: 60px;
  color: var(--text-primary);
  background-color: var(--bg-section);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Home and cards sections need transparent bg so squares show through */
#home,
#education {
  background-color: transparent !important;
}

/* ══════════════════════════════════════
   LISTS (contact + nav)
   ══════════════════════════════════════ */
ul {
  margin-left: 60px;
}

ul li {
  list-style: none;
  display: inline-block;
  line-height: 60px;
  background-color: transparent;
  padding: 0 30px;
}

ul li a {
  display: block;
  text-decoration: none;
  font-size: 18px;
  color: var(--link-color);
  position: relative;
}

ul li a:hover {
  color: var(--green);
}

ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 4px;
  background-color: var(--green);
  transition: width 0.3s;
}

ul li a:hover::after {
  width: 100%;
}

ul li a.active::after {
  width: 100%;
  background-color: var(--green);
}

ul li a.active {
  border: 1px solid var(--green);
}

/* ══════════════════════════════════════
   EXPERIENCE SECTION
   ══════════════════════════════════════ */
.experience-title {
  text-align: center;
  margin-bottom: 10px;
  font-size: 30px;
  color: var(--text-primary);
}

.resume-btn {
  display: block;
  margin: 10px auto;
}

.job-section {
  text-align: left;
  margin: 20px auto;
  width: 80%;
  color: var(--text-secondary);
}

.job-section h4 {
  color: var(--text-primary);
}

.job-section p, .job-section i {
  color: var(--text-secondary);
}

.experience-point {
  margin-left: -25px;
  color: var(--text-secondary);
}

hr {
  border: none;
  height: 3px;
  background-color: var(--hr-color);
  width: 80%;
  margin: 20px auto;
}

/* ══════════════════════════════════════
   CONTACT SECTION
   ══════════════════════════════════════ */
.contact-section {
  background-color: var(--bg-alt) !important;
  transition: background-color 0.3s ease;
}

/* ══════════════════════════════════════
   MISC
   ══════════════════════════════════════ */
.img-logo {
  width: 50px;
  height: auto;
  margin-right: 10px;
}

/* ══════════════════════════════════════
   MOBILE
   ══════════════════════════════════════ */
@media screen and (max-width: 600px) {
  ul li a { font-size: 10px; }
  .img-APlogo { height: 40px; width: 40px; }
  .navbar-brand { display: none; }
  ul li { line-height: 40px; background-color: transparent; }
  ul { margin-left: 5px; }
}