@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap');

:root {
  /* Dark Theme (Default) */
  --bg-color: #000;
  --text-color: #fff;
  --text-secondary: #d1d1d1;
  --accent-color: #a8b0ff;
  --h1-gradient: -webkit-linear-gradient(45deg, #fff, #a8b0ff);
  
  --nav-bg: rgba(20, 20, 20, 0.6);
  --nav-border: rgba(255, 255, 255, 0.1);
  --nav-link-hover-bg: rgba(255, 255, 255, 0.1);
  --nav-brand-color: #a8b0ff;
  
  --card-bg: rgba(20, 20, 20, 0.5);
  --card-border: rgba(255, 255, 255, 0.1);
  
  --social-card-bg: rgba(30, 30, 30, 0.6);
  --social-card-hover-bg: rgba(50, 50, 50, 0.8);
  --svg-fill: #fff;
  
  --scroll-btn-bg: rgba(78, 84, 200, 0.8);
  --scroll-btn-hover-bg: rgba(78, 84, 200, 1);
  
  --circle1-color: rgba(12, 119, 255, 0.3);
  --circle2-color: rgba(0, 56, 255, 0.3);
  --circle3-color: rgba(65, 56, 210, 0.5);
  
  --footer-border: rgba(255, 255, 255, 0.1);
}

.light-theme {
  --bg-color: #f4f4f9;
  --text-color: #1a1a1a;
  --text-secondary: #4a4a4a;
  --accent-color: #4e54c8;
  --h1-gradient: -webkit-linear-gradient(45deg, #1a1a1a, #4e54c8);
  
  --nav-bg: rgba(255, 255, 255, 0.7);
  --nav-border: rgba(0, 0, 0, 0.1);
  --nav-link-hover-bg: rgba(0, 0, 0, 0.05);
  --nav-brand-color: #4e54c8;
  
  --card-bg: rgba(255, 255, 255, 0.7);
  --card-border: rgba(0, 0, 0, 0.1);
  
  --social-card-bg: rgba(255, 255, 255, 0.8);
  --social-card-hover-bg: rgba(240, 240, 245, 1);
  --svg-fill: #1a1a1a;
  
  --scroll-btn-bg: rgba(78, 84, 200, 0.9);
  --scroll-btn-hover-bg: rgba(78, 84, 200, 1);
  
  --circle1-color: rgba(12, 119, 255, 0.15);
  --circle2-color: rgba(0, 56, 255, 0.15);
  --circle3-color: rgba(65, 56, 210, 0.2);
  
  --footer-border: rgba(0, 0, 0, 0.1);
}

/* ====== General Styles ====== */
body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', sans-serif;
  color: var(--text-color);
  background-color: var(--bg-color);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ====== FirstLogonAnim Background ====== */
.background-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  background-color: var(--bg-color);
  transition: background-color 0.3s ease;
}

@keyframes circle1Path {
  0% { transform: translate(0vw, 0vh); width: 30vw; height: 30vw; }
  100% { transform: translate(0vw, -35vh); width: 80vw; height: 80vw; }
}

@keyframes circle2Path {
  0% { transform: translate(0vw, 0vh); width: 20vw; height: 20vw; }
  100% { transform: translate(-45vw, -40vh); width: 80vw; height: 80vw; }
}

@keyframes circle3Path {
  0% { transform: translate(0vw, 0vh); width: 20vw; height: 20vw; }
  100% { transform: translate(-55vw, -80vh); width: 120vw; height: 120vw; }
}

@keyframes fadeCircleIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

.circle1 {
  left: 30vw;
  top: 25vh;
  position: absolute;
  animation: circle1Path 12s infinite alternate, fadeCircleIn 1332ms ease-out;
  border-radius: 100vw;
  background: radial-gradient(50% 50% at 50% 50%, var(--circle1-color) 15.62%, transparent 100%);
  transition: background 0.3s ease;
}

.circle2 {
  left: 45vw;
  top: 30vh;
  position: absolute;
  animation: circle2Path 11.5s infinite alternate, fadeCircleIn 1332ms ease-out;
  border-radius: 100vw;
  background: radial-gradient(50% 50% at 50% 50%, var(--circle2-color) 15.62%, transparent 100%);
  transition: background 0.3s ease;
}

.circle3 {
  left: 35vw;
  top: 30vh;
  position: absolute;
  animation: circle3Path 15s infinite alternate, fadeCircleIn 1332ms ease-out;
  border-radius: 100vw;
  background: radial-gradient(50% 50% at 50% 50%, var(--circle3-color) 15.62%, transparent 100%);
  transition: background 0.3s ease;
}

a {
  text-decoration: none;
  color: var(--text-color);
  transition: color 0.3s ease;
}

img {
  max-width: 100%;
  height: auto;
}

/* ====== Navbar ====== */
.navbar {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: auto;
  min-width: 300px;
  z-index: 1000;
  background: none;
  box-sizing: border-box;
}

.navbar-inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--nav-border);
  border-radius: 20px;
  padding: 6px 16px;
  height: auto;
  flex-wrap: nowrap;
  white-space: nowrap;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.navbar-brand a {
  font-size: 1.1em;
  color: var(--nav-brand-color);
  font-weight: 800;
  margin-right: 8px;
  padding: 6px 12px;
  transition: transform 0.2s, color 0.2s;
  display: flex;
  align-items: center;
}

.navbar-brand a:hover {
  transform: scale(1.05);
  color: var(--text-color);
}

.navbar-links {
  display: flex;
  align-items: center;
}

.navbar-links a {
  font-size: 0.95em;
  color: var(--text-secondary);
  font-weight: 600;
  border-radius: 12px;
  transition: background 0.3s, color 0.3s, transform 0.2s;
  padding: 8px 16px;
  display: inline-flex;
  align-items: center;
}

.navbar-links a:hover,
.navbar-links a[aria-current="page"] {
  background-color: var(--nav-link-hover-bg);
  color: var(--text-color);
  transform: translateY(-2px);
}

/* Theme Toggle Button */
#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2em;
  padding: 6px;
  margin-left: 8px;
  border-radius: 50%;
  transition: transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
#theme-toggle:hover {
  transform: scale(1.1);
  background-color: var(--nav-link-hover-bg);
}
#theme-toggle:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* ====== Main Content Centering ====== */
.main-middle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 60px); /* minus footer approx height */
  text-align: center;
  width: 100%;
  padding-top: 100px;
  padding-bottom: 40px;
  box-sizing: border-box;
  animation: fadeIn 1s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.main-middle h1 {
  font-size: 3em;
  font-weight: 800;
  margin-bottom: 12px;
  background: var(--h1-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: background 0.3s ease;
}

.main-middle h2, .main-middle h3 {
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 600px;
  line-height: 1.5;
  padding: 0 16px;
}

.content-box {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 40px;
  max-width: 800px;
  width: 90%;
  margin: 20px auto;
  text-align: left;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.content-box h2 {
  font-size: 2em;
  font-weight: 800;
  margin-top: 0;
  color: var(--text-color);
  margin-bottom: 16px;
}

.content-box p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.1em;
  margin-bottom: 16px;
}

.content-box ul {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.1em;
  margin-bottom: 16px;
}

.content-box strong {
  color: var(--text-color);
}

.btn-primary {
  display: inline-block;
  background: var(--nav-bg);
  border: 1px solid var(--nav-border);
  color: var(--text-color);
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 600;
  transition: background 0.3s, transform 0.2s;
  margin-top: 10px;
  backdrop-filter: blur(5px);
}
.btn-primary:hover {
  background: var(--nav-link-hover-bg);
  transform: translateY(-2px);
}

/* ====== Circular Image ====== */
.circular_image {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  border: 4px solid var(--card-border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  margin-bottom: 24px;
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.circular_image:hover {
  transform: scale(1.05) rotate(2deg);
  border-color: var(--accent-color);
}

.circular_image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  display: block;
}

/* ====== Social Links ====== */
.social-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  justify-content: center;
  align-items: stretch;
  width: 100%;
  max-width: 800px;
  box-sizing: border-box;
  padding: 24px;
}

.social-links a {
  background: var(--social-card-bg);
  backdrop-filter: blur(5px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  padding: 20px 16px;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 150px; 
}

.social-links a:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.4);
  background: var(--social-card-hover-bg);
  border-color: var(--accent-color);
}

.social-links a svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  fill: var(--svg-fill);
  transition: transform 0.3s ease, fill 0.3s ease;
}

.social-links a:hover svg {
  transform: scale(1.1);
}

.social-links a h3 {
  margin: 0;
  font-size: 1.1em;
  font-weight: 600;
  color: var(--text-color);
  text-align: center;
  padding: 0;
}

.social-links a p {
  margin: 6px 0 0 0;
  font-size: 0.85em;
  color: var(--accent-color);
  opacity: 0.8;
}

/* ====== Projects Grid ====== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 20px;
  transition: transform 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-color);
}

.project-card h3 {
  color: var(--text-color);
  margin-top: 0;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 1.2em;
}

.project-card p {
  font-size: 0.9em;
  margin-bottom: 0;
}


/* ====== Footer ====== */
footer {
  width: 100%;
  text-align: center;
  padding: 20px 0;
  border-top: 1px solid var(--footer-border);
  color: var(--text-secondary);
  font-size: 0.9em;
  margin-top: auto;
  backdrop-filter: blur(5px);
}
footer a {
  color: var(--accent-color);
}
footer a:hover {
  text-decoration: underline;
}


/* ====== Scroll To Top Button ====== */
#scrollToTopBtn {
  display: none;
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  background: var(--scroll-btn-bg);
  backdrop-filter: blur(8px);
  color: white;
  border: 1px solid var(--accent-color);
  border-radius: 16px;
  width: 50px;
  height: 50px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4), 0 0 10px rgba(168, 176, 255, 0.2);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  animation: none;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
#scrollToTopBtn:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 4px;
}

#scrollToTopBtn:hover {
  background: var(--scroll-btn-hover-bg);
  transform: translateY(-4px);
}

#scrollToTopBtn.show {
  animation: bounce-in 0.5s;
}

/* ====== Responsive Design ====== */
@media (max-width: 768px) {
  .content-box {
    padding: 30px;
    width: 85%;
  }
  .main-middle {
    padding-top: 100px;
  }
}

@media (max-width: 600px) {
  .navbar {
    top: 12px;
    width: 92%;
    min-width: 0;
  }
  .navbar-inner {
    gap: 8px;
    padding: 8px 12px;
    font-size: 0.9em;
  }
  .navbar-brand {
    display: none;
  }
  .navbar-links a {
    padding: 6px 10px;
  }
  .main-middle h1 {
    font-size: 2em;
    padding: 0 16px;
  }
  .main-middle h2, .main-middle h3 {
    font-size: 1.05em;
    padding: 0 20px;
  }
  .content-box {
    padding: 24px 20px;
    width: 90%;
    margin: 10px auto;
  }
  .content-box h2 {
    font-size: 1.6em;
  }
  .content-box p {
    font-size: 1.05em;
  }
  .circular_image {
    width: 150px;
    height: 150px;
  }
  .social-links {
    grid-template-columns: 1fr;
    gap: 1.2rem;
    padding: 16px 20px;
  }
  .social-links a {
    height: 120px;
    padding: 16px;
  }
  .social-links a svg {
    width: 40px;
    height: 40px;
    margin-bottom: 8px;
  }
  .social-links a h3 {
    font-size: 1.1em;
  }
  #scrollToTopBtn {
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    font-size: 1.2em;
  }
}

/* ====== Animations ====== */
@keyframes bounce-in {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.2); opacity: 1; }
  80%  { transform: scale(0.95); }
  100% { transform: scale(1); }
}