/* ===================== Reset & Base ===================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Roboto',sans-serif;background:#f0f3f7;color:#333;line-height:1.6}
img{max-width:100%;display:block}
a{text-decoration:none}
ul{list-style:none}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===================== Layout ===================== */
.container{max-width:1200px;margin:0 auto;padding:0 5%}
section{padding:90px 0}

/* ===================== Navigation ===================== */
#navbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);box-shadow:0 5px 15px rgba(0,0,0,.05)}
.nav-container{display:flex;justify-content:space-between;align-items:center;padding:1rem 5%}
.logo{font-size:1.8rem;font-weight:700;color:#2575fc}
.nav-links{display:flex;gap:1.5rem}
.nav-links a{color:#2575fc;font-weight:600;position:relative;transition:color .3s}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-4px;width:0;height:2px;background:#6a11cb;transition:width .3s}
.nav-links a:hover{color:#6a11cb}
.nav-links a:hover::after{width:100%}

/* ===================== Hero ===================== */
#home{color:#fff;text-align:center;padding:140px 1rem;background:linear-gradient(135deg,#6a11cb,#2575fc);background-attachment:fixed}
#home h1{font-size:3.5rem;font-weight:900;text-shadow:2px 2px 8px rgba(0,0,0,.3)}
#home p{font-size:1.3rem;margin:1rem 0;text-shadow:1px 1px 5px rgba(0,0,0,.2)}
.btn-scroll{display:inline-block;margin-top:1.5rem;padding:.75rem 1.6rem;background:rgba(255,255,255,.95);color:#2575fc;border-radius:50px;font-weight:600;transition:transform .3s,background .3s}
.btn-scroll:hover{background:#fff;transform:translateY(-5px)}

/* ===================== Headings ===================== */
section h2{font-size:2.5rem;color:#2575fc;text-align:center;margin-bottom:2.5rem;position:relative}
section h2::after{content:'';display:block;width:80px;height:3px;background:#6a11cb;margin:10px auto 0;border-radius:2px}

/* ===================== Projects ===================== */
/* REMOVED: .filters, .filter-btn, .active styles */

/* Project Grid */
.projects-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:1.8rem;
}

.project-card{
  background:rgba(255,255,255,.15);
  backdrop-filter:blur(10px);
  border-radius:20px;
  padding:1.5rem;
  text-align:center;
  box-shadow:0 15px 35px rgba(0,0,0,.08);
  opacity:0;
  transform:translateY(30px) scale(.95);
  transition:opacity .6s,transform .6s,box-shadow .3s;
}
.project-card.visible{
  opacity:1;
  transform:translateY(0) scale(1);
}
.project-card:hover{
  transform:translateY(-10px) scale(1.03);
  box-shadow:0 25px 50px rgba(0,0,0,.15);
}
.project-card img{
  border-radius:15px;
  margin-bottom:1rem;
  transition:transform .5s,box-shadow .5s;
}
.project-card img:hover{
  transform:translateY(-8px) scale(1.05);
  box-shadow:0 20px 40px rgba(0,0,0,.15);
}
.project-card h3{
  font-size:1.7rem;
  color:#6a11cb;
  margin-bottom:.6rem;
}
.project-card p{
  color:#555;
  margin-bottom:1rem;
}
.project-card .btn{
  display:inline-block;
  padding:.75rem 1.6rem;
  background:#2575fc;
  color:#fff;
  border-radius:50px;
  font-weight:600;
  transition:background .3s,transform .3s;
}
.project-card .btn:hover{
  background:#6a11cb;
  transform:translateY(-3px) scale(1.05);
}

/* ===================== Contact ===================== */
.contact-wrapper{
  display:flex;
  flex-wrap:wrap;
  gap:2.5rem;
  margin-top:2rem;
  justify-content:center;
}
.contact-form{
  flex:1 1 300px;
  max-width:500px;
  display:flex;
  flex-direction:column;
  gap:1.1rem;
}
.contact-form input,
.contact-form textarea{
  padding:1rem;
  border:none;
  border-radius:15px;
  background:rgba(255,255,255,.2);
  color:#333;
  font-size:1rem;
  outline:none;
  transition:background .3s,box-shadow .3s;
}
.contact-form input:focus,
.contact-form textarea:focus{
  background:rgba(255,255,255,.3);
  box-shadow:0 0 15px rgba(37,117,252,.3);
}
.contact-form button{
  align-self:flex-start;
  padding:.75rem 1.6rem;
  background:#2575fc;
  color:#fff;
  border:none;
  border-radius:50px;
  font-weight:600;
  cursor:pointer;
  transition:background .3s,transform .3s;
}
.contact-form button:hover{
  background:#6a11cb;
  transform:translateY(-3px) scale(1.05);
}
.contact-info-social{
  flex:1 1 250px;
  display:flex;
  flex-direction:column;
  gap:1.5rem;
  align-items:center; /* Center social icons */
}
.contact-info a{
  color:#2575fc;
  transition:color .3s;
}
.contact-info a:hover{
  color:#6a11cb;
}

/* Contact Form Validation Styles */
.form-group {
  position: relative;
  display: flex;
  flex-direction: column;
}
.error-msg {
  font-size: 0.85rem;
  margin-top: 0.4rem;
  min-height: 1.2rem;
}
.contact-form input,
.contact-form textarea {
  transition: border 0.3s, background 0.3s;
}

/* ===================== Social Links (Side-by-Side) ===================== */
.social-links{
  display:flex;
  justify-content:center;
  gap:1rem;
  margin:0;
  padding:0;
}
.social-links a{
  display:flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  background:#2575fc;
  color:#fff;
  border-radius:50%;
  font-size:1.5rem;
  transition:background .3s,transform .3s,box-shadow .3s;
}
.social-links a:hover{
  background:#6a11cb;
  transform:translateY(-3px) scale(1.1);
  box-shadow:0 5px 15px rgba(37,117,252,.3);
}

/* ===================== Footer ===================== */
footer{
  text-align:center;
  padding:2.2rem 0;
  background:#333;
  color:#fff;
}

/* ===================== Responsive ===================== */
@media (max-width:768px){
  .nav-container{flex-direction:column;gap:1rem}
  .nav-links{gap:1rem}
  #home{padding:100px 1rem}
  #home h1{font-size:2.8rem}
  .contact-wrapper{flex-direction:column;align-items:center}
  .contact-info-social{text-align:center}
  .social-links{justify-content:center}
}

/* ===================== Reduced Motion ===================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

/* ===================== Image Fade-in ===================== */
img[loading="lazy"]{opacity:0;transition:opacity .3s}
img[loading="lazy"].loaded{opacity:1}


/* ==== NEW STYLES ==== */

/* Dark Mode Toggle */
#theme-toggle {
  position: fixed; top: 20px; right: 20px; z-index: 1001;
  background: rgba(255,255,255,.2); border: none; border-radius: 50%;
  width: 48px; height: 48px; font-size: 1.4rem; color: #fff;
  cursor: pointer; backdrop-filter: blur(10px);
  transition: all .3s;
}
#theme-toggle:hover { transform: scale(1.1); }

/* Progress Bar */
#progress-bar {
  position: fixed; top: 0; left: 0; height: 4px;
  background: #6a11cb; width: 0; z-index: 1002;
  transition: width .2s;
}

/* Custom Cursor */
.cursor {
  width: 18px; height: 18px; border: 2px solid #64b5f6;
  border-radius: 50%; position: fixed; pointer-events: none;
  transform: translate(-50%, -50%); z-index: 9999;
  transition: transform .1s, width .3s, height .3s;
}
.cursor::after {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 6px; height: 6px; background: #64b5f6;
  border-radius: 50%; transform: translate(-50%, -50%);
}

/* Particles */
#particles-js {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: -1; pointer-events: none;
}

/* Visitor Counter */
.visitor-counter {
  position: fixed; bottom: 20px; left: 20px; z-index: 1000;
  background: rgba(0,0,0,.6); color: #fff; padding: .5rem 1rem;
  border-radius: 20px; font-size: .9rem; backdrop-filter: blur(8px);
}

/* GitHub Stats */
.github-stats {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center;
  margin: 2rem 0;
}
.github-stats img {
  border-radius: 12px; box-shadow: 0 8px 20px rgba(0,0,0,.1);
}

/* Theme Toggle Visibility in Light Mode */
#theme-toggle {
  background: rgba(0, 0, 0, 0.12) !important;  /* Dark tint in light mode */
  color: #222 !important;                    /* Dark icon */
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

/* In dark mode: make it visible with light tint */
[data-theme="dark"] #theme-toggle,
#theme-toggle.fa-sun {
  background: rgba(255, 255, 255, 0.15) !important;
  color: #fff !important;
}

/* ---- Success overlay ---- */
#form-success {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s, visibility .35s;
  z-index: 9999;
}
#form-success.show { opacity: 1; visibility: visible; }

#form-success .msg {
  background:#28a745;
  color:#fff;
  padding:1.5rem 2.5rem;
  border-radius:8px;
  font-weight:600;
  box-shadow:0 8px 30px rgba(0,0,0,.3);
  text-align:center;
  animation:pop .4s ease-out;
}
@keyframes pop{
  0%{transform:scale(.8);opacity:0}
  100%{transform:scale(1);opacity:1}
}

/* ---- Button loading ---- */
.btn.loading {
  pointer-events:none;
  opacity:.7;
}
.btn.loading::after{
  content:"";
  display:inline-block;
  width:1em;height:1em;
  margin-left:.5em;
  border:2px solid #fff;
  border-radius:50%;
  border-top-color:transparent;
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}