/* ======== Global ======== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #0a0a0a;
  color: #fff;
  overflow-x: hidden;
  position: relative;
}

/* ======== Background Animation ======== */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: radial-gradient(circle at 20% 50%, rgba(0, 234, 255, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(138, 43, 226, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 40% 20%, rgba(255, 0, 128, 0.1) 0%, transparent 50%);
  animation: bgShift 20s ease infinite;
}

@keyframes bgShift {
  0%, 100% {opacity: 1; transform: scale(1);}
  50% {opacity: 0.8; transform: scale(1.1);}
}

/* ======== Hero Section ======== */
.hero {
  width: 100%;
  min-height: 100vh;
  padding: 0 6%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

.hero-content {
  animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
  from {opacity: 0; transform: translateY(30px);}
  to {opacity: 1; transform: translateY(0);}
}

.hero h1 {
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 15px;
  background: linear-gradient(135deg, #fff, #00eaff, #8a2be2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
  0%, 100% {background-position: 0% 50%;}
  50% {background-position: 100% 50%;}
}

.hero .tagline {
  font-size: 1.3rem;
  color: #aaa;
  max-width: 700px;
  margin: 20px auto;
  line-height: 1.6;
}

/* ======== Buttons ======== */
.btns {
  margin-top: 35px;
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 14px 32px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  font-size: 1rem;
}

.primary-btn {
  background: linear-gradient(135deg, #00eaff, #0099ff);
  color: #000;
  box-shadow: 0 5px 25px rgba(0,234,255,0.4);
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 35px rgba(0,234,255,0.6);
}

.secondary-btn {
  border: 2px solid #00eaff;
  color: #00eaff;
  background: transparent;
}

.secondary-btn:hover {
  background: #00eaff;
  color: #000;
}

/* ======== Sections ======== */
section {
  padding: 100px 6%;
  position: relative;
}

.section-title {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 60px;
  background: linear-gradient(135deg, #fff, #00eaff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ======== About Section ======== */
.about-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #ccc;
  margin-bottom: 30px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.stat-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.1);
  transition: 0.3s;
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: #00eaff;
  box-shadow: 0 10px 40px rgba(0,234,255,0.2);
}

.stat-card h3 {
  font-size: 2.5rem;
  color: #00eaff;
  margin-bottom: 10px;
}

.stat-card p {
  color: #aaa;
  font-size: 1rem;
}

/* ======== Skills Section ======== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 25px;
  max-width: 1000px;
  margin: 0 auto;
}

.skill-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  padding: 25px;
  border-radius: 15px;
  border: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  transition: 0.3s;
  cursor: pointer;
}

.skill-card:hover {
  transform: translateY(-8px) scale(1.05);
  border-color: #00eaff;
  box-shadow: 0 15px 50px rgba(0,234,255,0.3);
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.skill-card h4 {
  font-size: 1.1rem;
  color: #fff;
}

/* ======== Projects Section ======== */
.projects {
  background: rgba(255,255,255,0.02);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 35px;
  max-width: 1200px;
  margin: 0 auto;
}

.project-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: 20px;
  transition: 0.4s;
  border: 1px solid rgba(255,255,255,0.1);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,234,255,0.1), transparent);
  transition: 0.5s;
}

.project-card:hover::before {
  left: 100%;
}

.project-card:hover {
  transform: translateY(-10px);
  border-color: #00eaff;
  box-shadow: 0 20px 60px rgba(0,234,255,0.3);
}

.project-card h3 {
  margin-bottom: 15px;
  font-size: 1.5rem;
  color: #00eaff;
}

.project-card p {
  color: #bbb;
  margin-bottom: 20px;
  line-height: 1.6;
}

.project-card a {
  color: #00eaff;
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  transition: 0.3s;
}

.project-card a:hover {
  transform: translateX(5px);
}

/* ======== Learning Section ======== */
.learning-tabs {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 28px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 25px;
  color: #fff;
  cursor: pointer;
  transition: 0.3s;
  font-weight: 600;
}

.tab-btn:hover {
  background: rgba(0,234,255,0.1);
  border-color: #00eaff;
}

.tab-btn.active {
  background: linear-gradient(135deg, #00eaff, #0099ff);
  color: #000;
  border-color: transparent;
}

.learning-content {
  display: none;
  animation: fadeIn 0.5s ease;
}

.learning-content.active {
  display: block;
}

@keyframes fadeIn {
  from {opacity: 0;}
  to {opacity: 1;}
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.note-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  padding: 25px;
  border-radius: 15px;
  border: 1px solid rgba(255,255,255,0.1);
  transition: 0.3s;
}

.note-card:hover {
  transform: translateY(-5px);
  border-color: #8a2be2;
  box-shadow: 0 10px 40px rgba(138,43,226,0.2);
}

.note-card h3 {
  color: #8a2be2;
  margin-bottom: 15px;
  font-size: 1.4rem;
}

.note-card p {
  color: #ccc;
  line-height: 1.6;
  margin-bottom: 15px;
}

.note-card .note-link {
  color: #00eaff;
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  transition: 0.3s;
}

.note-card .note-link:hover {
  transform: translateX(5px);
}

/* ======== Contact Section ======== */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-content p {
  font-size: 1.2rem;
  color: #ccc;
  margin-bottom: 40px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 25px;
  flex-wrap: wrap;
}

.social-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  text-decoration: none;
  color: #fff;
  transition: 0.3s;
}

.social-btn:hover {
  transform: translateY(-5px) scale(1.1);
  border-color: #00eaff;
  background: rgba(0,234,255,0.1);
  box-shadow: 0 10px 30px rgba(0,234,255,0.3);
}

/* ======== Footer ======== */
footer {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 60px 6% 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto 40px;
}

.footer-section h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-section p {
  color: #888;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-section a {
  display: block;
  color: #888;
  text-decoration: none;
  margin-bottom: 12px;
  transition: 0.3s;
}

.footer-section a:hover {
  color: #00eaff;
  padding-left: 5px;
}

.social-icons {
  display: flex;
  gap: 15px;
}

.social-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  font-size: 1.2rem;
  transition: 0.3s;
}

.social-icon:hover {
  background: linear-gradient(135deg, #00eaff, #8a2be2);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: #666;
  font-size: 0.9rem;
}

/* ======== Responsive ======== */
@media (max-width: 850px) {
  .hero {margin-top: 12px;}
  .hero h1 {font-size: 2.8rem;}
  .hero .tagline {font-size: 1.1rem;}
  .section-title {font-size: 2.2rem;}
  .project-grid, .notes-grid {grid-template-columns: 1fr;}
}

@media (max-width: 500px) {
   .hero {margin-top: 12px;}
  .hero h1 {font-size: 2.2rem;}
  .btns {flex-direction: column; align-items: center;}
  .btn {width: 100%; max-width: 300px;}
}

@media (max-width: 640px) {
   .hero {margin-top: 30px;}
  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}