/* Variables - Theme */
:root {
  --bg-color: #ffffff;
  --text-color: #333333;
  --subtitle-color: #666;
  --card-bg: #f9f9f9;
  --accent-color: #667eea;
  --accent-dark: #764ba2;
  --nav-bg: rgba(255, 255, 255, 0.95);
  --footer-bg: #333333;
  --heading-gradient-start: #667eea;
  --heading-gradient-end: #764ba2;
  --navbar-border-bottom: rgba(255, 255, 255, 0.2);
  --hero-bg-start: #f5f7fa;
  --hero-bg-end: #c3cfe2;
  --hero-dots-color-1: #667eea;
  --hero-dots-color-2: #764ba2;
  --social-link-bg: white;
  --social-link-color: #667eea;
  --contact-item-bg: white;
  --form-border-color: #e1e1e1;
  --form-label-bg: white;
  --form-label-color: #999;
  --stat-bg-start: #f5f7fa;
  --stat-bg-end: #c3cfe2;
  --skill-card-bg: white;
  --skill-card-border: rgba(255, 255, 255, 0.2);
  --project-card-bg: white;
  --project-overlay-bg: rgba(102, 126, 234, 0.9);
}

body.dark {
  --bg-color: #1a1a2e;
  --text-color: #e0e0e0;
  --subtitle-color: #b0b0b0;
  --card-bg: #2a2a4a;
  --accent-color: #7289da;
  --accent-dark: #5865f2;
  --nav-bg: rgba(26, 26, 46, 0.95);
  --footer-bg: #1e1e3b;
  --heading-gradient-start: #7289da;
  --heading-gradient-end: #5865f2;
  --navbar-border-bottom: rgba(255, 255, 255, 0.1);
  --hero-bg-start: #2a2a4a;
  --hero-bg-end: #1a1a2e;
  --hero-dots-color-1: #7289da;
  --hero-dots-color-2: #5865f2;
  --social-link-bg: #3a3a5a;
  --social-link-color: #e0e0e0;
  --contact-item-bg: #2a2a4a;
  --form-border-color: #3a3a5a;
  --form-label-bg: #2a2a4a;
  --form-label-color: #b0b0b0;
  --stat-bg-start: #2a2a4a;
  --stat-bg-end: #1a1a2e;
  --skill-card-bg: #2a2a4a;
  --skill-card-border: rgba(0, 0, 0, 0.2);
  --project-card-bg: #2a2a4a;
  --project-overlay-bg: rgba(88, 101, 242, 0.9);
}

/* General */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  text-decoration: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Playfair Display", serif;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-color);
}

.container {
  margin: 0 auto;
  padding: 0 30px;
}

.section-header {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-align: center;
  background: linear-gradient(
    135deg,
    var(--heading-gradient-start) 0%,
    var(--heading-gradient-end) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  color: var(--subtitle-color);
  margin-bottom: 3rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 30px;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 500;
  text-align: center;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-dark) 100%
  );
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-2px);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--navbar-border-bottom);
  z-index: 1000;
  transition: all 0.3 ease;
}

.nav-container {
  margin: 0 auto;
  padding: 0 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo h2 {
  background: linear-gradient(
    135deg,
    var(--heading-gradient-start) 0%,
    var(--heading-gradient-end) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.8rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  font-size: 1.2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-dark) 100%
  );
  transition: width 0.3s ease;
}

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

.theme-toggle {
  cursor: pointer;
  font-size: 1.3rem;
  color: var(--text-color);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle .bar {
  width: 25px;
  height: 3px;
  background: var(--text-color);
  margin: 3px 0;
  transition: 0.3s;
}

/* Hero */
.hero {
  min-height: 100vh;
  margin-top: 70px;
  display: flex;
  align-items: center;
  background: linear-gradient(
    135deg,
    var(--hero-bg-start) 0%,
    var(--hero-bg-end) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero-container {
  margin: 0 auto;
  padding: 0 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-greeting {
  display: block;
  font-size: 1.5rem;
  color: var(--subtitle-color);
  margin-bottom: 0.5rem;
  font-family: "Inter", sans-serif;
  font-weight: 400;
}

.hero-name {
  display: block;
  font-size: 3.5rem;
  font-weight: 700;
  background: linear-gradient(
    135deg,
    var(--heading-gradient-start) 0%,
    var(--heading-gradient-end) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.8rem;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--subtitle-color);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.hero-social {
  display: flex;
  gap: 1rem;
}

.hero .social-link {
  width: 50px;
  height: 50px;
  background: var(--social-link-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--social-link-color);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.hero .social-link i {
  font-size: 1.5rem;
}

.social-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-dark) 100%
  );
  color: white;
}

.hero-image {
  animation: slideInRight 1s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-image-container {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  height: 500px;
}

.hero-image-container img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.hero-image-container:hover img {
  transform: scale(1.05);
}

.hero-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.3) 0%,
    rgba(118, 75, 162, 0.3) 100%
  );
}

/* About */
.about {
  padding: 100px 0;
  background: var(--bg-color);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h3 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.about-text p {
  margin-bottom: 1.5rem;
  color: var(--subtitle-color);
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  padding: 1.5rem;
  background: linear-gradient(
    135deg,
    var(--stat-bg-start) 0%,
    var(--stat-bg-end) 100%
  );
  border-radius: 15px;
  transition: transform 0.3s ease;
}

.stat:hover {
  transform: translateY(-5px);
}

.stat h4 {
  font-size: 2.5rem;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.stat p {
  color: var(--subtitle-color);
  font-weight: 500;
}

.about-image img {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

/* Skills */
.skills {
  padding: 100px 0;
  background: linear-gradient(
    135deg,
    var(--hero-bg-start) 0%,
    var(--hero-bg-end) 100%
  );
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.skill-card {
  background: var(--skill-card-bg);
  padding: 2rem;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  border: 1px solid var(--skill-card-border);
}

.skill-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.skill-icon {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.skill-card:hover .skill-icon {
  transform: scale(1.1);
  color: var(--accent-dark);
}

.skill-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.skill-card p {
  color: var(--subtitle-color);
  line-height: 1.6;
}

/* Projects */
.projects {
  padding: 100px 0;
  background: var(--bg-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--project-card-bg);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.project-image {
  position: relative;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--project-overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  width: 50px;
  height: 50px;
  background: var(--social-link-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--social-link-color);
  text-decoration: none;
  transition: all 0.3s ease;
}

.project-link:hover {
  transform: scale(1.1);
  background: var(--accent-color);
  color: white;
}

.project-content {
  padding: 2rem;
}

.project-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.project-content p {
  color: var(--text-color);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-dark) 100%
  );
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Contact */
.contact {
  padding: 100px 0;
  background: linear-gradient(
    135deg,
    var(--hero-bg-start) 0%,
    var(--hero-bg-end) 100%
  );
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.contact-info p {
  color: var(--subtitle-color);
  line-height: 1.8;
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--contact-item-bg);
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-item i {
  width: 50px;
  height: 50px;
  background: linear-gradient(
    135deg,
    var(--accent-color) 0%,
    var(--accent-dark) 100%
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

.contact-item h4 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
  color: var(--text-color);
}

.contact-item p {
  color: var(--subtitle-color);
  margin: 0;
}

.contact-form {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
  position: relative;
  margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--form-border-color);
  border-radius: 10px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: transparent;
  color: var(--text-color);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  color: var(--form-label-color);
  transition: all 0.3s ease;
  pointer-events: none;
  border-radius: 25%;
  background: transparent;
  padding: 0 0.5rem;
}

.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label {
  top: -0.5rem;
  left: 0.5rem;
  font-size: 0.8rem;
  color: var(--accent-color);
  background: var(--form-label-bg);
}

/* Footer */
.footer {
  background: var(--footer-bg);
  color: white;
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer .social-link {
  background: #555;
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.footer .social-link i {
  font-size: 1.5rem;
}

.footer .social-link:hover {
  transform: translateY(-3px);
  background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--bg-color);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    padding: 2rem 0;
    font-size: 1.2rem;
    gap: 1.5rem;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-container {
    margin-top: 80px;
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .hero-name {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.4rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-social {
    justify-content: center;
  }

  .section-title {
    font-size: 2rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .contact-form {
    padding: 1.5rem;
  }
}

/* Animation */
.appear {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.appear.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all 0.6s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all 0.6s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-up {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.6s ease;
}

.scale-up.visible {
  opacity: 1;
  transform: scale(1);
}