/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  --primary: #a855f7;
  --primary-dark: #9333ea;
  --primary-light: #d8b4fe;
  --accent: #06b6d4;
  --background: #0f0f1e;
  --surface: #1a1a2e;
  --surface-light: #252540;
  --text-primary: #f5f5f7;
  --text-secondary: #b0b0b8;
  --text-muted: #6b6b7a;
  --border: #2d2d42;
  --success: #10b981;
  --error: #ef4444;

  --gradient-primary: linear-gradient(135deg, #a855f7 0%, #06b6d4 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-tertiary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* ===== GLOBAL STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h3 {
  font-size: 1.5rem;
}

p {
  font-size: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--primary-light);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(168, 85, 247, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-secondary:hover {
  background: rgba(168, 85, 247, 0.1);
  transform: translateY(-2px);
}

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 15, 30, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 15, 30, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-symbol {
  color: var(--primary);
  font-size: 1.5rem;
}

.nav-menu {
  display: flex;
  gap: 3rem;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition-fast);
}

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

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-direction: column;
  gap: 0;
  z-index: 999;
}

.mobile-menu.active {
  display: flex;
}

.mobile-link {
  padding: 1rem 2rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: var(--transition-fast);
}

.mobile-link:hover {
  background: var(--surface-light);
  color: var(--primary);
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(168, 85, 247, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 900px;
  z-index: 2;
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-line {
  display: block;
}

.hero-line.highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-decoration {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.gradient-blob {
  position: absolute;
  border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
  filter: blur(40px);
  opacity: 0.3;
}

.blob-1 {
  width: 400px;
  height: 400px;
  background: var(--gradient-primary);
  top: 10%;
  right: 10%;
  animation: float 6s ease-in-out infinite;
}

.blob-2 {
  width: 300px;
  height: 300px;
  background: var(--gradient-secondary);
  bottom: 10%;
  right: 20%;
  animation: float 8s ease-in-out infinite 1s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(30px, -30px);
  }
}

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

/* ===== SECTIONS ===== */
section {
  padding: 100px 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

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

.section-title {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== PROJECTS SECTION ===== */
.projects {
  background: linear-gradient(180deg, transparent 0%, rgba(168, 85, 247, 0.05) 100%);
}

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

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card:hover {
  border-color: var(--primary);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(168, 85, 247, 0.15);
}

.project-image {
  width: 100%;
  height: 200px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

.project-card:hover .project-image {
  transform: scale(1.05);
}

.project-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-title {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex: 1;
  line-height: 1.7;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.tag {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  background: rgba(168, 85, 247, 0.1);
  color: var(--primary-light);
  border-radius: 0.25rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.project-link {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.project-link:hover {
  gap: 1rem;
}

/* ===== TECH STACK SECTION ===== */
.tech-stack {
  background: linear-gradient(180deg, rgba(168, 85, 247, 0.05) 0%, transparent 100%);
}

.tech-categories {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 3rem;
}

.tech-category {
  background: var(--surface);
  padding: 2.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.tech-category:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(168, 85, 247, 0.1);
}

.tech-category-title {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.tech-icons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: 1.5rem;
}

.tech-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 0.75rem;
  background: rgba(168, 85, 247, 0.05);
  transition: var(--transition);
  cursor: pointer;
}

.tech-icon:hover {
  background: rgba(168, 85, 247, 0.15);
  transform: translateY(-4px);
}

.tech-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
  transition: var(--transition-fast);
}

.tech-icon:hover svg {
  color: var(--primary-light);
  transform: scale(1.1);
}

.tech-icon span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  transition: var(--transition-fast);
}

.tech-icon:hover span {
  color: var(--primary);
}

/* ===== CONTACT SECTION ===== */
.contact {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.contact-container {
  max-width: 700px;
  margin: 0 auto;
}

.contact-header {
  text-align: center;
  margin-bottom: 3rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input {
  padding: 0.875rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
}

.form-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

.contact-form .btn {
  margin-top: 1rem;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 4rem 2rem 2rem;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 0.5rem;
}

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

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(168, 85, 247, 0.1);
  border-radius: 0.5rem;
  color: var(--primary);
  transition: var(--transition-fast);
}

.social-link:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-4px);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== ANIMATIONS ===== */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  section {
    padding: 80px 1.5rem;
  }

  .hero {
    padding: 100px 1.5rem 3rem;
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
  }

  .tech-categories {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }

  .nav-menu {
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    display: none;
  }

  section {
    padding: 60px 1.5rem;
  }

  .hero {
    padding: 80px 1.5rem 2rem;
    min-height: auto;
  }

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

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    gap: 1rem;
  }

  .btn {
    width: 100%;
  }

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

  .tech-categories {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .tech-icons {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .section-title {
    font-size: 1.75rem;
  }

  .blob-1,
  .blob-2 {
    display: none;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 1rem;
  }

  .nav-logo {
    font-size: 1.1rem;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .project-card {
    border-radius: 0.75rem;
  }

  .project-content {
    padding: 1.5rem;
  }

  .tech-icons {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .tech-icon {
    padding: 0.75rem;
  }

  .tech-icon svg {
    width: 24px;
    height: 24px;
  }

  .tech-icon span {
    font-size: 0.75rem;
  }

  .footer-content {
    gap: 1.5rem;
  }
}