/* ========== CSS VARIABLES & RESET ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* LIGHT MODE (default) */
body.light-mode {
  --primary: #7b2eda;
  --primary-light: #9f5ef0;
  --primary-soft: #f3eaff;
  --gray-bg: #f9fafc;
  --text-dark: #1e1e2f;
  --text-soft: #4a4a5e;
  --border-light: #eaeef2;
  --card-bg: #ffffff;
  --footer-bg: #16161f;
  --footer-text: #aaa;
  --navbar-bg: rgba(255,255,255,0.85);
  --shadow-color: rgba(0,0,0,0.05);
  --btn-outline-hover: var(--primary-soft);
}

/* DARK MODE */
body.dark-mode {
  --primary: #b185ff;
  --primary-light: #c9a9ff;
  --primary-soft: #332a4a;
  --gray-bg: #1e1e2a;
  --text-dark: #ededf2;
  --text-soft: #b5b5c8;
  --border-light: #2f2f3f;
  --card-bg: #252535;
  --footer-bg: #0c0c14;
  --footer-text: #8e8ea8;
  --navbar-bg: rgba(20,20,30,0.9);
  --shadow-color: rgba(0,0,0,0.4);
  --btn-outline-hover: #332a4a;
}

body {
  background-color: var(--gray-bg);
  color: var(--text-dark);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ========== NAVBAR ========== */
.navbar {
  position: sticky;
  top: 0;
  background: var(--navbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px var(--shadow-color);
  z-index: 100;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-light);
}

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

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-dark);
  letter-spacing: -0.5px;
}
.logo span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 2.2rem;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  font-weight: 500;
  color: var(--text-soft);
  transition: color 0.2s ease;
  font-size: 1rem;
}
.nav-links a:hover {
  color: var(--primary);
}

.theme-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: 40px;
  padding: 0.4rem 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: all 0.2s;
  box-shadow: 0 2px 6px var(--shadow-color);
}
.theme-toggle i {
  color: var(--primary);
  font-size: 1rem;
}
.theme-toggle:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

/* ========== SECTIONS ========== */
section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
  color: var(--text-dark);
  text-align: center;
}
.section-title::after {
  content: '';
  display: block;
  width: 70px;
  height: 4px;
  background: var(--primary);
  margin: 0.8rem auto 0;
  border-radius: 4px;
}

/* ========== HERO ========== */
.hero {
  padding: 3rem 0 4rem 0;
  text-align: center;
  background: linear-gradient(to bottom, var(--card-bg), var(--gray-bg));
}
.avatar-placeholder {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--primary-light), var(--primary));
  margin: 0 auto 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 4rem;
  font-weight: 400;
  box-shadow: 0 20px 30px -8px rgba(123,46,218,0.25);
}
.hero h1 {
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-dark);
  line-height: 1.2;
}
.hero .subhead {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--primary);
  margin: 0.5rem 0 1rem;
}
.hero .tagline {
  font-size: 1.2rem;
  color: var(--text-soft);
  max-width: 650px;
  margin: 1rem auto 2rem;
}
.btn-group {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  border-radius: 60px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  font-size: 1rem;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 8px 18px -6px rgba(123,46,218,0.3);
}
.btn-primary:hover {
  background-color: #6829b8;
  transform: translateY(-3px);
  box-shadow: 0 12px 22px -8px rgba(123,46,218,0.4);
}
.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background-color: var(--btn-outline-hover);
  border-color: var(--primary);
  transform: translateY(-3px);
}

/* ========== ABOUT ========== */
.about-text {
  max-width: 900px;
  margin: 0 auto;
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 28px;
  box-shadow: 0 10px 30px -10px var(--shadow-color);
  border: 1px solid var(--border-light);
  font-size: 1.1rem;
  color: var(--text-soft);
  line-height: 1.8;
}
.about-text strong {
  color: var(--primary);
}
.about-list {
  margin-top: 1.2rem;
  list-style: none;
}
.about-list li {
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.about-list li span:first-child {
  color: var(--primary);
  font-weight: bold;
  font-size: 1.2rem;
  line-height: 1.4;
}
.about-quote {
  margin-top: 2rem;
  font-style: italic;
  color: var(--primary);
  font-size: 1.1rem;
  padding: 1.5rem;
  background: var(--primary-soft);
  border-radius: 20px;
  border: 1px solid var(--border-light);
  text-align: center;
}

/* ========== SKILLS SECTION ========== */
.skills-section {
  padding: 5rem 0;
  background: var(--gray-bg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.skill-category {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 2rem 1.5rem;
  box-shadow: 0 10px 30px -10px var(--shadow-color);
  border: 1px solid var(--border-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 35px -12px var(--primary);
  border-color: var(--primary-light);
}

.category-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 2px solid var(--primary-soft);
  padding-bottom: 0.8rem;
}

.category-title i {
  color: var(--primary);
  font-size: 1.4rem;
}

.skill-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.skill-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 1rem;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.5;
}

.skill-bullet {
  color: var(--primary);
  font-weight: bold;
  font-size: 1.2rem;
}

/* ========== PROJECTS / CASE STUDIES ========== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.project-card {
  background: var(--card-bg);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 12px 30px -10px var(--shadow-color);
  transition: all 0.25s ease;
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 28px 38px -16px var(--primary);
  border-color: var(--primary-light);
}
.project-img {
  height: 160px;
  background: linear-gradient(135deg, var(--primary-soft), var(--card-bg));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 3rem;
  border-bottom: 1px solid var(--border-light);
}
.project-content {
  padding: 1.8rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.project-title {
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  color: var(--text-dark);
  line-height: 1.4;
}
.project-desc {
  color: var(--text-soft);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
  flex: 1;
}
.project-stats {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}
.stat-badge {
  background: var(--primary-soft);
  color: var(--primary);
  padding: 0.3rem 1rem;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* ========== PROJECT BUTTON STYLES ========== */
.project-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary-soft);
  padding: 0.75rem 1.5rem;
  border-radius: 60px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  transition: all 0.2s;
  border: 1.5px solid var(--border-light);
  cursor: pointer;
  margin-top: 0.5rem;
  align-self: flex-start;
}

.project-button i {
  color: var(--primary);
  font-size: 1.2rem;
}

.project-button:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.project-button:hover i {
  color: white;
}

/* Active navigation link style */
.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}

/* ========== CTA SECTION ========== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), #4b1b8c);
  color: white;
  padding: 5rem 0;
  text-align: center;
  margin: 2rem 0 0;
}
.cta-section h2 {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.cta-section p {
  font-size: 1.3rem;
  opacity: 0.9;
  margin: 1rem 0 2rem;
}
.cta-section .btn-outline {
  border-color: white;
  color: white;
  background: transparent;
}
.cta-section .btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: white;
}

/* ========== CONTACT ========== */
.contact-links {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  padding: 1rem 2.2rem;
  border-radius: 60px;
  border: 1px solid var(--border-light);
  box-shadow: 0 5px 12px var(--shadow-color);
  transition: all 0.2s;
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
}
.contact-item i {
  font-size: 1.6rem;
  color: var(--primary);
}
.contact-item:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: scale(1.02);
}

/* ========== FOOTER ========== */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  text-align: center;
  padding: 2rem;
  font-size: 0.95rem;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.skill-category {
  animation: fadeInUp 0.6s ease forwards;
}

.skill-category:nth-child(1) { animation-delay: 0.1s; }
.skill-category:nth-child(2) { animation-delay: 0.2s; }
.skill-category:nth-child(3) { animation-delay: 0.3s; }
.skill-category:nth-child(4) { animation-delay: 0.4s; }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 700px) {
  .nav-container {
    flex-direction: column;
    gap: 0.8rem;
  }
  .nav-links {
    gap: 1.2rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .section-title {
    font-size: 1.9rem;
  }
  .contact-links {
    gap: 1rem;
  }
  .contact-item {
    width: 100%;
    justify-content: center;
  }
  .about-text {
    padding: 1.5rem;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .skill-category {
    padding: 1.5rem;
  }
}