/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a2332;
  --primary-light: #243447;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --max-width: 1200px;
  --nav-height: 72px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover {
  color: var(--accent-hover);
}

ul {
  list-style: none;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  margin-bottom: 0.5rem;
}

.section-title p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--primary);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--gray-200);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--gray-300);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.hero-content {
  max-width: 700px;
  padding: 2rem 1.5rem;
}

.hero-photo {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  margin: 0 auto 2rem;
  background: var(--gray-200);
}

.hero h1 {
  margin-bottom: 0.75rem;
}

.hero h1 span {
  color: var(--accent);
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Circular CTA buttons */
.cta-circle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  group: true;
}

.cta-circle .circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-md);
}

.cta-circle .circle svg {
  width: 32px;
  height: 32px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cta-circle:hover .circle {
  transform: translateY(-4px);
  background: var(--accent-hover);
  box-shadow: var(--shadow-lg);
}

.cta-circle .label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--gray-200);
}

.card-body {
  padding: 1.5rem;
}

.card-body h3 {
  margin-bottom: 0.5rem;
}

.card-body p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.card-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--gray-100);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-item {
  padding: 1.5rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.skill-item h4 {
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.skill-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: 50px;
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 50px;
  transition: width 1s ease;
  width: 0;
}

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

.skill-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: var(--gray-100);
  color: var(--text);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}

.skill-tag:hover {
  background: var(--accent);
  color: var(--white);
}

/* ===== Gallery ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
  aspect-ratio: 4 / 3;
  background: var(--gray-200);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item .overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 35, 50, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover .overlay {
  opacity: 1;
}

.overlay svg {
  width: 40px;
  height: 40px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.lightbox-close svg {
  width: 32px;
  height: 32px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  cursor: pointer;
  padding: 1rem;
  border-radius: 50%;
  transition: background var(--transition);
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-nav svg {
  width: 24px;
  height: 24px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
}

.lightbox-prev {
  left: 1.5rem;
}

.lightbox-next {
  right: 1.5rem;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  transition: border-color var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

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

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

.contact-info-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-info-item .icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item .icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 2;
}

.contact-info-item h4 {
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.contact-info-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

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

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.social-link:hover {
  background: var(--accent);
}

.social-link svg {
  width: 20px;
  height: 20px;
  fill: var(--text-light);
  transition: fill var(--transition);
}

.social-link:hover svg {
  fill: var(--white);
}

/* ===== Page Header ===== */
.page-header {
  padding: 8rem 0 4rem;
  background: var(--gray-50);
  text-align: center;
}

.page-header h1 {
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Footer ===== */
.footer {
  background: var(--primary);
  color: var(--gray-400);
  padding: 3rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--gray-400);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--white);
}

.footer .social-links {
  margin-top: 0;
}

.footer .social-link {
  background: var(--primary-light);
}

.footer .social-link svg {
  fill: var(--gray-400);
}

.footer .social-link:hover {
  background: var(--accent);
}

.footer .social-link:hover svg {
  fill: var(--white);
}

.footer-bottom {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--primary-light);
  font-size: 0.85rem;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-200);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent);
  transform: translateX(-6px);
}

.timeline-content h3 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.timeline-date {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.timeline-content p {
  font-size: 0.95rem;
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 2rem;
    gap: 1.25rem;
    transform: translateY(-100%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a {
    font-size: 1.1rem;
  }

  .hero-photo {
    width: 140px;
    height: 140px;
  }

  .hero-buttons {
    gap: 1rem;
  }

  .cta-circle .circle {
    width: 64px;
    height: 64px;
  }

  .cta-circle .circle svg {
    width: 26px;
    height: 26px;
  }

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

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

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

  section {
    padding: 3.5rem 0;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }

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