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

html {
  font-size: 16px;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

:root {
  --color-primary:       #2c2b30;   
  --color-primary-dark: #2c2b30;
  --color-primary-light:#f2c4ce;
  --color-background:  #4f4f51;
  --color-text:        #111827;    
  --color-muted:       #6b7280;
  --color-border:      #e5e7eb;
}

:root {
  --font-base: 1rem;
  --font-lg:   1.25rem;
  --font-xl:   1.5rem;
  --font-2xl:  1.875rem;
  --font-3xl:  2.5rem;
}

body          { font-size: var(--font-base); }
h1            { font-size: var(--font-3xl); font-weight: 700; margin-bottom: 1rem; }
p             { color: var(--color-muted); }

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 5%;
  background-color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  position: relative;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  transition: color 0.2s;
}

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

.menu-toggle {
  display: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  width: 26px;
  height: 3px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: white;
    padding: 1.5rem 5%;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    gap: 1.2rem;
  }
  
  #menu-toggle:checked ~ .nav-links {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  #menu-toggle:checked + .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  #menu-toggle:checked + .hamburger span:nth-child(2) {
    opacity: 0;
  }
  
  #menu-toggle:checked + .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
}

.hero {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 5%;
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
}

.hero h1 {
  color: var(--color-primary-dark);
}

.btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.9rem 2.2rem;
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 16px rgba(13,148,136,0.2);
}

.projects {
  padding: 5rem 5% 7rem;
  background-color: var(--color-background);
}

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

.projects h2 {
  text-align: center;
  font-size: var(--font-2xl);
  margin-bottom: 3rem;
  color: var(--color-primary-dark);
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.project-card {
  background-color: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.project-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;   
  display: block;
}

.card-content {
  padding: 1.8rem 1.5rem;
  text-align: left;
}

.card-content h3 {
  font-size: 1.4rem;
  margin-bottom: 0.8rem;
  color: var(--color-text);
}

.card-content p {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.card-btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.card-btn:hover {
  background-color: var(--color-primary-dark);
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.about {
  padding: 6rem 5% 8rem;
  background-color: white;
}

.about h2 {
  text-align: center;
  font-size: var(--font-2xl);
  margin-bottom: 4rem;
  color: var(--color-primary-dark);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.about-text {
  flex: 1;
}

.about-text p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.about-text .btn {
  margin-top: 1.5rem;
  padding: 1rem 2.2rem;
}

.about-photo {
  flex: 1;
  max-width: 400px;
}

.about-photo img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  object-fit: cover;
}

@media (min-width: 768px) {
  .about-content {
    flex-direction: row;
    gap: 4rem;
    text-align: left;
  }
  
  .about-text {
    text-align: left;
  }
}

.about-photo {
  flex: 1;
  max-width: 380px;              
  text-align: center;
}

.about-photo img {
  width: 100%;
  max-width: 320px;              
  height: auto;
  border-radius: 50%;             
  border: 6px solid var(--color-primary-light);
  box-shadow: 0 12px 32px rgba(97, 233, 233, 0.12);
  object-fit: cover;
  transition: transform 0.4s ease;
}

.about-photo img:hover {
  transform: scale(1.05);       
}

@media (min-width: 768px) {
  .about-content {
    flex-direction: row;
    gap: 5rem;
    align-items: center;
  }
  
  .about-photo {
    order: 2;                    
  }
  
  .about-text {
    order: 1;
  }
}

.contact {
  padding: 6rem 5% 8rem;
  background-color: whitesmoke;
  text-align: center;
}

.contact h2 {
  font-size: var(--font-2xl);
  margin-bottom: 1rem;
  color: var(--color-primary-dark);
}

.contact-subtitle {
  font-size: 1.1rem;
  color: var(--color-muted);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Form styling */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1.2rem 1rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  background: white;
  transition: all 0.3s ease;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form-group label {
  position: absolute;
  top: 1.2rem;
  left: 1rem;
  color: var(--color-muted);
  font-size: 1rem;
  pointer-events: none;
  transition: all 0.3s ease;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: 0.4rem;
  left: 0.8rem;
  font-size: 0.8rem;
  color: var(--color-primary);
  background: white;
  padding: 0 0.3rem;
}

.form-group input:required:invalid:focus,
.form-group textarea:required:invalid:focus {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.submit-btn {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  align-self: center;
  margin-top: 1rem;
}

@media (min-width: 768px) {
  .contact {
    padding: 8rem 5%;
  }
}

.footer {
  background-color: var(--color-primary-dark);
  color: white;
  padding: 4rem 5% 2rem;
  text-align: center;
}

.footer .container {
  max-width: 1200px;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.footer-col {
  flex: 1;
  min-width: 220px;
}

.footer-col h3 {
  font-size: 1.3rem;
  margin-bottom: 1.2rem;
  color: white;
}

.footer-col p {
  color: #d1d5db;
  line-height: 1.6;
  font-size: 0.95rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col ul li {
  margin-bottom: 0.8rem;
}

.footer-col a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-col a:hover {
  color: white;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 2rem;
  font-size: 0.9rem;
  color: #d1d5db;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .social-links {
    align-items: center;
  }
}

@media (min-width: 769px) {
  .footer-content {
    justify-content: space-around;
  }

}