/* 1. VARIABLES AND RESET */
:root {
  --primary-dark: #0f172a;
  --accent-green: #2d8b5a;
  --accent-soft: #f0f9f4;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --text-main: #334155;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-padding {
  padding: 6rem 0;
}

/* 2. HEADER AND NAVIGATION */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid #e2e8f0;
}

.navbar-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
  color: var(--primary-dark);
}

.atom-icon {
  height: 40px;
  transition: var(--transition);
}

.brand:hover .atom-icon {
  transform: rotate(180deg);
}

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

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

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

.cv-link {
  color: var(--accent-green) !important;
  font-weight: 700 !important;
  border: 1px solid var(--accent-green);
  padding: 5px 12px;
  border-radius: 6px;
  transition: var(--transition);
}

.cv-link:hover {
  background-color: var(--accent-green);
  color: white !important;
}

/* 3. HERO SECTION */
.hero {
  padding: 8rem 0 5rem;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--primary-dark);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.text-accent {
  color: var(--accent-green);
}

.btn-primary {
  display: inline-block;
  background: var(--accent-green);
  color: var(--white);
  padding: 0.9rem 2.2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  margin-top: 1rem;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(45, 139, 90, 0.2);
}

/* 4. ABOUT SECTION (Grid for image and text) */
/* Space between text and image on desktop */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 5rem; /* Increased space between text and image here */
  align-items: start; /* Aligns the top of the image with the top of the text */
}

.section-title {
  font-size: 2.2rem;
  color: var(--primary-dark);
  margin-bottom: 1.5rem;
}

.text-left {
  text-align: left;
}

/* IMAGE CONTROL */
.about-image-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-img {
  width: 100%;
  max-width: 350px; /* Reduced to 350px for better balance */
  height: 450px; /* Slightly elongated rectangular shape */
  object-fit: cover;
  object-position: top;
  border-radius: 20px;
  border: 8px solid var(--white);
  box-shadow: var(--shadow);

  /* BLACK AND WHITE VARIANT */
  filter: grayscale(100%);
  transition: var(--transition); /* Smooth color transition */
}

/* When someone hovers over the image, the color returns */
.profile-img:hover {
  filter: grayscale(0%);
  transform: scale(1.02); /* Slightly enlarges, gives a sense of depth */
}

/* 5. ACHIEVEMENT CARDS */
.achievements-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.achievement-card {
  background: var(--white);
  padding: 1.2rem;
  border-radius: 12px;
  border-left: 5px solid var(--accent-green);
  display: flex;
  align-items: center;
  gap: 1.2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.achievement-card:hover {
  transform: translateX(10px);
}

.achievement-icon {
  font-size: 2rem;
}

.achievement-rank {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.achievement-title {
  font-size: 1.1rem;
  color: var(--primary-dark);
  margin: 2px 0;
}

.achievement-desc {
  font-size: 0.9rem;
  color: var(--text-main);
}

/* 6. PROJECTS (Accordion style) */
.project-item {
  background: var(--white);
  border-radius: 12px;
  margin-bottom: 1.2rem;
  border: 1px solid #e2e8f0;
  overflow: hidden;
  transition: var(--transition);
}

.project-header {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.project-category {
  color: var(--accent-green);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.project-content {
  max-height: 0;
  overflow: hidden;
  transition: all 0.4s ease-in-out;
  display: flex;
  flex-direction: column;
  gap: 15px;
  /* Padding must be 0 while closed */
  padding: 0 20px;
  opacity: 0;
}

.project-item.active .project-content {
  max-height: 1500px; /* Increased to fit long content */
  padding-top: 20px;
  padding-bottom: 30px;
  opacity: 1;
}

.project-features {
  text-align: left; /* Align text to the left */
  margin: 15px 0; /* Space above and below the list */
  padding-left: 20px; /* Space on the left so the bullets have room */
  list-style-type: disc; /* Classic filled bullets */
}

.project-features li {
  margin-bottom: 5px; /* Space between two bullet points */
  font-size: 0.95rem; /* Slightly smaller font for a more elegant look */
  color: #444; /* Dark gray color for better readability */
}

.toggle-arrow {
  color: var(--accent-green);
  transition: var(--transition);
}

.project-item.active .toggle-arrow {
  transform: rotate(180deg);
}

.project-img {
  width: 100%;
  max-width: 550px; /* Can increase if you want them wider */
  height: auto; /* KEY: Prevent the image from ever being cropped */
  display: block;
  margin: 0 auto 15px auto;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  /* Removed object-fit: cover because it causes cropping issues */
}

/* Special rule just for the "narrowed" image */
.img-narrow {
  max-width: 350px; /* Reduces the width, and since height:auto, the height will reduce proportionally */
}

.project-links {
  display: flex;
  gap: 15px;
  margin-top: auto; /* Pushes buttons to the bottom if text lengths vary */
  padding-top: 20px;
}

.link-btn {
  text-decoration: none;
  color: var(--white);
  background-color: var(--accent-green);
  padding: 8px 20px;
  border-radius: 5px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--accent-green);
}

.link-btn:hover {
  background-color: transparent;
  color: var(--accent-green);
}

/* Modificator for GitHub button - GRAY VARIANT */
.link-btn.github {
  background-color: #555;
  border-color: #555;
}

.link-btn.github:hover {
  background-color: transparent;
  color: #555;
  border-color: #555;
}

/* 7. METHODOLOGY */
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.method-card {
  background: var(--white);
  padding: 3rem 2rem;
  border-radius: 16px;
  text-align: center;
  transition: var(--transition);
}

.method-card:hover {
  background: var(--accent-soft);
}

.method-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

/* 8. FAQ SECTION - Using details and summary tags */
#faq .faq-wrapper {
  max-width: 800px;
  margin: 2rem auto 0;
}

details {
  background: var(--white);
  padding: 0; /* Reset padding so summary covers the full width */
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 1.2rem;
  overflow: hidden; /* Important for animation */
  border: 1px solid #edf2f7;
  transition: transform 0.3s ease;
}

details:hover {
  transform: translateY(-2px);
}

details .faq-content {
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  max-height: 0;
  display: block; /* Important for animation */
}

details[open] .faq-content {
  max-height: 500px; /* Enough space to see everything */
}

summary {
  padding: 1.5rem 2rem;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  list-style: none; /* Hides the default triangle in most browsers */
  display: flex;
  justify-content: space-between;
  align-items: center;
  outline: none;
}

/* Hiding the triangle in Safari browser */
summary::-webkit-details-marker {
  display: none;
}

/* Custom plus symbol */
summary::after {
  content: "+";
  color: var(--accent-green);
  font-size: 1.8rem;
  font-weight: 300;
  transition: transform 0.3s ease;
}

/* Style when FAQ is open */
details[open] {
  border-left: 5px solid var(--accent-green);
}

details[open] summary::after {
  transform: rotate(45deg); /* Plus becomes X */
}

/* Content that opens */
.faq-content {
  padding: 0 2rem 1.5rem;
  color: var(--text-main);
  line-height: 1.7;
  /* Smooth appearance animation */
  animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 9. FOOTER */
footer {
  background-color: var(--primary-dark);
  color: white;
  padding: 40px 0;
  margin-top: 60px;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

footer p {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.9;
}

footer div a {
  color: var(--accent-green);
  text-decoration: none;
  margin-left: 20px;
  font-weight: 500;
  transition: 0.3s;
}

footer div a:hover {
  color: white;
  text-decoration: underline;
}

/* 10. MEDIA QUERIES */
@media (max-width: 992px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-image-container {
    order: -1; /* Image goes above text on mobile */
  }

  .hero h1 {
    font-size: 2.5rem;
  }
}

@media (max-width: 600px) {
  .navbar-flex {
    flex-direction: column;
    height: auto;
    padding: 1.5rem;
    gap: 1rem;
  }

  .nav-links {
    gap: 1.2rem;
  }

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

    footer div a {
      margin: 0 10px;
    }
  }
}