/* --- Variables and Global Styles --- */

:root {
  /* True Neutral Purple (Eggplant/Byzantium) Color Palette */
  --primary-dark: #301934; /* A deep, balanced eggplant/dark purple */
  --secondary-dark: #49264f; /* A slightly lighter shade of the main dark purple */
  --accent: #800080; /* The classic, true mid-range purple */
  --accent-light: #bb55d4; /* A balanced, slightly brighter medium orchid */
  --text-light: #f8fafc; /* slate-50 (White/Light text) */
  --text-muted: #d8bfd8; /* thistle (A pale, true purple-gray for muted text) */
  --main-header: rgba(
    48,
    25,
    52,
    0.95
  ); /* bg-primary-dark/95 (Semi-transparent header) */

  /* Layout */
  --max-width: 1280px;
  --section-padding: 80px 0;
}

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

body {
  background-color: var(--primary-dark);
  color: var(--text-light);
  font-family: "Inter", sans-serif;
  scroll-behavior: smooth;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s, background-color 0.3s, transform 0.3s;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--secondary-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-light);
}

/* Icons */
.icon-projects {
  width: 1.25rem;
  height: 1.25rem;
} /* w-5 h-5 */
.icon-md {
  width: 1.5rem;
  height: 1.5rem;
} /* w-6 h-6 */
.icon-lg {
  width: 2.5rem;
  height: 2.5rem;
} /* w-10 h-10 */

/* --- Layout and Structure --- */

.main-content-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem; /* px-4 */
}

/* Responsive Padding for Main Content */
@media (min-width: 640px) {
  /* sm */
  .main-content-wrapper {
    padding: 0 1.5rem; /* sm:px-6 */
  }
}

@media (min-width: 1024px) {
  /* lg */
  .main-content-wrapper {
    padding: 0 2rem; /* lg:px-8 */
  }
}

.section-padding {
  padding: var(--section-padding);
}

.section-divider {
  border-top: 1px solid var(--secondary-dark);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem; /* mb-3 */
  text-align: center;
}

.section-intro {
  font-size: 1.125rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 48rem; /* max-w-2xl */
  margin: 0 auto 4rem; /* mx-auto mb-16 */
}

/* --- Header and Navigation --- */

.main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--main-header);
  backdrop-filter: blur(8px); /* backdrop-blur-sm */
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1); /* shadow-lg */
}

.header-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1rem; /* py-4 px-4 */
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap; /* Added for responsive wrapping */
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.logo:hover {
  color: var(--accent-light);
}

.main-nav {
  display: none; /* hidden by default */
  gap: 2rem; /* space-x-8 */
  font-weight: 500;
}

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

.mobile-menu-btn {
  border: none;
  background: none;
  color: var(--text-light);
  cursor: pointer;
}

.mobile-menu-btn .icon-menu {
  width: 1.5rem;
  height: 1.5rem;
}

#mobile-menu {
  display: none;
  position: fixed;
  top: 55px;
  right: 15px;
  border-radius: 10px;
  text-align: center;
  background-color: #8635946b;
}

#mobile-menu li {
  list-style: none;
  padding: 10px;
  margin: 10px;
  background-color: var(--primary-dark);
  border-radius: 10px;
}

#mobile-menu li a {
  color: var(--text-light) !important;
}

#mobile-menu li:hover {
  background-color: var(--accent);
}

#mobile-menu.open {
  display: initial !important;
}

/* Desktop Navigation */
@media (min-width: 640px) {
  /* sm */
  .main-nav {
    display: flex; /* sm:flex */
  }
  .mobile-menu-btn {
    display: none; /* sm:hidden */
  }
  .header-content {
    padding: 1rem 1.5rem; /* sm:px-6 */
  }
}
@media (min-width: 1024px) {
  /* lg */
  .header-content {
    padding: 1rem 2rem; /* lg:px-8 */
  }
}

/* NEW: Domain Selector Styles */
.domain-selector {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  width: 100%;
  justify-content: center;
  order: 3; /* Push to the bottom on mobile */
  background-color: var(--secondary-dark);
  padding: 0.5rem;
  border-radius: 0.5rem;
}

.domain-btn {
  flex-grow: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 0.375rem;
  transition: all 0.2s ease-in-out;
}

.domain-btn:hover {
  color: var(--text-light);
  background-color: #5d3564;
}

.domain-btn.active {
  background-color: var(--accent);
  color: var(--text-light);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

/* Adjust layout on larger screens */
@media (min-width: 640px) {
  /* sm */
  .header-content {
    flex-wrap: nowrap;
  }
  .domain-selector {
    width: auto;
    justify-content: flex-start;
    order: 2; /* Position in the middle on desktop */
    margin-top: 0;
    padding: 0.25rem;
    background-color: var(--primary-dark);
    border: 1px solid var(--secondary-dark);
  }
  .main-nav {
    order: 3;
  }
  .logo {
    order: 1;
  }
  .domain-btn {
    flex-grow: 0;
  }
}

/* --- about Section --- */

.about-section {
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding-top: 6rem; /* pt-24 */
  padding-bottom: 3rem; /* pb-12 */
}

.about-text-container {
  max-width: 48rem; /* max-w-3xl */
}

.about-title {
  font-size: 3rem; /* text-5xl */
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.05em; /* tracking-tighter */
}

.greeting {
  display: block;
  color: var(--text-muted);
  font-size: 1.5rem; /* text-3xl */
  margin-bottom: 0.5rem; /* mb-2 */
  font-weight: 400;
}

.name-gradient {
  display: block;
  background: linear-gradient(
    to right,
    var(--accent),
    #dca5fc
  ); /* to-indigo-300 */
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 3.5rem; /* text-7xl */
}

@media (min-width: 640px) {
  /* sm */
  .about-title {
    font-size: 4.5rem; /* sm:text-7xl */
  }
  .greeting {
    font-size: 2.25rem; /* sm:text-4xl */
  }
  .name-gradient {
    font-size: 4.5rem; /* sm:text-7xl */
  }
}

@media (min-width: 1024px) {
  /* lg */
  .about-title {
    font-size: 6rem; /* lg:text-8xl */
  }
  .name-gradient {
    font-size: 6rem; /* lg:text-8rem */
  }
}

.about-subtitle {
  margin-top: 1rem; /* mt-4 */
  font-size: 1.5rem; /* text-2xl */
  font-weight: 500;
  color: var(--text-light);
}

@media (min-width: 640px) {
  /* sm */
  .about-subtitle {
    font-size: 1.875rem; /* sm:text-3xl */
  }
}

.accent-text-bold {
  color: var(--accent);
  font-weight: 600;
}

.about-description {
  margin-top: 1.5rem; /* mt-6 */
  font-size: 1.125rem; /* text-lg */
  color: var(--text-muted);
  max-width: 36rem; /* max-w-xl */
}

/* CTA and Socials Group */
.about-cta-group {
  margin-top: 2.5rem; /* mt-10 */
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem; /* gap-4 */
}

@media (min-width: 640px) {
  /* sm */
  .about-cta-group {
    flex-direction: row;
    align-items: center;
  }
}

.cta-button {
  padding: 0.75rem 1.5rem; /* px-6 py-3 */
  font-weight: 600;
  border-radius: 0.5rem; /* rounded-lg */
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -4px rgba(0, 0, 0, 0.1); /* shadow-xl */
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); /* transition-all */
}

.primary-cta {
  background-color: var(--accent);
  color: var(--text-light);
}

.primary-cta:hover {
  background-color: var(--accent-light); /* hover:bg-indigo-500 */
  transform: scale(1.02); /* hover:scale-[1.02] */
}

.primary-cta:active {
  transform: scale(1); /* active:scale-100 */
}

.secondary-cta {
  color: var(--accent);
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem; /* gap-2 */
}

.secondary-cta:hover {
  background-color: var(--secondary-dark);
}

.social-icons {
  display: flex;
  gap: 1rem; /* space-x-4 */
  margin-top: 1rem; /* mt-4 */
}

@media (min-width: 640px) {
  /* sm */
  .social-icons {
    margin-left: 1rem; /* sm:ml-4 */
    margin-top: 0; /* sm:mt-0 */
  }
}

.social-icon {
  color: var(--text-muted);
}

.social-icon:hover {
  color: var(--accent);
}

/* --- Skills Section --- */

/* Apply grid rules to the active content block inside the wrapper */
.skills-grid > .domain-content.domain-active {
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* grid-cols-2 */
  gap: 2rem; /* gap-8 */
}

@media (min-width: 640px) {
  /* sm */
  .skills-grid > .domain-content.domain-active {
    grid-template-columns: repeat(3, 1fr); /* sm:grid-cols-3 */
  }
}

@media (min-width: 1024px) {
  /* lg */
  .skills-grid > .domain-content.domain-active {
    grid-template-columns: repeat(6, 1fr); /* lg:grid-cols-6 */
  }
}

.skill-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem; /* p-6 */
  background-color: var(--secondary-dark);
  border-radius: 0.75rem; /* rounded-xl */
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1); /* shadow-lg */
  transition: all 0.3s ease-in-out;
}

.skill-card:hover {
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2),
    0 8px 10px -6px rgba(0, 0, 0, 0.2); /* hover:shadow-2xl */
  transform: translateY(-0.25rem); /* hover:-translate-y-1 */
}

.skill-icon {
  width: 2.5rem; /* w-10 */
  height: 2.5rem; /* h-10 */
  color: var(--accent);
  margin-bottom: 0.75rem; /* mb-3 */
}

.skill-name {
  color: var(--text-light);
  font-weight: 600;
}

/* --- Projects Section --- */

.project-intro-width {
  max-width: 56rem; /* max-w-3xl */
}

/* Apply grid rules to the active content block inside the wrapper */
.projects-grid > .domain-content.domain-active {
  display: grid;
  gap: 2rem; /* gap-8 */
  grid-template-columns: 1fr; /* Default to single column */
}

@media (min-width: 768px) {
  /* md */
  .projects-grid > .domain-content.domain-active {
    grid-template-columns: repeat(2, 1fr); /* md:grid-cols-2 */
  }
}

@media (min-width: 1024px) {
  /* lg */
  .projects-grid > .domain-content.domain-active {
    grid-template-columns: repeat(3, 1fr); /* lg:grid-cols-3 */
  }
}

.project-card {
  background-color: var(--secondary-dark);
  padding: 1.5rem; /* p-6 */
  border-radius: 0.75rem; /* rounded-xl */
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1); /* shadow-lg */
  border: 1px solid transparent;
  transition: all 0.3s ease-in-out;
}

.project-card:hover {
  border-color: var(--accent);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: top;
  margin-bottom: 1rem; /* mb-4 */
}

.project-title {
  font-size: 1.25rem; /* text-xl */
  font-weight: 700;
  color: var(--text-light);
}

.project-links {
  display: flex;
  gap: 0.75rem; /* space-x-3 */
}

.project-link {
  color: var(--text-muted);
}

.project-link:hover {
  color: var(--accent);
}

.project-description {
  color: var(--text-muted);
  margin-bottom: 1rem; /* mb-4 */
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem; /* gap-2 */
  font-size: 0.875rem; /* text-sm */
}

.tag {
  background-color: rgba(53, 3, 53, 0.2);
  color: var(--accent-light);
  padding: 0.25rem 0.75rem; /* px-3 py-1 */
  border-radius: 9999px; /* rounded-full */
  font-weight: 500;
}

/* --- Contact Section --- */

.contact-section {
  text-align: center;
}

.contact-section .section-title {
  margin-bottom: 1rem; /* mb-4 */
}

.contact-intro {
  font-size: 1.25rem; /* text-xl */
  color: var(--text-muted);
  max-width: 42rem; /* max-w-2xl */
  margin: 0 auto 2rem; /* mx-auto mb-8 */
}

.final-cta {
  display: inline-flex;
  align-items: center;
  padding: 1rem 2rem; /* px-8 py-4 */
  font-size: 1.125rem; /* text-lg */
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.1); /* shadow-2xl */
}

.icon-mail {
  margin-left: 0.75rem; /* ml-3 */
  transition: transform 0.3s ease-in-out;
}

.final-cta:hover .icon-mail {
  transform: rotate(6deg); /* group-hover:rotate-6 */
}

/* --- Footer --- */

.main-footer {
  margin-top: 4rem; /* mt-16 */
  padding: 2rem 0; /* py-8 */
  border-top: 1px solid var(--secondary-dark);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  text-align: center;
}

.copyright {
  color: var(--text-muted);
  font-size: 0.875rem; /* text-sm */
}

.footer-social-links {
  display: flex;
  justify-content: center;
  gap: 1rem; /* space-x-4 */
  margin-top: 1rem; /* mt-4 */
}

.footer-social-icon {
  color: var(--text-muted);
}

.footer-social-icon:hover {
  color: var(--accent);
}

/* Responsive Footer Layout */
@media (min-width: 640px) {
  /* sm */
  .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
  }
  .footer-social-links {
    justify-content: flex-start; /* sm:justify-start */
    margin-top: 0; /* sm:mt-0 */
  }
}
@media (min-width: 1024px) {
  /* lg */
  .footer-content {
    padding: 0 2rem;
  }
}

/* NEW: Multi-Domain Content Visibility 
   Hides content wrappers that do not match the active domain. */
.domain-content:not(.domain-active) {
  display: none;
}

.lang-btn.active {
  display: none;
}

.lang-btn {
  border: none;
  background: none;
  font-size: 1.2em;
  cursor: pointer;
}

.book-hover {
  position: relative;
  cursor: context-menu;
}

.book-hover ul {
  display: none;
  width: 45vw;
  text-align: center;
}

.book-hover:hover ul {
  display: block;
  position: absolute;
  right: -5px;
  bottom: 75px;
  color: var(--text-muted);
  padding: 5px;
}

@media (orientation: portrait) {
  .book-hover ul {
    width: 45vw;
  }

  .book-hover:hover ul {
    left: initial;
  }
}

@media (min-width: 640px) {
  /* sm */
  .book-hover ul {
    width: 30vw;
  }
}
@media (min-width: 1024px) {
  /* lg */
  .book-hover ul {
    width: 15vw;
  }
}

.book-hover ul li {
  display: inline-block;
  margin-top: 10px;
}