/* ===================================
           RESET & BASE VARIABLES
           =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4a90e2;
  --primary-dark: #357abd;
  --secondary: #e94560;
  --dark: #1a1a2e;
  --dark-light: #16213e;
  --light: #f0f2f5;
  --white: #ffffff;
  --gray: #666;
  --shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--light);
  color: var(--dark);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===================================
           FLUID TYPOGRAPHY (Day 46)
           =================================== */
html {
  font-size: 100%;
}

body {
  font-size: clamp(1rem, 1rem + 0.25vw, 1.125rem);
}

h1 {
  font-size: clamp(2rem, 3rem + 2vw, 3.5rem);
  margin-bottom: 0.5rem;
}

h2 {
  font-size: clamp(1.5rem, 1.75rem + 1vw, 2rem);
  margin-bottom: 1rem;
  text-align: center;
}

h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: var(--primary);
  margin: 0.5rem auto 0;
  border-radius: 3px;
}

h3 {
  font-size: clamp(1.125rem, 1.125rem + 0.5vw, 1.25rem);
  margin-bottom: 0.5rem;
}

/* ===================================
           BUTTONS (Touch-friendly)
           =================================== */
.btn {
  display: inline-block;
  padding: 12px 24px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-size: 1rem;
  text-align: center;
}

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

/* Hover only on mouse devices */
@media (hover: hover) {
  .btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
  }
}

/* Tap feedback (all devices) */
.btn-primary:active {
  transform: translateY(0);
  background-color: var(--primary-dark);
}

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

@media (hover: hover) {
  .btn-outline:hover {
    background-color: var(--white);
    color: var(--dark);
  }
}

.btn-outline:active {
  transform: scale(0.98);
}

/* ===================================
           HEADER & NAVIGATION (Mobile-First)
           =================================== */
.header {
  background-color: var(--dark);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary);
  text-decoration: none;
}

/* Hamburger menu (Day 44) */
#menu-toggle {
  display: none;
}

.hamburger {
  font-size: 1.75rem;
  cursor: pointer;
  user-select: none;
}

.nav-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--dark);
  flex-direction: column;
  list-style: none;
  padding: 1rem;
  gap: 0.5rem;
}

#menu-toggle:checked ~ .nav-menu {
  display: flex;
}

.nav-menu a {
  color: var(--white);
  text-decoration: none;
  padding: 12px 16px;
  display: block;
  border-radius: 8px;
  transition: var(--transition);
  min-height: 44px;
}

@media (hover: hover) {
  .nav-menu a:hover {
    background-color: var(--primary);
  }
}

.nav-menu a:active {
  background-color: var(--primary-dark);
  transform: scale(0.98);
}

/* Desktop navigation */
@media (min-width: 768px) {
  .hamburger {
    display: none;
  }

  .nav-menu {
    display: flex;
    position: static;
    flex-direction: row;
    padding: 0;
    gap: 2rem;
  }

  .nav-menu a {
    padding: 0;
    background-color: transparent;
  }

  .nav-menu a:hover {
    background-color: transparent;
    color: var(--primary);
    transform: none;
  }
}

/* ===================================
           HERO SECTION (Centering)
           =================================== */
.hero {
  background: linear-gradient(135deg, var(--dark), var(--dark-light));
  color: var(--white);
  min-height: 80vh;
  display: flex;
  align-items: center;
  text-align: center;
}

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

.hero p {
  max-width: 600px;
  margin: 1rem auto 2rem;
  opacity: 0.9;
}

.button-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================
           SKILLS SECTION (Flexbox wrap)
           =================================== */
.skills {
  padding: 4rem 0;
  background-color: var(--white);
}

.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.skill-card {
  background-color: var(--light);
  padding: 1.5rem;
  border-radius: 1rem;
  text-align: center;
  transition: var(--transition);
}

@media (hover: hover) {
  .skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
  }
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
  .skills-grid {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .skill-card {
    flex: 1 1 calc(25% - 1.5rem);
    min-width: 180px;
  }
}

/* ===================================
           PROJECTS SECTION (CSS Grid)
           =================================== */
.projects {
  padding: 4rem 0;
  background-color: var(--light);
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.project-card {
  background-color: var(--white);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

@media (hover: hover) {
  .project-card:hover {
    transform: translateY(-5px);
  }
}

.project-card:active {
  transform: scale(0.99);
}

.project-img {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.project-info {
  padding: 1.5rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.tag {
  background-color: var(--light);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
}

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

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

/* ===================================
           CONTACT SECTION (Form with focus states)
           =================================== */
.contact {
  padding: 4rem 0;
  background-color: var(--white);
}

.contact-form {
  max-width: 600px;
  margin: 2rem auto 0;
  background-color: var(--light);
  padding: 1.5rem;
  border-radius: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
  min-height: 44px;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

.form-group input:active,
.form-group textarea:active {
  border-color: var(--primary);
}

/* ===================================
           FOOTER
           =================================== */
.footer {
  background-color: var(--dark);
  color: var(--white);
  text-align: center;
  padding: 2rem 0;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.social-links a {
  color: var(--white);
  text-decoration: none;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

@media (hover: hover) {
  .social-links a:hover {
    color: var(--primary);
  }
}

.social-links a:active {
  transform: scale(0.95);
}

/* ===================================
           PRINT STYLES (Day 49)
           =================================== */
@media print {
  .header,
  .hero .button-group,
  .contact-form,
  .footer,
  .hamburger {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
    background: white;
    color: black;
  }

  .hero .highlight {
    color: black;
  }

  .skills,
  .projects,
  .contact {
    padding: 2rem 0;
    background: white;
  }

  .skill-card,
  .project-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 10pt;
  }
}