/* style.css - Clean, Minimalist, Responsive Design for Mishel Johns */

/* Custom properties */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Color Palette - White/Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --text-primary: #111827; /* slate-900 */
  --text-secondary: #4b5563; /* slate-600 */
  --text-muted: #6b7280; /* slate-400 */
  --accent: #2563eb; /* Royal Blue */
  --accent-light: rgba(37, 99, 235, 0.08);
  --accent-hover: #1d4ed8;
  --border-color: #e5e7eb; /* slate-200 */
  --border-light: #f3f4f6; /* slate-100 */
  
  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
  
  /* Layout & Spacing */
  --max-width: 1040px;
  --header-height: 72px;
  --border-radius-lg: 16px;
  --border-radius-md: 10px;
  --border-radius-sm: 6px;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 40px;
  height: 3px;
  background-color: var(--accent);
  border-radius: 2px;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1.25rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

ul {
  list-style: none;
}

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

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

.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--border-light);
}

.section:nth-of-type(even) {
  background-color: var(--bg-secondary);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.5);
  z-index: 100;
  transition: all 0.3s ease;
}

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

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.2s ease;
}

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

/* Mobile Menu Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-primary);
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Hero Section */
.hero {
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 4rem;
  align-items: center;
}

.hero-image-container {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-image {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-primary);
  box-shadow: var(--shadow-xl);
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.03em;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.hero-emphasis {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--border-radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.social-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.social-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Research Section */
.research-intro {
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 800px;
  margin-bottom: 2rem;
}

.interests-intro {
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 800px;
}

.research-list {
  list-style: none;
  margin: 1.5rem 0 2.5rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 2rem;
}

.research-list li {
  position: relative;
  padding-left: 1.75rem;
  font-size: 0.95rem;
}

.research-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--accent);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: 550;
  font-size: 0.95rem;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(37, 99, 235, 0.3);
}

.interests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.interest-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-lg);
  padding: 2rem 1.5rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

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

.interest-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-md);
  background-color: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.interest-icon-wrapper svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.interest-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.interest-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 2rem;
  margin-top: 1rem;
}

.project-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(37, 99, 235, 0.2);
}

.project-image-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
}

.project-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover img {
  transform: scale(1.03);
}

.project-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.project-content h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.project-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-link {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--accent);
  align-self: flex-start;
}

.project-link svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.2s ease;
}

.project-card:hover .project-link svg {
  transform: translateX(3px);
}

/* Other Projects Section */
.other-projects {
  margin-top: 4.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 4rem;
}

.other-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.other-project-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 1rem;
  transition: all 0.2s ease;
}

.other-project-card:hover {
  border-color: var(--border-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.other-icon {
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.other-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.other-details h3 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--text-primary);
}

.other-details p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Contact Section */
.contact-section .social-links {
  margin-top: 0;
}

/* Footer */
footer {
  padding: 3rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

/* Modal Dialog */
dialog {
  border: none;
  border-radius: var(--border-radius-lg);
  padding: 0;
  max-width: 780px;
  width: 90%;
  max-height: 90vh;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

dialog::backdrop {
  background-color: rgba(17, 24, 39, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* Dialog content structure */
.dialog-header {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10;
}

.dialog-close-btn {
  background: rgba(17, 24, 39, 0.6);
  color: white;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 300;
  transition: background-color 0.2s;
  box-shadow: var(--shadow-sm);
}

.dialog-close-btn:hover {
  background-color: rgba(17, 24, 39, 0.9);
}

.dialog-image-wrapper {
  width: 100%;
  background-color: #000;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.dialog-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.dialog-body {
  padding: 2rem;
  background-color: var(--bg-primary);
}

.dialog-body h2 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.dialog-body h2::after {
  display: none;
}

.dialog-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.dialog-footer {
  display: flex;
  justify-content: flex-end;
}

/* Fade in effects (Scroll Animations) */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive styles */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }
  
  .hero-image-container {
    order: -1;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .research-list {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  .hero-content h1 { font-size: 2.5rem; }
  
  .section {
    padding: 4rem 0;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: 0;
    overflow: hidden;
    flex-direction: column;
    background-color: var(--bg-primary);
    padding: 0 1.5rem;
    gap: 0;
    transition: all 0.3s ease;
    border-bottom: 1px solid transparent;
  }
  
  .nav-links.open {
    height: calc(100vh - var(--header-height));
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-links a {
    display: block;
    padding: 1rem 0;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border-light);
  }
  
  .nav-links a::after {
    display: none;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}