/* ============================================
   Noah Myers - Personal Website
   Professional, Minimal Design
   Muted Blues / Greys / Black
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors - Muted Professional Palette */
  --color-primary: #2c3e50;      /* Dark blue-grey */
  --color-secondary: #34495e;    /* Slightly lighter blue-grey */
  --color-accent: #5a7a94;       /* Muted steel blue */
  --color-accent-light: #7a9cb8; /* Lighter accent for hovers */
  --color-text: #333333;         /* Near black for body text */
  --color-text-light: #666666;   /* Grey for secondary text */
  --color-text-muted: #888888;   /* Muted grey */
  --color-bg: #ffffff;           /* White background */
  --color-bg-alt: #f8f9fa;       /* Off-white for sections */
  --color-bg-dark: #1a252f;      /* Dark sections */
  --color-border: #e0e0e0;       /* Light grey borders */

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-heading: 'Georgia', 'Times New Roman', serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;

  /* Layout */
  --max-width: 1100px;
  --header-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul {
  list-style: none;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2rem, 4vw, 2.5rem); }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-sm);
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
li,
a {
  overflow-wrap: anywhere;
}

.lead {
  font-size: 1.2rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.bio-secondary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- Layout Containers ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-dark {
  background-color: var(--color-bg-dark);
  color: #ffffff;
}

.section-dark h2,
.section-dark h3 {
  color: #ffffff;
}

/* ---------- Header & Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  backdrop-filter: blur(10px);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--color-primary);
  font-weight: 400;
  letter-spacing: 0.5px;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  margin: 5px 0;
  transition: 0.3s;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-menu a {
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
}

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

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

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

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
    z-index: 1001;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--header-height) + var(--spacing-md)) var(--spacing-md);
    gap: var(--spacing-sm);
    transition: right 0.3s ease;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu a {
    font-size: 1.1rem;
    padding: var(--spacing-xs) 0;
  }
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-secondary) 100%);
  color: #ffffff;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/noah_speaking.jpeg') center center / cover no-repeat;
  opacity: 0.15;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 700px;
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2.1rem, 6vw, 3rem);
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
}

.hero .subtitle {
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.75);
}

.hero-meta span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Compact Hero Variant */
.hero.hero-compact {
  min-height: 45vh;
}

.hero.hero-compact h1 {
  font-size: clamp(1.9rem, 5vw, 2.5rem);
}

.hero.hero-compact .subtitle {
  font-size: clamp(1rem, 2.6vw, 1.15rem);
  margin-bottom: var(--spacing-sm);
}

/* ---------- Profile Sidebar Layout ---------- */
.profile-sidebar-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}

.sidebar {
  text-align: center;
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-md));
}

.sidebar-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--spacing-sm);
  border: 4px solid var(--color-border);
}

.sidebar-name {
  font-size: 1.3rem;
  margin-bottom: 0.25rem;
}

.sidebar-title {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.sidebar-affiliation {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.sidebar-links {
  text-align: left;
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-sm);
}

.sidebar-links li {
  margin-bottom: 0.6rem;
}

.sidebar-links a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text-light);
  font-size: 0.9rem;
  padding: 0.3rem 0;
  transition: color 0.2s ease;
}

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

.sidebar-links svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.main-content {
  padding-top: 0.5rem;
}

.credentials-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-md);
  margin: var(--spacing-md) 0;
  padding: var(--spacing-sm) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.credentials-inline span {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.credentials-inline strong {
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .profile-sidebar-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    margin-bottom: var(--spacing-md);
  }

  .sidebar-image {
    width: 140px;
    height: 140px;
  }

  .sidebar-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1rem;
    text-align: center;
  }

  .sidebar-links li {
    margin-bottom: 0;
  }

  .hero.hero-compact {
    min-height: 40vh;
  }

  .hero.hero-compact h1 {
    font-size: 2rem;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: #ffffff;
}

.btn-outline {
  background-color: transparent;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
  color: #ffffff;
}

.btn-dark {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn-dark:hover {
  background-color: var(--color-secondary);
  color: #ffffff;
}

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-accent:hover {
  background-color: var(--color-accent-light);
  color: #ffffff;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.btn-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-with-icon svg {
  width: 1em;
  height: 1em;
}

/* ---------- Topic Cards ---------- */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.topic-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--spacing-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.topic-card h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
}

.topic-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ---------- News Cards ---------- */
.news-section .news-header {
  margin-bottom: var(--spacing-md);
}

.news-section .news-header h2 {
  margin-bottom: 0.35rem;
}

.news-section .news-subtitle {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.news-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.news-card {
  background-color: var(--color-bg);
  border: 2px solid var(--color-primary);
  box-shadow: 0 14px 28px rgba(26, 37, 47, 0.12);
}

.news-card:hover {
  box-shadow: 0 18px 34px rgba(26, 37, 47, 0.16);
}

.news-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  flex-wrap: wrap;
}

.news-source {
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
}

.news-date {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.news-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

.news-card h3 a {
  color: inherit;
}

.news-summary {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-sm);
}

.news-link {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}

.news-link:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.topic-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-bg-alt);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
  font-size: 1.5rem;
}

/* ---------- Credentials Bar ---------- */
.credentials {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
  text-align: center;
}

.credential-item {
  flex: 0 1 200px;
}

.credential-item .number {
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--color-accent);
  display: block;
  font-family: var(--font-heading);
}

.credential-item .label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ---------- Profile Section ---------- */
.profile-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-lg);
  align-items: start;
}

.profile-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-border);
}

.profile-content h2 {
  margin-bottom: var(--spacing-xs);
}

.profile-title {
  color: var(--color-text-light);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

/* ---------- About Page ---------- */
.family-photo {
  max-width: 520px;
  width: 100%;
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
}

.projects-grid {
  max-width: 820px;
  margin: 0 auto;
}

.topic-card-placeholder {
  border-style: dashed;
  color: var(--color-text-muted);
}

.hero-btns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  max-width: 640px;
  gap: var(--spacing-sm);
}

.hero-btns .btn {
  width: 100%;
}

@media (max-width: 600px) {
  .profile-section {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .profile-image {
    margin: 0 auto var(--spacing-md);
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  .hero {
    min-height: 70vh;
  }

  .hero-meta {
    gap: var(--spacing-sm);
  }

  .hero-btns {
    grid-template-columns: 1fr;
  }

  .page-header {
    padding: calc(var(--header-height) + var(--spacing-md)) 0 var(--spacing-md);
  }
}

/* ---------- CV / Content Sections ---------- */
.cv-section {
  margin-bottom: var(--spacing-lg);
}

.cv-section h2 {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.cv-item {
  margin-bottom: var(--spacing-md);
}

.cv-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.cv-item .meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-xs);
}

.cv-item ul {
  margin-left: var(--spacing-md);
}

.cv-item li {
  list-style: disc;
  margin-bottom: 0.25rem;
  color: var(--color-text-light);
}

.publication {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-md);
  border-left: 3px solid var(--color-accent);
}

.publication h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.publication .pub-meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.publication .pub-meta em {
  color: var(--color-text-light);
}

.publication .pub-description {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.publication .title {
  font-weight: 500;
  color: var(--color-primary);
}

.publication .venue {
  font-style: italic;
  color: var(--color-text-light);
}

.publication .authors {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ---------- Talks Section ---------- */
.talks-list {
  margin-top: var(--spacing-md);
}

.talk-item {
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: var(--spacing-sm);
  background-color: var(--color-bg);
}

.talk-item h4 {
  margin-bottom: 0.25rem;
}

.talk-item .meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.talks-placeholder {
  background-color: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: 6px;
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-text-muted);
}

/* ---------- Social Links ---------- */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.social-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

.social-link svg {
  width: 18px;
  height: 18px;
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-lg) 0;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-copy {
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* ---------- Video Embeds ---------- */
.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  border-radius: 6px;
  background-color: var(--color-bg-alt);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ---------- Download Buttons ---------- */
.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: var(--spacing-sm);
}

.download-info h4 {
  margin-bottom: 0.25rem;
}

.download-info p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0;
}

@media (max-width: 500px) {
  .download-card {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
}

/* ---------- 404 Page ---------- */
.error-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--header-height);
}

.error-page h1 {
  font-size: 6rem;
  color: var(--color-border);
  margin-bottom: 0;
}

.error-page p {
  font-size: 1.2rem;
  color: var(--color-text-light);
}

/* ---------- Page Header ---------- */
.page-header {
  background-color: var(--color-bg-alt);
  padding: calc(var(--header-height) + var(--spacing-lg)) 0 var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: 0.25rem;
}

.page-header .subtitle {
  color: var(--color-text-light);
  font-size: 1.1rem;
  margin: 0;
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

/* ---------- Responsive Adjustments ---------- */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero .subtitle {
    font-size: 1.1rem;
  }

  .credentials {
    gap: var(--spacing-md);
  }

  .credential-item .number {
    font-size: 2rem;
  }
}

/* ---------- Print Styles ---------- */
@media print {
  .header,
  .footer,
  .btn,
  .nav-toggle {
    display: none;
  }

  .page-header {
    padding-top: 0;
  }

  body {
    font-size: 12pt;
  }
}