/* ==========================================================================
   danielacton.com - Modern Design System (Executive Tech Leadership)
   Author: Daniel Acton
   ========================================================================== */

/* Modern Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* CSS Variables & Theme Definitions */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Transition timings */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --max-width: 1140px;
}

/* Dark Theme (Default) */
:root, [data-theme="dark"] {
  --bg-base: #0a0d14;
  --bg-surface: #111726;
  --bg-surface-elevated: #1a2236;
  --bg-surface-hover: #1e293b;
  --bg-glass: rgba(10, 13, 20, 0.82);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);
  
  --accent-primary: #6366f1;
  --accent-secondary: #38bdf8;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #38bdf8 100%);
  --accent-glow: 0 0 24px rgba(99, 102, 241, 0.25);
  
  --badge-bg: rgba(99, 102, 241, 0.12);
  --badge-text: #a5b4fc;
  --badge-border: rgba(99, 102, 241, 0.25);
  
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --card-shadow-hover: 0 12px 30px -4px rgba(0, 0, 0, 0.7);
  --nav-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Light Theme */
[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(248, 250, 252, 0.85);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(79, 70, 229, 0.5);
  
  --accent-primary: #4f46e5;
  --accent-secondary: #0284c7;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #0284c7 100%);
  --accent-glow: 0 0 24px rgba(79, 70, 229, 0.15);
  
  --badge-bg: rgba(79, 70, 229, 0.08);
  --badge-text: #4338ca;
  --badge-border: rgba(79, 70, 229, 0.2);
  
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  --card-shadow-hover: 0 12px 30px -4px rgba(0, 0, 0, 0.1);
  --nav-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand:hover .brand-name {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

.brand-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10b981;
  display: inline-block;
  box-shadow: 0 0 6px #10b981;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
}

.nav-link.active {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-focus);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 5rem 0 4rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-secondary);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  align-self: flex-start;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.credential-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: 0.25rem;
}

.pill {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.pill strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.social-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.social-btn {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

/* Portrait Card */
.portrait-container {
  display: flex;
  justify-content: center;
  position: relative;
}

.portrait-frame {
  position: relative;
  border-radius: var(--radius-xl);
  padding: 8px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.4) 0%, rgba(56, 189, 248, 0.1) 100%);
  box-shadow: var(--card-shadow);
  max-width: 380px;
  width: 100%;
}

.portrait-img {
  width: 100%;
  aspect-ratio: 4 / 3.5;
  object-fit: cover;
  border-radius: calc(var(--radius-xl) - 6px);
  display: block;
}

.portrait-status {
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   Section Headers & Common Blocks
   ========================================================================== */
.section {
  padding: 5rem 0;
}

.section-alt {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: 3rem;
  text-align: left;
}

.section-eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-top: 0.75rem;
}

/* ==========================================================================
   Leadership Pillars / Grid Cards
   ========================================================================== */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--card-shadow);
}

.section-alt .pillar-card {
  background: var(--bg-base);
}

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

.pillar-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.35rem;
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.015em;
}

.pillar-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Executive Bio & Career Narrative
   ========================================================================== */
.bio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: flex-start;
}

.bio-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.bio-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.company-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.company-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ==========================================================================
   Presentations & Speaking Cards
   ========================================================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.filter-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.75rem;
}

.media-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: all var(--transition-normal);
  box-shadow: var(--card-shadow);
}

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

.card-top {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.type-pill {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

.media-title {
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
}

.media-synopsis {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.action-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-primary);
  transition: all var(--transition-fast);
}

.action-link:hover {
  color: var(--accent-secondary);
  transform: translateX(2px);
}

/* ==========================================================================
   Project Showcase Cards
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: all var(--transition-normal);
  box-shadow: var(--card-shadow);
}

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

.project-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.project-role {
  font-size: 0.875rem;
  color: var(--accent-secondary);
  font-weight: 500;
}

.project-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.78125rem;
  font-weight: 500;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.project-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.highlight-item {
  display: flex;
  align-items: baseline;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.highlight-item svg {
  flex-shrink: 0;
  color: #10b981;
  width: 14px;
  height: 14px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  padding: 3.5rem 0 2.5rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-title {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .portrait-container {
    order: -1;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .cards-grid-3 {
    grid-template-columns: 1fr;
  }
  
  .bio-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.25rem 1.5rem;
    flex-direction: column;
    align-items: stretch;
    box-shadow: var(--nav-shadow);
  }
  
  .nav-menu.open {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.15rem;
  }
  
  .section-title {
    font-size: 1.85rem;
  }
}