/* ==========================================================================
   PROFESSOR MIKE PORTFOLIO WEBSITE - MAIN STYLESHEET
   Vanilla CSS3 - Zero Frameworks
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS CUSTOM PROPERTIES / DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Sophisticated Academic & Therapeutic Theme */
  --color-primary-900: #0f172a;  /* Deep Navy / Charcoal Header & Primary Text */
  --color-primary-800: #1e293b;  /* Slate Charcoal Body Headers */
  --color-primary-700: #334155;  /* Muted Slate Text */
  --color-primary-100: #f1f5f9;  /* Light Gray Neutral Background */
  --color-primary-50:  #f8fafc;  /* Warm Neutral Soft Background */

  /* Accent Colors */
  --color-teal-700:    #0f766e;  /* Deep Professional Teal Accent */
  --color-teal-600:    #0d9488;  /* Vibrant Teal Link & Button Color */
  --color-teal-500:    #14b8a6;  /* Soft Teal Highlight */
  --color-teal-100:    #ccfbf1;  /* Light Teal Badge Background */
  --color-teal-50:     #f0fdf4;  /* Ultra Light Teal Accent */

  /* Gold / Warm Complementary Accent */
  --color-gold-600:    #d97706;  /* Subtle Gold/Amber Accent */
  --color-gold-100:    #fef3c7;  /* Soft Gold Accent Background */

  /* Neutral Surface & Borders */
  --color-surface-white: #ffffff;
  --color-border-subtle: #e2e8f0;
  --color-border-medium: #cbd5e1;

  /* Text Colors */
  --color-text-primary:   #1e293b;
  --color-text-secondary: #475569;
  --color-text-muted:     #64748b;
  --color-text-on-dark:   #ffffff;

  /* State & Feedback Colors */
  --color-success:  #10b981;
  --color-error:    #ef4444;
  --color-focus:    #2563eb;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, Cambria, 'Times New Roman', serif;
  --font-sans:  'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --font-size-xs:   0.75rem;    /* 12px */
  --font-size-sm:   0.875rem;   /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg:   1.125rem;   /* 18px */
  --font-size-xl:   1.25rem;    /* 20px */
  --font-size-2xl:  1.5rem;     /* 24px */
  --font-size-3xl:  1.875rem;   /* 30px */
  --font-size-4xl:  2.25rem;    /* 36px */
  --font-size-5xl:  3rem;       /* 48px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout Widths */
  --container-max-width: 1200px;
  --container-narrow-width: 800px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Elevation / Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 20px 30px rgba(15, 23, 42, 0.12);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,500;0,600;0,700;1,400&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

/* --------------------------------------------------------------------------
   2. CSS RESET & NORMALIZATION
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-primary-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-teal-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-teal-600);
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. BASE TYPOGRAPHY & GLOBAL ELEMENTS
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--color-primary-900);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

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

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

/* --------------------------------------------------------------------------
   4. ACCESSIBILITY & UTILITY CLASSES
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary-900);
  color: var(--color-surface-white);
  padding: 0.75rem 1.25rem;
  z-index: 9999;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  transition: top var(--transition-fast);
  box-shadow: var(--shadow-lg);
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-teal-500);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-narrow {
  max-width: var(--container-narrow-width);
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-12) auto;
}

.section-subtitle {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-teal-700);
  margin-bottom: var(--space-2);
  display: block;
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-description {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  background-color: var(--color-teal-100);
  color: var(--color-teal-700);
}

.badge-gold {
  background-color: var(--color-gold-100);
  color: var(--color-gold-600);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: 1;
  transition: all var(--transition-normal);
  text-decoration: none;
  border: 2px solid transparent;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--color-teal-700);
  color: var(--color-surface-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-teal-600);
  color: var(--color-surface-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-900);
  border-color: var(--color-primary-900);
}

.btn-secondary:hover {
  background-color: var(--color-primary-900);
  color: var(--color-surface-white);
  transform: translateY(-2px);
}

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

.btn-outline-white:hover {
  background-color: var(--color-surface-white);
  color: var(--color-primary-900);
}

.editable-note {
  background-color: #fefce8;
  border-left: 4px solid #eab308;
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-6);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--font-size-xs);
  color: #854d0e;
}

/* --------------------------------------------------------------------------
   5. HEADER & NAVIGATION COMPONENT
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-primary-900);
}

.brand-logo svg {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  color: var(--color-primary-900);
}

.brand-subtitle {
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  color: var(--color-teal-700);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-family: var(--font-sans);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-teal-700);
  transition: width var(--transition-normal);
}

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

.nav-link.active {
  color: var(--color-teal-700);
  font-weight: var(--font-weight-semibold);
}

.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-surface-white);
  color: var(--color-primary-900);
}

.mobile-nav-toggle span {
  width: 22px;
  height: 2px;
  background-color: var(--color-primary-900);
  transition: all var(--transition-normal);
  position: relative;
}

.mobile-nav-toggle span::before,
.mobile-nav-toggle span::after {
  content: '';
  position: absolute;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary-900);
  transition: all var(--transition-normal);
  left: 0;
}

.mobile-nav-toggle span::before {
  top: -7px;
}

.mobile-nav-toggle span::after {
  top: 7px;
}

.mobile-nav-toggle[aria-expanded="true"] span {
  background-color: transparent;
}

.mobile-nav-toggle[aria-expanded="true"] span::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-nav-toggle[aria-expanded="true"] span::after {
  transform: rotate(-45deg);
  top: 0;
}

/* --------------------------------------------------------------------------
   6. HERO COMPONENT
   -------------------------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
  padding-top: var(--space-16);
  padding-bottom: var(--space-20);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-content {
  max-width: 640px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background-color: var(--color-teal-100);
  color: var(--color-teal-700);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-6);
}

.hero-title {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  line-height: 1.15;
  color: var(--color-primary-900);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-teal-700);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-6);
  font-family: var(--font-sans);
}

.hero-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  border-left: 3px solid var(--color-teal-600);
  padding-left: var(--space-4);
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 8px solid var(--color-surface-white);
  max-width: 440px;
  width: 100%;
}

.hero-image {
  width: 100%;
  height: auto;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.hero-badge-floating {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background-color: var(--color-surface-white);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.hero-badge-number {
  font-family: var(--font-serif);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-teal-700);
  line-height: 1;
}

.hero-badge-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
}

/* --------------------------------------------------------------------------
   7. LAYOUT GRID & SECTION LAYOUTS
   -------------------------------------------------------------------------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background-color: var(--color-surface-white);
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-teal-500);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--color-teal-100);
  color: var(--color-teal-700);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  font-size: 1.5rem;
}

.feature-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

.feature-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--color-teal-700);
}

.feature-link:hover {
  color: var(--color-teal-600);
  gap: 0.625rem;
}

/* --------------------------------------------------------------------------
   8. CARDS & CONTAINER COMPONENTS
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-surface-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
}

.card-header {
  margin-bottom: var(--space-4);
}

.quick-facts-banner {
  background-color: var(--color-primary-900);
  color: var(--color-surface-white);
  padding: var(--space-12) 0;
  border-radius: var(--radius-xl);
  margin-top: var(--space-12);
}

.quick-facts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  text-align: center;
}

.fact-item {
  padding: 0 var(--space-4);
}

.fact-item:not(:last-child) {
  border-right: 1px solid rgba(255, 255, 255, 0.15);
}

.fact-number {
  font-family: var(--font-serif);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-teal-500);
  margin-bottom: var(--space-1);
}

.fact-label {
  font-size: var(--font-size-sm);
  color: var(--color-primary-100);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.testimonial-card {
  background-color: var(--color-surface-white);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  position: relative;
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  font-style: italic;
  color: var(--color-text-primary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-4);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-teal-100);
  color: var(--color-teal-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
}

.testimonial-meta h4 {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  margin-bottom: 0;
}

.testimonial-meta p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   9. TIMELINE COMPONENT (EXPERIENCE)
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-6) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  width: 3px;
  background-color: var(--color-border-medium);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: var(--space-12);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  top: 0;
  left: 8px;
  width: 27px;
  height: 27px;
  border-radius: var(--radius-full);
  background-color: var(--color-surface-white);
  border: 4px solid var(--color-teal-700);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.15);
}

.timeline-content {
  background-color: var(--color-surface-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.timeline-role {
  font-size: var(--font-size-xl);
  color: var(--color-primary-900);
  margin-bottom: var(--space-1);
}

.timeline-org {
  font-size: var(--font-size-base);
  color: var(--color-teal-700);
  font-weight: var(--font-weight-medium);
}

.timeline-period {
  background-color: var(--color-primary-100);
  color: var(--color-primary-800);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.timeline-body {
  color: var(--color-text-secondary);
}

.timeline-body ul {
  list-style: disc;
  padding-left: var(--space-6);
  margin-top: var(--space-4);
}

.timeline-body li {
  margin-bottom: var(--space-2);
}

/* --------------------------------------------------------------------------
   10. ACCORDION COMPONENT (FAQ)
   -------------------------------------------------------------------------- */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  background-color: var(--color-surface-white);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  width: 100%;
  padding: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-900);
  background-color: var(--color-surface-white);
  transition: background-color var(--transition-fast);
}

.accordion-header:hover {
  background-color: var(--color-primary-50);
}

.accordion-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-normal);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-in-out, padding var(--transition-normal) ease-in-out;
  padding: 0 var(--space-6);
  color: var(--color-text-secondary);
}

.accordion-item.active .accordion-content {
  padding: 0 var(--space-6) var(--space-6) var(--space-6);
}

/* --------------------------------------------------------------------------
   11. PUBLICATIONS & RESEARCH COMPONENTS
   -------------------------------------------------------------------------- */
.research-card {
  background-color: var(--color-surface-white);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
}

.research-category {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: var(--font-weight-bold);
  color: var(--color-teal-700);
  margin-bottom: var(--space-2);
}

.research-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
  color: var(--color-primary-900);
}

.research-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   12. FORMS & INTERACTIVE ELEMENTS
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  color: var(--color-primary-900);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-white);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-teal-600);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.2);
}

.form-control.is-invalid {
  border-color: var(--color-error);
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-xs);
  margin-top: var(--space-1);
  display: none;
}

.form-control.is-invalid + .form-error {
  display: block;
}

.privacy-notice-box {
  background-color: var(--color-primary-50);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.privacy-notice-box svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-teal-700);
  margin-top: 2px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-teal-100);
  color: var(--color-teal-700);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  margin-bottom: 2px;
}

.contact-info-text p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.form-status {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  display: none;
  font-size: var(--font-size-sm);
}

.form-status.success {
  display: block;
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form-status.error {
  display: block;
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* --------------------------------------------------------------------------
   13. FOOTER COMPONENT
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary-900);
  color: var(--color-surface-white);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  color: var(--color-primary-100);
  opacity: 0.8;
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-surface-white);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  color: var(--color-primary-100);
  opacity: 0.8;
  font-size: var(--font-size-sm);
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-teal-500);
}

.social-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.social-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-surface-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-icon-btn:hover {
  background-color: var(--color-teal-600);
  color: var(--color-surface-white);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.6);
}

/* --------------------------------------------------------------------------
   14. BACK-TO-TOP BUTTON & FLOATING UI
   -------------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-teal-700);
  color: var(--color-surface-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 900;
  border: none;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-teal-600);
  transform: translateY(-4px);
}

/* --------------------------------------------------------------------------
   15. SCROLL REVEAL & ANIMATIONS
   -------------------------------------------------------------------------- */
.reveal-on-scroll {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

html.js-enabled .reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px);
}

html.js-enabled .reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   16. MEDIA QUERIES & RESPONSIVE BREAKPOINTS
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-quote {
    text-align: left;
  }

  .hero-actions {
    justify-content: center;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-surface-white);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-8);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-normal) ease-in-out;
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .nav-link {
    font-size: var(--font-size-lg);
    width: 100%;
    padding: var(--space-2) 0;
  }

  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }

  .quick-facts-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .fact-item:nth-child(2) {
    border-right: none;
  }

  .fact-item {
    border-right: none;
  }

  .timeline::before {
    left: 12px;
  }

  .timeline-item {
    padding-left: 40px;
  }

  .timeline-marker {
    left: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .hero-badge-floating {
    position: relative;
    bottom: auto;
    left: auto;
    margin-top: var(--space-6);
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .quick-facts-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}

/* --------------------------------------------------------------------------
   17. PREFERS REDUCED MOTION & PRINT STYLES
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }
}