/* ===========================
   Modern 2026 Web Design
   Jim Hutcherson Website
   =========================== */

/* Import modern variable font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ===========================
   CSS Variables & Theme
   =========================== */

:root {
  /* Modern Color Palette - Tech-forward but human */
  --primary-color: #0F172A;        /* Deep slate for authority */
  --primary-light: #1E293B;
  --secondary-color: #3B82F6;      /* Vibrant blue for trust */
  --secondary-light: #60A5FA;
  --accent-color: #8B5CF6;         /* Purple for innovation */
  --accent-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);

  /* Neutrals */
  --text-dark: #0F172A;
  --text-medium: #475569;
  --text-light: #64748B;
  --bg-light: #FFFFFF;
  --bg-gray: #F8FAFC;
  --bg-dark: #0F172A;
  --border-color: #E2E8F0;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #3B82F6 100%);
  --gradient-mesh: radial-gradient(at 0% 0%, #3B82F6 0px, transparent 50%),
                   radial-gradient(at 100% 100%, #8B5CF6 0px, transparent 50%);

  /* Typography - Modern variable fonts */
  --font-primary: 'Space Grotesk', -apple-system, sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --text-3xl: clamp(2rem, 1.7rem + 1.5vw, 3rem);
  --text-4xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  --text-5xl: clamp(3rem, 2.5rem + 3vw, 5rem);
  --text-6xl: clamp(3.5rem, 3rem + 3.5vw, 6rem);

  /* Spacing - More generous for 2026 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  --spacing-2xl: 8rem;

  /* Shadows - Layered and subtle */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);

  /* Border Radius - Modern rounded corners */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Transitions - Smooth and purposeful */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root.auto-theme {
    --bg-light: #0F172A;
    --bg-gray: #1E293B;
    --text-dark: #F8FAFC;
    --text-medium: #CBD5E1;
    --text-light: #94A3B8;
    --border-color: #334155;
  }
}

[data-theme="dark"] {
  --bg-light: #0F172A;
  --bg-gray: #1E293B;
  --text-dark: #F8FAFC;
  --text-medium: #CBD5E1;
  --text-light: #94A3B8;
  --border-color: #334155;
}

/* ===========================
   Reset & Base Styles
   =========================== */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--bg-light);
  transition: background-color var(--transition), color var(--transition);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-medium);
  line-height: 1.8;
}

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

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

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

/* ===========================
   Layout Components
   =========================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

/* Decorative gradient underline for section titles */
.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  margin: var(--spacing-md) auto 0;
  border-radius: var(--radius-full);
}

/* ===========================
   Navigation - Modern & Minimal
   =========================== */

header {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition);
}

[data-theme="dark"] header {
  background-color: rgba(15, 23, 42, 0.8);
}

header.scrolled {
  box-shadow: var(--shadow-md);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  gap: var(--spacing-md);
}

.logo {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-xs);
  align-items: center;
}

.nav-links a {
  color: var(--text-medium);
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--gradient-primary);
  transition: transform var(--transition);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: translateX(-50%) scaleX(1);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--text-dark);
  padding: var(--spacing-xs);
}

/* Dark mode toggle */
.theme-toggle {
  background: var(--bg-gray);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: var(--spacing-xs);
  cursor: pointer;
  transition: all var(--transition);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--secondary-color);
  color: white;
  transform: rotate(20deg);
}

/* ===========================
   Hero Section - Maximum Impact
   =========================== */

.hero {
  background: var(--gradient-hero);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Animated gradient mesh background */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-mesh);
  opacity: 0.3;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(10%, 10%) scale(1.1); }
}

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

.hero h1 {
  font-size: var(--text-6xl);
  margin-bottom: var(--spacing-md);
  color: white;
  font-weight: 800;
  letter-spacing: -0.03em;
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.95;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===========================
   Buttons - Modern & Interactive
   =========================== */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--text-base);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-outline:hover {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===========================
   Cards & Grid - Modern Bento Style
   =========================== */

.grid {
  display: grid;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 350px), 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.card {
  background-color: var(--bg-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--secondary-light);
}

.card:hover::before {
  transform: scaleX(1);
}

.card img {
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  transition: transform var(--transition);
}

.card:hover img {
  transform: scale(1.02);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

.card p {
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  font-size: var(--text-sm);
}

/* Push buttons to bottom of card */
.card > .btn,
.card > a.btn {
  margin-top: auto;
}

/* Remove bottom margin from last paragraph before button */
.card > p:last-of-type {
  margin-bottom: 0;
}

/* Ensure proper spacing before button */
.card > .btn,
.card > a.btn {
  margin-top: auto;
  align-self: flex-start;
  width: fit-content;
}

/* ===========================
   Book Showcase - Featured Layout
   =========================== */

.book-card {
  display: flex;
  flex-direction: row;
  gap: var(--spacing-xl);
  align-items: flex-start;
  padding: var(--spacing-xl);
}

.book-cover {
  flex-shrink: 0;
  width: 250px;
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-lg);
  transition: transform var(--transition);
}

.book-card:hover .book-cover {
  transform: translateY(-8px) rotate(2deg);
}

.book-info {
  flex: 1;
}

.book-info h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
  font-size: var(--text-3xl);
}

.book-meta {
  color: var(--text-light);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

/* ===========================
   Forms - Modern Input Design
   =========================== */

.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-dark);
  font-size: var(--text-sm);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: var(--font-secondary);
  transition: all var(--transition);
  background-color: var(--bg-light);
  color: var(--text-dark);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  transform: translateY(-2px);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

/* ===========================
   Footer - Modern & Clean
   =========================== */

footer {
  background: var(--gradient-hero);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  position: relative;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: var(--text-lg);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition);
}

.footer-section a:hover {
  color: white;
  padding-left: var(--spacing-xs);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  backdrop-filter: blur(10px);
}

.social-links a:hover {
  background-color: var(--secondary-color);
  transform: translateY(-4px) rotate(5deg);
  box-shadow: var(--shadow-lg);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
}

/* ===========================
   Scroll Animations
   =========================== */

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 77px;
    left: -100%;
    flex-direction: column;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    width: 100%;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition);
    align-items: flex-start;
  }

  [data-theme="dark"] .nav-links {
    background-color: rgba(15, 23, 42, 0.95);
  }

  .nav-links.active {
    left: 0;
  }

  .nav-links a::after {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }
}

@media (max-width: 480px) {
  .book-card {
    flex-direction: column;
    padding: var(--spacing-md);
  }

  .book-cover {
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
  }

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

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }
}

/* ===========================
   Utility Classes
   =========================== */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.bg-gray { background-color: var(--bg-gray); }
.bg-white { background-color: var(--bg-light); }

.shadow { box-shadow: var(--shadow); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }