/* ================================================================
   Tom Buchkoe Photography - Modern CSS Design System
   Dark/Dramatic Theme for Professional Photography Portfolio
   ================================================================ */

/* ----------------------------------------------------------------
   CSS Custom Properties (Variables)
   ---------------------------------------------------------------- */
:root {
  /* Colors - Dark/Dramatic Theme */
  --color-primary: #ff4500;           /* Modern orange accent */
  --color-primary-dark: #cc3700;      /* Darker orange for hover */
  --color-primary-light: #ff6633;     /* Lighter orange */

  --color-bg-dark: #0a0a0a;           /* Nearly black background */
  --color-bg-medium: #1a1a1a;         /* Medium dark for cards */
  --color-bg-light: #2a2a2a;          /* Lighter dark for hover */

  --color-text-primary: #f5f5f5;      /* Off-white for main text */
  --color-text-secondary: #b0b0b0;    /* Gray for secondary text */
  --color-text-muted: #808080;        /* Muted gray */

  --color-border: #333333;            /* Border color */
  --color-border-light: #404040;      /* Lighter border */

  /* Spacing System */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-2xl: 4rem;     /* 64px */
  --space-3xl: 6rem;     /* 96px */

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Helvetica Neue", Arial, sans-serif;

  --font-size-base: 16px;
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 2rem;       /* 32px */
  --font-size-4xl: 2.5rem;     /* 40px */

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Layout */
  --max-width-content: 1200px;
  --max-width-text: 800px;
  --header-height: 80px;

  /* Effects */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ----------------------------------------------------------------
   Typography
   ---------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-lg);
}

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

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

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

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

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

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong, b {
  font-weight: 700;
}

em, i {
  font-style: italic;
}

/* ----------------------------------------------------------------
   Layout Components
   ---------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

main {
  flex: 1;
  padding-top: var(--header-height);
}

.section {
  padding: var(--space-2xl) 0;
}

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

.section-lg {
  padding: var(--space-3xl) 0;
}

/* ----------------------------------------------------------------
   Header & Navigation
   ---------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background-color var(--transition-normal);
}

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

.logo {
  height: 50px;
  width: auto;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

.nav {
  display: none;
}

.nav-list {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  align-items: center;
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(255, 69, 0, 0.1);
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-text-primary);
}

.mobile-menu-toggle:hover {
  color: var(--color-primary);
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}

.hamburger span {
  display: block;
  height: 3px;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-menu-toggle.active .hamburger span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.mobile-menu-toggle.active .hamburger span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg-dark);
  border-bottom: 1px solid var(--color-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.mobile-menu.active {
  max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
}

.mobile-menu-list {
  list-style: none;
  padding: var(--space-md);
}

.mobile-menu-item {
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-link {
  display: block;
  padding: var(--space-md);
  color: var(--color-text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-menu-link:hover,
.mobile-menu-link.active {
  color: var(--color-primary);
  background-color: rgba(255, 69, 0, 0.05);
}

/* Desktop Navigation */
@media (min-width: 768px) {
  .nav {
    display: block;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .mobile-menu {
    display: none;
  }
}

/* ----------------------------------------------------------------
   Footer
   ---------------------------------------------------------------- */
.footer {
  background-color: var(--color-bg-dark);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer-content {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.footer-section p,
.footer-section a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ----------------------------------------------------------------
   Buttons
   ---------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-primary);
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: white;
}

.btn-large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

.btn-small {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
}

/* ----------------------------------------------------------------
   Cards
   ---------------------------------------------------------------- */
.card {
  background-color: var(--color-bg-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.card-image {
  width: 100%;
  height: auto;
  display: block;
}

.card-content {
  padding: var(--space-lg);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.card-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

/* ----------------------------------------------------------------
   Grid Systems
   ---------------------------------------------------------------- */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-md);
  padding: var(--space-lg) 0;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  cursor: pointer;
  aspect-ratio: 4/3;
  background-color: var(--color-bg-medium);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  padding: var(--space-md);
  transform: translateY(100%);
  transition: transform var(--transition-normal);
}

.gallery-item:hover .gallery-item-overlay {
  transform: translateY(0);
}

.gallery-item-title {
  color: white;
  font-size: var(--font-size-sm);
  margin: 0;
}

/* ----------------------------------------------------------------
   Hero Section
   ---------------------------------------------------------------- */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(255, 69, 0, 0.1) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: var(--space-xl);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 4rem);
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ----------------------------------------------------------------
   Lightbox
   ---------------------------------------------------------------- */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.95);
  z-index: 10000;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
  transition: color var(--transition-fast);
  z-index: 10001;
}

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

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.lightbox-nav:hover {
  background: rgba(255, 69, 0, 0.3);
}

.lightbox-prev {
  left: var(--space-md);
}

.lightbox-next {
  right: var(--space-md);
}

.lightbox-caption {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  color: white;
  background: rgba(0, 0, 0, 0.7);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

/* ----------------------------------------------------------------
   Forms
   ---------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
  font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: 1rem;
  font-family: var(--font-primary);
  color: var(--color-text-primary);
  background-color: var(--color-bg-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.1);
}

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

.form-help {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ----------------------------------------------------------------
   Utility Classes
   ---------------------------------------------------------------- */
.text-center {
  text-align: center;
}

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

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

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

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

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

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.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;
}

/* ----------------------------------------------------------------
   Animations
   ---------------------------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-normal);
}

.slide-up {
  animation: slideUp var(--transition-normal);
}

/* ----------------------------------------------------------------
   Responsive Design
   ---------------------------------------------------------------- */
@media (max-width: 767px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --space-3xl: 4rem;
  }

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

@media (min-width: 1400px) {
  :root {
    --max-width-content: 1400px;
  }
}

/* ----------------------------------------------------------------
   Print Styles
   ---------------------------------------------------------------- */
@media print {
  .header,
  .footer,
  .mobile-menu-toggle,
  .lightbox {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}