/* Main CSS - Modern CSS with custom properties and modern layout */

/* ===== CSS CUSTOM PROPERTIES (CSS Variables) ===== */
:root {
  /* Colors */
  --color-primary: #2c3e50;
  --color-secondary: #3498db;
  --color-accent: #e74c3c;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-background: #ffffff;
  --color-background-alt: #f8f9fa;
  --color-border: #e1e5e9;
  --color-shadow: rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-primary: "Cardo-Regular", Georgia, serif;
  --font-heading: "Afterclap", "Cardo-Bold", Georgia, serif;
  --font-body: "Cardo-Regular", Georgia, serif;
  --font-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  
  /* Font Sizes - Fluid Typography */
  --font-size-xs: clamp(0.75rem, 0.5vw + 0.5rem, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.5vw + 0.75rem, 1rem);
  --font-size-base: clamp(1rem, 0.5vw + 0.875rem, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1vw + 1rem, 1.5rem);
  --font-size-xl: clamp(1.5rem, 2vw + 1rem, 2.5rem);
  --font-size-2xl: clamp(2rem, 3vw + 1.5rem, 4rem);
  --font-size-3xl: clamp(2.5rem, 4vw + 2rem, 6rem);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --container-padding: var(--space-md);
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --box-shadow-sm: 0 1px 3px var(--color-shadow);
  --box-shadow-md: 0 4px 6px var(--color-shadow);
  --box-shadow-lg: 0 10px 15px var(--color-shadow);
}

/* ===== IMAGE PLACEHOLDERS ===== */
.img-placeholder {
  background-color: #ddd;
  background-image: 
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 10px,
      rgba(255,255,255,.1) 10px,
      rgba(255,255,255,.1) 20px
    );
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: var(--font-size-sm);
  font-weight: bold;
  text-align: center;
  border: 1px solid #ccc;
  border-radius: var(--border-radius);
}

.img-placeholder::before {
  content: "📷 Image Placeholder";
  padding: var(--space-sm);
}

/* Specific placeholder sizes */
.img-placeholder.profile {
  width: 300px;
  height: 400px;
  max-width: 100%;
}

.img-placeholder.blog-header {
  width: 100%;
  height: 200px;
}

.img-placeholder.blog-icon {
  width: 100%;
  height: 150px;
}

.img-placeholder.social-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
}

.img-placeholder.social-icon::before {
  content: "📱";
  font-size: 20px;
}

.img-placeholder.visualization {
  width: 100%;
  height: 300px;
}

.img-placeholder.inline {
  width: 40%;
  height: 200px;
  float: right;
  margin: 0.5%;
}

/* Social media styling */
.social-links {
  margin: var(--space-lg) 0;
}

.social-icons {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.social-link {
  text-decoration: none;
}

.social-link:hover .img-placeholder {
  background-color: #ccc;
  transform: scale(1.05);
  transition: var(--transition-normal);
}

/* ===== FONT FACES ===== */
@font-face {
  font-family: "Afterclap";
  src: url("../fonts/Afterclap_Personal_Use.otf") format("opentype");
  font-display: swap;
}

@font-face {
  font-family: "Cardo-Bold";
  src: url("../fonts/Cardo-Bold.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Cardo-Italic";
  src: url("../fonts/Cardo-Italic.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Cardo-Regular";
  src: url("../fonts/Cardo-Regular.ttf") format("truetype");
  font-display: swap;
}

/* ===== RESET & BASE STYLES ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  height: 100%;
  scroll-padding-top: 80px; /* Account for fixed header */
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Main content area */
main {
  position: relative;
  z-index: 1;
  margin-top: 80px; /* Space for fixed header */
}

/* ===== ACCESSIBILITY ===== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: 9999;
  transition: var(--transition-fast);
  opacity: 0;
  visibility: hidden;
}

.skip-link:focus {
  top: 6px;
  opacity: 1;
  visibility: visible;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-sm) 0;
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--color-primary);
}

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

p {
  margin: 0 0 var(--space-sm) 0;
}

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

a:hover,
a:focus {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ===== LAYOUT COMPONENTS ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  min-height: 44px; /* Touch target size */
}

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

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--box-shadow-md);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
}

/* ===== HERO SECTION ===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-xl) 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.profile-image {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--box-shadow-lg);
  object-fit: cover;
}

/* ===== SECTIONS ===== */
.page-header {
  padding: var(--space-2xl) 0 var(--space-xl) 0;
  background-color: var(--color-background-alt);
  text-align: center;
}

.page-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-sm);
}

.page-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.about-section,
.featured-content {
  padding: var(--space-3xl) 0;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
}

/* ===== CONTENT GRIDS ===== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.content-card {
  background: white;
  padding: var(--space-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--box-shadow-sm);
  transition: var(--transition-normal);
}

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

.card-link {
  display: inline-block;
  margin-top: var(--space-md);
  font-weight: 500;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-sm);
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .content-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== UTILITIES ===== */
.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;
}