/* ==========================================================================
   Base Styles
   ========================================================================== */

/* TODO: Add comments to explain each section for what is used for what for decs .. */
/* Variables */
:root {

  --temp-background: #23465E;
  /* Colors */
  --color-navy: #0a192f;
  --color-light-navy: #172a45;
  --color-lightest-navy: #303C55;
  --color-slate: #8892b0;
  --color-light-slate: #a8b2d1;
  --color-lightest-slate: #ccd6f6;
  --color-white: #e6f1ff;
  --color-accent: #64ffda;
  --color-accent-rgb: 100, 255, 218;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  --font-size-base: 1rem;
  --line-height-base: 1.6;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2.5rem;
  
  /* Border radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(2, 12, 27, 0.3);
  --shadow-md: 0 4px 12px rgba(2, 12, 27, 0.4);
  --shadow-lg: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
  
  /* Transitions */
  --transition: all 0.3s ease;
  --transition-slow: all 0.5s cubic-bezier(0.645, 0.045, 0.355, 1);
  
  /* Layout */
  --max-width: 1000px;
  --header-height: 70px;
  --body-padding: 20px;
  --app-padding: 2.5rem;
}

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

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

body {
  /* border: 10px solid red; */


  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-light-slate);
  /* background-color: var(--color-navy); */
  background-color: var(--temp-background);
  min-height: 100vh;
  padding: var(--body-padding);
  overflow-x: hidden;
}

/* Layout */
#app {
  
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 600px;

  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--app-padding);
  background-color: var(--temp-background);

  .header-img {
    position: absolute;
    
    height:50%;
    padding: 10px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-white);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(90deg, var(--color-accent), var(--color-white));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
}

h1::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -10px;
  left: 0;
  background: var(--color-accent);
  transform: scaleX(0.7);
  transform-origin: left;
}

/* Links */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

/* Buttons */
button, .btn {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

button:hover, .btn:hover {
  background: rgba(var(--color-accent-rgb), 0.5);
  transform: translateY(-2px);
}

button:disabled, .btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Code blocks */
code, pre {
  font-family: var(--font-mono);
  background: rgba(var(--color-accent-rgb), 0.1);
  color: var(--color-accent);
  border-radius: var(--border-radius-sm);
  font-size: 0.9em;
}

code {
  padding: 0.2em 0.4em;
}

pre {
  padding: 1em;
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

/* Lists */
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: 1.5em;
}

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

/* Utility Classes */
.text-accent { color: var(--color-accent); }
.text-white { color: var(--color-white); }
.bg-navy { background-color: var(--color-navy); }

/* Animations */
@keyframes fadeIn {
  from { 
    opacity: 0; 
    transform: translateY(20px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --body-padding: 15px;
    --app-padding: 1.5rem;
  }
  
  #app {
    margin: 0 1rem;
  }
  
  h1 {
    font-size: 2rem;
  }
}
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

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

a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Buttons */
button, .btn {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

button:hover, .btn:hover {
  background: rgba(var(--color-accent-rgb), 0.1);
  transform: translateY(-2px);
}

button:disabled, .btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Code blocks */
code, pre {
  font-family: var(--font-mono);
  background: rgba(var(--color-accent-rgb), 0.1);
  color: var(--color-accent);
  border-radius: var(--border-radius-sm);
  font-size: 0.9em;
}

code {
  padding: 0.2em 0.4em;
}

pre {
  padding: 1em;
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

/* Lists */
ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: 1.5em;
}

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

/* Utility Classes */
.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 */
.fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}

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