/**
 * Base Styles - Core foundation for StreamVault
 * This file contains the fundamental styles and CSS variables
 */

/* CSS Custom Properties (Variables) */
:root {
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-modal: 1050;
  --z-tooltip: 1100;
  --z-overlay: 1200;
}

/* Dark Theme Variables */
:root.dark {
  --dark-50: rgb(31, 41, 55);
  --dark-100: rgb(17, 24, 39);
  --dark-200: rgb(31, 41, 55);
  --dark-300: rgb(17, 24, 39);
}

/* Light Theme Variables */
:root:not(.dark) {
  --dark-50: rgb(249, 250, 251);
  --dark-100: rgb(243, 244, 246);
  --dark-200: rgb(229, 231, 235);
  --dark-300: rgb(209, 213, 219);
}

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

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: rgb(17, 24, 39);
  background-color: white;
  transition: background-color var(--transition), color var(--transition);
  min-height: 100vh;
}

.dark body {
  color: white;
  background-color: var(--dark-300);
}

/* Focus Styles */
:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Button Reset */
button {
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}

/* Link Reset */
a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

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

/* List Reset */
ul, ol {
  list-style: none;
}

/* Form Elements */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgb(156, 163, 175);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgb(107, 114, 128);
}

.dark ::-webkit-scrollbar-thumb {
  background: rgb(75, 85, 99);
}

.dark ::-webkit-scrollbar-thumb:hover {
  background: rgb(107, 114, 128);
}

/* 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;
}

.container {
  width: 100%;
  margin: 0 auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

@media (min-width: 640px) {
  .container {
    max-width: 640px;
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 768px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1024px;
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: 1280px;
  }
}

@media (min-width: 1536px) {
  .container {
    max-width: 1536px;
  }
}

/* Animation Keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

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

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes glow {
  from {
    box-shadow: 0 0 5px var(--primary), 0 0 10px var(--primary);
  }
  to {
    box-shadow: 0 0 10px var(--primary), 0 0 20px var(--primary);
  }
}

@keyframes particle {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100vh) rotate(360deg);
    opacity: 0;
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn 0.6s ease-in-out;
}

.animate-slide-up {
  animation: slideUp 0.8s ease-out;
}

.animate-slide-left {
  animation: slideLeft 0.6s ease-out;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-glow {
  animation: glow 2s ease-in-out infinite alternate;
}

.animate-particle {
  animation: particle 20s linear infinite;
}