/* ================================================================= */
/* BEYOND LANGUAGE ACADEMY - PREMIUM DESIGN SYSTEM                   */
/* Neo-Brutalism meets Professional EdTech                           */
/* ================================================================= */

/* === CSS CUSTOM PROPERTIES === */
:root {
  /* Primary Colors */
  --black-primary: #000000;      /* Deep black for backgrounds and borders */
  --black-secondary: #121212;    /* Subtle dark gray for depth */
  --yellow-primary: #FFD700;     /* Vibrant yellow for CTAs */
  --yellow-accent: #FFCE00;      /* Slightly darker yellow for hover states */
  
  /* Warning & Success Colors (theme-compatible) */
  --warning-color: #FF6B35;      /* Soft orange-red for form errors */
  --success-color: #00D084;      /* Green for success messages */
  
  /* Neutral Colors */
  --white: #FFFFFF;
  --gray-light: #F8F9FA;
  --gray-medium: #E2E8F0;
  
  /* Neo-brutalism Design Tokens */
  --border-width: 3px;           /* Standard border width for all interactive elements */
  --border-width-thin: 2px;      /* Thin border for inputs */
  --border-color: #000000;       /* Always solid black */
  --border-radius: 12px;         /* Consistent rounded corners */
  --border-radius-small: 8px;    /* Small radius for alerts */
  --shadow-offset: 8px;          /* Drop shadow offset for Neo-brutalist cards */
  
  /* Typography */
  --font-primary: 'Montserrat', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
  
  /* Z-index layers */
  --z-preloader: 10000;
  --z-navbar: 9999;
  --z-sticky-cta: 9998;
  --z-modal: 9000;
  --z-overlay: 8000;
}

/* === GOOGLE FONTS IMPORT === */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;900&display=swap');

/* === GLOBAL RESETS & BASE STYLES === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.6;
  color: var(--white);
  background-color: var(--black-primary);
  overflow-x: hidden;
}

/* === FLUID TYPOGRAPHY === */
h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
}

p {
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: var(--font-weight-regular);
}

/* === NEO-BRUTALIST COMPONENT UTILITIES === */

/* Neo Card - White background with black border and yellow shadow */
.neo-card {
  background-color: var(--white);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--yellow-primary);
  padding: var(--spacing-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.neo-card:hover {
  transform: translateY(-4px);
  box-shadow: calc(var(--shadow-offset) + 2px) calc(var(--shadow-offset) + 2px) 0 var(--yellow-primary);
}

/* Neo Button - Yellow background with black border */
.neo-button {
  background-color: var(--yellow-primary);
  color: var(--black-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  padding: clamp(0.75rem, 2vw, 1rem) clamp(1.5rem, 4vw, 2.5rem);
  font-size: clamp(1rem, 2vw, 1.125rem);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.neo-button:hover {
  transform: scale(1.05);
  box-shadow: 4px 4px 0 var(--black-primary);
  background-color: var(--yellow-accent);
}

.neo-button:active {
  transform: scale(0.98);
  box-shadow: 2px 2px 0 var(--black-primary);
}

/* Neo Input - White background with black border, yellow on focus */
.neo-input {
  background-color: var(--white);
  color: var(--black-primary);
  border: var(--border-width-thin) solid var(--border-color);
  border-radius: var(--border-radius-small);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: var(--font-primary);
  transition: border-color var(--transition-normal), border-width var(--transition-normal);
  width: 100%;
}

.neo-input:focus {
  outline: none;
  border-color: var(--yellow-primary);
  border-width: var(--border-width);
}

.neo-input::placeholder {
  color: #6B7280;
}

/* Textarea variant */
textarea.neo-input {
  resize: vertical;
  min-height: 120px;
}

/* === NEO-BRUTALIST ALERT BOXES === */

/* Error Alert - Orange background with black border */
.neo-alert-error {
  background-color: var(--warning-color);
  color: var(--black-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-small);
  padding: var(--spacing-sm);
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: var(--spacing-sm);
}

/* Success Alert - Green background with black border */
.neo-alert-success {
  background-color: var(--success-color);
  color: var(--black-primary);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius-small);
  padding: var(--spacing-sm);
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: var(--spacing-sm);
}

/* Alert icons */
.neo-alert-error svg,
.neo-alert-success svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* === GLASSMORPHISM EFFECT === */
.glassmorphism {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

/* === ANIMATION LIBRARY === */

/* Fade in with slide up */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

/* Fade in with slide down */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-down {
  animation: fadeInDown 0.8s ease-out forwards;
}

/* Scale in */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-scale-in {
  animation: scaleIn 0.6s ease-out forwards;
}

/* Pulse animation for preloader */
@keyframes pulse {
  0%, 100% {
    transform: scale(0.95);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.05);
    opacity: 1;
  }
}

.animate-pulse {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Animation delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-600 { animation-delay: 0.6s; }

/* === UTILITY CLASSES === */

/* Text colors */
.text-black { color: var(--black-primary); }
.text-white { color: var(--white); }
.text-yellow { color: var(--yellow-primary); }

/* Background colors */
.bg-black { background-color: var(--black-primary); }
.bg-black-secondary { background-color: var(--black-secondary); }
.bg-white { background-color: var(--white); }
.bg-yellow { background-color: var(--yellow-primary); }

/* Font weights */
.font-regular { font-weight: var(--font-weight-regular); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-black { font-weight: var(--font-weight-black); }

/* Spacing utilities */
.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); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }

/* === RESPONSIVE BREAKPOINTS === */

/* Small devices (landscape phones, 640px and up) */
@media (min-width: 640px) {
  .sm\:text-lg { font-size: 1.125rem; }
  .sm\:p-4 { padding: var(--spacing-lg); }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .md\:text-xl { font-size: 1.25rem; }
  .md\:p-6 { padding: var(--spacing-xl); }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
  .lg\:text-2xl { font-size: 1.5rem; }
  .lg\:p-8 { padding: 4rem; }
}

/* Extra large devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
  .xl\:text-3xl { font-size: 1.875rem; }
}

/* === HOVER EFFECTS === */
.hover-lift {
  transition: transform var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.hover-scale {
  transition: transform var(--transition-fast);
}

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

/* === FOCUS STATES === */
*:focus-visible {
  outline: 2px solid var(--yellow-primary);
  outline-offset: 2px;
}

/* === SMOOTH SCROLLING === */
html {
  scroll-behavior: smooth;
}

/* === SELECTION STYLING === */
::selection {
  background-color: var(--yellow-primary);
  color: var(--black-primary);
}

::-moz-selection {
  background-color: var(--yellow-primary);
  color: var(--black-primary);
}