/* ==========================================================================
   Glassmorphism Design System
   ========================================================================== */

/* CSS Variables for Consistent Theming */
:root {
    /* Color Palette */
    --primary-color: #667EEA;
    --secondary-color: #764BA2;
    --accent-color: #F093FB;
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);

    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-bg-hover: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --glass-shadow-hover: 0 12px 40px 0 rgba(31, 38, 135, 0.45);

    /* Blur Values */
    --blur-sm: 4px;
    --blur-md: 10px;
    --blur-lg: 20px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================================================
   Background Gradient
   ========================================================================== */
.gradient-background {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    position: relative;
}

.animated-gradient {
    background: linear-gradient(-45deg, #667EEA, #764BA2, #F093FB, #667EEA);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ==========================================================================
   Glass Components
   ========================================================================== */

/* Base Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow-hover);
}

/* Glass Card with Glow Effect */
.glass-card-glow::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.5),
        transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Glass Panel (lighter variant) */
.glass-panel {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

/* Glass Button */
.glass-button {
    background: linear-gradient(135deg,
        rgba(255, 255, 255, 0.1) 0%,
        rgba(255, 255, 255, 0.05) 100%);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-md);
    padding: 12px 24px;
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    display: inline-block;
    text-decoration: none;
}

.glass-button:hover {
    background: linear-gradient(135deg,
        rgba(255, 255, 255, 0.2) 0%,
        rgba(255, 255, 255, 0.1) 100%);
    transform: scale(1.05);
}

.glass-button:active {
    transform: scale(0.98);
}

/* Glass Button - Primary Variant */
.glass-button-primary {
    background: linear-gradient(135deg,
        rgba(102, 126, 234, 0.4) 0%,
        rgba(118, 75, 162, 0.4) 100%);
}

.glass-button-primary:hover {
    background: linear-gradient(135deg,
        rgba(102, 126, 234, 0.6) 0%,
        rgba(118, 75, 162, 0.6) 100%);
}

/* Glass Input Field */
.glass-input {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 16px;
    transition: all var(--transition-fast);
    width: 100%;
    box-sizing: border-box;
}

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

.glass-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Glass Badge/Chip */
.glass-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 4px;
    white-space: nowrap;
}

/* Glass Filter Chip */
.glass-filter-chip {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin: 4px;
}

.glass-filter-chip:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.glass-filter-chip.active {
    background: linear-gradient(135deg,
        rgba(102, 126, 234, 0.3) 0%,
        rgba(118, 75, 162, 0.3) 100%);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Text Utilities */
.text-glass-primary { color: var(--text-primary); }
.text-glass-secondary { color: var(--text-secondary); }
.text-glass-muted { color: var(--text-muted); }

/* Spacing Utilities */
.glass-p-xs { padding: var(--spacing-xs); }
.glass-p-sm { padding: var(--spacing-sm); }
.glass-p-md { padding: var(--spacing-md); }
.glass-p-lg { padding: var(--spacing-lg); }
.glass-p-xl { padding: var(--spacing-xl); }

.glass-m-xs { margin: var(--spacing-xs); }
.glass-m-sm { margin: var(--spacing-sm); }
.glass-m-md { margin: var(--spacing-md); }
.glass-m-lg { margin: var(--spacing-lg); }
.glass-m-xl { margin: var(--spacing-xl); }

/* Blur Utilities */
.blur-sm { backdrop-filter: blur(var(--blur-sm)); }
.blur-md { backdrop-filter: blur(var(--blur-md)); }
.blur-lg { backdrop-filter: blur(var(--blur-lg)); }

/* ==========================================================================
   Browser Compatibility
   ========================================================================== */

/* Fallback for browsers without backdrop-filter support */
@supports not (backdrop-filter: blur(10px)) {
    .glass-card,
    .glass-panel,
    .glass-button,
    .glass-input,
    .glass-badge,
    .glass-filter-chip {
        background: rgba(255, 255, 255, 0.95);
        box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
    }

    .glass-card:hover {
        background: rgba(255, 255, 255, 0.98);
    }
}

/* ==========================================================================
   Animations
   ========================================================================== */

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

.fade-in {
    animation: fadeIn var(--transition-slow) ease-out;
}

/* Pulse Animation for CTAs */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Glow Animation */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 40px rgba(102, 126, 234, 0.8);
    }
}

.glow {
    animation: glow 2s infinite;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
    }

    .glass-card {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .glass-button {
        padding: 10px 20px;
        font-size: 14px;
    }
}