:root {
    /* LIGHT MODE (Sleek & Professional) */
    --color-background: #f8fafc;
    --color-on-background: #0f172a;
    
    --color-surface: #ffffff;
    --color-on-surface: #1e293b;
    --color-surface-variant: #f1f5f9;
    --color-on-surface-variant: #475569;
    
    --color-primary: #5473FF;
    --color-on-primary: #ffffff;
    --color-primary-container: #dbeafe;
    --color-on-primary-container: #1e3a8a;
    
    --color-secondary: #059669;
    --color-on-secondary: #ffffff;
    --color-secondary-container: #d1fae5;
    --color-on-secondary-container: #064e3b;
    
    --color-error: #ef4444;
    --color-on-error: #ffffff;
    
    --color-border: #e2e8f0;
    --color-brand-gold: #f2ca50;
    
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
}

.dark {
    /* DARK MODE (Premium Deep Dark & Neon Accents) */
    --color-background: #0b0e11;
    --color-on-background: #fafafa;
    
    --color-surface: #181a20;
    --color-on-surface: #f4f4f5;
    --color-surface-variant: #1e2329;
    --color-on-surface-variant: #a1a1aa;
    
    --color-primary: #5473FF;
    --color-on-primary: #ffffff;
    --color-primary-container: #1e3a8a;
    --color-on-primary-container: #bfdbfe;
    
    --color-secondary: #10b981;
    --color-on-secondary: #ffffff;
    --color-secondary-container: #064e3b;
    --color-on-secondary-container: #a7f3d0;
    
    --color-error: #f87171;
    --color-on-error: #450a0a;
    
    --color-border: #2b3139;
    --color-brand-gold: #f2ca50;
    
    --glass-bg: #181a20;
    --glass-border: #2b3139;
    --glass-shadow: none;
}

/* Base Body Transitions */
body {
    background-color: var(--color-background);
    color: var(--color-on-background);
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                color 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Premium Glassmorphism Cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px 0 rgba(0, 0, 0, 0.15);
    border-color: var(--color-primary);
}

/* Dynamic Gradients */
.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Micro Animations */
.neon-glow-primary {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
    transition: box-shadow 0.3s ease;
}
.neon-glow-primary:hover {
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
}

.neon-glow-secondary {
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
    transition: box-shadow 0.3s ease;
}
.neon-glow-secondary:hover {
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.5);
}

.pulse-fast {
    animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.9); }
}

/* Theme Toggle Button Styles */
.theme-toggle-btn {
    position: relative;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-on-surface);
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle-btn:hover {
    background: var(--color-surface-variant);
    transform: scale(1.05);
}

.theme-toggle-icon {
    font-size: 24px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark .theme-toggle-icon {
    transform: rotate(180deg);
}

/* Global High-Legibility Input overrides */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="search"],
select,
textarea {
    background-color: var(--color-surface-variant) !important;
    color: var(--color-on-surface) !important;
    border-color: var(--color-border) !important;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="search"]:focus,
select:focus,
textarea:focus {
    border-color: var(--color-primary) !important;
    box-shadow: 0 0 0 1px var(--color-primary) !important;
    background-color: var(--color-surface-variant) !important;
    color: var(--color-on-surface) !important;
}

/* Specific styling for placeholder text across both themes */
::placeholder {
    color: var(--color-on-surface-variant) !important;
    opacity: 0.6 !important;
}