/* =========================================================================
   RUSCA.ORG MODERN UI (Glassmorphism, Soft Shadows, Gradients)
   ========================================================================= */

:root {
    /* Modern Gradients */
    --gradient-primary: linear-gradient(135deg, #1a237e 0%, #3949ab 100%);
    --gradient-success: linear-gradient(135deg, #2e7d32 0%, #4caf50 100%);
    --gradient-warning: linear-gradient(135deg, #f57f17 0%, #ffca28 100%);
    
    /* Soft Shadows */
    --shadow-soft: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --shadow-hover: 0 12px 40px 0 rgba(31, 38, 135, 0.12);
    
    /* Glassmorphism Backgrounds */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-blur: blur(12px);
}

body.dark-mode {
    --gradient-primary: linear-gradient(135deg, #283593 0%, #5c6bc0 100%);
    --shadow-soft: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 12px 40px 0 rgba(0, 0, 0, 0.45);
    --glass-bg: rgba(26, 30, 58, 0.75);
    --glass-border: rgba(255, 255, 255, 0.05);
}

/* Glassmorphism Card Overrides */
.card, .lesson-card, .rcp-card, .rc-daily-card {
    background: var(--glass-bg) !important;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border) !important;
    box-shadow: var(--shadow-soft) !important;
    border-radius: 16px !important;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1) !important;
}

.card:hover, .lesson-card:hover, .rcp-card:hover {
    transform: translateY(-4px) !important;
    box-shadow: var(--shadow-hover) !important;
}

/* Gradient Buttons */
.btn-primary, .rcp-btn.new, .rc-nav-cta {
    background: var(--gradient-primary) !important;
    border: none !important;
    color: #fff !important;
    box-shadow: 0 4px 15px rgba(26, 35, 126, 0.2) !important;
    transition: all 0.2s ease !important;
}

.btn-primary:hover, .rc-nav-cta:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(26, 35, 126, 0.3) !important;
}

/* Navbar Modernization */
.rc-nav {
    background: rgba(255, 255, 255, 0.85) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}
body.dark-mode .rc-nav {
    background: rgba(26, 30, 58, 0.85) !important;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* Micro Animations (Pop-ups, XP gains) */
@keyframes pop-in {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes xp-float {
    0% { transform: translateY(0) scale(1); opacity: 1; }
    100% { transform: translateY(-40px) scale(1.2); opacity: 0; }
}

@keyframes shake-wrong {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

.anim-pop { animation: pop-in 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-shake { animation: shake-wrong 0.4s ease-in-out; }

/* Feedback animations */
.feedback-xp {
    position: absolute;
    color: #ffc107;
    font-weight: 800;
    font-size: 1.2rem;
    pointer-events: none;
    animation: xp-float 1s ease-out forwards;
    z-index: 9999;
}

/* Hero Gradient Update */
.rc-hero-banner {
    background: var(--gradient-primary) !important;
    box-shadow: 0 10px 30px rgba(26,35,126, 0.25);
    border: 1px solid rgba(255,255,255, 0.1);
}