/* Glassmorphism Styles */

.glass-card,
.glass-modal,
.glass-header {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    box-shadow: 
        0 8px 32px 0 rgba(0, 0, 0, 0.37),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
}

.glass-header {
    position: relative;
    overflow: hidden;
}

.glass-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent,
        var(--primary),
        var(--success),
        transparent
    );
    animation: shimmer 3s infinite;
}

.glass-card {
    transition: all var(--transition-speed);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 12px 40px 0 rgba(0, 0, 0, 0.5),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
}

.glass-modal {
    position: relative;
    overflow: hidden;
}

.glass-modal::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle,
        rgba(59, 130, 246, 0.1) 0%,
        transparent 70%
    );
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

/* Glass button variant */
.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.btn-glass::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-glass:hover::before {
    width: 300px;
    height: 300px;
}

/* Glass panel - lighter variant for content areas */
.glass-panel {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px) saturate(150%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--border-radius);
    box-shadow: 
        0 4px 16px 0 rgba(0, 0, 0, 0.2),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.03);
    transition: all var(--transition-speed);
}

.glass-panel:hover {
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 
        0 6px 20px 0 rgba(0, 0, 0, 0.3),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
}

/* Glass navigation */
.glass-nav {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
}

/* Frosted glass effect for overlays */
.frosted {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(30px) saturate(200%);
    -webkit-backdrop-filter: blur(30px) saturate(200%);
}

/* Shimmer animation */
@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Glass effect for cards in list/calendar */
.vacation-card,
.user-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.vacation-card::after,
.user-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transition: left 0.5s;
}

.vacation-card:hover::after,
.user-card:hover::after {
    left: 100%;
}

.vacation-card:hover,
.user-card:hover {
    transform: translateY(-2px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Enhanced depth with multiple glass layers */
.glass-layered {
    background: 
        linear-gradient(
            135deg,
            rgba(30, 41, 59, 0.8) 0%,
            rgba(30, 41, 59, 0.6) 100%
        );
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 
        0 8px 32px 0 rgba(0, 0, 0, 0.37),
        inset 0 1px 0 0 rgba(255, 255, 255, 0.08),
        inset 0 -1px 0 0 rgba(0, 0, 0, 0.2);
}