/* Header CSS - Fixed header styles */
.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    box-shadow: var(--card-shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.header-left, .header-right {
    display: flex;
    gap: 0.5rem;
}

.header-center {
    text-align: center;
    flex: 1;
}

.header-center h1 {
    font-family: 'Press Start 2P', cursive;
    font-size: 1.5rem;
    font-weight: 400;
    background: linear-gradient(45deg, #ff6b6b, #feca57, #48dbfb, #ff9ff3, #f472b6);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease infinite;
    margin-bottom: 0.25rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.header-center h1 i {
    background: linear-gradient(45deg, #ff6b6b, #feca57, #48dbfb, #ff9ff3, #f472b6);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease infinite;
}

.fixed-header .header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.fixed-header .subtitle {
    font-size: 0.85rem;
}

.header-controls {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.header-controls .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

.header-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0 0.5rem;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

.theme-toggle, .settings-toggle {
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.theme-toggle:hover, .settings-toggle:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

/* Rhythm toggle active state */
.settings-toggle.active {
    background: linear-gradient(135deg, #f472b6, #a855f7);
    border-color: #f472b6;
    color: white;
    box-shadow: 0 0 15px rgba(244, 114, 182, 0.4);
}

.settings-toggle.pulsing {
    animation: pulseGlow 0.5s ease-out;
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 5px rgba(244, 114, 182, 0.3); }
    50% { box-shadow: 0 0 20px rgba(244, 114, 182, 0.7); }
    100% { box-shadow: 0 0 5px rgba(244, 114, 182, 0.3); }
}

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

@media (max-width: 768px) {
    .fixed-header {
        padding: 0.5rem 0.75rem;
    }
    
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 0;
    }
    
    .header-left, .header-right {
        position: static;
        display: flex;
        gap: 0.35rem;
    }
    
    .header-center {
        flex: 1;
        text-align: center;
        padding-top: 0;
    }
    
    .fixed-header .header h1 {
        font-size: 0.9rem;
    }
    
    .fixed-header .subtitle {
        display: none;
    }
    
    .theme-toggle, .settings-toggle {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
        border-radius: 8px;
    }
    
    .header-actions {
        margin-bottom: 0;
        padding: 0;
    }
}

@media (max-width: 480px) {
    .fixed-header {
        padding: 0.35rem 0.5rem;
    }
    
    .fixed-header .header h1 {
        font-size: 0.75rem;
    }
    
    .theme-toggle, .settings-toggle {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    .header-left, .header-right {
        gap: 0.25rem;
    }
}