/* Header Styles */
header {
    background-color: var(--dark-header);
    padding: 0.75rem 1.5rem;
    z-index: 2;
}

header #logo {
    width: 100%;
    max-width: 244px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

header #book-taco-logo {
    width: 100%;
    max-width: 296px;
}

#navbarNav ul {
    gap: 9px;
    align-items: center;
}

#navbarNav ul li a {
    color: #FFFFFF;
    font-weight: 600;
    font-size: 20px;
    font-family: 'Nunito', sans-serif;
}

#navbarNav ul li a:hover {
    color: var(--primary-warm);
}

/* Navigation Group */
.nav-group {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 1.5rem;
    margin: -4rem auto 2rem auto;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    z-index: 3;
    width: 100%;
}

.nav-group::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        rgba(255,255,255,0.8) 0%,
        rgba(255,255,255,0.95) 100%);
    border-radius: 16px;
    z-index: -1;
}

/* Tab Buttons */
.tab-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    position: relative;
    width: 100%;
}

.tab-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem !important;
    border-radius: 12px;
    font-weight: 600 !important;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    flex: 1;
    min-width: 160px;
    color: white !important;
    z-index: 1;
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.tab-btn-content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    z-index: 2;
    width: 100%;
    text-align: center;
}

.tab-btn-text {
    transition: transform 0.3s ease;
}

.tab-btn-icon {
    display: flex;
    align-items: center;
    transition: transform 0.3s ease;
}

/* Specific button colors and gradients */
.tab-btn.btn-warning {
    background: linear-gradient(135deg, var(--primary-warm) 0%, #E6C82B 100%);
    border-color: rgba(255, 217, 61, 0.2);
    box-shadow: 0 2px 8px rgba(255, 217, 61, 0.15);
}

.tab-btn.btn-warning::before {
    background: linear-gradient(135deg, #FF8C00 0%, #FF7F00 100%);
}

.tab-btn.btn-info {
    background: var(--gradient-accent);
    border-color: rgba(77, 182, 172, 0.2);
    box-shadow: 0 2px 8px rgba(77, 182, 172, 0.15);
}

.tab-btn.btn-info::before {
    background: linear-gradient(135deg, #3DA799 0%, var(--accent-turquoise) 100%);
}

.tab-btn.btn-success {
    background: var(--gradient-secondary);
    border-color: rgba(123, 193, 66, 0.2);
    box-shadow: 0 2px 8px rgba(123, 193, 66, 0.15);
}

.tab-btn.btn-success::before {
    background: linear-gradient(135deg, #68AE36 0%, var(--primary-cactus) 100%);
}

.tab-btn.btn-primary {
    background: var(--gradient-primary);
    border-color: rgba(255, 111, 60, 0.2);
    box-shadow: 0 2px 8px rgba(255, 111, 60, 0.15);
}

.tab-btn.btn-primary::before {
    background: linear-gradient(135deg, #FF5722 0%, #E64A19 100%);
}

/* Hover effects */
.tab-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
    color: white !important;
    text-decoration: none;
}

.tab-btn:hover::before {
    opacity: 1;
}

.tab-btn:hover .tab-btn-text {
    transform: translateX(-4px);
}

.tab-btn:hover .tab-btn-icon {
    transform: translateX(4px);
}

/* Active state */
.tab-btn.active {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.tab-btn.active::before {
    opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header {
        padding: 0.5rem 0;
    }

    header #logo {
        width: 100%;
        max-width: 224px;
    }

    .nav-group {
        margin: -1.5rem auto 1.5rem auto;
        padding: 1rem;
    }
    
    .tab-buttons {
        gap: 0.75rem;
    }
    
    .tab-btn {
        padding: 0.75rem 1rem !important;
        min-width: 140px;
        font-size: 0.9rem;
    }
    
    .tab-btn-content {
        gap: 8px;
    }

    #navbarNav ul {
        align-items: flex-start;
        padding: 2em;
    }

    #navbarNav ul li {
        margin-bottom: 1em;
    }

    #navbarNav ul li a {
        display: block;
        text-align: left;
        width: 100%;
        font-size: 16px;
    }

    .navbar-toggler {
        background: #FFF !important;
        color: #A03EEA !important;
    }
}

@media (min-width: 1200px) and (max-width: 1400px) {
    header #logo {
        width: 364px;
    }
}