/* Constraints Modal */
.constraints-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.constraints-modal.hidden {
    display: none;
}

.constraints-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    /* backdrop-filter disabled - causes freezes in Epiphany/WebKit */
}

.constraints-container {
    position: relative;
    background: white;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    width: 80vw;
    max-width: 1200px;
    height: 80vh;
    max-height: 800px;
    overflow: hidden;
    z-index: 1;
    animation: constraints-fade-in 0.3s ease-out;
    display: flex;
    flex-direction: column;
}

@keyframes constraints-fade-in {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.constraints-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #e5e7eb;
    background: linear-gradient(to bottom, #f9fafb, #ffffff);
}

.constraints-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
}

.constraints-close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    color: #6b7280;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.constraints-close-btn:hover {
    background: #f3f4f6;
    color: #1f2937;
}

.constraints-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Tab Navigation */
.constraints-tabs {
    display: flex;
    border-bottom: 2px solid #e5e7eb;
    background: #f9fafb;
    padding: 0 2rem;
}

.constraints-tab {
    padding: 1rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: #6b7280;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
    user-select: none;
}

.constraints-tab:hover {
    color: #1f2937;
    background: rgba(59, 130, 246, 0.05);
}

.constraints-tab.active {
    color: #2563eb;
    border-bottom-color: #2563eb;
    background: white;
}

/* Search Box */
.constraints-search-container {
    padding: 1rem 2rem;
    background: white;
    border-bottom: 1px solid #e5e7eb;
}

.constraints-search-box {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.5rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.2s;
    background: white url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%236b7280" stroke-width="2"><circle cx="11" cy="11" r="8"/><path d="m21 21-4.35-4.35"/></svg>') no-repeat 0.75rem center;
}

.constraints-search-box:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.constraints-search-box::placeholder {
    color: #9ca3af;
}

/* Content Area */
.constraints-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 2rem;
}

.constraints-tab-panel {
    display: none;
}

.constraints-tab-panel.active {
    display: block;
}

/* Grid Layout for Cards */
.constraints-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1rem;
}

/* Card Design */
.constraints-card {
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
    position: relative;
}

.constraints-card:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.constraints-card.selected {
    border-color: #2563eb;
    background: #eff6ff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.constraints-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.constraints-card-name {
    font-weight: 600;
    color: #1f2937;
    font-size: 1.05rem;
    flex: 1;
}

.constraints-card-check {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid #d1d5db;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
    margin-left: 0.5rem;
    font-family: Arial, Helvetica, sans-serif !important; /* Never use NotationFont for checkmark */
}

.constraints-card.selected .constraints-card-check {
    background: #2563eb;
    border-color: #2563eb;
}

.constraints-card.selected .constraints-card-check::after {
    content: '';
    display: block;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-2px, -2px);
}

.constraints-card-badges {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.constraints-card-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.badge-pentatonic {
    background: #dbeafe;
    color: #1e40af;
}

.badge-hexatonic {
    background: #fef3c7;
    color: #92400e;
}

.badge-quarter-tone {
    background: #fce7f3;
    color: #9f1239;
}

.badge-variable {
    background: #e0e7ff;
    color: #3730a3;
}

.constraints-card-notes {
    font-family: 'NotationFont', 'Noto Sans', Arial, sans-serif;
    font-size: 1.25rem;
    color: #1f2937;
    padding: 0.5rem 0;
    margin: 0.5rem 0;
    border-top: 1px solid #e5e7eb;
    border-bottom: 1px solid #e5e7eb;
    letter-spacing: 0.5em;
    text-align: center;
    font-weight: normal;
}

.constraints-card-description {
    font-size: 0.875rem;
    color: #6b7280;
    line-height: 1.5;
}

/* Empty State */
.constraints-empty {
    text-align: center;
    padding: 3rem;
    color: #9ca3af;
}

.constraints-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.constraints-empty-text {
    font-size: 1rem;
    font-weight: 500;
}

.constraints-footer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem 2rem;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
}

.constraints-footer-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.constraints-selected {
    font-size: 0.95rem;
    color: #6b7280;
}

.constraints-selected strong {
    color: #1f2937;
    font-weight: 600;
}

.constraints-pitch-system {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.constraints-pitch-label {
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 500;
}

.constraints-pitch-select {
    padding: 0.375rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.875rem;
    background: white;
    color: #1f2937;
    cursor: pointer;
    transition: all 0.2s;
}

.constraints-pitch-select:hover {
    border-color: #9ca3af;
}

.constraints-pitch-select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.constraints-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

.constraints-btn {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid #d1d5db;
    background: white;
    color: #374151;
}

.constraints-btn:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
}

.constraints-btn-secondary {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

.constraints-btn-secondary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .constraints-container {
        width: 95vw;
    }

    .constraints-header h2 {
        font-size: 1.25rem;
    }

    .constraints-list {
        padding: 0 1rem;
    }
}