/* Color Palette & Root Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-700: #374151;
    --gray-900: #1f2937;
}

/* Layout & Typography */
body {
    font-family: 'Source Sans Pro', sans-serif;
    color: var(--gray-700);
    background-color: var(--gray-50);
    line-height: 1.6;
    margin: 0;
    padding: 2rem;
}
#app-container {
    max-width: 1400px;
    margin: 0 auto;
    background-color: white;
    padding: 1.5rem 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
h1, h2, h3, .track-title {
    font-family: 'Montserrat', sans-serif;
    color: var(--gray-900);
    font-weight: 600;
}
h1 { font-size: 2.25rem; border-bottom: 3px solid var(--primary); padding-bottom: 0.5rem; margin-bottom: 1.5rem; }

/* Global Controls */
.global-controls {
    display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2rem; padding: 1rem;
    background-color: var(--primary-light); border-radius: 0.5rem; align-items: center;
    border: 1px solid var(--gray-200);
}
.control-group { display: flex; align-items: center; gap: 0.5rem; }
.control-group label { font-family: 'Montserrat', sans-serif; font-weight: 500; }
.stop-all-button {
    background-color: var(--danger); color: white; padding: 0.5rem 1rem; border: none;
    border-radius: 0.25rem; cursor: pointer; font-family: 'Montserrat', sans-serif;
    font-weight: 500; transition: all 0.2s ease;
}
.stop-all-button:hover { background-color: var(--danger-dark); transform: translateY(-1px); }

/* Track Section */
.track-section {
    margin-bottom: 2rem; border: 1px solid var(--gray-200); border-radius: 0.5rem;
    overflow: hidden; transition: box-shadow 0.3s ease;
}
.track-section:hover { box-shadow: 0 4px 10px rgba(0,0,0,0.07); }
.track-title {
    font-size: 1.3rem; font-weight: 600; margin: 0; padding: 1rem 1.5rem;
    cursor: pointer; position: relative; background-color: #fff; user-select: none;
    border-bottom: 1px solid var(--gray-200);
}
.track-title::after {
    content: '+'; position: absolute; right: 1.5rem; top: 50%;
    transform: translateY(-50%); font-weight: bold; font-size: 1.75rem; color: var(--primary);
}
.track-section:not(.is-collapsed) .track-title::after { content: '−'; }

/* Collapsible Content */
.collapsible-content {
    max-height: 0; overflow: hidden; transition: max-height 0.4s ease-out;
    background-color: var(--gray-50); padding: 0 1.5rem;
}
.track-section:not(.is-collapsed) .collapsible-content {
    max-height: 2000px; padding: 1.5rem; transition: max-height 0.5s ease-in;
}

/* Table */
.comparison-table { width: 100%; border-collapse: separate; border-spacing: 0; margin-top: 1.5rem; }
.comparison-table th, .comparison-table td { padding: 0.75rem; border: 1px solid var(--gray-200); text-align: center; vertical-align: middle; }
.comparison-table th { background-color: var(--gray-100); font-weight: 600; }
.comparison-table td:first-child { font-weight: 600; text-align: left; }
.our-model td { background-color: var(--primary-light) !important; }

/* Player Button */
.player-button {
    background-color: var(--primary); 
    color: white; 
    border: none; 
    border-radius: 0.25rem;
    padding: 0.5rem; 
    cursor: pointer; 
    width: 100px; 
    position: relative;
    transition: all 0.2s ease; 
    font-family: 'Montserrat', sans-serif; 
    font-weight: 500; 
    min-height: 38px;
    font-size: 0.9rem; /* <-- Add this line */
}
.player-button:hover { background-color: var(--primary-dark); transform: translateY(-1px); }
.player-button.playing { background-color: var(--danger); }
.player-button.playing:hover { background-color: var(--danger-dark); }
.player-button.unavailable { background-color: var(--gray-200); color: var(--gray-700); cursor: not-allowed; }
.player-button.unavailable:hover { background-color: var(--gray-200); transform: none; }

/* Waveforms */
.waveform-container { padding: 1rem; background-color: white; border-radius: 0.5rem; border: 1px solid var(--gray-200); }
.waveform-label { font-weight: 600; font-family: 'Montserrat', sans-serif; margin-bottom: 0.5rem; }
.stem-waveform-wrapper { margin-top: 1rem; min-height: 85px; }
  /* Make the track title look clickable for collapsible sections */
.track-title {
cursor: pointer;
position: relative;
padding-right: 25px;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}


.toggle-button {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 0.25rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  }
  .toggle-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
  }

/* Responsive */
@media (max-width: 768px) {
    body { padding: 0.5rem; }
    #app-container { padding: 1rem; }
    .global-controls { flex-direction: column; align-items: flex-start; }
    .player-button { width: 100%; }
}