:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-color: #0c111c;
    --card-bg: #1e293b;
    --card-bg-hover: #233045;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --scroll-thumb: #475569;
    
    --speaker-0-bg: rgba(99, 102, 241, 0.15);
    --speaker-0-border: rgba(99, 102, 241, 0.5);
    --speaker-0-text: #818cf8;
    
    --speaker-1-bg: rgba(236, 72, 153, 0.15);
    --speaker-1-border: rgba(236, 72, 153, 0.5);
    --speaker-1-text: #f472b6;

    --speaker-2-bg: rgba(16, 185, 129, 0.15);
    --speaker-2-border: rgba(16, 185, 129, 0.5);
    --speaker-2-text: #34d399;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.05), transparent 50%);
}

.app-header {
    text-align: center;
    padding: 1.5rem 0;
    flex-shrink: 0;
    animation: fadeInDown 0.6s ease-out;
}

.app-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #a855f7, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.app-main {
    display: flex;
    flex: 1;
    overflow: hidden; /* prevents stretching */
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    gap: 2rem;
    padding: 0 2rem 2rem 2rem;
}

/* Left Panel - Upload Zone */
.left-panel {
    flex: 0 0 380px;
    display: flex;
    flex-direction: column;
    animation: fadeInLeft 0.6s ease-out;
}

.upload-section {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.drop-zone {
    border: 2px dashed rgba(99, 102, 241, 0.4);
    border-radius: 12px;
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(15, 23, 42, 0.4);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.08);
    transform: translateY(-2px);
}

.upload-icon {
    color: var(--primary-color);
    margin-bottom: 1.25rem;
    transition: transform 0.3s ease;
}

.drop-zone:hover .upload-icon {
    transform: translateY(-5px);
}

.drop-zone-prompt {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.browse-text {
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.browse-text:hover {
    color: var(--primary-hover);
}

.drop-zone-sub {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 1rem;
}

.status-panel {
    text-align: center;
    padding: 2rem 1rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(99, 102, 241, 0.15);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    animation: spin 1s linear infinite;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

.status-subtext {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: block;
    margin-top: 0.5rem;
}

/* Right Panel - Results */
.right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: fadeInRight 0.6s ease-out;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.3);
    flex-shrink: 0;
}

.results-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.badge {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.scrollable-area {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    position: relative;
    
    /* Elegant scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--scroll-thumb) transparent;
}

.scrollable-area::-webkit-scrollbar {
    width: 6px;
}
.scrollable-area::-webkit-scrollbar-track {
    background: transparent;
}
.scrollable-area::-webkit-scrollbar-thumb {
    background-color: var(--scroll-thumb);
    border-radius: 20px;
}

.placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
    animation: fadeIn 1s ease-in-out;
}

.placeholder-icon {
    opacity: 0.3;
    margin-bottom: 1rem;
}

.placeholder p {
    font-size: 1.1rem;
    font-weight: 500;
    color: #cbd5e1;
    margin-bottom: 0.25rem;
}

.placeholder span {
    font-size: 0.9rem;
    max-width: 300px;
}

.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.timeline-entry {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    border-left: 4px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
    position: relative;
}

.timeline-entry:hover {
    transform: translateY(-2px);
    background-color: var(--card-bg-hover);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.timeline-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.speaker-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
    border: 1px solid;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.time-badge {
    color: var(--text-secondary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    background: rgba(0,0,0,0.25);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.transcript-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.hidden {
    display: none !important;
}

/* Speaker specifics dynamically assigned via classes */
.speaker-color-0 { border-left-color: var(--speaker-0-text); }
.speaker-color-0 .speaker-badge {
    color: var(--speaker-0-text);
    background-color: var(--speaker-0-bg);
    border-color: var(--speaker-0-border);
}

.speaker-color-1 { border-left-color: var(--speaker-1-text); }
.speaker-color-1 .speaker-badge {
    color: var(--speaker-1-text);
    background-color: var(--speaker-1-bg);
    border-color: var(--speaker-1-border);
}

.speaker-color-2 { border-left-color: var(--speaker-2-text); }
.speaker-color-2 .speaker-badge {
    color: var(--speaker-2-text);
    background-color: var(--speaker-2-bg);
    border-color: var(--speaker-2-border);
}

/* Options Section */
.options-section {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.options-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.options-header label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.mode-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background-color: rgba(15, 23, 42, 0.6);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

.mode-select:focus {
    border-color: var(--primary-color);
}

.tooltip-icon {
    position: relative;
    color: var(--text-secondary);
    cursor: help;
    display: flex;
}

.tooltip-icon:hover {
    color: var(--primary-color);
}

.tooltip-icon::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background-color: #000;
    color: #fff;
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: normal;
    width: max-content;
    max-width: 250px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    text-align: center;
    line-height: 1.4;
    pointer-events: none;
}

.tooltip-icon:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes spin { 100% { transform: rotate(360deg); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInLeft { from { opacity: 0; transform: translateX(-30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeInRight { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Responsive adjustments */
@media (max-width: 900px) {
    .app-main {
        flex-direction: column;
        overflow-y: auto; /* Allow scrolling on small screens */
    }
    
    .left-panel {
        flex: none;
        height: auto;
    }
    
    .right-panel {
        flex: none;
        min-height: 500px; /* Give it some height */
    }
    
    body {
        overflow: auto; /* Reset body for mobile */
    }
    
    .page-wrapper {
        height: auto;
        min-height: 100vh;
    }
}