styles.css

/* Brand color system for VLM Demo */

:root {
    /* Base brand colors */
    --white: rgb(255, 255, 255);
    --black: rgb(0, 0, 0);
    --light-purple: rgb(205, 130, 240);
    --purple: rgb(85, 5, 75);
    --orange: rgb(255, 95, 30);
    
    /* Alpha variations */
    --white-70: rgba(255, 255, 255, 0.7);
    --white-50: rgba(255, 255, 255, 0.5);
    --white-30: rgba(255, 255, 255, 0.3);
    --white-10: rgba(255, 255, 255, 0.1);
    
    --black-70: rgba(0, 0, 0, 0.7);
    --black-50: rgba(0, 0, 0, 0.5);
    --black-30: rgba(0, 0, 0, 0.3);
    --black-10: rgba(0, 0, 0, 0.1);
    
    --light-purple-70: rgba(205, 130, 240, 0.7);
    --light-purple-50: rgba(205, 130, 240, 0.5);
    --light-purple-30: rgba(205, 130, 240, 0.3);
    --light-purple-10: rgba(205, 130, 240, 0.1);
    
    --purple-70: rgba(85, 5, 75, 0.7);
    --purple-50: rgba(85, 5, 75, 0.5);
    --purple-30: rgba(85, 5, 75, 0.3);
    --purple-10: rgba(85, 5, 75, 0.1);
    
    --orange-70: rgba(255, 95, 30, 0.7);
    --orange-50: rgba(255, 95, 30, 0.5);
    --orange-30: rgba(255, 95, 30, 0.3);
    --orange-10: rgba(255, 95, 30, 0.1);
    
    /* Border style controls - change these to customize all dividers */
    --border-style: solid; /* Options: solid, dashed, dotted */
    /* --border-width: 1px; */
    --border-width: 2px;

    --dash-length: 5px; /* Only applies when border-style is dashed */
    
    /* Semantic color assignments */
    --bg-primary: var(--black);
    --bg-secondary: var(--black-70);
    --bg-tertiary: var(--black-50);
    --text-primary: var(--white);
    --text-secondary: var(--white-70);
    /* --border-color: var(--white-30); */
    --border-color: var(--light-purple-30);
    --accent-primary: var(--purple);
    --accent-secondary: var(--light-purple);
    --accent-hover: var(--light-purple);
    --message-user-bg: var(--purple);
    --message-assistant-bg: var(--black-70);
    --input-bg: var(--black-30);
    --input-border: var(--light-purple-30);
    --input-focus: var(--light-purple);
}

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

body {
    font-family: 'Söhne', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 0;
    margin: 0;
    min-height: 100vh;
}

.app-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Top Navigation Bar */
.top-nav {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-secondary);
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
    padding: 24px 24px;
}

.nav-left {
    display: flex;
    align-items: baseline;
    gap: 12px;
    z-index: 1;
}

.nav-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.nav-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
}

.nav-logo-img {
    height: 24px;
    width: auto;
}

.nav-logo-link {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
    display: inline-block;
    line-height: 1;
}

.nav-logo-link:hover {
    color: var(--light-purple);
}

.model-status {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
}

.loading-progress {
    width: 100%;
    max-width: 300px;
    margin: 8px 0;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--white-10);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--light-purple), var(--orange));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
    text-align: center;
}

.model-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.model-input {
    flex: 1;
    padding: 6px 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-primary);
    font-family: inherit;
    min-width: 0;
}

select.model-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

select.model-input option {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.model-input:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px var(--light-purple-10);
}

.model-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.cache-info {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.container {
    flex: 1;
    background-color: var(--bg-primary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.mode-container {
    display: none;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.mode-container.active {
    display: flex;
}

/* Live Caption Mode Styles */
#live-caption-mode.active {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    padding: 32px;
    gap: 24px;
    background-color: var(--bg-primary);
}

.live-caption-content {
    flex: 1;
    display: flex;
    gap: 24px;
    min-height: 0;
}

.live-caption-video-section {
    flex: 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
    min-width: 0;
}

/* Safari: aspect-ratio on container causes incorrect width calculation */
.is-safari .live-caption-video-container {
    aspect-ratio: auto;
    width: 100%;
}


.live-caption-video-container {
    position: relative;
    aspect-ratio: 1;
    height: 100%;
    max-height: calc(100vh - 220px);
    border: 2px solid var(--light-purple-30);
    border-radius: 12px;
    background-color: var(--black-50);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

#live-caption-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: var(--black);
    transform: scaleX(-1); /* Mirror the video horizontally */
}

/* Capture Overlay (on video) */
.capture-overlay {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    border-radius: 8px;
    z-index: 10;
    min-width: 100px;
}

.capture-overlay .control-btn {
    padding: 8px 16px;
    font-size: 14px;
    width: 100%;
}

.capture-overlay .control-select {
    padding: 6px 10px;
    padding-right: 24px;
    font-size: 14px;
    background-position: right 6px center;
}

.overlay-field {
    display: flex;
    align-items: center;
    gap: 8px;
}

.overlay-label {
    font-size: 14px;
    color: var(--white-70);
    white-space: nowrap;
}

.capture-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.capture-overlay .status-text {
    font-size: 14px;
    color: var(--white-70);
}

/* Controls Bar */
.controls-bar {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px 16px;
    background-color: var(--black-50);
    border: 1px solid var(--light-purple-30);
    border-radius: 12px;
}

.controls-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.controls-row.status-row {
    gap: 12px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-label {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.control-btn {
    padding: 8px 16px;
    background-color: var(--light-purple-30);
    border: 1px solid var(--light-purple-50);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.control-btn:hover:not(:disabled) {
    background-color: var(--light-purple-50);
    border-color: var(--light-purple);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.control-btn.primary {
    background: linear-gradient(135deg, var(--purple) 0%, var(--light-purple) 100%);
    border: none;
    color: white;
    padding: 8px 20px;
}

.control-btn.primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--purple-50);
}

.control-btn.primary.stop {
    background: linear-gradient(135deg, var(--orange) 0%, var(--orange-70) 100%);
}

.control-btn.small {
    padding: 6px 12px;
    font-size: 12px;
}

.control-select {
    padding: 8px 12px;
    padding-right: 28px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
}

.control-select:focus {
    outline: none;
    border-color: var(--input-focus);
}

.control-select option {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.control-select.model-select {
    min-width: 140px;
}

.status-text {
    font-size: 13px;
    color: var(--text-secondary);
    min-width: 40px;
}

/* Progress Bar (inline in status row) */
.progress-bar-row {
    flex: 1;
    max-width: 200px;
    height: 4px;
    background: var(--white-10);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-row .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--light-purple), var(--orange));
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* Indeterminate progress animation for large downloads */
.progress-bar-row.indeterminate .progress-fill {
    width: 30% !important;
    animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(400%); }
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-secondary);
}

.status-indicator.active {
    background-color: var(--light-purple);
    box-shadow: 0 0 8px var(--light-purple);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.live-caption-text-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
    padding: 20px;
    background-color: var(--black-50);
    border: 1px solid var(--light-purple-30);
    border-radius: 12px;
}

.caption-section-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--light-purple-30);
}

.latest-caption {
    font-size: 20px;
    font-weight: 500;
    color: var(--white);
    line-height: 1.4;
    padding: 12px;
    background-color: var(--black-30);
    border-radius: 8px;
    border-left: 3px solid var(--light-purple);
}

.caption-history {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
}

.caption-history-item {
    display: flex;
    gap: 12px;
    padding: 12px 16px;
    background-color: var(--black-30);
    border-radius: 8px;
    border: 1px solid var(--light-purple-30);
    border-left: 3px solid transparent;
    transition: opacity 0.3s ease, border-color 0.3s ease;
}

.caption-history-item.latest {
    border-left-color: var(--light-purple);
    background-color: var(--black-50);
}

.caption-timestamp {
    font-size: 11px;
    color: var(--text-secondary);
    flex-shrink: 0;
    font-family: 'JetBrains Mono', monospace;
    opacity: 0.7;
}

.caption-text {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.4;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .live-caption-content {
        flex-direction: column;
    }

    .live-caption-video-section,
    .live-caption-text-section {
        flex: none;
        width: 100%;
    }

    .live-caption-text-section {
        max-height: 300px;
    }
}

@media (max-width: 768px) {
    .top-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 12px 16px;
    }

    .nav-left,
    .nav-center {
        width: 100%;
    }

    .nav-center {
        position: static;
        transform: none;
        align-items: flex-start;
    }

    .nav-subtitle {
        text-align: left;
        font-size: 14px;
    }

    .model-status {
        max-width: 100%;
    }

    .model-input-wrapper {
        width: 100%;
    }

    #live-caption-mode.active {
        padding: 16px;
        gap: 16px;
    }

    .live-caption-video-container {
        min-height: 200px;
    }

    .live-caption-text-section {
        padding: 16px;
    }

    .latest-caption {
        font-size: 20px;
        padding: 12px;
    }

    /* Controls bar mobile layout */
    .controls-bar {
        padding: 12px;
    }

    .controls-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .control-group {
        flex-wrap: wrap;
        width: 100%;
    }

    .control-group.model-group {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .control-group.model-group .control-label {
        margin-bottom: 4px;
    }

    .control-group.model-group .control-select {
        width: 100%;
        min-width: auto;
    }

    .control-group.model-group .control-btn {
        width: 100%;
        padding: 12px 16px;
    }

    .control-group.cache-group {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    /* Allow scrolling on mobile */
    .app-layout {
        overflow-y: auto;
        overflow-x: hidden;
    }

    .container {
        overflow-y: auto;
        overflow-x: hidden;
    }

    #live-caption-mode.active {
        overflow-y: auto;
        min-height: auto;
        height: auto;
    }

    .live-caption-content {
        min-height: auto;
    }

    .live-caption-video-section {
        flex-shrink: 0;
    }
}


/* Smooth transitions */
.mode-container {
    transition: opacity 0.2s ease;
}

/* Scrollbar styling for webkit browsers */
.caption-history::-webkit-scrollbar {
    width: 6px;
}

.caption-history::-webkit-scrollbar-track {
    background: var(--black-30);
}

.caption-history::-webkit-scrollbar-thumb {
    background: var(--light-purple-50);
    border-radius: 3px;
}

.caption-history::-webkit-scrollbar-thumb:hover {
    background: var(--light-purple);
}

/* Loading states */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 0%,
        var(--bg-secondary) 50%,
        var(--bg-tertiary) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Focus visible for accessibility */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--light-purple);
    outline-offset: 2px;
}

/* Ensure proper text rendering */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}


/* High contrast improvements */
@media (prefers-contrast: high) {
    button:not(:disabled) {
        border: 2px solid var(--light-purple);
    }
}

/* ===================================
   LOADING SCREEN / WELCOME PAGE
   =================================== */

   .loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--black);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-y: auto;
    overflow-x: hidden;
}

.loading-screen.hidden {
    display: none;
}

.loading-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.loading-vignette {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    z-index: 2;
}

.loading-content {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    max-width: 800px;
    width: 100%;
    text-align: center;
    color: var(--white);
    margin: auto;
}

.loading-header {
    margin-bottom: 2rem;
}

.loading-logo {
    height: 60px;
    width: auto;
    margin-bottom: 1rem;
}

.loading-title-section {
    margin-bottom: 2rem;
}

.loading-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin: 0 0 0.5rem 0;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.loading-subtitle {
    font-size: 1.25rem;
    color: var(--white-70);
    margin: 0;
    font-weight: 400;
}

.loading-description {
    margin-bottom: 3rem;
    max-width: 600px;
}

.loading-description p {
    font-size: 1rem;
    color: var(--white-70);
    line-height: 1.6;
    margin: 0 0 1rem 0;
}

.loading-description p:last-child {
    margin-bottom: 0;
}

.loading-action-section {
    margin-bottom: 2rem;
}

.loading-explore-button {
    padding: 16px 48px;
    background: linear-gradient(135deg, var(--purple) 0%, var(--light-purple) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px var(--purple-50);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 200px;
    justify-content: center;
}

.loading-explore-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px var(--purple-70);
    background: linear-gradient(135deg, var(--light-purple) 0%, var(--purple) 100%);
}

.loading-explore-button:active:not(:disabled) {
    transform: translateY(0);
}

.loading-explore-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--white-30);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-progress-text {
    font-size: 0.875rem;
    color: var(--white-70);
    font-weight: 500;
}

.loading-error {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--black-70);
    border: 1px solid var(--orange-50);
    border-radius: 8px;
    max-width: 500px;
}

.loading-error p {
    color: var(--orange);
    margin: 0 0 1rem 0;
    font-size: 0.95rem;
}

.loading-retry-button {
    padding: 10px 24px;
    background-color: var(--orange);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.loading-retry-button:hover {
    background-color: var(--orange-70);
    transform: translateY(-1px);
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .loading-screen {
        align-items: flex-start;
    }

    .loading-content {
        padding: 2rem 1.5rem;
        min-height: 100%;
        justify-content: flex-start;
        padding-top: 3rem;
    }

    .loading-title {
        font-size: 1.75rem;
    }

    .loading-subtitle {
        font-size: 1rem;
    }

    .loading-description p {
        font-size: 0.9rem;
    }

    .loading-explore-button {
        padding: 14px 36px;
        font-size: 1rem;
        min-width: 180px;
    }
}

/* Mobile Warning */
.mobile-warning {
    margin-bottom: 1.5rem;
    padding: 1rem 1.5rem;
    background-color: rgba(255, 95, 30, 0.15);
    border: 1px solid var(--orange-50);
    border-radius: 8px;
    max-width: 400px;
}

.mobile-warning-title {
    color: var(--orange);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.mobile-warning-title svg {
    flex-shrink: 0;
}

.mobile-warning p {
    color: var(--white-70);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 0 0 0.5rem 0;
    text-align: center;
}

.mobile-warning p:last-child {
    margin-bottom: 0;
}

/* Safari Warning */
.safari-warning {
    margin-bottom: 1.5rem;
    padding: 1rem 1.5rem;
    background-color: rgba(205, 130, 240, 0.15);
    border: 1px solid var(--light-purple-50);
    border-radius: 8px;
    max-width: 500px;
}

.safari-warning-title {
    color: var(--light-purple);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.safari-warning-title svg {
    flex-shrink: 0;
}

.safari-warning p {
    color: var(--white-70);
    font-size: 0.85rem;
    line-height: 1.5;
    margin: 0 0 0.5rem 0;
    text-align: center;
}

.safari-warning p:last-child {
    margin-bottom: 0;
}

.safari-warning a {
    color: var(--light-purple);
    text-decoration: underline;
}

.safari-warning a:hover {
    color: var(--white);
}