:root {
    /* Light Mode Theme */
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --muted-text: #64748b;
    --success: #22c55e;
    --error: #ef4444;
}

[data-theme="dark"] {
    /* Dark Mode Theme */
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --card-bg: #1e293b;
    --border-color: #334155;
    --muted-text: #94a3b8;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(1rem, 5vw, 2rem) 1rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.header-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-title i {
    color: #ef4444;
}

nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    color: var(--muted-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover,
nav a.active {
    color: var(--primary-color);
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.05);
    margin-bottom: 1.5rem;
}

/* Form Elements */
select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem !important;
}

input[type="text"],
input[type="url"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group .text-muted {
    font-size: 0.8rem;
    color: var(--muted-text);
    margin-top: 0.5rem;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Animated Search Bar States */
.search-transition {
    transition: flex 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), min-width 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), width 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.form-loading #url-container {
    flex: 1.5 !important;
    min-width: 150px !important;
}

.form-loading #btn-container {
    flex: 3 !important;
    min-width: 280px !important;
}

.form-loading #status-container {
    width: 200px !important;
    min-width: 200px !important;
}


.summary-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Live Preview Component */
.live-preview {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 0.75rem 1rem;
    margin-top: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px dashed var(--border-color);
    border-radius: 14px;
    animation: fadeInSlide 0.3s ease;
}

.live-preview-thumbnail-container {
    position: relative;
    display: inline-block;
    flex-shrink: 0;
    width: 100px;
    height: 56px;
}

.live-preview-thumbnail-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.live-preview-info {
    flex: 1;
    min-width: 0;
}

.live-preview-title {
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.2rem;
}

.live-preview-channel {
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 600;
}

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.summary-title {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    margin-bottom: 0.75rem;
    line-height: 1.25;
    font-weight: 800;
    color: var(--text-color);
}

.summary-meta {
    margin-bottom: 1.25rem;
    column-gap: 1.5rem;
    row-gap: 0.6rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    color: var(--muted-text);
    font-size: 0.9rem;
}

.summary-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.summary-meta i {
    width: 16px;
    height: 16px;
}

.youtube-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.badge-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.summary-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    gap: 0.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn i {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.btn:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    gap: 0.5rem;
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.btn-secondary i {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}

.btn-secondary:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-danger {
    background-color: transparent;
    color: var(--muted-text);
    border: 1px solid var(--border-color);
}

.btn-danger:hover {
    background-color: var(--error);
    color: white;
    border-color: var(--error);
}

.btn-small {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
    height: 40px;
}

.btn-small i {
    width: 16px;
    height: 16px;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--muted-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.btn-icon:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-color);
}

[data-theme="dark"] .btn-icon:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.badge {
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    background: var(--border-color);
    color: var(--muted-text);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge i {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.model-badge {
    background: rgba(0, 0, 0, 0.04);
    text-transform: none;
    border: 1px solid var(--border-color);
    color: var(--muted-text);
}

[data-theme="dark"] .model-badge {
    background: rgba(255, 255, 255, 0.05);
}

.summary-result-layout {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.summary-result-thumbnail {
    width: 200px;
    flex-shrink: 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    position: relative;
}

.summary-result-thumbnail img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    display: block;
}

.summary-result-layout .summary-header {
    margin-bottom: 0.5rem;
}

.summary-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    /* More gap between items, less between lines */
    font-size: 0.85rem;
    color: var(--muted-text);
    margin-top: 0.5rem;
}

.summary-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Markdown/Prose Styles */
.prose {
    color: var(--text-color);
    line-height: 1.7;
}

.prose h1,
.prose h2,
.prose h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.prose h1 {
    font-size: 1.5rem;
}

.prose h2 {
    font-size: 1.3rem;
}

.prose h3 {
    font-size: 1.15rem;
}

.prose p {
    margin-bottom: 1rem;
}

.prose ul,
.prose ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.prose li {
    margin-bottom: 0.5rem;
}

.prose strong {
    font-weight: 700;
}

.prose a {
    color: var(--primary-color);
    text-decoration: none;
}

.prose a:hover {
    text-decoration: underline;
}

.prose table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 1.5rem 0;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.prose th,
.prose td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    text-align: left;
}

.prose th:last-child,
.prose td:last-child {
    border-right: none;
}

.prose tr:last-child td {
    border-bottom: none;
}

.prose th {
    background-color: var(--bg-color);
    color: var(--muted-text);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.prose tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] .prose tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .prose th {
    background-color: rgba(255, 255, 255, 0.05);
}

.resummarize-box {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.resummarize-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#resummarize-preset {
    flex: 1;
    max-width: 300px;
}

#toggle-chat-btn {
    width: auto;
    border-style: solid;
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 700;
    background: transparent;
    transition: all 0.2s;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
}

#toggle-chat-btn i {
    width: 18px;
    height: 18px;
}

#toggle-chat-btn:hover {
    background-color: rgba(59, 130, 246, 0.1);
}

/* Chat UI Styling - Improved Floating Design */
.chat-container {
    display: none;
    flex-direction: column;
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 380px;
    height: 500px;
    max-height: calc(100vh - 48px);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    overflow: hidden;
    animation: slideUp 0.3s ease-out;
}

.status-anim-text.exit {
    transform: translateY(-10px);
    opacity: 0;
}

/* Typing Indicator */
.typing-line {
    display: inline-block;
    width: 3px;
    height: 18px;
    background-color: var(--primary-color);
    margin-left: 4px;
    animation: blink 1s step-end infinite;
    vertical-align: middle;
}

@keyframes blink {

    from,
    to {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

.streaming-status {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.streaming-status .dot {
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.2);
        opacity: 0.5;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.chat-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header-icon {
    width: 20px;
    height: 20px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background-color: var(--bg-color);
    /* Light gray/dark background for message area */
}

.message {
    max-width: 85%;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    line-height: 1.5;
    font-size: 0.95rem;
}

.message.assistant {
    align-self: flex-start;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
}

.message.user {
    align-self: flex-end;
    background-color: var(--primary-color);
    color: white;
}

.chat-input-container {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.75rem;
}

.chat-input-container input {
    flex: 1;
}

.chat-input-container button {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.hidden {
    display: none !important;
}

.flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.items-center {
    align-items: center;
}

.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 0.5rem;
}

.mt-4 {
    margin-top: 1rem;
}

.mt-8 {
    margin-top: 2rem;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 0.75rem;
}

.history-list .card {
    margin-bottom: 0;
    padding: 1rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px !important;
}

/* History Elements */
.history-item {
    display: flex;
    text-decoration: none;
    color: inherit;
    gap: 1.5rem;
    align-items: stretch;
    /* Stretch to fill card height for consistent border lines */
}

.history-thumbnail {
    flex-shrink: 0;
    width: 140px;
    height: calc(140px * 9 / 16);
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--bg-color);
}

/* Grayscale for Read Status (Unread is Color) */
.history-thumbnail img,
.summary-result-thumbnail img {
    filter: grayscale(100%);
    opacity: 0.8;
    transition: filter 0.5s ease, opacity 0.5s ease;
}

.history-thumbnail.is-unread img,
.summary-result-thumbnail.is-unread img {
    filter: none;
    opacity: 1;
}

.history-thumbnail:hover img,
.summary-result-thumbnail:hover img {
    filter: none;
    opacity: 1;
}

/* Standardized Duration Badge - Fixed Pinning */
.history-thumbnail .badge,
.summary-result-thumbnail .badge,
.live-preview-thumbnail-container .badge {
    position: absolute !important;
    bottom: 6px !important;
    right: 6px !important;
    left: auto !important;
    top: auto !important;
    z-index: 5;
    background: rgba(0, 0, 0, 0.8) !important;
    backdrop-filter: blur(4px);
    color: white !important;
    padding: 2px 6px !important;
    font-size: 0.75rem !important;
    font-weight: 700 !important;
    border-radius: 4px !important;
    line-height: 1 !important;
    pointer-events: none;
    border: none !important;
}

.history-delete-btn {
    position: absolute;
    right: 1.5rem;
    top: 1rem;
    padding: 0.4rem;
    border-radius: 6px;
    z-index: 10;
    width: 32px;
    height: 32px;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.2s ease, background-color 0.2s;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: none;
    cursor: pointer;
}

.history-delete-btn i {
    width: 16px;
    height: 16px;
}

.history-container:hover .history-delete-btn {
    opacity: 1;
    pointer-events: auto;
}

.history-delete-btn:hover {
    background-color: #ef4444;
    color: white;
}

/* Inline Delete Confirmation */
.history-delete-btn.confirming {
    background-color: #ef4444 !important;
    color: white !important;
    animation: pulse-red 1s infinite;
    opacity: 1 !important;
    pointer-events: auto !important;
}

@keyframes pulse-red {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.history-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.history-title {
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 1.3;
}

.history-meta {
    display: flex;
    flex-direction: column;
    /* Stacked below channel name in list view */
    gap: 0.3rem;
    font-size: 0.85rem;
    color: var(--muted-text);
    align-items: flex-start;
}

.history-meta svg,
.history-meta i {
    width: 14px !important;
    height: 14px !important;
    stroke-width: 2.5px;
    vertical-align: middle;
    margin-top: -2px;
}

.history-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
}

/* Consolidated History Excerpt Styling */
.history-excerpt {
    flex: 2;
    font-size: 0.775rem;
    color: var(--muted-text);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    border-left: 2px solid var(--border-color) !important;
    padding-left: 1.25rem;
    align-self: stretch;
    line-height: 1.6;
    opacity: 0.9;
}

/* Fix "broken newlines" by adding delicate separators between flattened blocks */
.history-excerpt.markdown-content :not(.history-excerpt) {
    margin: 0 !important;
    padding: 0 !important;
}

.history-excerpt.markdown-content {
    display: inline !important;
    /* Keep the clamp container as inline-block/block for the -webkit-box logic */
    display: -webkit-box !important;
    margin: 0 !important;
    font-size: inherit !important;
    font-weight: inherit !important;
    color: inherit !important;
}

.history-excerpt.markdown-content * {
    display: inline !important;
    font-size: inherit !important;
    font-weight: inherit !important;
    color: inherit !important;
    margin: 0 !important;
    padding: 0 !important;
}

.history-excerpt.markdown-content strong,
.history-excerpt.markdown-content b {
    font-weight: 700 !important;
}

.history-excerpt.markdown-content>*+*::before {
    content: " • ";
    font-weight: 900;
    color: var(--primary-color);
    margin: 0 6px !important;
    opacity: 0.5;
}

.history-excerpt li::before {
    content: " • ";
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 2px !important;
}

.history-excerpt li:first-child::before {
    content: "";
}

.history-excerpt code {
    background: rgba(128, 128, 128, 0.1) !important;
    padding: 0 3px !important;
    border-radius: 4px !important;
    font-family: monospace;
    font-size: 0.9em !important;
}

.history-thumbnail img {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 6px;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

/* Mobile Fixes */
@media (max-width: 768px) {
    .container {
        padding: 1rem 0.75rem;
    }

    header {
        flex-direction: column;
        align-items: center;
        gap: 1.25rem;
        text-align: center;
    }

    .summary-header {
        flex-direction: column;
        align-items: stretch;
    }

    .summary-actions {
        order: -1;
        justify-content: flex-end;
        margin-bottom: 0.5rem;
    }

    .resummarize-box {
        flex-direction: column;
        align-items: stretch;
        padding: 1.25rem;
        gap: 1rem;
    }

    .resummarize-controls {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .history-item {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .history-excerpt {
        border-left: none !important;
        padding-left: 0 !important;
        margin-top: 0.5rem;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }

    #toggle-chat-btn {
        width: 100%;
    }

    .history-thumbnail {
        width: 100%;
    }

    .summary-result-layout {
        flex-direction: column;
        gap: 1rem;
    }

    .summary-result-thumbnail {
        width: 100%;
    }
}

/* --- Progress Status Animations --- */
.status-anim-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: 1.5rem;
    min-width: 200px;
    overflow: hidden;
    pointer-events: none;
}

.status-anim-text {
    position: absolute;
    left: 0;
    width: 100%;
    text-align: left;
    white-space: nowrap;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.status-anim-text.active {
    opacity: 1;
    transform: translateY(0);
}

.status-anim-text.exit {
    opacity: 0;
    transform: translateY(-100%);
}