:root {
    --primary-color: oklch(62% 0.18 280);      
    --primary-hover: oklch(58% 0.20 280);      
    --accent-color: oklch(70% 0.15 240);       
    --error-color: oklch(65% 0.22 25);         

    --primary-glow: oklch(62% 0.18 280 / 0.35);
    --primary-active-bg: oklch(35% 0.1 280);

    --text-primary: oklch(92% 0.01 280);
    --text-secondary: oklch(70% 0.02 280);
    --text-muted: oklch(55% 0.02 280);

    --surface-bg: oklch(18% 0.015 280);
    --surface-1: oklch(22% 0.018 280);
    --surface-2: oklch(26% 0.02 280);
    --surface-3: oklch(30% 0.022 280);

    --border-color: oklch(34% 0.02 280);

    --sidebar-width: 280px;
    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@layer reset, layout, components, utilities;

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

    body {
        font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        line-height: 1.6;
        background-color: var(--surface-bg);
        color: var(--text-primary);
        overflow: hidden;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        color-scheme: dark;
    }

    input,
    textarea,
    button,
    select {
        font-family: inherit;
        font-size: 1rem;
    }

    h1,
    h2,
    h3,
    h4 {
        font-weight: 600;
        letter-spacing: -0.02em;
    }

    ::-webkit-scrollbar {
        width: 10px;
        height: 10px;
    }

    ::-webkit-scrollbar-track {
        background: transparent;
    }

    ::-webkit-scrollbar-thumb {
        background: var(--surface-3);
        border-radius: 5px;
        border: 2px solid var(--surface-bg);
    }

    ::-webkit-scrollbar-thumb:hover {
        background: var(--border-color);
    }

    ::selection {
        background-color: var(--primary-active-bg);
        color: var(--text-primary);
    }
}

@layer layout {
    .app-container {
        display: flex;
        height: 100vh;
    }

    #sidebar {
        width: var(--sidebar-width);
        background-color: var(--surface-1);
        border-right: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
        padding: 1.5rem;
    }

    #main-content {
        flex-grow: 1;
        padding: 0 4rem;
        overflow-y: auto;
        display: flex;
        justify-content: center;


        align-items: flex-start;
    }

    #welcome-view,
    #summary-view {
        width: 100%;
        max-width: 70ch;

        margin-top: 3rem;
        margin-bottom: 3rem;
    }

    #welcome-view header {
        text-align: center;
        margin-bottom: 3rem;
    }

    #welcome-view header h1 {
        font-size: 3rem;
        font-weight: 700;
        margin-bottom: 0.75rem;
        background: linear-gradient(120deg, var(--accent-color) 0%, var(--primary-color) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    #welcome-view header p {
        color: var(--text-secondary);
        font-size: 1.125rem;
        max-width: 550px;
        margin-left: auto;
        margin-right: auto;
        line-height: 1.7;
    }

    #summary-form {
        display: flex;
        gap: 0.75rem;
        margin-bottom: 2rem;
    }
}

@layer components {
    #new-summary-btn {
        width: 100%;
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
        font-weight: 600;
        background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
        color: white;
        border: none;
        border-radius: var(--border-radius-md);
        cursor: pointer;
        transition: var(--transition-fast);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        box-shadow: 0 4px 15px -5px var(--primary-glow, rgba(159, 64, 245, 0.4));
    }

    #new-summary-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px -5px var(--primary-glow, rgba(159, 64, 245, 0.5));
    }

    #saved-summaries-section {
        flex-grow: 1;
        overflow-y: auto;
        margin: 2rem -0.5rem 0;
    }

    #saved-summaries-section h2 {
        font-size: 0.75rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: var(--text-muted);
        margin-bottom: 1rem;
        padding: 0 1.25rem;
    }

    #saved-summaries-list li {
        display: flex;
        align-items: center;
        margin: 0.25rem 0.5rem;
        border-radius: var(--border-radius-md);
        transition: var(--transition-fast);
        position: relative;
    }

    #saved-summaries-list li a {
        display: flex;
        align-items: center;
        padding: 0.75rem 2.5rem 0.75rem 1.25rem;
        color: var(--text-secondary);
        text-decoration: none;
        white-space: nowrap;
        overflow: hidden;
        transition: var(--transition-fast);
        font-weight: 500;
        font-size: 0.9rem;
        gap: 0.75rem;
        flex-grow: 1;


        mask-image: linear-gradient(to right, black 80%, transparent 90%);
        -webkit-mask-image: linear-gradient(to right, black 80%, transparent 90%);
    }

    #saved-summaries-list li:hover:not(.active) {
        background-color: var(--surface-2);
    }

    #saved-summaries-list li:hover:not(.active) a {
        color: var(--text-primary);
    }

    #saved-summaries-list li.active {
        background-color: var(--primary-active-bg);
        box-shadow: 0 0 15px -5px var(--primary-glow);
    }

    #saved-summaries-list li.active a {
        color: var(--text-primary);
        font-weight: 600;
    }

    .delete-summary-btn {
        position: absolute;
        top: 50%;
        right: 0.5rem;
        transform: translateY(-50%);
        flex-shrink: 0;
        background: transparent;
        border: none;
        color: var(--text-muted);
        cursor: pointer;
        padding: 0.5rem;
        border-radius: var(--border-radius-sm);
        transition: var(--transition-fast);
        font-size: 0.85rem;
        line-height: 1;
        opacity: 0;
        pointer-events: none;
    }


    #saved-summaries-list li:hover .delete-summary-btn {
        opacity: 0.8;
        pointer-events: auto;
        color: var(--error-color);
    }

    .delete-summary-btn:hover {
        opacity: 1;
        background-color: oklch(65% 0.22 25 / 0.15);
    }

    .icon-btn {
        flex-shrink: 0;
        background: transparent;
        border: none;
        color: var(--text-muted);
        cursor: pointer;
        padding: 0.5rem;
        border-radius: var(--border-radius-sm);
        transition: var(--transition-fast);
        font-size: 0.95rem;
        line-height: 1;
    }

    .icon-btn:hover {
        color: var(--text-primary);
        background-color: var(--surface-3);
    }

    .sidebar-footer {
        margin-top: 1.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--border-color);
    }

    #clear-summaries-btn {
        width: 100%;
        padding: 0.75rem;
        font-size: 0.9rem;
        font-weight: 500;
        background: transparent;
        color: var(--text-muted);
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-md);
        cursor: pointer;
        transition: var(--transition-fast);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }

    #clear-summaries-btn:hover {
        background: oklch(65% 0.25 25 / 0.1);
        color: var(--error-color);
        border-color: oklch(65% 0.25 25 / 0.5);
    }

    #summary-form input[type="url"] {
        flex-grow: 1;
        font-size: 1rem;
        border-radius: var(--border-radius-md);
        background-color: var(--surface-2);
        color: var(--text-primary);
        padding: 0.9rem 1rem 0.9rem 2.75rem;
        transition: var(--transition-fast);
        border: 1px solid var(--border-color);
        outline: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23817e90' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71'/%3E%3Cpath d='M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: 0.8rem center;
    }

    #summary-form input[type="url"]:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px var(--primary-glow, rgba(159, 64, 245, 0.3));
    }

    #summary-form button {
        background-color: var(--primary-color);
        color: white;
        font-weight: 600;
        border: none;
        cursor: pointer;
        padding: 0.9rem 1.5rem;
        border-radius: var(--border-radius-md);
        transition: var(--transition-fast);
    }

    #summary-form button:hover {
        background-color: var(--primary-hover);
        transform: translateY(-1px);
    }

    .settings-details {
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-lg);
        background: var(--surface-1);
        margin-top: 2rem;
        overflow: hidden;
    }

    .settings-details summary {
        padding: 1.25rem;
        cursor: pointer;
        font-weight: 500;
        display: flex;
        align-items: center;
        gap: 0.625rem;
        list-style: none;
        transition: var(--transition-fast);
    }

    .settings-details summary:hover {
        background-color: var(--surface-2);
    }

    .settings-details summary::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        margin-left: auto;
        transition: transform 0.3s ease;
        font-size: 0.8rem;
        color: var(--text-muted);
    }

    .settings-details[open]>summary {
        border-bottom: 1px solid var(--border-color);
    }

    .settings-details[open] summary::after {
        transform: rotate(180deg);
    }

    .settings-content {
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .settings-content>div {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .settings-content input[type="text"],
    .settings-content input[type="password"],
    .settings-content textarea {
        width: 100%;
        font-size: 0.95rem;
        background-color: var(--surface-2);
        color: var(--text-primary);
        padding: 0.75rem 1rem;
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-md);
        transition: var(--transition-fast);
        outline: none;
    }

    .settings-content input[type="text"]:focus,
    .settings-content input[type="password"]:focus,
    .settings-content textarea:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px var(--primary-glow, rgba(159, 64, 245, 0.3));
    }

    .settings-content textarea {
        resize: vertical;
        min-height: 100px;
        line-height: 1.6;
    }

    .settings-content .checkbox-group {
        flex-direction: row;
        align-items: center;
        gap: 0.75rem;
    }

    .settings-content .checkbox-group label {
        user-select: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 0.75rem;
        color: var(--text-secondary);
        font-weight: 500;
        font-size: 0.95rem;
        line-height: 1.3;
    }

    .settings-content input[type="checkbox"] {
        -webkit-appearance: none;
        appearance: none;
        flex-shrink: 0;
        width: 1.35em;
        height: 1.35em;
        border: 1px solid var(--border-color);
        background-color: var(--surface-2);
        border-radius: var(--border-radius-sm);
        cursor: pointer;
        position: relative;
        transition: var(--transition-fast);
    }

    .settings-content input[type="checkbox"]::before {
        content: "\f00c";
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        font-size: 0.8em;
        color: white;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) scale(0);
        transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .settings-content input[type="checkbox"]:checked {
        border-color: var(--primary-color);
        background-color: var(--primary-color);
    }

    .settings-content input[type="checkbox"]:checked::before {
        transform: translate(-50%, -50%) scale(1);
    }

    .settings-content input[type="checkbox"]:hover:not(:checked) {
        border-color: var(--text-secondary);
    }


    #summary-container {
        background: var(--surface-1);
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-lg);
        padding: 2.5rem;
    }

    #summary-title {
        font-size: 1.75rem;
        font-weight: 700;
        padding: 0 1rem 1.25rem;
        margin-bottom: 1.5rem;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
    }

    #summary-title-text {
        flex-grow: 1;      /* Allows this element to grow and fill the empty space */
        text-align: center;/* Centers the text within the now-expanded span */
        margin: 0 1rem;    /* Adds space between the text and the icons */
    }

    #summary-title i {
        color: var(--primary-color);
    }

    md-block {
        font-size: 1.05rem;
        line-height: 1.8;
        color: var(--text-secondary);
    }

    md-block>*+* {
        margin-top: 1.25em;
    }

    md-block h1,
    md-block h2,
    md-block h3,
    md-block h4 {
        color: var(--text-primary);
        line-height: 1.3;
        margin-bottom: 0.75em;
    }

    md-block h2 {
        padding-bottom: 0.4em;
        border-bottom: 1px solid var(--border-color);
    }

    md-block a {
        color: var(--primary-color);
        text-decoration: none;
        font-weight: 500;
        transition: var(--transition-fast);
        border-bottom: 1px solid transparent;
    }

    md-block a:hover {
        color: var(--accent-color);
        border-bottom-color: var(--accent-color);
    }

    md-block code {
        background-color: var(--surface-2);
        padding: 0.25em 0.5em;
        border-radius: var(--border-radius-sm);
        font-family: 'JetBrains Mono', 'Fira Code', monospace;
        font-size: 0.9em;
        color: var(--text-primary);
        border: 1px solid var(--border-color);
    }

    md-block pre {
        background-color: var(--surface-bg);
        padding: 1.25rem;
        border-radius: var(--border-radius-md);
        overflow-x: auto;
        border: 1px solid var(--border-color);
        font-size: 0.9rem;
    }

    md-block pre code {
        background: none;
        padding: 0;
        border: none;
    }

    md-block blockquote {
        border-left: 3px solid var(--primary-color);
        padding-left: 1.5rem;
        font-style: italic;
        color: var(--text-muted);
    }

    md-block ul,
    md-block ol {
        padding-left: 1.5rem;
    }

    md-block li::marker {
        color: var(--primary-color);
        font-weight: 600;
    }

    md-block hr {
        border: none;
        height: 1px;
        background-color: var(--border-color);
    }


    #transcript-section {
        margin-top: 2rem;
        border-top: 1px solid var(--border-color);
        padding-top: 2rem;
    }

    #transcript-details {
        border: 1px solid var(--border-color);
        border-radius: var(--border-radius-lg);
        background: var(--surface-1);
        overflow: hidden;
    }

    #transcript-details summary {
        font-size: 1.1rem;
        padding: 1.25rem;
        cursor: pointer;
        font-weight: 500;
        display: flex;
        align-items: center;
        gap: 0.75rem;
        list-style: none;
        transition: var(--transition-fast);
        justify-content: space-between;
    }

    #transcript-details summary:hover {
        background-color: var(--surface-2);
    }

    #transcript-details[open]>summary {
        border-bottom: 1px solid var(--border-color);
    }

    #transcript-details summary > span:first-child {
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

    .summary-actions {
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

    .summary-actions::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        transition: transform 0.3s ease;
        font-size: 0.8rem;
        color: var(--text-muted);
    }

    #transcript-details[open] summary .summary-actions::after {
        transform: rotate(180deg);
    }

    #transcript-text {
        background-color: var(--surface-bg);
        padding: 1.5rem;
        margin: 0;
        max-height: 300px;
        overflow-y: auto;
        color: var(--text-muted);
        font-size: 0.95rem;
        border: none;
        border-radius: 0;
        line-height: 1.7;
        white-space: pre-wrap;
        word-wrap: break-word;
    }

    #status-container {
        padding: 3rem 0;
        text-align: center;
    }

    #loader {
        /* display is managed by script.js */
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
        color: var(--text-secondary);
        font-size: 1.1rem;
        font-weight: 500;
    }

    .spinner {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        border: 5px solid var(--surface-3);
        border-top-color: var(--primary-color);
        animation: spin 1s ease-in-out infinite;
    }

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

    #error-message {
        color: var(--error-color);
        font-weight: 500;
        background-color: oklch(65% 0.22 25 / 0.1);
        padding: 1rem 1.5rem;
        border-radius: var(--border-radius-md);
        border: 1px solid oklch(65% 0.22 25 / 0.3);
        /* display is managed by script.js */
    }
}

@layer utilities {
    .hidden {
        display: none !important;
    }
}

#menu-toggle-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1002;
    background-color: var(--surface-2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-md);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

#menu-toggle-btn:hover {
    background-color: var(--surface-3);
    border-color: var(--primary-color);
}

body.sidebar-open #menu-toggle-btn {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.1s ease-in-out;
}

#close-sidebar-btn {
    display: none;
}

#sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: oklch(0 0 0 / 0.5);
    z-index: 1000;
}


@media (max-width: 800px) {
    #sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        z-index: 1001;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        border-right: 1px solid var(--border-color);
        box-shadow: 0 0 25px oklch(0 0 0 / 0.2);
        background-color: var(--surface-1);
    }

    body.sidebar-open #sidebar {
        transform: translateX(0);
    }

    body.sidebar-open #sidebar-overlay {
        display: block;
    }

    #menu-toggle-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    #close-sidebar-btn {
        display: block;
        padding: 0.8rem;
    }

    .sidebar-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    #new-summary-btn {
        flex-grow: 1;
        margin-right: 0.5rem;
    }

    #main-content {
        padding: 5rem 1.5rem 2rem;
    }

    #welcome-view, #summary-view {
        margin-top: 0;
        max-width: 100%;
    }

    #welcome-view header {
        margin-bottom: 2rem;
    }

    #welcome-view header h1 {
        font-size: 2.5rem;
    }

    #summary-form {
        flex-direction: column;
    }

    #summary-container {
        padding: 1.5rem;
    }

    #summary-title {
        font-size: 1.5rem;
        padding: 0 0 1rem;
        margin-bottom: 1rem;
    }

    #transcript-details summary {
        font-size: 1rem;
        padding: 1rem;
    }

    #transcript-details summary .summary-actions::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        transition: transform 0.3s ease;
        font-size: 0.8rem;
        color: var(--text-muted);
        margin-left: 0.5rem;
    }

    #transcript-details[open] summary .summary-actions::after {
        transform: rotate(180deg);
    }
}