/**
 * Chat Redesign - Standalone CSS
 * Modern, minimalistisch, Dark/Light Mode
 */

/* Theme Variables */
:root {
    --chat-bg: #ffffff;
    --chat-bg-secondary: #f7f7f8;
    --chat-bg-tertiary: #ececf1;
    --chat-text: #0d0d0d;
    --chat-text-secondary: #6e6e80;
    --chat-border: #e5e5e5;
    --chat-accent: #0d0d0d;
    --chat-user-bg: #0d0d0d;
    --chat-user-text: #ffffff;
    --chat-input-bg: #ffffff;
    --chat-input-border: #d9d9e3;
    --chat-sidebar-bg: #f9f9f9;
    --chat-hover: rgba(0,0,0,0.04);
    --chat-success: #10a37f;
    --chat-warning: #f5a623;
}

[data-theme="dark"] {
    --chat-bg: #212121;
    --chat-bg-secondary: #2f2f2f;
    --chat-bg-tertiary: #3f3f3f;
    --chat-text: #ececec;
    --chat-text-secondary: #8e8ea0;
    --chat-border: #444654;
    --chat-accent: #ffffff;
    --chat-user-bg: #2f2f2f;
    --chat-user-text: #ececec;
    --chat-input-bg: #2f2f2f;
    --chat-input-border: #444654;
    --chat-sidebar-bg: #171717;
    --chat-hover: rgba(255,255,255,0.05);
    --chat-success: #10a37f;
    --chat-warning: #f5a623;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--chat-bg);
    color: var(--chat-text);
    line-height: 1.5;
}

/* Layout */
.chat-layout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.chat-sidebar {
    width: 280px;
    background: var(--chat-sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-right: 1px solid var(--chat-border);
}

.chat-sidebar__header {
    padding: 12px;
}

.chat-sidebar__new {
    display: block;
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    color: var(--chat-text);
    font-size: 14px;
    text-decoration: none;
    text-align: center;
    transition: background 0.15s;
}

.chat-sidebar__new:hover {
    background: var(--chat-hover);
}

.chat-sidebar__delete-all {
    display: block;
    width: 100%;
    margin-top: 8px;
    padding: 8px;
    background: transparent;
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    color: var(--chat-text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s;
}

.chat-sidebar__delete-all:hover {
    background: rgba(220, 53, 69, 0.1);
    border-color: #dc3545;
    color: #dc3545;
}

.chat-sidebar__list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

/* Session Item */
.chat-session {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--chat-text);
    text-decoration: none;
    margin-bottom: 2px;
    position: relative;
    transition: background 0.15s;
}

.chat-session:hover {
    background: var(--chat-hover);
}

.chat-session--active {
    background: var(--chat-bg-tertiary);
}

.chat-session--empty {
    color: var(--chat-text-secondary);
    text-align: center;
    font-style: italic;
}

.chat-session__title {
    font-weight: 500;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 50px;
}

.chat-session__meta {
    display: flex;
    gap: 8px;
    font-size: 12px;
    color: var(--chat-text-secondary);
    margin-top: 4px;
    flex-wrap: wrap;
}

.chat-session__date {
    color: var(--chat-text-secondary);
    font-size: 11px;
}

.chat-session__cost {
    color: var(--chat-warning);
}

.chat-session__local {
    color: var(--chat-success);
}

.chat-session__actions {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.15s;
}

.chat-session:hover .chat-session__actions {
    opacity: 1;
}

.chat-session__edit,
.chat-session__delete {
    background: none;
    border: none;
    color: var(--chat-text-secondary);
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
}

.chat-session__edit:hover { color: var(--chat-accent); }
.chat-session__delete:hover { color: #dc3545; }

.chat-session__input {
    width: 100%;
    padding: 2px 4px;
    border: 1px solid var(--chat-accent);
    border-radius: 4px;
    font-size: inherit;
    font-family: inherit;
    background: var(--chat-bg);
    color: var(--chat-text);
}

/* Overlay */
.chat-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}

.chat-overlay--visible {
    display: block;
}

/* Main Area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--chat-bg);
}

/* Header */
.chat-header {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--chat-border);
    gap: 12px;
}

.chat-toggle {
    background: var(--chat-bg-secondary);
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--chat-text);
    flex-shrink: 0;
}

.chat-toggle:hover {
    background: var(--chat-bg-tertiary);
}

.chat-toggle svg {
    width: 20px;
    height: 20px;
}

.chat-header__logo {
    display: flex;
    align-items: center;
    margin-right: 12px;
}

.chat-header__logo img {
    height: 32px;
    width: auto;
}

.chat-header__title {
    flex: 1;
    min-width: 0;
}

.chat-header__title h1 {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-header__actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* Buttons */
.chat-btn {
    padding: 8px 12px;
    background: var(--chat-bg-secondary);
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    color: var(--chat-text);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}

.chat-btn:hover {
    background: var(--chat-bg-tertiary);
}

.chat-btn--ghost {
    background: transparent;
}

.chat-btn--icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

/* Dropdown */
.chat-dropdown {
    position: relative;
}

.chat-dropdown__menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--chat-bg);
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    min-width: 150px;
    z-index: 50;
}

.chat-dropdown--open .chat-dropdown__menu {
    display: block;
}

.chat-dropdown__item {
    display: block;
    padding: 10px 14px;
    color: var(--chat-text);
    text-decoration: none;
    font-size: 13px;
}

.chat-dropdown__item:hover {
    background: var(--chat-hover);
}

/* Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.chat-messages__inner {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Welcome */
.chat-welcome {
    text-align: center;
    padding: 60px 24px;
    color: var(--chat-text-secondary);
}

.chat-welcome h2 {
    color: var(--chat-text);
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 8px;
}

.chat-welcome p {
    margin: 0;
}

.chat-welcome__logo {
    width: 80px;
    height: auto;
    margin-bottom: 16px;
    opacity: 0.9;
}

/* Message */
.chat-msg {
    padding: 16px 0;
}

.chat-msg--user {
    display: flex;
    justify-content: flex-end;
}

.chat-msg--user .chat-msg__content {
    background: var(--chat-user-bg);
    color: var(--chat-user-text);
    border-radius: 18px;
    padding: 12px 18px;
    max-width: 80%;
}

.chat-msg--assistant .chat-msg__content {
    line-height: 1.7;
}

.chat-msg__content p {
    margin: 0 0 12px;
}

.chat-msg__content p:last-child {
    margin-bottom: 0;
}

.chat-msg__content ul, .chat-msg__content ol {
    margin: 12px 0;
    padding-left: 24px;
}

.chat-msg__content li {
    margin: 6px 0;
}

.chat-msg__meta {
    margin-top: 12px;
    font-size: 12px;
    color: var(--chat-text-secondary);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.chat-msg__tokens {
    background: var(--chat-bg-secondary);
    padding: 2px 8px;
    border-radius: 4px;
}

.chat-msg__cost {
    color: var(--chat-warning);
}

.chat-msg__local {
    color: var(--chat-success);
}

/* Sources */
.chat-sources {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--chat-border);
}

.chat-sources__toggle {
    background: none;
    border: none;
    color: var(--chat-text-secondary);
    font-size: 13px;
    cursor: pointer;
    padding: 0;
}

.chat-sources__toggle:hover {
    color: var(--chat-text);
}

.chat-sources__list {
    display: none;
    margin-top: 12px;
    flex-direction: column;
    gap: 8px;
}

.chat-sources--open .chat-sources__list {
    display: flex;
}

.chat-source {
    padding: 10px 12px;
    background: var(--chat-bg-secondary);
    border-radius: 8px;
    font-size: 13px;
    border-left: 3px solid var(--chat-accent);
}

.chat-source__header {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.chat-source__collection {
    background: var(--chat-bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-family: monospace;
}

.chat-source__title {
    font-weight: 500;
}

.chat-source__score {
    background: var(--chat-accent);
    color: var(--chat-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    margin-left: auto;
}

.chat-source__content {
    margin-top: 8px;
    font-size: 12px;
    color: var(--chat-text-secondary);
    font-style: italic;
    line-height: 1.5;
}

/* Actions (Promote to Content) */
.chat-msg__actions {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--chat-border);
}

.chat-promote-form {
    display: inline-block;
}

.chat-promote-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--chat-bg-secondary);
    color: var(--chat-text-secondary);
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.chat-promote-btn:hover {
    background: var(--chat-accent);
    color: var(--chat-bg);
    border-color: var(--chat-accent);
}

.chat-promote-btn__icon {
    font-size: 14px;
}

.chat-promote-btn__text {
    font-weight: 500;
}

/* Input Area */
.chat-input-area {
    padding: 16px 24px 24px;
    border-top: 1px solid var(--chat-border);
    background: var(--chat-bg);
}

.chat-input-wrapper {
    max-width: 768px;
    margin: 0 auto;
}

.chat-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-input-row {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--chat-input-bg);
    border: 1px solid var(--chat-input-border);
    border-radius: 24px;
    padding: 6px 6px 6px 18px;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.chat-input-row:focus-within {
    border-color: var(--chat-accent);
    box-shadow: 0 0 0 1px var(--chat-accent);
}

.chat-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 15px;
    color: var(--chat-text);
    outline: none;
    padding: 8px 0;
}

.chat-input::placeholder {
    color: var(--chat-text-secondary);
}

.chat-send {
    padding: 10px 20px;
    border-radius: 20px;
    background: var(--chat-accent);
    border: none;
    color: var(--chat-bg);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    flex-shrink: 0;
    transition: opacity 0.15s;
}

.chat-send:hover {
    opacity: 0.9;
}

.chat-send:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.chat-send__loading {
    display: none;
    gap: 4px;
}

.chat-send--loading .chat-send__text { display: none; }
.chat-send--loading .chat-send__loading { display: inline-flex; }

.chat-send__loading span {
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    animation: chat-bounce 1.4s infinite ease-in-out both;
}

.chat-send__loading span:nth-child(1) { animation-delay: -0.32s; }
.chat-send__loading span:nth-child(2) { animation-delay: -0.16s; }

@keyframes chat-bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* Settings */
.chat-settings {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.chat-settings--advanced {
    padding-top: 8px;
    border-top: 1px solid var(--chat-border);
}

.chat-settings--hidden {
    display: none;
}

.chat-select {
    padding: 6px 10px;
    border: 1px solid var(--chat-input-border);
    border-radius: 8px;
    background: var(--chat-input-bg);
    color: var(--chat-text);
    font-size: 13px;
    cursor: pointer;
}

.chat-select:focus {
    outline: none;
    border-color: var(--chat-accent);
}

.chat-select--multi {
    min-width: 180px;
}

.chat-select--multi option {
    padding: 4px 8px;
}

.chat-select--multi option:checked {
    background: var(--chat-accent);
    color: var(--chat-bg);
}

.chat-settings-toggle {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    color: var(--chat-text-secondary);
    font-size: 13px;
    cursor: pointer;
}

.chat-settings-toggle:hover {
    background: var(--chat-hover);
    color: var(--chat-text);
}

/* Collections */
.chat-collections {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.chat-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--chat-text-secondary);
    cursor: pointer;
}

.chat-checkbox input {
    width: 16px;
    height: 16px;
    accent-color: var(--chat-accent);
}

.chat-checkbox:has(input:checked) {
    color: var(--chat-text);
}

.chat-checkbox__count {
    font-size: 11px;
    opacity: 0.7;
}

.chat-checkbox--quality {
    padding: 4px 10px;
    border: 1px solid var(--chat-border);
    border-radius: 8px;
}

/* Temperature */
.chat-temp {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border: 1px solid var(--chat-border);
    border-radius: 8px;
    font-size: 13px;
    color: var(--chat-text-secondary);
}

.chat-temp label {
    white-space: nowrap;
}

.chat-temp span {
    font-weight: 600;
    color: var(--chat-text);
    min-width: 2ch;
}

.chat-temp input[type="range"] {
    width: 80px;
    height: 6px;
    accent-color: var(--chat-accent);
}

/* Presets */
.chat-presets {
    display: flex;
    gap: 4px;
}

.chat-preset {
    padding: 6px 10px;
    background: var(--chat-bg);
    border: 1px solid var(--chat-border);
    border-radius: 6px;
    font-size: 12px;
    color: var(--chat-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.chat-preset:hover {
    background: var(--chat-hover);
    border-color: var(--chat-accent);
}

.chat-preset--active {
    background: var(--chat-accent);
    color: var(--chat-bg);
    border-color: var(--chat-accent);
}

/* Mobile */
@media (max-width: 768px) {
    .chat-sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
    }

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

    .chat-sidebar--open + .chat-overlay {
        display: block;
    }

    .chat-messages__inner {
        padding: 0 16px;
    }

    .chat-input-area {
        padding: 12px 16px 20px;
    }

    .chat-msg--user .chat-msg__content {
        max-width: 90%;
    }

    .chat-settings {
        gap: 6px;
    }

    .chat-select {
        font-size: 12px;
        padding: 5px 8px;
    }
}

/* Scrollbar */
.chat-messages::-webkit-scrollbar,
.chat-sidebar__list::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track,
.chat-sidebar__list::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb,
.chat-sidebar__list::-webkit-scrollbar-thumb {
    background: var(--chat-border);
    border-radius: 3px;
}

/* Quality Badge */
.chat-quality {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
}

.chat-quality--passed {
    background: rgba(16, 163, 127, 0.1);
    color: var(--chat-success);
}

.chat-quality--failed {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

.chat-quality__icon {
    font-size: 16px;
}

.chat-quality__issues {
    margin-top: 8px;
    font-size: 12px;
}

.chat-quality__issues ul {
    margin: 4px 0 0;
    padding-left: 16px;
}

/* Progress Display */
.chat-progress {
    background: var(--chat-bg-secondary);
    border: 1px solid var(--chat-border);
    border-radius: 12px;
    padding: 16px;
    margin: 8px 0;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    font-size: 12px;
}

.chat-progress__header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--chat-text);
    font-size: 14px;
}

.chat-progress__spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--chat-border);
    border-top-color: var(--chat-success);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.chat-progress__current {
    flex: 1;
}

.chat-progress__log {
    max-height: 300px;
    overflow-y: auto;
}

.chat-progress__entry {
    display: flex;
    gap: 12px;
    padding: 4px 0;
    border-bottom: 1px solid var(--chat-border);
    align-items: baseline;
}

.chat-progress__entry:last-child {
    border-bottom: none;
}

.chat-progress__time {
    color: var(--chat-text-secondary);
    flex-shrink: 0;
    font-size: 11px;
}

.chat-progress__msg {
    color: var(--chat-text);
    flex: 1;
}

.chat-progress__duration {
    color: var(--chat-success);
    font-weight: 500;
    flex-shrink: 0;
    background: rgba(16, 163, 127, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
}

.chat-progress--done {
    opacity: 0.7;
    border-color: var(--chat-success);
}

.chat-progress--done .chat-progress__header {
    color: var(--chat-success);
}

/* Error Display */
.chat-error {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid rgba(220, 53, 69, 0.3);
}

/* ====================================
   CONFIG PANEL
   ==================================== */

/* Accessibility: visually hidden but screen-reader accessible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.config-panel {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    width: 50%;
    background: var(--chat-bg);
    border-left: 1px solid var(--chat-border);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    z-index: 90;
    display: flex;
    flex-direction: column;
}

.config-panel--open {
    transform: translateX(0);
}

.config-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
}

.config-panel__title {
    font-weight: 600;
    font-size: 15px;
    color: var(--chat-text);
}

.config-panel__close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--chat-text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
}

.config-panel__close:hover {
    color: var(--chat-text);
}

.config-panel__close:focus {
    outline: 2px solid var(--chat-accent);
    outline-offset: 2px;
}

.config-panel__body {
    flex: 1;
    overflow-y: auto;
    padding: 0 24px 24px;
}

.config-panel__group {
    margin-bottom: 28px;
}

.config-panel__label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--chat-text);
    margin-bottom: 8px;
}

.config-panel__select {
    width: calc(100% - 40px);
    padding: 10px 0;
    border: none;
    border-bottom: 1px solid var(--chat-border);
    border-radius: 0;
    background: transparent;
    color: var(--chat-text);
    font-size: 14px;
    cursor: pointer;
}

.config-panel__select:focus {
    outline: none;
    border-bottom-color: var(--chat-accent);
}

.config-panel__select.is-saving {
    opacity: 0.5;
    pointer-events: none;
}

.config-panel__select.is-saved {
    border-bottom-color: var(--chat-success);
    animation: config-flash-success 0.6s ease;
}

@keyframes config-flash-success {
    0% { background-color: rgba(16, 163, 127, 0.2); }
    100% { background-color: transparent; }
}

.config-panel__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--chat-text-secondary);
    cursor: pointer;
    font-size: 14px;
    vertical-align: middle;
    margin-left: 8px;
}

.config-panel__toggle:hover {
    color: var(--chat-text);
}

.config-panel__toggle:focus {
    outline: 2px solid var(--chat-accent);
    outline-offset: 2px;
}

.config-panel__toggle[aria-expanded="true"] {
    color: var(--chat-accent);
}

.config-panel__editor {
    margin-top: 16px;
}

.config-panel__editor--hidden {
    display: none;
}

.config-panel__textarea {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 0;
    background: var(--chat-bg-secondary);
    color: var(--chat-text);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.6;
    resize: vertical;
    min-height: 200px;
}

.config-panel__textarea:focus {
    outline: none;
    background: var(--chat-bg-tertiary);
}

.config-panel__actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
}

.config-panel__version {
    font-size: 12px;
    color: var(--chat-text-secondary);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

.config-panel__save {
    padding: 10px 20px;
    background: var(--chat-accent);
    color: var(--chat-bg);
    border: none;
    border-radius: 0;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s;
}

.config-panel__save:hover {
    opacity: 0.85;
}

.config-panel__save:focus {
    outline: 2px solid var(--chat-accent);
    outline-offset: 2px;
}

/* Toggle Button (fixed position) */
.config-panel__toggle-btn {
    position: fixed;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: var(--chat-bg-secondary);
    border: 1px solid var(--chat-border);
    border-radius: 50%;
    color: var(--chat-text-secondary);
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 80;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.config-panel__toggle-btn:hover {
    background: var(--chat-bg-tertiary);
    color: var(--chat-text);
}

.config-panel__toggle-btn:focus {
    outline: 2px solid var(--chat-accent);
    outline-offset: 2px;
}

/* Hide toggle button when panel is open */
.config-panel--open + .config-panel__toggle-btn {
    display: none;
}

/* Collections */
.config-panel__collections {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.config-panel__checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--chat-text);
    cursor: pointer;
    padding: 6px 0;
    transition: color 0.15s;
}

.config-panel__checkbox:hover {
    color: var(--chat-accent);
}

.config-panel__checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--chat-accent);
    cursor: pointer;
}

.config-panel__checkbox--large {
    padding: 12px 0;
}

.config-panel__count {
    font-size: 12px;
    color: var(--chat-text-secondary);
}

/* Slider */
.config-panel__slider {
    width: 100%;
    height: 6px;
    accent-color: var(--chat-accent);
    cursor: pointer;
    margin-top: 8px;
}

/* Presets */
.config-panel__presets {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.config-panel__preset {
    flex: 1;
    padding: 10px 16px;
    background: transparent;
    border: 1px solid var(--chat-border);
    color: var(--chat-text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
}

.config-panel__preset:hover {
    border-color: var(--chat-accent);
    color: var(--chat-text);
}

.config-panel__preset--active {
    background: var(--chat-accent);
    color: var(--chat-bg);
    border-color: var(--chat-accent);
}

.config-panel__preset.is-saving {
    opacity: 0.5;
}

.config-panel__preset.is-saved {
    animation: config-flash-success 0.6s ease;
}

/* Divider */
.config-panel__divider {
    border: none;
    border-top: 1px solid var(--chat-border);
    margin: 24px 0;
}

/* Export */
.config-panel__export {
    display: flex;
    gap: 12px;
}

.config-panel__export-btn {
    flex: 1;
    padding: 10px 16px;
    background: var(--chat-bg-secondary);
    border: 1px solid var(--chat-border);
    color: var(--chat-text);
    text-decoration: none;
    text-align: center;
    font-size: 13px;
    transition: all 0.15s;
}

.config-panel__export-btn:hover {
    background: var(--chat-bg-tertiary);
    border-color: var(--chat-accent);
}

/* Theme Toggle */
.config-panel__theme {
    width: 100%;
    padding: 12px 16px;
    background: var(--chat-bg-secondary);
    border: 1px solid var(--chat-border);
    color: var(--chat-text);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.config-panel__theme:hover {
    background: var(--chat-bg-tertiary);
}

/* Tablet: Schmaler */
@media (max-width: 1024px) {
    .config-panel {
        width: 380px;
    }
}

/* Mobile: Full width config panel */
@media (max-width: 768px) {
    .config-panel {
        width: 100%;
    }

    .config-panel__toggle-btn {
        right: 12px;
        bottom: 100px;
        top: auto;
        transform: none;
    }
}