:root {
    --theme-primary: #C2A674;
    --theme-primary-light: #e9be74;
    --theme-primary-o-50: rgba(194, 166, 116, 0.5);
    --theme-primary-o-70: rgba(194, 166, 116, 0.7);
    --theme-primary-1: #9a7332;
    --theme-secondary: #A88E61;
    --theme-secondary-o-50: rgba(168, 142, 97, 0.5);
    --theme-secondary-o-70: rgba(168, 142, 97, 0.7);
    --theme-secondary-1: #917442;
    --theme-footer: #4D4639;
    --theme-gray: #7C7C7C;
    --theme-dark: #000;
    --theme-gold: #C9993C;
    --theme-gold-1: #8C6A31;
    --theme-danger: #FF6969;
    --theme-danger-1: #A10000;
    --theme-green: #5f7030;
    --search-bar: #fff;
    --scrollable-thumb-color: #B0B0B0;
    --scrollable-track-color: #D9D9D9;

    --bg-primary: #f5f3ef;
    --bg-secondary: #ffffff;
    --bg-message: #faf8f5;
    --text-primary: #2c2820;
    --text-secondary: var(--theme-gray);
    --border: rgba(194, 166, 116, 0.35);
    --success: var(--theme-green);
    --pending: var(--theme-gold);
    --error: var(--theme-danger-1);
    --shadow: 0 1px 6px 0 rgb(0 0 0 / 12%);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    direction: rtl;
    text-align: right;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

body:not(.is-authenticated) > header,
body:not(.is-authenticated) > main,
body:not(.is-authenticated) > footer {
    display: none;
}

.login-gate {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(circle at top right, rgba(201, 153, 60, 0.15), transparent 45%),
        linear-gradient(160deg, #f5f3ef 0%, #ebe6dc 100%);
}

.login-card {
    width: min(420px, 100%);
    padding: 32px 28px 28px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    box-shadow: var(--shadow);
    text-align: center;
}

.login-logo {
    width: 72px;
    height: 72px;
    margin-bottom: 12px;
}

.login-title {
    margin: 0 0 6px;
    font-size: 1.35rem;
    color: var(--theme-primary-1);
}

.login-subtitle {
    margin: 0 0 10px;
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.login-card .header-beta {
    margin-bottom: 22px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: right;
}

.login-form label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--theme-primary-1);
}

.login-form input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--bg-message);
    color: var(--text-primary);
}

.login-form input:focus {
    outline: none;
    border-color: var(--theme-primary);
    box-shadow: 0 0 0 3px var(--theme-primary-o-50);
}

#loginBtn {
    margin-top: 6px;
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    background: var(--theme-primary);
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}

#loginBtn:hover:not(:disabled) {
    background: var(--theme-primary-1);
}

#loginBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-error {
    margin: 0;
    padding: 8px 10px;
    border-radius: 8px;
    background: rgba(161, 0, 0, 0.08);
    color: var(--theme-danger-1);
    font-size: 0.85rem;
}

#logoutBtn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 9px 14px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
    white-space: nowrap;
}

#logoutBtn:hover {
    border-color: var(--theme-danger-1);
    color: var(--theme-danger-1);
    background: rgba(161, 0, 0, 0.05);
}

header {
    background: var(--bg-secondary);
    border-bottom: 3px solid var(--theme-primary);
    padding: 14px 24px;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 960px;
    margin: 0 auto;
    gap: 16px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.header-logo {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    object-fit: contain;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--theme-primary-1);
}

.subtitle {
    font-size: 0.88rem;
    color: var(--theme-secondary-1);
    margin-top: 2px;
}

.header-beta {
    display: inline-block;
    margin-top: 6px;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--theme-gold-1);
    background: rgba(201, 153, 60, 0.14);
    border: 1px solid rgba(201, 153, 60, 0.35);
    letter-spacing: 0.02em;
}

#clearChatBtn {
    background: var(--bg-message);
    border: 1px solid var(--border);
    color: var(--theme-primary-1);
    padding: 9px 16px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
}

#clearChatBtn:hover:not(:disabled) {
    border-color: var(--theme-primary);
    background: rgba(194, 166, 116, 0.12);
}

#clearChatBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

main#chatContainer {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollable-thumb-color) var(--scrollable-track-color);
}

main#chatContainer::-webkit-scrollbar {
    width: 6px;
}

main#chatContainer::-webkit-scrollbar-thumb {
    background: var(--scrollable-thumb-color);
    border-radius: 25px;
}

.welcome-message {
    text-align: center;
    padding: 40px 24px;
    color: var(--text-secondary);
}

.welcome-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    opacity: 0.95;
}

.welcome-message h2 {
    color: var(--theme-primary-1);
    margin-bottom: 12px;
    font-size: 1.35rem;
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 24px;
}

.suggestion {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.suggestion:hover {
    border-color: var(--theme-primary);
    color: var(--theme-primary-1);
    background: var(--theme-primary-o-50);
    background: rgba(194, 166, 116, 0.12);
}

.message {
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-user {
    background: var(--bg-secondary);
    border-right: 4px solid var(--theme-secondary);
    border-radius: 12px;
    padding: 16px 20px;
    margin-left: 48px;
    box-shadow: var(--shadow);
}

.message-assistant {
    background: var(--bg-message);
    border-right: 4px solid var(--theme-primary);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.message-label {
    font-size: 0.85rem;
    color: var(--theme-secondary-1);
    margin-bottom: 12px;
    font-weight: 600;
}

.progress-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.step {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.step.done {
    color: var(--success);
}

.step.active {
    color: var(--theme-gold-1);
}

.step.active .step-spinner {
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.answer-content {
    line-height: 1.8;
    font-size: 1rem;
}

.answer-content h1,
.answer-content h2,
.answer-content h3 {
    color: var(--theme-primary-1);
    margin-top: 1.2em;
    margin-bottom: 0.5em;
}

.answer-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    direction: rtl;
}

.answer-content th {
    background: var(--theme-gold);
    color: #fff;
    font-weight: 600;
}

.answer-content td,
.answer-content th {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: right;
}

.answer-content code {
    background: rgba(194, 166, 116, 0.15);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

.answer-content blockquote {
    border-right: 4px solid var(--theme-primary);
    background: var(--bg-secondary);
    padding: 12px 16px;
    margin: 8px 0;
}

.answer-content ul,
.answer-content ol {
    padding-right: 24px;
}

.sources {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.sources-header {
    color: var(--theme-primary-1);
    font-weight: 600;
    margin-bottom: 12px;
}

.sources-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
}

.source-tab {
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    padding: 10px 16px;
    cursor: pointer;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s;
    font-family: inherit;
}

.source-tab:hover {
    color: var(--theme-primary-1);
}

.source-tab.active {
    color: var(--theme-primary-1);
    border-bottom-color: var(--theme-gold);
}

.sources-panel.hidden {
    display: none;
}

.sources-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
    font-size: 0.9rem;
}

.source-item.source-highlight {
    border-color: var(--theme-gold);
    border-right-width: 4px;
    box-shadow: 0 0 0 2px rgba(201, 153, 60, 0.25);
    background: rgba(201, 153, 60, 0.08);
}

.answer-content a[href^="#ref-"] {
    color: var(--theme-gold-1);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.answer-content a[href^="#ref-"]:hover {
    color: var(--theme-primary-1);
}

.source-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.source-item:hover {
    border-right: 4px solid var(--theme-primary);
}

.source-inactive {
    opacity: 0.75;
    border-right: 4px solid var(--theme-danger);
}

.source-rank {
    color: var(--theme-gold);
    font-weight: 700;
    flex-shrink: 0;
}

.source-title-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 4px;
}

.source-title {
    font-weight: 600;
    flex: 1;
    min-width: 0;
}

.source-title-main {
    font-weight: 700;
    color: var(--theme-primary-1);
    line-height: 1.45;
}

.source-title-detail {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-top: 2px;
}

.source-article {
    display: inline-block;
    background: var(--theme-gold);
    color: #fff;
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.source-path {
    margin-bottom: 8px;
}

.path-breadcrumb {
    display: block;
}

.path-breadcrumb--labeled {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.path-breadcrumb-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--theme-gold-1);
    letter-spacing: 0.02em;
}

.path-breadcrumb-label::before {
    content: "📂";
    font-size: 0.85rem;
}

.path-trail {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.path-chip {
    display: inline-flex;
    align-items: center;
    max-width: 100%;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-message);
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.45;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.path-chip-root {
    background: rgba(95, 112, 48, 0.1);
    border-color: rgba(95, 112, 48, 0.25);
    color: var(--theme-green);
    font-weight: 600;
}

.path-chip-leaf {
    background: rgba(201, 153, 60, 0.12);
    border-color: rgba(201, 153, 60, 0.35);
    color: var(--theme-primary-1);
    font-weight: 700;
}

.path-chevron {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    color: var(--theme-gold);
    opacity: 0.85;
}

.path-chevron::before {
    content: "‹";
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1;
}

.source-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 6px;
}

.source-type {
    display: inline-block;
    background: rgba(95, 112, 48, 0.15);
    color: var(--theme-green);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 600;
}

.source-year {
    display: inline-block;
    background: var(--theme-primary-o-50);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.78rem;
}

.source-cancelled {
    display: inline-block;
    background: rgba(161, 0, 0, 0.12);
    color: var(--theme-danger-1);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 600;
}

.source-sari {
    display: inline-block;
    background: var(--theme-green);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 700;
}

.source-active {
    color: var(--theme-green);
    font-size: 0.78rem;
    font-weight: 600;
}

.source-snippet {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.source-item:focus-visible {
    outline: 2px solid var(--theme-primary);
    outline-offset: 2px;
}

.modal-content-source {
    max-width: 720px;
    width: 94%;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.modal-content-source .modal-close {
    top: 14px;
    left: 14px;
    z-index: 2;
    background: var(--bg-secondary);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.source-modal-header {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 20px 48px 12px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-message);
}

.source-modal-rank {
    color: var(--theme-gold);
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.source-modal-header h3 {
    margin: 0 0 6px;
    color: var(--theme-primary-1);
    font-size: 1rem;
    line-height: 1.5;
}

.source-modal-header .source-title-main {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--theme-primary-1);
}

.source-modal-header .source-title-detail {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 3px;
}

.source-modal-meta {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.source-modal-path {
    padding: 12px 20px 14px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(201, 153, 60, 0.06) 0%, var(--bg-secondary) 100%);
}

.source-modal-path .path-breadcrumb-label {
    font-size: 0.8rem;
}

.source-modal-path .path-chip {
    font-size: 0.84rem;
    padding: 6px 12px;
}

.source-modal-path .path-trail {
    gap: 8px;
}

.source-modal-article {
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--theme-gold-1);
    background: rgba(201, 153, 60, 0.1);
    border-bottom: 1px solid var(--border);
}

.source-modal-text {
    flex: 1;
    margin: 0;
    padding: 16px 20px 20px;
    overflow-y: auto;
    font-size: 0.92rem;
    line-height: 1.85;
    color: var(--text-primary);
    background: var(--bg-secondary);
    scrollbar-width: thin;
    scrollbar-color: var(--scrollable-thumb-color) var(--scrollable-track-color);
}

.source-legal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.legal-text-block {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-message);
}

.legal-text-block.is-cancelled {
    border-color: rgba(161, 0, 0, 0.25);
}

.legal-text-final .legal-text-label {
    background: rgba(95, 112, 48, 0.12);
    color: var(--theme-green);
}

.legal-text-original .legal-text-label {
    background: rgba(201, 153, 60, 0.12);
    color: var(--theme-gold-1);
}

.legal-text-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    font-size: 0.88rem;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
}

.legal-text-label-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    font-weight: 700;
}

.legal-text-content {
    padding: 14px 16px;
}

.legal-paragraph {
    margin: 0 0 12px;
    text-align: justify;
    line-height: 1.9;
}

.legal-paragraph:last-child {
    margin-bottom: 0;
}

.legal-clause {
    margin: 0 0 10px;
    padding: 8px 12px 8px 14px;
    border-right: 3px solid var(--theme-gold);
    background: rgba(201, 153, 60, 0.06);
    border-radius: 0 6px 6px 0;
    text-align: justify;
    line-height: 1.85;
}

.legal-clause:last-child {
    margin-bottom: 0;
}

.legal-cancelled-notice {
    margin: 0;
    text-align: center;
    padding: 8px 0;
}

.meta-info {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.cost-breakdown {
    padding: 12px 14px;
    margin-bottom: 8px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-message);
}

.cost-total {
    font-size: 0.88rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.cost-total strong {
    color: var(--theme-primary-1);
    margin: 0 4px;
}

.cost-egp {
    color: var(--text-secondary);
    font-size: 0.82rem;
}

.cost-stages {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cost-stage {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 8px 12px;
    align-items: center;
    padding: 6px 8px;
    border-radius: 6px;
    background: rgba(95, 112, 48, 0.06);
    font-size: 0.8rem;
}

.cost-stage-unit {
    grid-column: 2 / -1;
    font-size: 0.72rem;
    color: var(--text-secondary);
    direction: ltr;
    text-align: left;
}

.cost-balance {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    direction: ltr;
    text-align: left;
}

.cost-error {
    color: var(--theme-danger-1);
}

.cost-stage-label {
    color: var(--text-primary);
    font-weight: 600;
}

.cost-stage-model {
    color: var(--theme-green);
    font-family: ui-monospace, Consolas, monospace;
    font-size: 0.75rem;
    direction: ltr;
    text-align: left;
}

.cost-stage-value {
    color: var(--theme-gold-1);
    font-weight: 700;
    direction: ltr;
    text-align: left;
}

.cost-note {
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.meta-stats {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

footer {
    background: var(--theme-footer);
    color: #e8e4dc;
    padding: 16px 24px 12px;
    flex-shrink: 0;
}

.input-area {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    max-width: 960px;
    margin: 0 auto;
}

#questionInput {
    flex: 1;
    background: var(--search-bar);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 1rem;
    resize: none;
    font-family: inherit;
    line-height: 1.5;
}

#questionInput:focus {
    outline: none;
    border-color: var(--theme-primary-light);
    box-shadow: 0 0 0 2px var(--theme-primary-o-50);
}

#sendBtn {
    background: var(--theme-gold);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.2s;
}

#sendBtn:hover:not(:disabled) {
    background: var(--theme-gold-1);
}

#sendBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.footer-note {
    text-align: center;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.65);
    margin-top: 12px;
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    max-width: 500px;
    width: 90%;
    position: relative;
    box-shadow: 0 4px 20px rgb(0 0 0 / 20%);
}

.modal-close {
    position: absolute;
    top: 12px;
    left: 12px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
}

.modal-content h3 {
    color: var(--theme-primary-1);
    margin-top: 0;
}

#statsContent {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
}

.error-message {
    color: var(--theme-danger-1);
    padding: 12px;
    background: rgba(255, 105, 105, 0.12);
    border-radius: 8px;
}

@media (max-width: 640px) {
    .header-brand {
        gap: 10px;
    }

    .header-logo {
        width: 44px;
        height: 44px;
    }

    .logo {
        font-size: 1rem;
    }

    .subtitle {
        font-size: 0.75rem;
    }

    .message-user {
        margin-left: 0;
    }

    .input-area {
        flex-direction: column;
        align-items: stretch;
    }

    #sendBtn {
        width: 100%;
    }
}