/* Leksa design system – brand palette (tulip-tree, mariner, lochinvar, nile-blue, sundance, curious-blue, elm, buttercup) */
:root {
    /* HEX reference */
    --leksa-tulip-tree: #e5ae36;
    --leksa-mariner: #247ac6;
    --leksa-lochinvar: #269091;
    --leksa-nile-blue: #1a495b;
    --leksa-sundance: #c3a856;
    --leksa-curious-blue: #24a5d0;
    --leksa-elm: #21727d;
    --leksa-buttercup: #f5bd1e;
    /* Semantic (HSL for hsl(var())): nile-blue primary, elm primary-dark, buttercup mustard accent */
    --leksa-primary: 197 56% 23%;
    --leksa-primary-dark: 187 41% 31%;
    --leksa-secondary: 45 91% 54%;
    --leksa-mustard: 45 91% 54%;
    --leksa-accent: 181 41% 36%;
    --leksa-background: 40 33% 98%;
    --leksa-foreground: 197 45% 15%;
    --leksa-muted: 40 20% 94%;
    --leksa-muted-foreground: 197 25% 42%;
    --leksa-card: 0 0% 100%;
    --leksa-border: 40 18% 88%;
    --leksa-radius: 0.75rem;
    --leksa-radius-lg: 1rem;
    --leksa-radius-xl: 1.5rem;
    --leksa-sidebar-width: 18rem;
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

.leksa-app {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: linear-gradient(180deg, hsl(var(--leksa-background)) 0%, hsl(var(--leksa-card)) 50%, hsl(200 30% 98%) 100%);
    color: hsl(var(--leksa-foreground));
    height: 100%;
    min-height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Layout – no page scroll; only inner content scrolls */
.leksa-layout {
    flex: 1;
    height: 100%;
    min-height: 0;
}

.leksa-main {
    min-width: 0;
    min-height: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.leksa-content {
    flex: 1;
    min-height: 0;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Sidebar – single scroll region for recent chats, no clipping */
.leksa-sidebar {
    width: var(--leksa-sidebar-width);
    height: 100vh;
    max-height: 100vh;
    min-height: 0;
    background: linear-gradient(180deg, hsl(var(--leksa-muted)) 0%, hsl(var(--leksa-card)) 100%);
    border-right: 1px solid hsl(var(--leksa-border));
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.leksa-sidebar .recent-section {
    min-height: 0;
    flex: 1 1 auto;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

.leksa-sidebar .logo-box {
    width: 40px;
    height: 40px;
    border-radius: var(--leksa-radius);
    background: linear-gradient(135deg, hsl(var(--leksa-primary)) 0%, hsl(var(--leksa-primary-dark)) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px hsl(var(--leksa-primary) / 0.3);
}

.leksa-sidebar .brand-gradient {
    background: linear-gradient(135deg, hsl(var(--leksa-primary)) 0%, hsl(var(--leksa-primary-dark)) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
}

.leksa-sidebar .btn-new-chat {
    background: linear-gradient(135deg, hsl(var(--leksa-mustard)) 0%, hsl(43 77% 50%) 100%);
    color: hsl(var(--leksa-primary));
    border: none;
    border-radius: var(--leksa-radius);
    padding: 0.6rem 1rem;
    font-weight: 600;
    box-shadow: 0 4px 14px hsl(var(--leksa-mustard) / 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.leksa-sidebar .btn-new-chat:hover {
    color: hsl(var(--leksa-primary));
    transform: translateY(-1px);
    box-shadow: 0 6px 20px hsl(var(--leksa-mustard) / 0.5);
}

.leksa-sidebar .recent-item {
    border-radius: var(--leksa-radius);
    padding: 0.6rem 0.75rem;
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    min-height: 2.5em;
    line-height: 1.4;
    overflow: visible;
}

.leksa-sidebar #leksa-recent-chats {
    overflow: visible;
    min-height: 0;
}

.leksa-sidebar .recent-item:hover {
    background: hsl(var(--leksa-card));
    box-shadow: 0 2px 8px hsl(var(--leksa-foreground) / 0.06);
    transform: scale(1.01);
}

.leksa-sidebar .recent-item .recent-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--leksa-radius);
    background: hsl(var(--leksa-primary) / 0.12);
    color: hsl(var(--leksa-primary));
    display: flex;
    align-items: center;
    justify-content: center;
}

.leksa-sidebar .footer-box {
    background: linear-gradient(135deg, hsl(var(--leksa-mustard) / 0.08) 0%, hsl(var(--leksa-primary) / 0.06) 100%);
    border: 1px solid hsl(var(--leksa-mustard) / 0.25);
    border-radius: var(--leksa-radius);
    padding: 0.75rem 1rem;
}

/* Header */
.leksa-header {
    height: 64px;
    background: hsl(var(--leksa-card) / 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid hsl(var(--leksa-border));
    box-shadow: 0 1px 3px hsl(var(--leksa-foreground) / 0.05);
}

.leksa-header .logo-sm {
    width: 32px;
    height: 32px;
    border-radius: calc(var(--leksa-radius) - 2px);
    background: linear-gradient(135deg, hsl(var(--leksa-primary)) 0%, hsl(var(--leksa-primary-dark)) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Empty state */
.leksa-empty .hero-logo {
    width: 96px;
    height: 96px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
}

.leksa-empty .hero-title {
    background: linear-gradient(135deg, hsl(var(--leksa-foreground)) 0%, hsl(var(--leksa-muted-foreground)) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 2rem;
    line-height: 1.3;
    padding-bottom: 0.1em;
    overflow: visible;
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
}

.leksa-empty .feature-badge {
    background: hsl(var(--leksa-mustard) / 0.15);
    color: hsl(43 60% 35%);
    border-radius: 9999px;
    padding: 0.35rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Topic cards */
.leksa-topic-card {
    background: hsl(var(--leksa-card));
    border: 1px solid hsl(var(--leksa-border));
    border-radius: var(--leksa-radius);
    padding: 1.25rem;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.leksa-topic-card:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 25px hsl(var(--leksa-foreground) / 0.08);
}

.leksa-topic-card .topic-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--leksa-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Disclaimer */
.leksa-disclaimer {
    background: linear-gradient(135deg, hsl(38 92% 96%) 0%, hsl(30 90% 95%) 100%);
    border: 1px solid hsl(38 92% 80%);
    border-radius: 1rem;
    padding: 1.5rem;
}

.leksa-disclaimer .disclaimer-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--leksa-radius);
    background: hsl(38 92% 90%);
    color: hsl(38 70% 40%);
    display: flex;
    align-items: center;
    justify-content: center;
}


/* Messages – compatibility with JS-created .message */
.message {
    display: flex;
    gap: 0.75rem;
    animation: leksa-fade-up 0.5s ease-out;
}

.message.user {
    flex-direction: row-reverse;
}

.message .message-avatar {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message.user .message-avatar {
    color: hsl(var(--leksa-primary));
}

.message.assistant .message-avatar {
    background: none;
}

.message .message-content {
    max-width: 75%;
    padding: 0.75rem 1.25rem;
    border-radius: var(--leksa-radius-xl);
    line-height: 1.6;
}

.message.user .message-content {
    background: linear-gradient(135deg, hsl(var(--leksa-primary)) 0%, hsl(var(--leksa-primary-dark)) 100%);
    color: white;
    box-shadow: 0 4px 14px hsl(var(--leksa-primary) / 0.3);
}

.message.assistant .message-content {
    background: hsl(var(--leksa-card));
    border: 1px solid hsl(var(--leksa-border));
    color: hsl(var(--leksa-foreground));
    box-shadow: 0 1px 3px hsl(var(--leksa-foreground) / 0.06);
}

.message.assistant .message-content:hover {
    box-shadow: 0 4px 12px hsl(var(--leksa-foreground) / 0.08);
}

.message-content .assistant-paragraph,
.message .message-content .assistant-paragraph {
    margin: 0 0 1rem 0;
    line-height: 1.6;
}

.message-content .assistant-paragraph:last-child,
.message .message-content .assistant-paragraph:last-child {
    margin-bottom: 0;
}

.message-content .assistant-list,
.message .message-content .assistant-list {
    margin: 0.75rem 0 1rem 0;
    padding-left: 1.25rem;
    line-height: 1.5;
}

.message-content .assistant-list li,
.message .message-content .assistant-list li {
    display: list-item;
    margin-bottom: 0.75em;
    line-height: 1.6;
}

.message-content .assistant-list li:last-child,
.message .message-content .assistant-list li:last-child {
    margin-bottom: 0;
}

.leksa-input-hint {
    color: hsl(var(--leksa-muted-foreground));
    font-weight: 500;
}

.leksa-input-hint kbd {
    background: hsl(var(--leksa-muted));
    color: hsl(var(--leksa-foreground));
    padding: 0.15em 0.4em;
    border-radius: 0.25rem;
    font-size: 0.8em;
    border: 1px solid hsl(var(--leksa-border));
}

/* Messages */
.leksa-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1024px;
    margin: 0 auto;
    width: 100%;
}

.leksa-empty-state {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
}

/* Prevent empty state content from being clipped */
.leksa-empty-state .leksa-empty {
    width: 100%;
    max-width: 800px;
    margin: auto;
    padding: 2rem;
}

.leksa-message {
    display: flex;
    gap: 0.75rem;
    animation: leksa-fade-up 0.5s ease-out;
}

.leksa-message.user {
    flex-direction: row-reverse;
}

.leksa-message .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.leksa-message.user .avatar {
    color: hsl(var(--leksa-primary));
}

.leksa-message.assistant .avatar {
    background: none;
}

.leksa-message .bubble {
    max-width: 75%;
    padding: 0.75rem 1.25rem;
    border-radius: var(--leksa-radius-xl);
    line-height: 1.6;
}

.leksa-message.user .bubble {
    background: linear-gradient(135deg, hsl(var(--leksa-primary)) 0%, hsl(var(--leksa-primary-dark)) 100%);
    color: white;
    box-shadow: 0 4px 14px hsl(var(--leksa-primary) / 0.3);
}

.leksa-message.assistant .bubble {
    background: hsl(var(--leksa-card));
    border: 1px solid hsl(var(--leksa-border));
    color: hsl(var(--leksa-foreground));
    box-shadow: 0 1px 3px hsl(var(--leksa-foreground) / 0.06);
}

.leksa-message.assistant .bubble:hover {
    box-shadow: 0 4px 12px hsl(var(--leksa-foreground) / 0.08);
}

.leksa-message .timestamp {
    font-size: 0.7rem;
    color: hsl(var(--leksa-muted-foreground));
    margin-top: 0.25rem;
}

.leksa-message.user .timestamp {
    text-align: right;
}

/* Typing indicator */
.leksa-typing .typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: hsl(var(--leksa-muted-foreground));
    animation: leksa-bounce 1.4s ease-in-out infinite both;
}

.leksa-typing .typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.leksa-typing .typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes leksa-bounce {

    0%,
    80%,
    100% {
        transform: scale(0);
    }

    40% {
        transform: scale(1);
    }
}

@keyframes leksa-fade-up {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

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

/* Input area */
.leksa-input-area {
    background: hsl(var(--leksa-card) / 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid hsl(var(--leksa-border));
    padding: 1.5rem;
}

.leksa-input-area .input-wrapper {
    max-width: 1024px;
    margin: 0 auto;
    position: relative;
}

.leksa-input-area textarea {
    border-radius: var(--leksa-radius-xl);
    border: 1px solid hsl(var(--leksa-border));
    padding: 0.75rem 1rem 0.75rem 1rem;
    min-height: 52px;
    resize: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.leksa-input-area textarea:focus {
    border-color: hsl(var(--leksa-primary));
    box-shadow: 0 0 0 3px hsl(var(--leksa-primary) / 0.15);
    outline: none;
}

.leksa-input-area .btn-send {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    width: 40px;
    height: 40px;
    border-radius: var(--leksa-radius);
    background: linear-gradient(135deg, hsl(var(--leksa-mustard)) 0%, hsl(43 77% 50%) 100%);
    color: hsl(var(--leksa-primary));
    border: none;
    box-shadow: 0 2px 10px hsl(var(--leksa-mustard) / 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.leksa-input-area .btn-send:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 4px 14px hsl(var(--leksa-mustard) / 0.5);
}

.leksa-input-area .btn-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.leksa-input-area kbd {
    padding: 0.15rem 0.5rem;
    font-size: 0.7rem;
    background: hsl(var(--leksa-muted));
    border: 1px solid hsl(var(--leksa-border));
    border-radius: 4px;
    font-family: inherit;
}

/* Responsive */
@media (max-width: 991.98px) {
    .leksa-sidebar {
        display: none;
    }
}

/* Typing indicator and loading */
.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: hsl(var(--leksa-muted-foreground));
    font-size: 0.9rem;
}

.typing-indicator .dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    animation: leksa-bounce 1.2s ease-in-out infinite both;
}

.typing-indicator .dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator .dots span:nth-child(3) {
    animation-delay: 0.4s;
}

.loading {
    display: inline-flex;
    gap: 0.25rem;
}

.loading span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: leksa-bounce 1.4s ease-in-out infinite both;
}

.loading span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading span:nth-child(3) {
    animation-delay: 0.4s;
}

.stage-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: opacity 0.2s ease;
}

.stage-text.fade-out {
    opacity: 0;
}

.assistant-actions {
    margin-top: 0.75rem;
}

.leksa-btn {
    background: linear-gradient(135deg, hsl(var(--leksa-primary)) 0%, hsl(var(--leksa-primary-dark)) 100%);
    color: #fff;
    border: none;
    border-radius: calc(var(--leksa-radius) - 2px);
    padding: 0.5rem 1rem;
    font-weight: 600;
    box-shadow: 0 0 30px hsl(var(--leksa-primary) / 0.2);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.leksa-btn:hover {
    color: #fff;
    transform: scale(1.01);
}

.rag-debug {
    font-size: 0.8rem;
    color: #666;
}

@media (max-width: 767.98px) {
    .leksa-message .bubble {
        max-width: 85%;
    }
}