/* ============================================================================
   CHATBOT APPLICATION STYLES
   ============================================================================ */

/* ============================================================================
   CSS VARIABLES & RESET
   ============================================================================ */

* {
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-red: #fb1717;
    --color-blue: #3b609b;
    --color-blue-light: #00a2e9;
    --color-blue-dark: #1f3165;
    --color-blue-hover: #0095da;
    --color-white: #ffffff;
    --color-black: #333333;
    --color-black-20: rgba(51, 51, 51, 0.2);
    --color-black-40: #666666;
    --color-black-60: #999999;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    font-size: 16px;
    font-weight: 400;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.5;
    color: var(--color-black);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   MAIN CONTAINER
   ============================================================================ */

.chatbot {
    max-width: 896px;
    margin: 0 auto;
    padding: 12px;
    min-height: 100vh;
    height: 100vh;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

.chatbot-section {
    display: flex;
    flex-direction: column;
    background-color: var(--color-white);
    border-radius: 12px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* ============================================================================
   HEADER
   ============================================================================ */

.chat-header {
    padding: 16px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 8px;
    text-align: center;
}

.chat-header img {
    height: 40px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
}

.chat-header p {
    margin: 0;
    font-size: 14px;
    color: var(--color-black-40);
    font-weight: 500;
}

/* ============================================================================
   CHAT HISTORY
   ============================================================================ */

.chat-history {
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
    background-color: var(--color-white);
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 24px 20px;
    min-height: 0;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.chat-history::-webkit-scrollbar {
    width: 6px;
}

.chat-history::-webkit-scrollbar-track {
    background: transparent;
}

.chat-history::-webkit-scrollbar-thumb {
    background: var(--color-black-60);
    border-radius: 3px;
}

.chat-history::-webkit-scrollbar-thumb:hover {
    background: var(--color-black-40);
}

.chat-history:empty::before {
    content: "No messages yet. Start a conversation!";
    display: block;
    text-align: center;
    color: var(--color-black-60);
    padding: 40px 20px;
    font-size: 14px;
}

/* ============================================================================
   SLIDER
   ============================================================================ */

.slidecontainer {
    display: flex;
    justify-content: flex-end;
    padding: 12px 20px 0 20px;
    margin-bottom: 0;
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-info-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.slider {
    width: 200px;
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    border-radius: 4px;
    background: #e0e0e0;
    outline: none;
    transition: all var(--transition-base);
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-blue-light);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 2px solid var(--color-white);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--color-blue-hover);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.slider::-webkit-slider-thumb:active {
    transform: scale(1.05);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-blue-light);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 2px solid var(--color-white);
    -moz-appearance: none;
}

.slider::-moz-range-thumb:hover {
    background: var(--color-blue-hover);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.slider::-moz-range-thumb:active {
    transform: scale(1.05);
}

.slider::-moz-range-track {
    height: 8px;
    border-radius: 4px;
    background: #e0e0e0;
}

.slider:focus {
    outline: none;
}

.slider:focus::-webkit-slider-thumb {
    outline: 2px solid var(--color-blue-light);
    outline-offset: 2px;
}

.slider:focus::-moz-range-thumb {
    outline: 2px solid var(--color-blue-light);
    outline-offset: 2px;
}

.slider-value {
    min-width: 40px;
    padding: 6px 12px;
    background-color: var(--color-blue-light);
    color: var(--color-white);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.slider-wrapper:hover .slider-value {
    background-color: var(--color-blue-hover);
    box-shadow: var(--shadow-md);
}

.info-icon-wrapper {
    position: relative;
    display: inline-flex;
    flex-direction: row-reverse;
    align-items: center;
    gap: 8px;
}

.info-icon {
    color: var(--color-black-60);
    font-size: 14px;
    cursor: help;
    transition: color var(--transition-base);
}

.info-icon:hover {
    color: var(--color-blue-light);
}

.info-tooltip {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.info-tooltip::after {
    display: none;
}

.info-icon-wrapper:hover .info-tooltip {
    opacity: 1;
}

/* ============================================================================
   MESSAGES
   ============================================================================ */

.message {
    display: flex;
    max-width: 75%;
    gap: 8px;
    align-items: flex-start;
    animation: messageSlideIn 0.3s ease-out;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.message.bot {
    align-self: flex-start;
}

.message .bubble {
    border-radius: 16px;
    padding: 10px 14px;
    color: white;
    display: flex;
    align-items: center;
    word-wrap: break-word;
    word-break: break-word;
    line-height: 1.4;
    box-shadow: var(--shadow-sm);
}

.message.user .bubble {
    background-color: var(--color-blue-light);
}

.message.bot .bubble {
    background-color: var(--color-blue-dark);
}

.avatar {
    border-radius: 50%;
    height: 32px;
    width: 32px;
    min-width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.avatar .lucide-icon {
    width: 18px;
    height: 18px;
}

.message.user .avatar {
    background-color: var(--color-blue-light);
}

.message.bot .avatar {
    background-color: var(--color-blue-dark);
}

/* ============================================================================
   TYPING INDICATOR
   ============================================================================ */

.typing-indicator .bubble {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 14px;
    border-radius: 16px;
    background-color: var(--color-blue-dark);
    box-shadow: var(--shadow-sm);
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: white;
    opacity: 0.4;
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    30% {
        opacity: 1;
        transform: scale(1.2);
    }
}

/* ============================================================================
   EXAMPLE QUESTIONS
   ============================================================================ */

.chat-example {
    display: flex;
    flex-direction: column;
    padding: 16px;
    background-color: #f8f9fa;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    flex-shrink: 0;
}

.chat-example p {
    font-weight: 500;
    margin: 0 0 10px 0;
    padding: 0;
    font-size: 13px;
    color: var(--color-black-40);
}

.chat-example ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    gap: 8px;
    margin: 0;
}

.chat-example ul li {
    padding: 8px 12px;
    background-color: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    color: var(--color-black);
    font-size: 13px;
    font-weight: 400;
    cursor: pointer;
    transition: all var(--transition-base);
    user-select: none;
    box-shadow: var(--shadow-sm);
}

.chat-example ul li:hover {
    background-color: var(--color-blue-light);
    color: var(--color-white);
    border-color: var(--color-blue-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.chat-example ul li:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.chat-example ul li:focus {
    outline: 2px solid var(--color-blue-light);
    outline-offset: 2px;
}

/* ============================================================================
   INPUT SECTION
   ============================================================================ */

.chat-input {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    padding: 16px;
    gap: 10px;
    background-color: white;
    flex-shrink: 0;
}

.chat-input .input-box {
    flex: 1;
    border-radius: 24px;
    padding: 12px 16px;
    background-color: #f3f3f5;
    line-height: 1.5;
    border: 2px solid transparent;
    outline: none;
    font-size: 14px;
    font-weight: 400;
    font-family: inherit;
    color: var(--color-black);
    transition: all var(--transition-base);
    resize: none;
}

.chat-input .input-box:focus {
    background-color: var(--color-white);
    border-color: var(--color-blue-light);
    box-shadow: 0 0 0 3px rgba(0, 162, 233, 0.1);
    outline: none;
}

.chat-input .input-box:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.chat-input .input-box::placeholder {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-black-60);
}

.chat-input button {
    font-size: 16px;
    color: var(--color-white);
    padding: 12px 16px;
    min-width: 44px;
    min-height: 44px;
    border-radius: 50%;
    background-color: var(--color-blue-light);
    cursor: pointer;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.chat-input button:hover:not(:disabled) {
    background-color: var(--color-blue-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.chat-input button:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.chat-input button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.chat-input button:focus {
    outline: 2px solid var(--color-blue-light);
    outline-offset: 2px;
}

.send-btn.loading .send-icon {
    display: none;
}

.send-btn.loading::after {
    content: "";
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-white);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: inline-block;
}

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

/* ============================================================================
   ACCESSIBILITY & UTILITIES
   ============================================================================ */

*:focus-visible {
    outline: 2px solid var(--color-blue-light);
    outline-offset: 2px;
}

.send-btn {
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 768px) {
    .chatbot {
        padding: 8px;
        height: 100dvh;
    }

    .chatbot-section {
        border-radius: 8px;
    }

    .chat-header {
        padding: 12px 8px;
        margin-bottom: 8px;
    }

    .chat-header img {
        height: 32px;
    }

    .chat-header p {
        font-size: 13px;
    }

    .chat-history {
        padding: 16px 12px;
        gap: 10px;
    }

    .slidecontainer {
        padding: 10px 12px 0 12px;
    }

    .slider-wrapper {
        gap: 10px;
    }

    .slider {
        width: 160px;
    }

    .info-icon {
        font-size: 13px;
    }

    .info-tooltip {
        font-size: 11px;
        padding: 5px 8px;
    }

    .slider-value {
        min-width: 36px;
        padding: 5px 10px;
        font-size: 13px;
    }

    .message {
        max-width: 85%;
        gap: 6px;
    }

    .chat-example {
        padding: 12px;
    }

    .chat-input {
        padding: 12px;
        gap: 8px;
    }

    .chat-input .input-box {
        padding: 10px 14px;
        font-size: 14px;
    }

    .chat-input button {
        padding: 10px 14px;
        min-width: 40px;
        min-height: 40px;
    }
}

@media (max-width: 480px) {
    .chatbot {
        padding: 4px;
    }

    .chat-history {
        padding: 12px 8px;
        gap: 8px;
    }

    .slidecontainer {
        padding: 8px 8px 0 8px;
    }

    .slider-wrapper {
        gap: 8px;
    }

    .slider {
        width: 140px;
    }

    .slider-info-wrapper {
        gap: 6px;
    }

    .info-icon {
        font-size: 12px;
    }

    .info-tooltip {
        font-size: 10px;
        padding: 4px 6px;
    }

    .slider-value {
        min-width: 32px;
        padding: 4px 8px;
        font-size: 12px;
    }

    .message {
        max-width: 90%;
        gap: 6px;
    }

    .avatar {
        height: 28px;
        width: 28px;
        min-width: 28px;
    }

    .avatar .lucide-icon {
        width: 16px;
        height: 16px;
    }

    .chat-example {
        padding: 10px 8px;
    }

    .chat-example ul li {
        padding: 6px 10px;
        font-size: 12px;
    }

    .chat-input {
        padding: 10px 8px;
    }

    .chat-input .input-box {
        padding: 10px 12px;
        font-size: 13px;
    }

    .chat-input button {
        padding: 10px;
        min-width: 40px;
        min-height: 40px;
    }
}