:root {
    --card: #FFFFFF;
    --border: rgba(0,0,0,0.08);
    --primary-blue: #007AFF;
    --primary-blue-light: #34A8FF;
    --system-blue: #007AFF;
    --accent-brown: #8E8E93;
    
    --bg-body: #F2F2F7;
    --bg-container: #FFFFFF;
    --bg-message-bot: #E9E9EF;
    --bg-input: #FFFFFF;
    --bg-suggestion: #E9E9EF;
    --bg-header: rgba(255, 255, 255, 0.92);
    --bg-delivery: #F2F2F7;
    
    --text-primary: #000000;
    --text-secondary: #8E8E93;
    --text-tertiary: #C6C6C8;
    --text-inverse: #FFFFFF;
    --text-logo: #000000;
    
    --border-light: rgba(60, 60, 67, 0.08);
    --border-medium: rgba(60, 60, 67, 0.12);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.05);
    
    --scrollbar-thumb: rgba(0, 0, 0, 0.15);
    --scrollbar-thumb-hover: rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] {
     --card: #1C1C1E;
    --border: rgba(255,255,255,0.08);
    --primary-blue: #0A84FF;
    --primary-blue-light: #5E5CE6;
    --system-blue: #0A84FF;
    --accent-brown: #8E8E93;
    
    --bg-body: #000000;
    --bg-container: #1C1C1E;
    --bg-message-bot: #2C2C2E;
    --bg-input: #1C1C1E;
    --bg-suggestion: #2C2C2E;
    --bg-header: rgba(28, 28, 30, 0.92);
    --bg-delivery: #1C1C1E;
    
    --text-primary: #FFFFFF;
    --text-secondary: #8E8E93;
    --text-tertiary: #545458;
    --text-inverse: #FFFFFF;
    --text-logo: #FFFFFF;
    
    --border-light: rgba(84, 84, 88, 0.2);
    --border-medium: rgba(84, 84, 88, 0.3);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
    
    --scrollbar-thumb: rgba(255, 255, 255, 0.15);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.25);
}

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

@media (min-width: 600px) {
    body {
        font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        background: var(--bg-body);
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 20px;
        transition: background 0.3s ease;
    }

    .chat_container {
        width: 800px;
        max-width: 90%;
        max-height: 95vh;
        height: auto;
        background: var(--bg-container);
        border-radius: 28px;
        display: flex;
        flex-direction: column;
        overflow: hidden;
        box-shadow: var(--shadow-lg), 0 0 0 0.5px var(--border-medium);
        transition: background 0.3s ease, box-shadow 0.3s ease;
        animation: slideUp 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    }

    @keyframes slideUp {
        from {
            opacity: 0;
            transform: translateY(30px) scale(0.98);
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }

    .chat_header {
        background: var(--bg-header);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 0.5px solid var(--border-medium);
        padding: 16px 20px;
        position: sticky;
        top: 0;
        z-index: 10;
        transition: background 0.3s ease;
    }

    .header_content {
        display: flex;
        justify-content: flex-start;
        align-items: center;
        margin-bottom: 16px;
        flex-wrap: wrap;
        gap: 15px;
    }

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

    .logo_icon {
        font-size: 38px;
        animation: gentleBounce 2s ease-in-out infinite;
    }

    @keyframes gentleBounce {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-3px); }
    }

    .logo_text h1 {
        font-size: 22px;
        font-weight: 700;
        color: var(--text-logo);
        letter-spacing: -0.3px;
        margin-bottom: 4px;
    }

    .logo_text p {
        font-size: 12px;
        color: var(--text-secondary);
        font-weight: 500;
        letter-spacing: -0.2px;
    }

    .theme_icon {
        font-size: 14px;
    }

    .theme_label {
        font-size: 13px;
        font-weight: 500;
    }

    .delivery_info {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
        font-size: 11px;
        padding: 10px 16px;
        background: var(--bg-delivery);
        border-radius: 30px;
        margin-top: 4px;
    }

    .delivery_info span {
        display: flex;
        align-items: center;
        gap: 6px;
        color: var(--primary-blue);
        font-weight: 500;
    }

    .delivery_info span:first-child {
        color: var(--text-secondary);
    }

    .delivery_icon, .truck_icon {
        font-size: 12px;
    }

    .messages_area {
        flex: 1;
        min-height: 0;
        overflow-y: auto;
        padding: 16px 12px;
        background: var(--bg-container);
        display: flex;
        flex-direction: column;
        gap: 12px;
        transition: background 0.3s ease;
    }

    .messages_area::-webkit-scrollbar {
        width: 5px;
    }

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

    .messages_area::-webkit-scrollbar-thumb {
        background: var(--scrollbar-thumb);
        border-radius: 10px;
    }

    .messages_area::-webkit-scrollbar-thumb:hover {
        background: var(--scrollbar-thumb-hover);
    }

    .message_bot {
        display: flex;
        gap: 10px;
        animation: fadeIn 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    }

    .message_user {
        display: flex;
        gap: 10px;
        flex-direction: row-reverse;
        animation: fadeIn 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    }

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

    .message_avatar {
        width: 36px;
        height: 36px;
        background: linear-gradient(135deg, var(--primary-blue) 0%, var(--system-blue) 100%);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        flex-shrink: 0;
        box-shadow: var(--shadow-sm);
    }

    .message_user .message_avatar {
        background: linear-gradient(135deg, var(--primary-blue-light) 0%, var(--primary-blue) 100%);
    }

    .message_text {
        max-width: min(75%, 600px);
        border-radius: 18px;
        font-size: 16px;
        line-height: 1.45;
        letter-spacing: -0.2px;
        transition: background 0.3s ease, color 0.3s ease;
        word-wrap: break-word;
        overflow-wrap: anywhere;
        white-space: normal;
    }

    .message_bot .message_text {
        background: var(--bg-message-bot);
        color: var(--text-primary);
        border-bottom-left-radius: 4px;
    }

    .message_user .message_text {
        background: linear-gradient(135deg, var(--primary-blue) 0%, var(--system-blue) 100%);
        color: var(--text-inverse);
        border-bottom-right-radius: 4px;
    }

    .suggestions {
        padding: 10px 16px;
        background: var(--bg-header);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-top: 0.5px solid var(--border-medium);
        margin-bottom: 6px;
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
        transition: background 0.3s ease;
    }

    .suggestion_btn {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 8px 16px;
        background: var(--bg-suggestion);
        border: none;
        border-radius: 30px;
        cursor: pointer;
        font-size: 13px;
        font-weight: 500;
        color: var(--primary-blue);
        transition: all 0.2s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    }

    .suggestion_btn:active {
        transform: scale(0.98);
    }

    .input_area {
        padding: 12px 16px;
        background: var(--bg-header);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-top: 0.5px solid var(--border-medium);
        display: flex;
        gap: 10px;
        transition: background 0.3s ease;
    }

    .input_area input {
        flex: 1;
        padding: 12px 16px;
        background: var(--bg-input);
        border: 0.5px solid var(--border-light);
        border-radius: 30px;
        outline: none;
        font-size: 16px;
        font-family: inherit;
        transition: all 0.2s ease;
        color: var(--text-primary);
    }

    .input_area input:focus {
        background: var(--bg-container);
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.1);
    }

    .input_area input::placeholder {
        color: var(--text-secondary);
        font-weight: 400;
    }

    .input_area button {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 12px 22px;
        background: linear-gradient(135deg, var(--primary-blue) 0%, var(--system-blue) 100%);
        color: white;
        border: none;
        border-radius: 30px;
        cursor: pointer;
        font-weight: 600;
        font-size: 14px;
        transition: all 0.2s cubic-bezier(0.2, 0.9, 0.4, 1.1);
        box-shadow: var(--shadow-sm);
    }

    .input_area button:active {
        transform: scale(0.98);
    }

    .typing_indicator {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 10px 14px;
        background: var(--bg-message-bot);
        border-radius: 18px;
        border-bottom-left-radius: 4px;
        width: fit-content;
        transition: background 0.3s ease;
    }

    .typing_dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--text-secondary);
        animation: typing 1.4s infinite ease-in-out;
    }

    .typing_dot:nth-child(1) { animation-delay: 0s; }
    .typing_dot:nth-child(2) { animation-delay: 0.2s; }
    .typing_dot:nth-child(3) { animation-delay: 0.4s; }

    @keyframes typing {
        0%, 60%, 100% {
            transform: translateY(0);
            opacity: 0.4;
        }
        30% {
            transform: translateY(-6px);
            opacity: 1;
        }
    }

    .status_dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: #34C759;
        display: inline-block;
        animation: pulse 2s infinite;
    }

    @keyframes pulse {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.5; }
    }

    .status_dot.offline {
        background: var(--text-secondary);
        animation: none;
    }

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

.theme_switch {
    position: fixed;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card);
    padding: 8px 14px;
    border-radius: 30px;
    cursor: pointer;
    border: 1px solid var(--border);
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.switch_track {
    width: 44px;
    height: 22px;
    background: #8E8E93;
    border-radius: 20px;
    position: relative;
}

.switch_thumb {
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

[data-theme="dark"] .switch_thumb {
    transform: translateX(22px);
}

@media (max-width: 600px) {
    html, body {
        height: 100%;
        overflow: hidden;
        width: 100%;
        font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        background: var(--bg-body);
        background-color: var(--bg-body);
    }

    body {
        margin: 0;
        padding: 0;
    }

    .chat_container {
        position: relative;
        width: 100%;
        height: var(--app-height);
        display: flex;
        flex-direction: column;
        background: var(--bg-container);
    }

    .chat_header {
        flex-shrink: 0;
        background: var(--bg-header);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
        padding: calc(env(safe-area-inset-top, 0px) + 16px) 16px 14px 16px;
        border-bottom: 0.33px solid var(--border-medium);
        box-shadow: 0 1px 0 var(--border-light);
    }

    .header_content {
        display: flex;
        justify-content: flex-start;
        align-items: flex-start;
        margin-bottom: 14px;
        gap: 14px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .logo_icon {
        font-size: 28px;
        animation: gentleBounce 2s ease-in-out infinite;
    }

    @keyframes gentleBounce {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-2px); }
    }

    .logo_text h1 {
        font-size: 18px;
        font-weight: 600;
        color: var(--text-logo);
        margin-bottom: 2px;
    }

    .logo_text p {
        font-size: 10px;
        color: var(--text-secondary);
    }

    .theme_icon {
        font-size: 14px;
    }

    .theme_label {
        font-size: 13px;
        font-weight: 500;
    }

    .delivery_info {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 14px;
        font-size: 11px;
        padding: 8px 12px;
        background: var(--bg-delivery);
        border-radius: 24px;
        margin-top: 6px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    .delivery_info::-webkit-scrollbar {
        height: 3px;
    }

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

    .delivery_info::-webkit-scrollbar-thumb {
        background: var(--scrollbar-thumb);
        border-radius: 10px;
    }

    .delivery_info span {
        display: flex;
        align-items: center;
        gap: 5px;
        color: var(--primary-blue);
        font-weight: 500;
        white-space: nowrap;
        flex-shrink: 0;
        font-size: 11px;
    }

    .delivery_info span:first-child {
        color: var(--text-secondary);
    }

    .delivery_icon, .truck_icon {
        font-size: 11px;
    }

    .messages_area {
        flex: 1;
        min-height: 0;
        overflow-y: auto;
        padding: 12px 12px;
        background: var(--bg-body);
        display: flex;
        flex-direction: column;
        gap: 12px;
        -webkit-overflow-scrolling: touch;
        scroll-behavior: smooth;
    }

    .messages_area::-webkit-scrollbar {
        width: 5px;
    }

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

    .messages_area::-webkit-scrollbar-thumb {
        background: var(--scrollbar-thumb);
        border-radius: 10px;
    }

    .message_bot {
        display: flex;
        gap: 10px;
        animation: messageSlideInMobile 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1) forwards;
    }

    .message_user {
        padding: 5px;
        display: flex;
        gap: 10px;
        flex-direction: row-reverse;
        animation: messageSlideInMobile 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1) forwards;
    }

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

    .message_avatar {
        width: 32px;
        height: 32px;
        background: var(--bg-message-bot);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        flex-shrink: 0;
        box-shadow: var(--shadow-sm);
    }

    .message_user .message_avatar {
        background: var(--primary-blue);
    }

    .message_bot .message_text {
        background: var(--bg-message-bot);
        color: var(--text-primary);
        border-bottom-left-radius: 4px;
        border: 0.33px solid var(--border-light);
    }

    .message_user .message_text {
        background: var(--primary-blue);
        color: var(--text-inverse);
        border-bottom-right-radius: 4px;
    }

    .message_text {
        max-width: min(75%, 600px);
        border-radius: 18px;
        font-size: 15px;
        line-height: 1.45;
        word-wrap: break-word;
        overflow-wrap: anywhere;
        white-space: normal;
    }

    .suggestions {
        flex-shrink: 0;
        padding: 10px 16px;
        background: var(--bg-header);
        backdrop-filter: blur(25px);
        border-top: 0.33px solid var(--border-medium);
        display: flex;
        gap: 8px;
        overflow-x: auto;
        white-space: nowrap;
        scrollbar-width: thin;
    }

    .suggestions::-webkit-scrollbar {
        height: 3px;
    }

    .suggestion_btn {
        flex: 0 0 auto;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 8px 14px;
        background: var(--bg-suggestion);
        border: 0.33px solid var(--border-light);
        border-radius: 24px;
        cursor: pointer;
        font-size: 12px;
        font-weight: 500;
        color: var(--primary-blue);
    }

    .input_area {
        flex-shrink: 0;
        padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
        background: transparent;
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        border-top: 0.5px solid rgba(128, 128, 128, 0.2);
        display: flex;
        align-items: center;
        gap: 10px;
    }

    [data-theme="dark"] .input_area {
        background: transparent;
        border-top: 0.5px solid rgba(255, 255, 255, 0.08);
    }

    .input_area:focus-within {
        backdrop-filter: blur(35px);
        -webkit-backdrop-filter: blur(35px);
    }

    .input_area input {
        flex: 1;
        height: 44px;
        padding: 0 16px;
        background: rgba(128, 128, 128, 0.12);
        border: none;
        border-radius: 999px;
        outline: none;
        font-size: 16px;
        font-weight: 400;
        color: var(--text-primary);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }

    [data-theme="dark"] .input_area input {
        background: rgba(255, 255, 255, 0.08);
    }

    .input_area input:focus {
        background: rgba(128, 128, 128, 0.18);
        border: none;
        box-shadow: none;
    }

    .input_area input::placeholder {
        color: var(--text-secondary);
        font-weight: 400;
        font-size: 15px;
    }

    .input_area button {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        border: none;
        background: rgba(0, 122, 255, 0.9);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        flex-shrink: 0;
    }

    [data-theme="dark"] .input_area button {
        background: rgba(10, 132, 255, 0.9);
    }

    .input_area button:active {
        transform: scale(0.96);
    }

    .input_area button span:last-child {
        display: none;
    }

    .message_bot .message_text,
    .message_user .message_text {
        animation: messageSlideInMobile 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1) forwards;
        opacity: 0;
        transform: translateY(12px);
    }

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

    .material_card {
        animation: cardAppear 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    }

    @keyframes cardAppear {
        from {
            opacity: 0;
            transform: scale(0.98);
        }
        to {
            opacity: 1;
            transform: scale(1);
        }
    }
}

@media (max-width: 768px) {
    .theme_switch {
        top: 12px;
        right: 12px;
        padding: 6px 12px;
    }
}

@media (max-width: 380px) {
    .chat_header {
        padding: calc(env(safe-area-inset-top, 0px) + 10px) 14px 10px 14px;
    }

    .logo_text h1 {
        font-size: 16px;
    }

    .logo_text p {
        font-size: 9px;
    }

    .logo_icon {
        font-size: 24px;
    }

    .theme_label {
        display: none;
    }

    .delivery_info {
        gap: 10px;
        font-size: 10px;
        padding: 6px 10px;
    }

    .delivery_info span {
        font-size: 10px;
    }

    .message_text {
        font-size: 14px;
    }

    .suggestions {
        padding: 8px 12px;
        gap: 6px;
    }

    .suggestion_btn {
        padding: 6px 12px;
        font-size: 11px;
    }

    .input_area {
        padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
        gap: 6px;
    }

    .input_area input {
        padding: 8px 12px;
        font-size: 14px;
    }

    .input_area input::placeholder {
        font-size: 13px;
    }

    .input_area button {
        padding: 8px 12px;
        font-size: 12px;
    }

    .input_area button span:last-child {
        display: none;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    .chat_container {
        max-width: 750px;
    }

    .delivery_info {
        gap: 16px;
    }
}

body {
    overflow: hidden;
    width: 100%;
    height: 100%;
    overscroll-behavior: none;
}

.chat_container,
.messages_area,
.input_area {
    max-width: 100%;
    overflow-x: hidden;
}

.message_bot .message_text {
    width: fit-content;
}

.message_text:has(.material_card) {
    background: transparent !important;
    padding: 0 !important;
    border: none !important;
    max-width: 100%;
}

.material_card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-message-bot);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    margin-top: 10px;
    backdrop-filter: blur(20px);
    transition: background 0.3s ease, border-color 0.3s ease;
    animation: cardAppear 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

[data-theme="dark"] .theme_label {
    color: #FFFFFF;
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.material_card_header {
    padding: 16px 18px;
    background: linear-gradient(135deg, rgba(0,122,255,0.12), rgba(0,122,255,0.04));
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
}

.material_title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.material_card_body {
    padding: 18px;
}

.material_price {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 18px;
    letter-spacing: -0.5px;
}

.material_info {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.info_row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 16px;
    background: rgba(127,127,127,0.06);
    border: 1px solid var(--border-light);
}

.info_row span {
    font-size: 14px;
    color: var(--text-primary);
}

.info_row strong {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 600;
    text-align: right;
}

.material_total {
    margin-top: 8px;
    padding: 16px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(0,122,255,0.14), rgba(0,122,255,0.05));
    color: var(--primary-blue);
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.4px;
}

.material_card_footer {
    padding: 16px 18px;
    border-top: 1px solid var(--border-light);
    background: rgba(127,127,127,0.04);
}

.material_call_btn {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    text-decoration: none;
    padding: 14px 18px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary-blue), var(--system-blue));
    color: white;
    font-size: 15px;
    font-weight: 600;
}

.material_call_btn:active {
    transform: scale(0.98);
}

.material_card .price-section {
    margin-bottom: 20px;
}

.material_card .price-section:last-child {
    margin-bottom: 0;
}

.material_card .price-section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.material_card .price-list {
    background: transparent;
    padding: 0;
    margin: 0;
}

.material_card .price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    gap: 12px;
    border-bottom: 0.5px solid var(--border-light);
}

.material_card .price-row:last-child {
    border-bottom: none;
}

.material_card .price-name {
    text-align: left;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.material_card .price-value {
    text-align: right;
    font-weight: 600;
    color: var(--system-blue);
    white-space: nowrap;
    font-size: 14px;
    background: rgba(0, 136, 204, 0.1);
    padding: 4px 12px;
    border-radius: 18px;
}

.material_card .separator-line {
    margin: 12px 0;
    border: none;
    height: 1px;
    background: var(--border-light);
}

.material_card .example-query {
    background: var(--bg-input);
    padding: 8px 12px;
    border-radius: 14px;
    font-size: 13px;
    color: var(--primary-blue);
    margin: 8px 0;
}

.material_card .delivery-cost {
    display: inline-block;
    background: rgba(0, 136, 204, 0.1);
    padding: 4px 12px;
    border-radius: 18px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary-blue);
}

[data-theme="dark"] .material_card {
    background: #232326;
}

[data-theme="dark"] .info_row {
    background: rgba(255,255,255,0.04);
}

[data-theme="dark"] .material_total {
    background: linear-gradient(135deg, rgba(10,132,255,0.18), rgba(10,132,255,0.08));
}

[data-theme="dark"] .material_card .price-value {
    background: rgba(0, 136, 204, 0.2);
    color: #0A84FF;
}

[data-theme="dark"] .material_card .price-row {
    border-bottom-color: var(--border-medium);
}

[data-theme="dark"] .material_card .example-query {
    background: var(--bg-input);
}

[data-theme="dark"] .material_card .price-section-title {
    border-bottom-color: var(--border-medium);
}

.discount-card {
    cursor: pointer;
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(52, 199, 89, 0.16), rgba(0, 122, 255, 0.12));
    border: 1px solid rgba(52, 199, 89, 0.22);
    color: #1E9E52;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.4;
    box-shadow: 0 6px 18px rgba(52, 199, 89, 0.12), inset 0 1px 0 rgba(255,255,255,0.35);
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    outline: none;
}

.discount-card::before {
    content: '🎁';
    width: 34px;
    height: 34px;
    min-width: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(255,255,255,0.55);
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.discount-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 90px;
    height: 90px;
    background: radial-gradient(circle, rgba(255,255,255,0.28) 0%, transparent 70%);
    pointer-events: none;
}

[data-theme="dark"] .discount-card {
    background: linear-gradient(135deg, rgba(48, 209, 88, 0.18), rgba(10, 132, 255, 0.18));
    border-color: rgba(48, 209, 88, 0.28);
    color: #5DE38C;
    box-shadow: 0 8px 24px rgba(0,0,0,0.28), inset 0 1px 0 rgba(255,255,255,0.04);
}

[data-theme="dark"] .discount-card::before {
    background: rgba(255,255,255,0.06);
}

@media (max-width: 600px) {
    .material_card {
        max-width: 100%;
        border-radius: 22px;
    }
    
    .material_card_header {
        padding: 14px 16px;
    }
    
    .material_title {
        font-size: 16px;
    }
    
    .material_card_body {
        padding: 16px;
    }
    
    .material_price {
        font-size: 24px;
        margin-bottom: 16px;
    }
    
    .info_row {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 12px;
    }
    
    .info_row strong {
        text-align: left;
        font-size: 15px;
    }
    
    .material_total {
        font-size: 20px;
        padding: 14px;
    }
    
    .material_card_footer {
        padding: 14px 16px;
    }
    
    .material_call_btn {
        font-size: 14px;
        padding: 13px 14px;
    }
    
    .material_card .price-section-title {
        font-size: 14px;
        margin-bottom: 10px;
    }
    
    .material_card .price-list {
        width: 100%;
    }
    
    .material_card .price-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 0;
        gap: 12px;
        flex-wrap: nowrap;
    }
    
    .material_card .price-name {
        font-size: 13px;
        flex: 1;
        white-space: normal;
        word-break: break-word;
    }
    
    .material_card .price-value {
        font-size: 12px;
        white-space: nowrap;
        padding: 3px 10px;
        flex-shrink: 0;
        color: var(--system-blue);
        background: rgba(0, 136, 204, 0.1);
        border-radius: 18px;
    }
    
    .material_card .separator-line {
        margin: 8px 0;
    }
    
    .material_card .example-query {
        font-size: 12px;
        padding: 6px 10px;
    }
    
    .material_card .delivery-cost {
        font-size: 12px;
        padding: 3px 10px;
    }
    
    .discount-card {
        margin-top: 10px;
        padding: 13px 14px;
        border-radius: 16px;
        font-size: 13px;
        gap: 9px;
    }
    
    .discount-card::before {
        width: 30px;
        height: 30px;
        min-width: 30px;
        border-radius: 10px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .material_card .price-row {
        gap: 8px;
    }
    
    .material_card .price-name {
        font-size: 12px;
    }
    
    .material_card .price-value {
        font-size: 11px;
        padding: 2px 8px;
    }
}

@media (max-width: 380px) {
    .material_card .price-row {
        flex-wrap: wrap;
        justify-content: flex-start;
    }
    
    .material_card .price-name {
        width: 100%;
        margin-bottom: 4px;
    }
    
    .material_card .price-value {
        margin-left: 0;
    }
}

.message_user .message_text {
    padding: 10px;
}

.material_card_footer .info_row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 0.5px solid var(--border-light);
}

.material_card_footer .info_row:last-child {
    border-bottom: none;
}

.material_card_footer .info_row span {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.material_card_footer .info_row strong {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
    text-align: right;
}

@media (max-width: 600px) {
    .material_card_footer .info_row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 8px 0;
    }
    
    .material_card_footer .info_row strong {
        text-align: left;
    }
    
    .message_bot .message_text,
    .message_user .message_text {
        animation: messageSlideInMobile 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1) forwards;
        opacity: 0;
        transform: translateY(12px);
    }
    
    @keyframes messageSlideInMobile {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

.suggestion_btn,
.input_area button {
    -webkit-tap-highlight-color: transparent;
    outline: none;
    -webkit-touch-callout: none;
    user-select: none;
}

.suggestion_btn:active,
.input_area button:active {
    transform: scale(0.96);
}

.page-out {
    opacity: 0;
    transform: scale(0.98) translateY(-8px);
    filter: blur(6px);
    transition: all 0.25s ease;
}

.page-in {
    animation: pageIn 0.25s ease forwards;
}

@media (max-width: 600px) {
    body {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        overflow: hidden;
    }
    
    .chat_container {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: auto;
    }
    
    .messages_area {
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: none;
    }
}

.messages_area {
    overscroll-behavior: contain;
}
.chat_container {
    overflow: hidden;
    height: var(--app-height, 100vh);
}