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

html, body {
    height: 100%;
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow: hidden; /* prevent page scroll, chat scrolls internally */
}

:root {
    /* real viewport height set by JS */
    --app-height: 100%;
    /* consistent horizontal padding for all sections */
    --side-pad: 24px;
}

body {
    background-color: #0B0F12;
    color: #F3F4F6;
}

body.light-theme {
    background-color: #F0F2F5;
    color: #1A1A2E;
}

/* ─── Main Wrapper ─── */
.container-fluid.h-100 {
    height: 100vh;                 /* fallback */
    height: calc(var(--app-height) * 1);
    padding: 12px;                 /* space around the chat card */
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-wrapper {
    width: 100%;
    max-width: 1000px;
    height: 100%;                 /* fill the container */
    max-height: 850px;            /* optional, but not hard limit */
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.card {
    height: 100%;
    border-radius: 24px !important;
    background-color: #151B20 !important;
    border: 1px solid rgba(255, 255, 255, 0.04) !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55) !important;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body.light-theme .card {
    background-color: #FFFFFF !important;
    border-color: rgba(0, 0, 0, 0.06) !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08) !important;
}

/* ----- Header ----- */
.msg_head {
    background: rgba(21, 27, 32, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding: 16px var(--side-pad);
    flex-shrink: 0;
    backdrop-filter: blur(10px);
    transition: background 0.3s ease, border-color 0.3s ease;
}
body.light-theme .msg_head {
    background: #FFFFFF;
    border-bottom-color: rgba(0, 0, 0, 0.06);
}

.img_cont {
    position: relative;
    height: 50px;
    width: 50px;
}
.user_img {
    height: 50px;
    width: 50px;
    border: 2px solid #EC7D23;
    object-fit: cover;
    background: #1e2a32;
    padding: 2px;
    transition: border-color 0.3s ease;
}
.online_icon {
    position: absolute;
    height: 12px;
    width: 12px;
    background-color: #22C55E;
    border-radius: 50%;
    bottom: 0;
    right: 0;
    border: 2px solid #151B20;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.3);
}
body.light-theme .online_icon {
    border-color: #FFFFFF;
}
.user_info {
    margin-left: 15px;
    min-width: 0;
}
.user_info span {
    font-size: 20px;
    font-weight: 600;
    color: #F3F4F6;
    letter-spacing: -0.3px;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.user_info p {
    font-size: 12px;
    color: #94A3B8;
    margin-bottom: 0;
    font-weight: 400;
    letter-spacing: 0.2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
body.light-theme .user_info span {
    color: #1A1A2E;
}
body.light-theme .user_info p {
    color: #6B7280;
}

.header-row {
    flex-wrap: wrap;
    row-gap: 6px;
}
.header-identity {
    min-width: 0;
    flex-shrink: 1;
}
.img_cont {
    flex-shrink: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.theme-toggle-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #94A3B8;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}
.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.10);
    color: #F3F4F6;
    transform: scale(1.05);
}
body.light-theme .theme-toggle-btn {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
    color: #6B7280;
}
body.light-theme .theme-toggle-btn:hover {
    background: rgba(0, 0, 0, 0.08);
}

.history-indicator {
    font-size: 0.7rem;
    color: #4a5a6a;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 400;
    letter-spacing: 0.2px;
}
.history-indicator i {
    font-size: 0.7rem;
}
body.light-theme .history-indicator {
    color: #8B9BB0;
}

.clear-chat-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #94A3B8;
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 0.78rem;
    transition: all 0.2s ease;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    letter-spacing: 0.2px;
}
.clear-chat-btn:hover {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.3);
    color: #F87171;
    transform: scale(1.02);
}
.clear-chat-btn i {
    font-size: 0.7rem;
}
body.light-theme .clear-chat-btn {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
    color: #6B7280;
}
body.light-theme .clear-chat-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.2);
    color: #EF4444;
}

/* ----- Message Body ----- */
.msg_card_body {
    overflow-y: auto;
    background: rgba(11, 15, 18, 0.95);
    padding: 20px var(--side-pad) 12px;
    flex: 1 1 auto;
    min-height: 0;           /* crucial: allows shrinking */
    scroll-behavior: smooth;
    backdrop-filter: blur(5px);
}
body.light-theme .msg_card_body {
    background: #F8FAFC;
}
.msg_card_body::-webkit-scrollbar {
    width: 5px;
}
.msg_card_body::-webkit-scrollbar-track {
    background: #0B0F12;
}
.msg_card_body::-webkit-scrollbar-thumb {
    background: #EC7D23;
    border-radius: 12px;
}
body.light-theme .msg_card_body::-webkit-scrollbar-track {
    background: #F0F2F5;
}

/* ----- Messages - Differentiated ----- */
.message-row {
    animation: slideIn 0.3s ease forwards;
    opacity: 0;
    transform: translateY(10px);
}
@keyframes slideIn {
    to { opacity: 1; transform: translateY(0); }
}

.user-message .msg_cotainer_send {
    background: rgba(236, 125, 35, 0.12);
    border: 1px solid rgba(236, 125, 35, 0.2);
    border-radius: 18px;
    border-top-right-radius: 4px;
    padding: 14px 18px;
    color: #F3F4F6;
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 85%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    position: relative;
    transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.bot-message .msg_cotainer {
    background: #1e2a32;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 18px;
    border-top-left-radius: 4px;
    padding: 14px 18px;
    color: #F3F4F6;
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 85%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    position: relative;
    transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

body.light-theme .user-message .msg_cotainer_send {
    background: rgba(236, 125, 35, 0.08);
    border-color: rgba(236, 125, 35, 0.2);
    color: #1A1A2E;
}
body.light-theme .bot-message .msg_cotainer {
    background: #FFFFFF;
    border-color: rgba(0, 0, 0, 0.06);
    color: #1A1A2E;
}

.msg_time {
    display: block;
    font-size: 0.65rem;
    color: #4a5a6a;
    margin-top: 6px;
    letter-spacing: 0.2px;
}
.msg_time_send {
    display: block;
    font-size: 0.65rem;
    color: #6b8faf;
    margin-top: 6px;
    text-align: right;
    letter-spacing: 0.2px;
}
body.light-theme .msg_time_send {
    color: #a0b8d0;
}

.user-avatar-circle,
.bot-avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.user-avatar-circle {
    background: #EC7D23;
    color: #FFFFFF;
    border: 2px solid #EC7D23;
    box-shadow: 0 2px 8px rgba(236, 125, 35, 0.3);
}

.bot-avatar-circle {
    background: #1e2a32;
    color: #EC7D23;
    border: 2px solid rgba(236, 125, 35, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

body.light-theme .bot-avatar-circle {
    background: #E8EEF4;
    border-color: #EC7D23;
}

.img_cont_msg {
    flex-shrink: 0;
}

/* ----- Welcome / Empty State ----- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 250px;        /* reduced from 350px */
    text-align: center;
    padding: 20px 10px;
}
.welcome-content {
    max-width: 600px;
    width: 100%;
}
.welcome-icon {
    width: 70px;
    height: 70px;
    background: rgba(236, 125, 35, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    border: 1px solid rgba(236, 125, 35, 0.15);
}
.welcome-icon i {
    font-size: 2rem;
    color: #EC7D23;
}
.empty-state h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #F3F4F6;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.empty-state h2 span {
    color: #EC7D23;
}
body.light-theme .empty-state h2 {
    color: #1A1A2E;
}
.welcome-divider {
    width: 60px;
    height: 2px;
    background: rgba(236, 125, 35, 0.25);
    margin: 0 auto 16px;
    border-radius: 2px;
}
.welcome-description {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #94A3B8;
    margin-bottom: 20px;
}
.welcome-description strong {
    color: #E2E8F0;
    font-weight: 600;
}
body.light-theme .welcome-description {
    color: #4B5563;
}
body.light-theme .welcome-description strong {
    color: #1A1A2E;
}
.welcome-cta {
    font-size: 0.9rem;
    color: #EC7D23;
    font-weight: 500;
    letter-spacing: 0.3px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.welcome-cta i {
    font-size: 0.8rem;
}
body.light-theme .welcome-divider {
    background: rgba(0, 0, 0, 0.08);
}

/* ----- Suggestions ----- */
.suggestions-wrapper {
    padding: 10px var(--side-pad) 8px;
    background: rgba(11, 15, 18, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex-shrink: 0;
    justify-content: center;
    backdrop-filter: blur(5px);
}
body.light-theme .suggestions-wrapper {
    background: #F8FAFC;
    border-top-color: rgba(0, 0, 0, 0.04);
}
.suggestion-chip {
    background: #151B20;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 40px;
    padding: 6px 18px;
    font-size: 0.78rem;
    font-weight: 500;
    color: #D1D9E6;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.2px;
    white-space: nowrap;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}
.suggestion-chip:hover {
    background: rgba(236, 125, 35, 0.1);
    border-color: #EC7D23;
    color: #F3F4F6;
    transform: scale(1.03);
}
body.light-theme .suggestion-chip {
    background: #FFFFFF;
    border-color: rgba(0, 0, 0, 0.08);
    color: #4B5563;
}
body.light-theme .suggestion-chip:hover {
    background: rgba(236, 125, 35, 0.06);
    border-color: #EC7D23;
    color: #1A1A2E;
}

/* ----- Typing Indicator ----- */
.typing-indicator {
    padding: 10px 14px;
    color: #94A3B8;
    font-size: 0.85rem;
    font-weight: 400;
    align-items: center;
}
body.light-theme .typing-indicator {
    color: #6B7280;
}
.typing-text {
    margin-right: 6px;
}
.typing-indicator .dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    background: #EC7D23;
    border-radius: 50%;
    margin: 0 3px;
    animation: pulse 1.2s infinite ease-in-out;
    opacity: 0.5;
}
.typing-indicator .dot:nth-child(2) { animation-delay: 0.2s; opacity: 0.6; }
.typing-indicator .dot:nth-child(3) { animation-delay: 0.4s; opacity: 0.8; }
@keyframes pulse {
    0%, 60%, 100% { transform: scale(0.6); opacity: 0.4; }
    30% { transform: scale(1.2); opacity: 1; }
}

/* ----- Input Footer ----- */
.card-footer {
    background: rgba(21, 27, 32, 0.95) !important;
    border-top: 1px solid rgba(255, 255, 255, 0.04) !important;
    padding: 12px var(--side-pad);
    flex-shrink: 0;
    backdrop-filter: blur(10px);
}
body.light-theme .card-footer {
    background: #FFFFFF !important;
    border-top-color: rgba(0, 0, 0, 0.06) !important;
}

.type_msg {
    background: #0B0F12 !important;
    border: 1px solid rgba(255, 255, 255, 0.06) !important;
    color: #F3F4F6 !important;
    height: 50px !important;
    border-radius: 999px 0 0 999px !important;
    padding-left: 20px !important;
    font-size: 0.95rem;
    transition: border 0.2s, background 0.3s ease;
}
.type_msg:focus {
    box-shadow: none !important;
    border-color: #EC7D23 !important;
    background: #0B0F12 !important;
}
.type_msg::placeholder {
    color: #4a5a6a;
    font-weight: 400;
}
body.light-theme .type_msg {
    background: #F0F2F5 !important;
    border-color: rgba(0, 0, 0, 0.08) !important;
    color: #1A1A2E !important;
}
body.light-theme .type_msg:focus {
    border-color: #EC7D23 !important;
    background: #F0F2F5 !important;
}
body.light-theme .type_msg::placeholder {
    color: #9CA3AF;
}

.send_btn {
    border-radius: 0 999px 999px 0 !important;
    background: #EC7D23 !important;
    border: none !important;
    color: #F3F4F6 !important;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
    padding: 0 20px;
}
.send_btn:hover {
    background: #D16B1A !important;
    transform: scale(1.02);
}
.send_btn i {
    font-size: 1.1rem;
}
body.light-theme .send_btn {
    background: #EC7D23 !important;
    color: #FFFFFF !important;
}
body.light-theme .send_btn:hover {
    background: #D16B1A !important;
}

/* ----- Markdown Styling (within assistant messages) ----- */
.msg_cotainer h1, .msg_cotainer h2, .msg_cotainer h3,
.msg_cotainer h4, .msg_cotainer h5, .msg_cotainer h6 {
    font-weight: 600;
    margin: 0.5rem 0 0.2rem;
    color: #F3F4F6;
}
.msg_cotainer h2 {
    font-size: 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-bottom: 4px;
}
.msg_cotainer ul, .msg_cotainer ol {
    padding-left: 1.2rem;
    margin: 0.3rem 0;
}
.msg_cotainer li {
    margin-bottom: 2px;
}
.msg_cotainer p {
    margin: 0.3rem 0;
}
.msg_cotainer strong {
    color: #F3F4F6;
}
.msg_cotainer code {
    background: #0B0F12;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
    color: #94A3B8;
}
.msg_cotainer a {
    color: #EC7D23;
    text-decoration: none;
}
.msg_cotainer a:hover {
    text-decoration: underline;
}
body.light-theme .msg_cotainer h1,
body.light-theme .msg_cotainer h2,
body.light-theme .msg_cotainer h3,
body.light-theme .msg_cotainer h4,
body.light-theme .msg_cotainer h5,
body.light-theme .msg_cotainer h6 {
    color: #1A1A2E;
}
body.light-theme .msg_cotainer h2 {
    border-bottom-color: rgba(0, 0, 0, 0.08);
}
body.light-theme .msg_cotainer strong {
    color: #1A1A2E;
}
body.light-theme .msg_cotainer code {
    background: #F0F2F5;
    color: #4B5563;
}

/* ----- Confirmation Modal ----- */
.confirm-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}
.confirm-modal.active {
    display: flex;
}
.confirm-modal-content {
    background: #151B20;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 20px;
    padding: 32px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
    animation: modalPop 0.25s ease;
}
@keyframes modalPop {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}
body.light-theme .confirm-modal-content {
    background: #FFFFFF;
    border-color: rgba(0, 0, 0, 0.06);
}
.confirm-modal-content h4 {
    color: #F3F4F6;
    margin-bottom: 8px;
}
body.light-theme .confirm-modal-content h4 {
    color: #1A1A2E;
}
.confirm-modal-content p {
    color: #94A3B8;
    font-size: 0.95rem;
    margin-bottom: 20px;
}
body.light-theme .confirm-modal-content p {
    color: #6B7280;
}
.confirm-modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.confirm-modal-actions button {
    padding: 8px 24px;
    border-radius: 40px;
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn-cancel {
    background: rgba(255, 255, 255, 0.05);
    color: #94A3B8;
    border: 1px solid rgba(255, 255, 255, 0.06);
}
.btn-cancel:hover {
    background: rgba(255, 255, 255, 0.08);
}
.btn-confirm {
    background: #EF4444;
    color: white;
}
.btn-confirm:hover {
    background: #DC2626;
    transform: scale(1.02);
}
body.light-theme .btn-cancel {
    background: rgba(0, 0, 0, 0.04);
    color: #6B7280;
    border-color: rgba(0, 0, 0, 0.08);
}
body.light-theme .btn-cancel:hover {
    background: rgba(0, 0, 0, 0.08);
}

/* ----- Responsive Refinements ----- */

/* Tablets & small laptops */
@media (max-width: 768px) {
    :root {
        --side-pad: 16px;
    }
    .container-fluid.h-100 {
        padding: 8px;
    }
    .user-message .msg_cotainer_send,
    .bot-message .msg_cotainer {
        max-width: 92%;
    }
    .suggestion-chip {
        font-size: 0.7rem;
        padding: 4px 12px;
    }
    .msg_head {
        padding-top: 12px;
        padding-bottom: 12px;
    }
    .user_info span {
        font-size: 1rem;
    }
    .user_info p {
        font-size: 10px;
    }
    .header-actions {
        gap: 8px;
    }
    .clear-chat-btn {
        padding: 4px 12px;
        font-size: 0.7rem;
    }
    .theme-toggle-btn {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    .history-indicator {
        font-size: 0.6rem;
    }
}

/* Phones */
@media (max-width: 576px) {
    :root {
        --side-pad: 14px;
    }
    .container-fluid.h-100 {
        padding: 6px;
    }
    .user-message .msg_cotainer_send,
    .bot-message .msg_cotainer {
        font-size: 0.85rem;
        padding: 10px 14px;
    }
    .suggestions-wrapper {
        padding-top: 6px;
        padding-bottom: 6px;
        gap: 6px;
    }
    .suggestion-chip {
        font-size: 0.65rem;
        padding: 4px 10px;
    }
    .card-footer {
        padding-top: 8px;
        padding-bottom: 8px;
    }
    .type_msg {
        font-size: 0.85rem;
        height: 42px !important;
        padding-left: 14px !important;
    }
    .send_btn {
        padding: 0 14px;
    }
    .send_btn i {
        font-size: 0.9rem;
    }
    .empty-state h2 {
        font-size: 1.4rem;
    }
    .welcome-description {
        font-size: 0.85rem;
    }
    .confirm-modal-content {
        padding: 24px;
    }
    .user-avatar-circle,
    .bot-avatar-circle {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }
}

/* Very narrow phones (e.g. < 400px) */
@media (max-width: 400px) {
    :root {
        --side-pad: 10px;
    }
    .msg_head {
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .user_info p {
        display: none; /* hides subtitle to save space */
    }
    .header-actions {
        gap: 4px;
    }
    .history-indicator {
        display: none;
    }
    .clear-chat-btn span {
        display: none;
    }
    .clear-chat-btn {
        padding: 6px 8px;
    }
    .suggestion-chip {
        font-size: 0.6rem;
        padding: 3px 8px;
    }
    .empty-state {
        min-height: 150px;
    }
}

/* Short viewports (e.g. landscape phones) */
@media (max-height: 650px) {
    :root {
        --side-pad: 16px;
    }
    .container-fluid.h-100 {
        padding: 6px;
    }
    .msg_card_body {
        min-height: 100px;
        padding-top: 10px;
        padding-bottom: 6px;
    }
    .suggestions-wrapper {
        padding-top: 4px;
        padding-bottom: 4px;
        gap: 4px;
    }
    .suggestion-chip {
        font-size: 0.6rem;
        padding: 3px 8px;
    }
    .card-footer {
        padding-top: 4px;
        padding-bottom: 4px;
    }
    .type_msg {
        height: 34px !important;
        font-size: 0.8rem;
        padding-left: 12px !important;
    }
    .send_btn {
        padding: 0 12px;
    }
    .msg_head {
        padding-top: 8px;
        padding-bottom: 8px;
    }
    .user_img {
        height: 32px;
        width: 32px;
    }
    .img_cont {
        height: 32px;
        width: 32px;
    }
    .user_info span {
        font-size: 0.9rem;
    }
    .user_info p {
        font-size: 9px;
    }
    .empty-state {
        min-height: 100px;
        padding: 10px;
    }
    .welcome-icon {
        width: 40px;
        height: 40px;
        margin-bottom: 8px;
    }
    .welcome-icon i {
        font-size: 1.2rem;
    }
    .empty-state h2 {
        font-size: 1rem;
    }
    .user-avatar-circle,
    .bot-avatar-circle {
        width: 24px;
        height: 24px;
        font-size: 0.6rem;
    }
}