/* ============================================
   CHATBOT TTHC - XÃ PHÙ MỸ BẮC
   Color Palette:
     --navy:       #1B2A4A
     --navy-dark:  #0F1B33
     --burgundy:   #8B1A2B
     --burgundy-l: #A62639
     --bg:         #F4F5F7
     --card-bg:    #FFFFFF
     --text:       #2C3E50
     --text-light: #6B7B8D
   ============================================ */

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

:root {
    --navy: #1B2A4A;
    --navy-dark: #0F1B33;
    --navy-light: #2C3F65;
    --burgundy: #8B1A2B;
    --burgundy-light: #A62639;
    --burgundy-glow: rgba(166, 38, 57, 0.15);
    --gold: #D4A843;
    --gold-light: #F0D68A;
    --bg: #F4F5F7;
    --bg-chat: #ECEEF2;
    --card-bg: #FFFFFF;
    --card-border: #E2E5EB;
    --text: #2C3E50;
    --text-light: #6B7B8D;
    --text-muted: #94A3B5;
    --success: #27AE60;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-card: 0 2px 8px rgba(27, 42, 74, 0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html,
body {
    height: 100%;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;

/* ========== CHATBOT CONTAINER ========== */
.chatbot-container {
    width: 100%;
    max-width: 820px;
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

/* ========== HEADER ========== */
.chat-header {
    background: linear-gradient(135deg, #0d1245 0%, #1a237e 50%, #0d1245 100%);
    color: #fff;
    padding: 22px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(212, 168, 67, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.chat-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--burgundy), var(--gold), var(--burgundy));
}


.header-text {
    flex: 1;
}

.header-text h1 {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1.35;
    text-transform: uppercase;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.header-subtitle {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--gold);
    letter-spacing: 1.5px;
    margin-top: 4px;
    text-transform: uppercase;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    flex-shrink: 0;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s ease-in-out infinite;
}

.status-text {
    font-weight: 500;
}

/* ========== CHAT BODY ========== */
.chat-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    background: var(--bg-chat);
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
    scroll-behavior: smooth;
}

/* Scrollbar styling */
.chat-body::-webkit-scrollbar {
    width: 6px;
}

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

.chat-body::-webkit-scrollbar-thumb {
    background: rgba(27, 42, 74, 0.15);
    border-radius: 3px;
}

.chat-body::-webkit-scrollbar-thumb:hover {
    background: rgba(27, 42, 74, 0.3);
}

/* ========== MESSAGE BUBBLES ========== */
.message {
    display: flex;
    gap: 10px;
    animation: fadeInUp 0.35s ease-out;
}

.message.bot {
    align-self: flex-start;
    max-width: 92%;
}

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
    max-width: 80%;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.8rem;
    font-weight: 700;
}

.message.bot .message-avatar {
    background: linear-gradient(135deg, var(--navy), var(--navy-light));
    color: var(--gold);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--burgundy), var(--burgundy-light));
    color: #fff;
}

.message-content {
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    line-height: 1.6;
    position: relative;
}

.message.bot .message-content {
    background: var(--card-bg);
    color: var(--text);
    border-bottom-left-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--navy), var(--navy-light));
    color: #fff;
    border-bottom-right-radius: 4px;
}

/* ========== RESULT CARDS ========== */
.results-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
    animation: fadeInUp 0.35s ease-out;
}

.results-summary {
    font-size: 0.85rem;
    color: var(--text-light);
    padding: 0 4px;
    font-weight: 500;
}

.results-summary strong {
    color: var(--burgundy);
}

.result-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 16px 18px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.result-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--navy), var(--burgundy));
    border-radius: 4px 0 0 4px;
    opacity: 0;
    transition: var(--transition);
}

.result-card:hover {
    border-color: var(--navy);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.result-card:hover::before {
    opacity: 1;
}

.card-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--navy);
    line-height: 1.5;
    margin-bottom: 12px;
    padding-right: 8px;
}

.card-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.card-detail {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.82rem;
    line-height: 1.5;
}

.card-detail .label {
    font-weight: 600;
    color: var(--text-light);
    white-space: nowrap;
    min-width: 80px;
    flex-shrink: 0;
}

.card-detail .value {
    color: var(--text);
}

.card-detail .value.ma-thu-tuc {
    font-family: 'Courier New', monospace;
    background: rgba(27, 42, 74, 0.06);
    padding: 1px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--navy);
}

.card-actions {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: flex-end;
}

.btn-detail {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: linear-gradient(135deg, var(--burgundy), var(--burgundy-light));
    color: #fff;
    text-decoration: none;
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    letter-spacing: 0.3px;
}

.btn-detail:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--burgundy-glow);
    filter: brightness(1.1);
}

.btn-detail svg {
    width: 14px;
    height: 14px;
}

/* ========== NOT FOUND MESSAGE ========== */
.not-found {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    text-align: center;
    margin-top: 8px;
    box-shadow: var(--shadow-card);
}

.not-found-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    color: var(--text-muted);
}

.not-found p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.6;
}

.not-found strong {
    color: var(--burgundy);
}

/* ========== TYPING INDICATOR ========== */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-indicator span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: typing 1.2s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.15s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.3s;
}

/* ========== INPUT AREA ========== */
.chat-input-area {
    padding: 16px 20px 12px;
    background: var(--card-bg);
    border-top: 1px solid var(--card-border);
    position: sticky;
    bottom: 0;
    z-index: 100;
}

.input-wrapper {
    display: flex;
    gap: 10px;
    align-items: center;
    background: var(--bg);
    border: 2px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 4px 4px 4px 16px;
    transition: var(--transition);
}

.input-wrapper:focus-within {
    border-color: var(--navy);
    box-shadow: 0 0 0 3px rgba(27, 42, 74, 0.08);
}

.chat-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text);
    padding: 10px 0;
}

.chat-input::placeholder {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    border: none;
    background: linear-gradient(135deg, var(--navy), var(--navy-light));
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.send-btn:hover {
    background: linear-gradient(135deg, var(--navy-light), var(--navy));
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(27, 42, 74, 0.25);
}

.send-btn:active {
    transform: scale(0.95);
}

.send-btn svg {
    width: 20px;
    height: 20px;
}

.input-hint {
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 0.2px;
}

.text-red {
    color: var(--burgundy) !important;
    font-weight: 600;
    margin-top: 6px;
    font-size: 0.75rem;
}

/* ========== FOOTER ========== */
.chat-footer {
    width: 100%;
    background: transparent;
    color: var(--text-muted);
    text-align: center;
    padding: 16px 20px 20px;
}

.footer-content {
    max-width: 820px;
    margin: 0 auto;
}

.footer-dev {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 4px;
    letter-spacing: 0.2px;
}

.footer-contact {
    font-size: 0.7rem;
    line-height: 1.5;
    margin-bottom: 4px;
    color: var(--text-muted);
}

.footer-contact strong {
    color: var(--text-light);
}

.footer-address {
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    color: var(--text-muted);
}

.footer-icon {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

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

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

@keyframes typing {

    0%,
    60%,
    100% {
        transform: translateY(0);
        opacity: 0.4;
    }

    30% {
        transform: translateY(-6px);
        opacity: 1;
    }
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .chatbot-container {
        max-width: 100%;
        border-radius: 0;
    }

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

    .header-text h1 {
        font-size: 0.85rem;
    }

    .header-subtitle {
        font-size: 0.72rem;
    }


    .chat-body {
        padding: 16px 14px;
        min-height: 360px;
        max-height: calc(100vh - 300px);
    }

    .message.bot {
        max-width: 96%;
    }

    .message.user {
        max-width: 88%;
    }

    .card-detail {
        flex-direction: column;
        gap: 2px;
    }

    .card-detail .label {
        min-width: unset;
    }
}

@media (max-width: 480px) {
    .header-status {
        display: none;
    }

    .header-text h1 {
        font-size: 0.78rem;
    }
}

/* ========== FULLSCREEN MODAL ========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(13, 18, 69, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    animation: modalFadeIn 0.3s ease-out;
}

.modal-overlay.closing {
    animation: modalFadeOut 0.25s ease-in forwards;
}

.modal-header {
    background: linear-gradient(135deg, #0d1245 0%, #1a237e 100%);
    color: #fff;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.modal-title {
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    margin-right: 16px;
}

.modal-iframe-wrapper {
    flex: 1;
    background: #fff;
    position: relative;
    overflow: hidden;
}

.modal-iframe-wrapper iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.modal-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #fff;
    gap: 12px;
    z-index: 1;
    transition: opacity 0.3s ease;
}

.modal-loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--card-border);
    border-top-color: var(--navy);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.modal-loading-text {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.modal-footer {
    background: var(--bg);
    border-top: 1px solid var(--card-border);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.modal-close-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 32px;
    background: linear-gradient(135deg, var(--burgundy), var(--burgundy-light));
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.3px;
}

.modal-close-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--burgundy-glow);
}

.modal-close-btn:active {
    transform: scale(0.97);
}

.modal-close-btn svg {
    width: 16px;
    height: 16px;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes modalFadeOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

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