@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap");

:root {
    --primary-color: #0d47a1;
    --primary-hover: #002e7a;
    --primary-light: #e8f0fe;
    --success-color: #059669;
    --success-light: #d1fae5;
    --warning-color: #d97706;
    --warning-light: #fef3c7;
    --danger-color: #dc2626;
    --danger-light: #fee2e2;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --chat-bg: #eef2f6;
    --chat-sent-bg: linear-gradient(135deg, #0d47a1 0%, #1976d2 100%);
    --chat-sent-text: #ffffff;
    --chat-recv-bg: #ffffff;
    --chat-recv-text: #1e293b;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
}

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

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--slate-800);
    background-color: var(--chat-bg);
}

/* App Header */
.chat-app-header {
    background: #ffffff;
    border-bottom: 1px solid var(--slate-200);
    padding: 10px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-brand-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
}

.header-icon-box {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #0d47a1 0%, #2563eb 100%);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 10px rgba(13, 71, 161, 0.25);
}

.header-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--slate-900);
    margin: 0;
    line-height: 1.2;
}

.header-subtitle {
    font-size: 12px;
    color: var(--slate-500);
    margin-top: 2px;
    font-weight: 500;
}

.btn-close-window {
    background-color: #fff;
    border: 1px solid #fca5a5;
    color: var(--danger-color);
    font-size: 13px;
    font-weight: 600;
    padding: 7px 16px;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
}

.btn-close-window:hover {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.25);
}

/* Main Layout */
.chat-main-wrapper {
    max-width: 1400px;
    margin: 16px auto;
    padding: 0 16px;
    height: calc(100vh - 90px);
    display: flex;
    flex-direction: column;
}

.chat-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--slate-200);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* Top Toolbar */
.chat-toolbar {
    background: #ffffff;
    border-bottom: 1px solid var(--slate-200);
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.tender-meta-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tender-id-pill {
    background: var(--slate-100);
    border: 1px solid var(--slate-200);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.tender-status-badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.status-approved {
    background-color: var(--success-light);
    color: var(--success-color);
    border: 1px solid #a7f3d0;
}

.status-process {
    background-color: var(--warning-light);
    color: var(--warning-color);
    border: 1px solid #fde68a;
}

.user-role-badge {
    background-color: #f1f5f9;
    color: var(--slate-600);
    border: 1px solid var(--slate-300);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
}

.tender-actions-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-action-tool {
    font-size: 13px;
    font-weight: 600;
    padding: 7px 14px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    border: 1px solid var(--slate-300);
    background: #ffffff;
    color: var(--slate-700);
    cursor: pointer;
}

.btn-action-tool:hover {
    background: var(--slate-50);
    border-color: var(--slate-400);
    color: var(--slate-900);
    box-shadow: var(--shadow-sm);
}

.btn-action-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
}

.btn-action-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(13, 71, 161, 0.25);
}

.btn-action-success {
    background: var(--success-color);
    border-color: var(--success-color);
    color: #ffffff;
}

.btn-action-success:hover {
    background: #047857;
    border-color: #047857;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
}

/* Chat Messages Viewport */
#chatContainer {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background-color: #f4f6f9;
    background-image: radial-gradient(#cbd5e1 0.75px, transparent 0.75px), radial-gradient(#cbd5e1 0.75px, #f4f6f9 0.75px);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
#chatContainer::-webkit-scrollbar {
    width: 6px;
}
#chatContainer::-webkit-scrollbar-track {
    background: transparent;
}
#chatContainer::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.5);
    border-radius: 10px;
}
#chatContainer::-webkit-scrollbar-thumb:hover {
    background: rgba(100, 116, 139, 0.8);
}

/* Date Separator */
.date-header {
    align-self: center;
    background: #ffffff;
    border: 1px solid var(--slate-200);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    color: var(--slate-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
    margin: 8px 0;
    z-index: 1;
}

/* Message Bubble */
.chat {
    max-width: 72%;
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    position: relative;
    box-shadow: var(--shadow-sm);
    animation: bubbleFadeIn 0.25s ease-out;
    display: flex;
    flex-direction: column;
    gap: 6px;
    word-break: break-word;
}

@keyframes bubbleFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.chat.sent {
    align-self: flex-end;
    background: var(--chat-sent-bg);
    color: var(--chat-sent-text);
    border-bottom-right-radius: 4px;
    box-shadow: 0 4px 14px rgba(13, 71, 161, 0.18);
}

.chat.received {
    align-self: flex-start;
    background: var(--chat-recv-bg);
    color: var(--chat-recv-text);
    border: 1px solid var(--slate-200);
    border-bottom-left-radius: 4px;
}

/* Bubble Header / Meta */
.chat-meta-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    flex-wrap: wrap;
}

.chat.sent .chat-meta-row {
    color: rgba(255, 255, 255, 0.85);
}

.chat.received .chat-meta-row {
    color: var(--slate-500);
}

.chat-sender-name {
    font-weight: 700;
    font-size: 13px;
}

.chat.sent .chat-sender-name {
    color: #ffffff;
}

.chat.received .chat-sender-name {
    color: var(--slate-900);
}

.chat-role-chip {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.chat.sent .chat-role-chip {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.chat.received .chat-role-chip {
    background: var(--slate-100);
    color: var(--slate-700);
    border: 1px solid var(--slate-200);
}

.chat-time-text {
    font-size: 11px;
    margin-left: auto;
    opacity: 0.8;
}

/* Message Text */
.chat-body-text {
    font-size: 14px;
    line-height: 1.5;
    white-space: pre-wrap;
}

/* Attachment Card */
.chat-attachment-card {
    margin-top: 6px;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: all 0.2s;
}

.chat.sent .chat-attachment-card {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.chat.sent .chat-attachment-card:hover {
    background: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

.chat.received .chat-attachment-card {
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    color: var(--slate-800);
}

.chat.received .chat-attachment-card:hover {
    background: var(--slate-100);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.attachment-icon {
    font-size: 20px;
}

.attachment-info {
    flex: 1;
    overflow: hidden;
}

.attachment-name {
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.attachment-action {
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Bottom Composer */
.chat-composer-wrap {
    background: #ffffff;
    border-top: 1px solid var(--slate-200);
    padding: 14px 20px;
}

.composer-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.composer-input-row {
    display: flex;
    align-items: flex-end;
    gap: 10px;
}

.composer-textarea-wrap {
    flex: 1;
    position: relative;
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.composer-textarea-wrap:focus-within {
    background: #ffffff;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

.composer-textarea {
    width: 100%;
    border: none;
    background: transparent;
    padding: 10px 14px;
    font-size: 14px;
    font-family: inherit;
    color: var(--slate-800);
    resize: none;
    max-height: 120px;
    outline: none;
    line-height: 1.4;
}

.btn-composer-attach {
    background: var(--slate-100);
    border: 1px solid var(--slate-200);
    color: var(--slate-600);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.btn-composer-attach:hover {
    background: var(--slate-200);
    color: var(--primary-color);
}

.btn-composer-send {
    background: var(--primary-color);
    border: 1px solid var(--primary-color);
    color: #ffffff;
    height: 44px;
    padding: 0 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.btn-composer-send:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(13, 71, 161, 0.25);
}

.file-preview-bar {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--slate-100);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--slate-700);
}

.btn-remove-file {
    background: none;
    border: none;
    color: var(--slate-400);
    cursor: pointer;
    font-size: 14px;
    padding: 0 4px;
}

.btn-remove-file:hover {
    color: var(--danger-color);
}

/* Modals & Popups */
.modal-header-custom {
    background: linear-gradient(135deg, #0d47a1 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 16px 20px;
    border-bottom: none;
}

.modal-header-custom .modal-title {
    font-size: 16px;
    font-weight: 700;
}

.modal-header-custom .btn-close {
    filter: brightness(0) invert(1);
}

.user-filter-box {
    position: relative;
    margin-bottom: 14px;
}

.user-filter-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--slate-400);
}

.user-filter-input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-md);
    font-size: 13px;
    outline: none;
}

.user-filter-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

.user-checklist-scroll {
    max-height: 280px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-checklist-item {
    display: flex;
    align-items: center;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--slate-200);
    background: var(--slate-50);
    cursor: pointer;
    transition: all 0.15s;
}

.user-checklist-item:hover {
    background: #ffffff;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.user-avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 12px;
    margin-right: 10px;
    flex-shrink: 0;
}

/* Empty State */
.chat-empty-state {
    margin: auto;
    text-align: center;
    color: var(--slate-400);
    padding: 40px 20px;
}

.chat-empty-icon {
    font-size: 48px;
    color: var(--slate-300);
    margin-bottom: 12px;
}