:root {
    --bg-color: #0c0f17;
    --sidebar-bg: rgba(18, 22, 35, 0.7);
    --card-bg: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --primary-gradient: linear-gradient(135deg, #06b6d4 0%, #7c3aed 100%);
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
    --shadow-color: rgba(0, 0, 0, 0.35);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(124, 58, 237, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.15) 0%, transparent 40%);
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* ================= SIDEBAR STYLING ================= */
.sidebar {
    width: 320px;
    background-color: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    z-index: 10;
}

.sidebar-header {
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(to right, #06b6d4, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brain-icon {
    font-size: 26px;
    color: #06b6d4;
    -webkit-text-fill-color: initial;
}

.subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.lang-switch {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 4px;
    border-radius: 10px;
}

.lang-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.lang-btn.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.2);
}

.control-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: auto;
}

.btn {
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: white;
}

.btn-primary {
    background: var(--primary-gradient);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.25);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

.btn-danger {
    background: var(--danger-gradient);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.session-info {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 24px;
}

.session-info h3 {
    font-size: 13px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    margin-bottom: 8px;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item .label {
    color: var(--text-secondary);
}

.info-item .value {
    font-weight: 500;
}

.status-active {
    color: #10b981;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-active::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

.status-inactive {
    color: #ef4444;
}

.sidebar-footer .btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
    transition: all 0.2s;
}

.sidebar-footer .btn-icon:hover {
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.2);
    background-color: rgba(255,255,255,0.02);
}

/* ================= CHAT AREA STYLING ================= */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    height: 70px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    background-color: rgba(12, 15, 23, 0.4);
    backdrop-filter: blur(10px);
}

.chat-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.badge {
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: #22d3ee;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Welcome screen */
.system-welcome {
    margin: auto;
    text-align: center;
    max-width: 400px;
    color: var(--text-secondary);
}

.system-welcome i {
    font-size: 50px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #06b6d4, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.system-welcome h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 20px;
}

/* Message Bubbles */
.message {
    max-width: 75%;
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.3s ease;
}

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

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

.message-sender {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    margin-left: 12px;
}

.message.user .message-sender {
    margin-left: 0;
    margin-right: 12px;
    align-self: flex-end;
}

.message-content {
    padding: 16px 20px;
    border-radius: 18px;
    font-size: 15px;
    line-height: 1.6;
}

.message.user .message-content {
    background: var(--primary-gradient);
    color: white;
    border-bottom-right-radius: 4px;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.15);
}

.message.agent .message-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

/* Markdown styling inside Agent message */
.message-content p {
    margin-bottom: 12px;
}
.message-content p:last-child {
    margin-bottom: 0;
}
.message-content strong {
    color: #22d3ee;
}
.message.user .message-content strong {
    color: white;
}
.message-content ul, .message-content ol {
    margin-left: 20px;
    margin-bottom: 12px;
}
.message-content li {
    margin-bottom: 4px;
}

/* Table styling for Use Cases */
.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
}
.message-content th, .message-content td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}
.message-content th {
    background-color: rgba(255,255,255,0.05);
    font-weight: 600;
}

/* System messages */
.message.system {
    align-self: center;
    max-width: 100%;
}
.message.system .message-content {
    background-color: rgba(255,255,255,0.02);
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
    font-size: 13px;
    padding: 8px 16px;
    border-radius: 8px;
    text-align: center;
}

/* Chat Input Bar */
.chat-input-container {
    padding: 20px 32px 32px;
    display: flex;
    gap: 16px;
    background-color: var(--bg-color);
}

.chat-input-container textarea {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    color: var(--text-primary);
    padding: 12px 18px;
    font-size: 15px;
    resize: none;
    outline: none;
    transition: border-color 0.2s;
}

.chat-input-container textarea:focus:not(:disabled) {
    border-color: rgba(6, 182, 212, 0.5);
}

.chat-input-container textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-send {
    background: var(--primary-gradient);
    border: none;
    border-radius: 14px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.2);
}

.btn-send:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 6px 15px rgba(6, 182, 212, 0.45);
}

.btn-send:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ================= MODAL & OVERLAYS ================= */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 100;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: #121623;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 500px;
    max-width: 90%;
    overflow: hidden;
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-modal {
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

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

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    background-color: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 10px;
    color: var(--text-primary);
    outline: none;
    font-size: 14px;
}

.form-group input:focus {
    border-color: #06b6d4;
}

.help-text {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(12, 15, 23, 0.85);
    backdrop-filter: blur(10px);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.spinner-container {
    text-align: center;
    color: var(--text-primary);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(6, 182, 212, 0.1);
    border-top: 4px solid #06b6d4;
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.5; }
    100% { transform: scale(1); opacity: 1; }
}

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

@keyframes scaleUp {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}