/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;

    /* Background */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;

    /* Glass effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    background-image:
        radial-gradient(at 0% 0%, rgba(102, 126, 234, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(118, 75, 162, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Glass Card Effect ===== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
}

/* ===== Layout ===== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
}

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

.app-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Connection Status ===== */
.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--warning-color);
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.connection-status.connected .status-dot {
    background: var(--success-color);
    animation: none;
}

.connection-status.error .status-dot {
    background: var(--error-color);
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-lg);
}

/* ===== Agent Panel ===== */
.agent-panel {
    padding: var(--spacing-md);
    height: fit-content;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.agent-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.agent-card {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.agent-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.agent-card.active {
    background: var(--primary-gradient);
    border-color: transparent;
}

.agent-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.agent-avatar-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.agent-card-title {
    font-weight: 600;
    font-size: 1rem;
}

.agent-card-role {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.agent-card-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.agent-action-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

.agent-action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.agent-action-btn.delete:hover {
    background: var(--error-color);
    border-color: var(--error-color);
    color: var(--text-primary);
}

/* ===== Conversation Container ===== */
.conversation-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== Visualizer ===== */
.visualizer-container {
    position: relative;
    height: 280px;
    padding: var(--spacing-lg);
    overflow: hidden;
}

#visualizer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.6;
}

.visualizer-overlay {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.agent-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 0 40px rgba(102, 126, 234, 0.5);
    transition: all var(--transition-base);
}

.agent-avatar.speaking {
    animation: avatarPulse 1.5s ease-in-out infinite;
}

@keyframes avatarPulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 40px rgba(102, 126, 234, 0.5);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 0 60px rgba(102, 126, 234, 0.8);
    }
}

.agent-status {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ===== Conversation History ===== */
.conversation-history {
    flex: 1;
    min-height: 400px;
    max-height: 500px;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.welcome-message {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.welcome-message h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.welcome-message p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.message {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    animation: messageSlide 0.3s ease-out;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--secondary-gradient);
}

.message-content {
    max-width: 70%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

.message.user .message-content {
    background: var(--primary-gradient);
}

.message-text {
    margin: 0;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* ===== Input Controls ===== */
.input-controls {
    padding: var(--spacing-md);
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.text-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-base);
}

.text-input:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

.text-input::placeholder {
    color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-primary);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
}

.voice-controls {
    position: relative;
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-voice {
    flex: 1;
    min-width: 150px;
    padding: var(--spacing-md);
    background: var(--primary-gradient);
    color: var(--text-primary);
    font-size: 1.125rem;
}

.btn-voice:hover {
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.btn-voice.active {
    background: var(--secondary-gradient);
    animation: voicePulse 1.5s ease-in-out infinite;
}

.btn-finish {
    flex: 0 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: var(--text-primary);
    font-size: 1rem;
}

.btn-finish:hover {
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

.btn-finish:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

@keyframes voicePulse {

    0%,
    100% {
        box-shadow: 0 8px 24px rgba(245, 87, 108, 0.4);
    }

    50% {
        box-shadow: 0 8px 32px rgba(245, 87, 108, 0.6);
    }
}

.recording-indicator {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--secondary-gradient);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-sm);
}

.recording-indicator.active {
    display: flex;
}

.pulse {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-primary);
    animation: pulse 1.5s ease-in-out infinite;
}

.recording-text {
    font-weight: 600;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-content {
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlide 0.3s ease-out;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

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

.modal-header h2 {
    font-size: 1.5rem;
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

textarea.form-input {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

/* ===== Knowledge Upload Section ===== */
.knowledge-section {
    margin-top: var(--spacing-sm);
}

.knowledge-dropzone {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: rgba(255, 255, 255, 0.02);
}

.knowledge-dropzone:hover,
.knowledge-dropzone.drag-over {
    border-color: rgba(102, 126, 234, 0.5);
    background: rgba(102, 126, 234, 0.1);
}

.knowledge-dropzone.drag-over {
    transform: scale(1.02);
}

.knowledge-dropzone .upload-icon {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.knowledge-dropzone p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.knowledge-dropzone .browse-link {
    color: #667eea;
    text-decoration: underline;
    cursor: pointer;
}

.knowledge-dropzone small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.knowledge-files {
    margin-top: var(--spacing-md);
    max-height: 200px;
    overflow-y: auto;
}

.knowledge-file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
    animation: messageSlide 0.3s ease-out;
}

.knowledge-file-item .file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    overflow: hidden;
}

.knowledge-file-item .file-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}

.knowledge-file-item .file-icon.pdf {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.knowledge-file-item .file-icon.docx {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.knowledge-file-item .file-icon.txt {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
}

.knowledge-file-item .file-icon.csv {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.knowledge-file-item .file-details {
    overflow: hidden;
}

.knowledge-file-item .file-name {
    font-weight: 500;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.knowledge-file-item .file-status {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.knowledge-file-item .file-status.uploading {
    color: var(--warning-color);
}

.knowledge-file-item .file-status.complete {
    color: var(--success-color);
}

.knowledge-file-item .file-status.error {
    color: var(--error-color);
}

.knowledge-file-item .delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.knowledge-file-item .delete-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

/* Upload progress bar */
.upload-progress {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: var(--spacing-xs);
    overflow: hidden;
}

.upload-progress .progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    transition: width var(--transition-base);
    border-radius: 2px;
}

.knowledge-empty-state {
    text-align: center;
    padding: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .agent-panel {
        max-height: none;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .app-title {
        font-size: 1.25rem;
    }

    .main-content {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .visualizer-container {
        height: 200px;
    }

    .agent-avatar {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .message-content {
        max-width: 85%;
    }
}