:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #475569;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Views */
.view {
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Login View */
.login-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 2rem;
    padding-top: 15vh;
    text-align: center;
}

.login-container h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--surface);
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.error-message {
    color: var(--error-color);
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: rgba(239, 68, 68, 0.1);
    border-radius: 0.5rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background-color: var(--surface-light);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.nav-btn:hover {
    background-color: var(--surface-light);
    color: var(--text-primary);
}

.nav-btn.active {
    background-color: var(--primary-color);
    color: white;
}

.nav-btn.logout {
    color: var(--error-color);
}

/* Tab Content */
.tab-content {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

/* Voice Tab */
.voice-container {
    text-align: center;
}

.voice-status {
    padding: 3rem;
    margin-bottom: 2rem;
    border-radius: 1rem;
    background-color: var(--surface);
}

.status-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.voice-status.idle .status-icon {
    background-color: var(--surface-light);
    box-shadow: 0 0 0 0 rgba(100, 116, 139, 0.4);
}

.voice-status.listening .status-icon {
    background-color: var(--primary-color);
    animation: pulse 1.5s infinite;
}

.voice-status.processing .status-icon {
    background-color: var(--warning-color);
    animation: spin 1s linear infinite;
}

.voice-status.speaking .status-icon {
    background-color: var(--success-color);
    animation: pulse 0.5s infinite;
}

.voice-status.error .status-icon {
    background-color: var(--error-color);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.5); }
    70% { box-shadow: 0 0 0 20px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

.response-container {
    padding: 1.5rem;
    margin-bottom: 2rem;
    background-color: var(--surface);
    border-radius: 0.5rem;
    text-align: left;
}

.response-container p {
    line-height: 1.6;
}

.voice-controls {
    margin-bottom: 3rem;
}

/* Text Test */
.text-test {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.text-test h3 {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: normal;
}

.text-input-group {
    display: flex;
    gap: 0.5rem;
}

.text-input-group input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--surface);
    color: var(--text-primary);
    font-size: 1rem;
}

/* Items Tab */
.items-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.items-header input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--surface);
    color: var(--text-primary);
}

.items-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.item-card {
    padding: 1rem;
    background-color: var(--surface);
    border-radius: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.item-info h3 {
    margin-bottom: 0.25rem;
}

.item-info .location {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.item-info .description {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.item-info .category {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.25rem 0.5rem;
    background-color: var(--surface-light);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    color: var(--primary-color);
}

.item-actions {
    display: flex;
    gap: 0.5rem;
}

.item-actions button {
    padding: 0.5rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 0.25rem;
}

.item-actions button:hover {
    background-color: var(--surface-light);
    color: var(--text-primary);
}

.item-actions button.delete:hover {
    color: var(--error-color);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-content {
    background-color: var(--surface);
    padding: 2rem;
    border-radius: 0.5rem;
    width: 90%;
    max-width: 500px;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

/* Settings Tab */
.settings-container h2 {
    margin-bottom: 1.5rem;
}

.setting-group {
    background-color: var(--surface);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.setting-group h3 {
    margin-bottom: 0.5rem;
}

.setting-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.setting-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: var(--background);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.875rem;
    resize: vertical;
}

.setting-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 200;
}

.toast {
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    margin-top: 0.5rem;
    animation: slideIn 0.3s ease;
    max-width: 300px;
}

.toast.success {
    background-color: var(--success-color);
    color: white;
}

.toast.error {
    background-color: var(--error-color);
    color: white;
}

.toast.info {
    background-color: var(--primary-color);
    color: white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        gap: 1rem;
    }

    nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .tab-content {
        padding: 1rem;
    }

    .items-header {
        flex-direction: column;
    }

    .text-input-group {
        flex-direction: column;
    }
}