/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #fafafa;
    --primary-hover: #e4e4e7;
    --secondary-color: #71717a;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --background: #09090b;
    --surface: #18181b;
    --surface-hover: #27272a;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: #27272a;
    --border-color-hover: #3f3f46;
    --shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5);
    --accent-blue: #3b82f6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

#app-layout {
    display: flex;
    min-height: calc(100vh - 80px);
}

#main-content {
    flex: 1;
    padding: 2rem 1rem;
    min-height: calc(100vh - 80px);
    width: 100%;
}

/* Screen Management */
.screen {
    display: block;
}

.screen.hidden {
    display: none;
}

/* Common Buttons */
.btn,
.btn-primary,
.btn-secondary {
    padding: 0.625rem 1rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--background);
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:disabled {
    background-color: var(--border-color-hover);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.5;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

/* Common Form Styles */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    background-color: var(--background);
    color: var(--text-primary);
    transition: all 0.15s ease-in-out;
}

.form-group input:hover {
    border-color: var(--border-color-hover);
}

.form-group input:focus {
    outline: none;
    border-color: var(--text-muted);
    background-color: var(--background);
}

/* Error Messages */
.error-message {
    padding: 0.75rem;
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 0.375rem;
    color: #fca5a5;
    font-size: 0.875rem;
}

/* Info Cards */
.info-card {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.info-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    word-break: break-all;
}

/* Page Header */
.page-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn-back {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 0.5rem 0;
    font-size: 0.875rem;
    cursor: pointer;
    transition: color 0.15s ease-in-out;
    align-self: flex-start;
}

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

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    #app-layout {
        flex-direction: column;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}