/* Worm Gear Calculator - Styles */

:root {
    --color-valid: #22c55e;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    margin: 0;
    padding: 1rem;
}

#app {
    max-width: 1100px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    margin: 0 0 0.5rem;
    font-size: 2rem;
    color: var(--color-text);
}

.subtitle {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* Main layout */
main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
    }
}

/* Sections */
section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

section h2 {
    margin: 0 0 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

#inputs-section {
    grid-column: 1;
    grid-row: 1 / 3;
}

#validation-section {
    grid-column: 2;
    grid-row: 1;
}

#results-section {
    grid-column: 2;
    grid-row: 2;
}

#export-section {
    grid-column: 1 / -1;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    #inputs-section,
    #validation-section,
    #results-section {
        grid-column: 1;
        grid-row: auto;
    }
}

/* Form elements */
label {
    display: block;
    margin-bottom: 0.25rem;
    margin-top: 0.75rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--color-text);
}

label:first-of-type {
    margin-top: 0;
}

input[type="number"],
select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input[type="number"]:hover,
select:hover {
    border-color: #cbd5e1;
}

/* Hint text */
small.hint {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* Checkbox option */
.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
}

.checkbox-option input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.checkbox-option label {
    margin: 0;
    cursor: pointer;
    font-weight: 400;
    user-select: none;
}

/* Details/Summary (Options) */
details {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

summary {
    cursor: pointer;
    font-weight: 600;
    padding: 0.5rem 0;
    color: var(--color-primary);
    user-select: none;
}

summary:hover {
    color: var(--color-primary-hover);
}

#options-inputs {
    padding-top: 0.5rem;
}

/* Validation */
#validation-status {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 0.375rem;
}

.status-valid {
    color: var(--color-valid);
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.status-invalid {
    color: var(--color-error);
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.status-pending {
    color: var(--color-text-muted);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
}

.status-error {
    color: var(--color-error);
    background: #fef2f2;
    border: 1px solid #fecaca;
}

#validation-messages {
    list-style: none;
    padding: 0;
    margin: 0;
}

#validation-messages li {
    padding: 0.75rem;
    border-radius: 0.375rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    line-height: 1.5;
}

#validation-messages li:last-child {
    margin-bottom: 0;
}

.message-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.message-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

.message-info {
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* Module info */
.module-info {
    font-size: 0.875rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 0.375rem;
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
    font-weight: 500;
}

/* Results */
#results-text {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
    white-space: pre-wrap;
    margin: 0;
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    overflow-x: auto;
}

/* Buttons */
button {
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, box-shadow 0.15s;
    box-shadow: var(--shadow-sm);
}

button:hover:not(:disabled) {
    background: var(--color-bg);
    border-color: var(--color-primary);
}

button:active:not(:disabled) {
    transform: translateY(1px);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Loading screen */
#loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-content {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-content p {
    margin: 0.5rem 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
}

.loading-detail {
    font-size: 0.875rem !important;
    color: var(--color-text-muted) !important;
    font-weight: 400 !important;
}

/* Footer */
footer {
    margin-top: 2rem;
    padding-top: 1rem;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

footer a {
    color: var(--color-primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Notifications */
.notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    font-weight: 500;
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 0.3s, transform 0.3s;
    z-index: 1001;
}

.notification-show {
    opacity: 1;
    transform: translateY(0);
}

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

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

/* Input groups */
.input-group {
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-0.5rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments */
@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }

    section {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.875rem;
    }

    button {
        width: 100%;
    }

    #export-section {
        flex-direction: column;
    }

    .notification {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }
}

/* Loading overlays */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    background: white;
    padding: 2rem 3rem;
    border-radius: 12px;
    text-align: center;
    max-width: 400px;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-detail {
    font-size: 0.9em;
    color: #666;
    margin-top: 0.5rem;
}

/* Generator sections */
.generator-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.generator-section h2 {
    margin: 0 0 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.generator-section p {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

/* Console */
.console {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 0.9em;
    max-height: 300px;
    overflow-y: auto;
    line-height: 1.5;
}

.console div {
    margin-bottom: 0.25rem;
}

/* Controls grid */
.controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
}

.control-group label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-text);
}

.control-group input,
.control-group select {
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    font-size: 1rem;
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Checkbox groups */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.checkbox-group input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

.checkbox-group label {
    cursor: pointer;
    user-select: none;
}

/* Button groups */
.button-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* JSON input area */
.json-input-area textarea {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 0.9em;
    resize: vertical;
}

.json-input-area textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Validation status colors */
.status-valid {
    color: var(--color-valid);
    font-weight: 600;
}

.status-error {
    color: var(--color-error);
    font-weight: 600;
}

.status-pending {
    color: var(--color-text-muted);
}

/* Validation messages */
.validation-error {
    color: var(--color-error);
    margin-bottom: 0.5rem;
}

.validation-warning {
    color: var(--color-warning);
    margin-bottom: 0.5rem;
}

.validation-info {
    color: var(--color-info);
    margin-bottom: 0.5rem;
}

/* Design summary */
.design-summary {
    background: #f8f9fa;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    padding: 1rem;
}

.design-summary table {
    border-collapse: collapse;
}

.design-summary td {
    padding: 0.25rem 0.5rem;
}

.design-summary td:first-child {
    text-align: right;
    padding-right: 1rem;
    white-space: nowrap;
}