/*
 * Forms Catalog - Base Form Styles
 * Shared styles for all forms in the catalog
 */

:root {
    /* Colors */
    --primary-color: #1a365d;
    --primary-hover: #2d4a7c;
    --secondary-color: #e2e8f0;
    --secondary-hover: #cbd5e0;
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --border-color: #ddd;
    --background-light: #f8f9fa;
    --background-white: #fff;
    --error-color: #e53e3e;
    --success-color: #38a169;

    /* Spacing */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 30px;
    --spacing-2xl: 40px;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: #f5f5f5;
}

/* Container */
.form-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--background-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-container.compact {
    max-width: 600px;
}

/* Typography */
.form-title {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 2em;
    font-weight: 600;
}

.form-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.1em;
}

.section-title {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5em;
    font-weight: 600;
}

.section-subtitle {
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    font-size: 1.2em;
    font-weight: 500;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

label.required::after {
    content: " *";
    color: var(--error-color);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="number"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1em;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.1);
}

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

/* Checkbox & Radio Groups */
.checkbox-group,
.radio-group {
    margin-left: var(--spacing-xs);
}

.checkbox-group label,
.radio-group label {
    display: flex;
    align-items: center;
    font-weight: normal;
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-group input[type="checkbox"],
.radio-group input[type="radio"] {
    width: auto;
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-md);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s, transform 0.1s;
    font-family: inherit;
}

.btn:hover {
    transform: translateY(-1px);
}

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

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

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

.btn-primary:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

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

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

.btn-full {
    width: 100%;
}

.button-group {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

/* Helper Text */
.helper-text {
    font-size: 0.9em;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.error-text {
    font-size: 0.9em;
    color: var(--error-color);
    margin-top: var(--spacing-xs);
}

.success-text {
    font-size: 0.9em;
    color: var(--success-color);
    margin-top: var(--spacing-xs);
}

/* Form Sections */
.form-section {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 2px solid #e0e0e0;
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* Meta Information Box */
.meta-info {
    background: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
}

/* Validation States */
.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
    border-color: var(--error-color);
}

.form-group.has-success input,
.form-group.has-success textarea,
.form-group.has-success select {
    border-color: var(--success-color);
}

/* Loading State */
.btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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

/* Alert Messages */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background: #f0fdf4;
    border: 1px solid #86efac;
    color: #166534;
}

.alert-error {
    background: #fef2f2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}

.alert-info {
    background: #eff6ff;
    border: 1px solid #93c5fd;
    color: #1e40af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .form-container {
        padding: var(--spacing-lg);
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    .button-group .btn {
        width: 100%;
    }

    .form-title {
        font-size: 1.5em;
    }

    .section-title {
        font-size: 1.3em;
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: var(--spacing-md);
        border-radius: 0;
    }

    body {
        padding: 0;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        padding: 0;
    }

    .form-container {
        box-shadow: none;
        padding: var(--spacing-lg);
    }

    .button-group,
    .btn {
        display: none;
    }
}

/* Utility Classes */
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}