/* style.css — Email Signature Generator */

:root {
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --secondary-color: #6c757d;
    --secondary-hover-color: #5a6268;
    --background-color: #f4f7f6;
    --card-background-color: #ffffff;
    --text-color: #212529;
    --label-color: #495057;
    --border-color: #ced4da;
    --input-focus-border-color: #80bdff;
    --input-focus-box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
    --border-radius: 0.5rem;
    --box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.07);
    --column-gap: 30px;
}

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

.app-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
    box-sizing: border-box;
}

.app-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.app-header h2 {
    font-size: 2.25rem;
    color: var(--text-color);
    font-weight: 700;
    margin: 0;
}

.app-header .subtitle {
    color: var(--label-color);
    margin: 0.5rem 0 0;
}

.app-header .setup-note {
    font-size: 0.9rem;
    color: var(--secondary-color);
    background-color: #eef2f7;
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    max-width: 640px;
    margin: 1rem auto 0;
    line-height: 1.5;
}

.app-header .setup-note code {
    background: #dde5ee;
    padding: 0.1rem 0.35rem;
    border-radius: 0.25rem;
    font-size: 0.85em;
}

.gallery-section {
    background-color: var(--card-background-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: var(--column-gap);
}

.gallery-status {
    color: var(--secondary-color);
    margin: -0.5rem 0 1rem;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

.template-card {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    background-color: #fdfdfd;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.template-card:hover {
    border-color: var(--input-focus-border-color);
}

.template-card.selected {
    border-color: var(--primary-color);
    box-shadow: var(--input-focus-box-shadow);
}

.template-card-thumb {
    height: 140px;
    overflow: hidden;
    padding: 10px;
    box-sizing: border-box;
}

.template-card-thumb-inner {
    transform: scale(0.42);
    transform-origin: top left;
    width: 238%; /* 1 / 0.42, so content doesn't get clipped horizontally */
    pointer-events: none;
}

.main-content {
    display: flex;
    gap: var(--column-gap);
}

.form-column,
.preview-column {
    background-color: var(--card-background-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.form-column {
    flex: 1;
    box-sizing: border-box;
}

.preview-column {
    flex: 1.2;
    display: flex;
    box-sizing: border-box;
    flex-direction: column;
}

h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin-top: 0;
    margin-bottom: 1.5em;
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-weight: 500;
    color: var(--label-color);
    margin-bottom: 0.5rem;
}

input[type="text"],
input[type="email"],
input[type="tel"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius) - 2px);
    box-sizing: border-box;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    background-color: #fff;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus {
    outline: none;
    border-color: var(--input-focus-border-color);
    box-shadow: var(--input-focus-box-shadow);
}

input::placeholder {
    color: #999;
    opacity: 1;
}

.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    border-radius: var(--border-radius);
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    font-family: 'Inter', sans-serif;
    width: 100%;
    box-sizing: border-box;
}

.btn-primary {
    color: #fff;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

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

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

.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: auto;
    padding-top: 1.5rem;
}

.action-buttons .btn {
    flex-grow: 1;
}

.copy-status {
    text-align: center;
    min-height: 1.2em;
    margin: 0.5rem 0 0;
    font-size: 0.9rem;
    color: #2e7d32;
}

#preview {
    border: 1px solid #e0e0e0;
    padding: 20px;
    border-radius: var(--border-radius);
    background-color: #fdfdfd;
    min-height: 200px;
    overflow: auto;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
    flex-grow: 1;
}

#preview table {
    margin-left: 0 !important;
    margin-right: 0 !important;
}

@media (max-width: 992px) {
    .main-content {
        flex-direction: column;
    }
    .form-column, .preview-column {
        flex-basis: auto;
        width: 100%;
    }
    .preview-column {
        margin-top: var(--column-gap);
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: 20px 15px;
    }
    .app-header h2 {
        font-size: 2rem;
    }
    .form-column, .preview-column {
        padding: 20px;
    }
    h3 {
        font-size: 1.35rem;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    .action-buttons {
        flex-direction: column;
    }
    .action-buttons .btn {
        width: 100%;
    }
}