:root {
    --primary-color: #4361ee;
    --primary-hover: #3a56d4;
    --secondary-color: #3f37c9;
    --background-color: #ffffff;
    --surface-color: #f8f9fa;
    --text-color: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #4bb543;
    --error-color: #ff3333;
    --bg-image-opacity: 1;
}

[data-theme="dark"] {
    --primary-color: #4895ef;
    --primary-hover: #3a7bc8;
    --secondary-color: #4361ee;
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #343a40;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --bg-image-opacity: 1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s, color 0.3s;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.6;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.theme-toggle {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--surface-color);
}

main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.preview-section {
    background-color: var(--surface-color);
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.preview-container {
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border-radius: 0.5rem;
    background-color: white;
    border: 1px solid var(--border-color);
    position: relative;
}

.preview-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: inherit;
    background-size: inherit;
    background-position: inherit;
    background-repeat: inherit;
    opacity: var(--bg-image-opacity);
    z-index: -1;
}

.preview-text {
    max-width: 100%;
    word-wrap: break-word;
    text-align: center;
}

.controls-section {
    background-color: var(--surface-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.controls-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

.control-row {
    display: flex;
    gap: 1.5rem;
}

.control-row .control-group {
    flex: 1;
    margin-bottom: 0;
}

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

input[type="text"],
input[type="color"],
select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    background-color: var(--background-color);
    color: var(--text-color);
}

input[type="range"] {
    width: 100%;
    margin-top: 0.5rem;
}

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

.align-btn {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 0.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.shadow-controls,
.outline-controls,
.gradient-controls,
.bg-gradient-controls,
.border-controls {
    display: none;
    padding: 1rem;
    background-color: var(--background-color);
    border-radius: 0.375rem;
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
}

input[type="checkbox"]:checked ~ .shadow-controls,
input[type="checkbox"]:checked ~ .outline-controls,
input[type="checkbox"]:checked ~ .gradient-controls,
input[type="checkbox"]:checked ~ .bg-gradient-controls,
input[type="checkbox"]:checked ~ .border-controls {
    display: block;
}

.gradient-colors {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.gradient-color {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.remove-gradient-color,
.remove-bg-gradient-color {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
}

.remove-gradient-color:hover,
.remove-bg-gradient-color:hover {
    color: var(--error-color);
}

.code-section {
    background-color: var(--surface-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

#generated-css {
    background-color: var(--background-color);
    padding: 1rem;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    min-height: 150px;
    white-space: pre-wrap;
}

.presets-list {
    margin-top: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 1rem;
    background-color: var(--background-color);
    min-height: 100px;
}

.preset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.preset-item:last-child {
    border-bottom: none;
}

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

.preset-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
}

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

.bg-image-controls {
    display: none;
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--surface-color);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.upload-info {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

#bg-image-upload {
    display: block;
    width: 100%;
    padding: 0.5rem;
    background-color: var(--surface-color);
    color: var(--text-color);
    border: 1px dashed var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.bg-image-preview {
    margin: 1rem 0;
    text-align: center;
}

#uploaded-image {
    max-width: 100%;
    max-height: 150px;
    border-radius: 4px;
    box-shadow: 0 2px 4px var(--shadow-color);
    margin-bottom: 0.5rem;
}

.remove-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--error-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}

.remove-btn:hover {
    background-color: #cc0000;
}

/* Custom Font Upload styles */
.custom-font-controls {
    display: none; /* Hidden by default, will be shown when custom font is selected */
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--surface-color);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
    animation: fadeIn 0.3s ease-in-out;
}

.font-info {
    margin-top: 0.8rem;
}

.upload-info {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.font-name-display {
    margin-top: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

#custom-font-upload {
    display: block;
    width: 100%;
    padding: 0.5rem;
    background-color: var(--surface-color);
    color: var(--text-color);
    border: 1px dashed var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

#custom-font-upload:hover {
    border-color: var(--primary-color);
}

.font-preview {
    margin-top: 1rem;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--background-color);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* For mobile devices */
@media (max-width: 768px) {
    .app-container {
        padding: 1rem;
    }

    .control-row {
        flex-direction: column;
        gap: 1rem;
    }

    .preview-container {
        min-height: 150px;
        padding: 1rem;
    }

    #bg-image-upload {
        padding: 1rem;
        text-align: center;
    }
    
    .remove-btn {
        padding: 0.7rem 1.2rem;
        font-size: 1rem;
    }

    #custom-font-upload {
        padding: 1rem;
        text-align: center;
    }
}