:root {
    --primary: #6200ee;
    --primary-hover: #3700b3;
    --secondary: #03dac6;
    --secondary-hover: #018786;
    --surface: #ffffff;
    --background: #f5f5f5;
    --text: #1d1d1d;
    --border: #e0e0e0;
    --elevation-1: 0 2px 4px -1px rgba(0,0,0,0.2), 0 4px 5px 0 rgba(0,0,0,0.14), 0 1px 10px 0 rgba(0,0,0,0.12);
    --elevation-2: 0 3px 5px -1px rgba(0,0,0,0.2), 0 6px 10px 0 rgba(0,0,0,0.14), 0 1px 18px 0 rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
}

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

header {
    margin-bottom: 2rem;
    position: relative;
}

.back-button {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: var(--text);
    margin-bottom: 1rem;
    transition: var(--transition);
}

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

.back-button .material-icons {
    margin-right: 0.5rem;
}

h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
}

.generator {
    display: grid;
    grid-template-columns: 300px 1fr;
    grid-template-rows: auto auto;
    gap: 2rem;
}

.controls {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--elevation-1);
    grid-row: span 2;
}

.control-group {
    margin-bottom: 2rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.control-item {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

select, input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
}

select:focus, input:focus {
    outline: none;
    border-color: var(--primary);
}

.preview-section {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--elevation-1);
    min-height: 300px;
}

.preview-container {
    height: 100%;
    min-height: 300px;
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 1rem;
    position: relative;
}

.flex-container {
    width: 100%;
    height: 100%;
    display: flex;
    position: relative;
}

.flex-item {
    background: var(--primary);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.flex-item:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

.code-section {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--elevation-1);
    position: relative;
}

.code-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tab-button {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    color: #666;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.tab-button.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.code-container {
    background: #1e1e1e;
    border-radius: 8px;
    overflow: hidden;
}

.code-pane {
    display: none;
    padding: 1rem;
}

.code-pane.active {
    display: block;
}

pre {
    margin: 0;
    white-space: pre-wrap;
}

code {
    color: #fff;
    font-family: 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.copy-button {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

#snackbar {
    visibility: hidden;
    min-width: 250px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 8px;
    padding: 1rem;
    position: fixed;
    z-index: 1;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
}

#snackbar.show {
    visibility: visible;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

@keyframes fadein {
    from { bottom: 0; opacity: 0; }
    to { bottom: 30px; opacity: 1; }
}

@keyframes fadeout {
    from { bottom: 30px; opacity: 1; }
    to { bottom: 0; opacity: 0; }
}

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

    .controls {
        grid-row: auto;
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.modal.show {
    display: flex;
    opacity: 1;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--surface);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--elevation-2);
    transform: scale(0.9);
    transition: transform 0.3s ease-in-out;
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin: 0;
}

.close-button {
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition);
    border-radius: 50%;
}

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

.modal-body {
    padding: 1.5rem;
}

.modal-body section {
    margin-bottom: 1.5rem;
}

.modal-body section:last-child {
    margin-bottom: 0;
}

.modal-body h3 {
    color: var(--text);
    margin-bottom: 0.75rem;
}

.modal-body ul {
    list-style-type: none;
    padding-left: 0;
}

.modal-body li {
    margin-bottom: 0.5rem;
    color: #666;
}

.modal-body li strong {
    color: var(--text);
}

.help-button {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: #666;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
}

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