: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;
    padding: 20px;
}

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

header {
    margin-bottom: 2rem;
    position: relative;
    display: inline-flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
}

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

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

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

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

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

.help-button {
    position: relative;
    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);
}


.icon-wrapper {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(33, 150, 243, 0.2);
}

.icon-wrapper .material-icons {
    font-size: 28px;
    color: white;
}


.elevation-1 {
    box-shadow: var(--elevation-1);
}

.elevation-2 {
    box-shadow: var(--elevation-2);
}


.controls {
    background-color: var(--surface);
    padding: 24px;
    border-radius: 8px;
    margin-bottom: 24px;
    transition: var(--transition);
}

.header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    position: relative;
}


.header .btn-icon .material-icons {
    font-size: 32px;
    color: var(--primary-color);
}

h1 {
    color: var(--on-surface);
    font-weight: 500;
}

.header h1 {
    margin-bottom: 0;
    font-weight: 500;
    color: var(--primary);
}



.grid-controls {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 500;
    color: var(--on-surface);
    display: flex;
    align-items: center;
    gap: 8px;
}

label .material-icons {
    font-size: 20px;
    color: var(--primary-color);
}

.input-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
}

input[type="number"] {
    padding: 12px;
    border: 1px solid rgba(0, 0, 0, 0.23);
    border-radius: 4px;
    width: 100px;
    font-size: 16px;
    transition: var(--transition);
    background: var(--surface);
}

input[type="number"]:focus {
    border-color: var(--primary-color);
    outline: none;
}

input[type="number"]:hover {
    border-color: var(--on-surface);
}

.ripple-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

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

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

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

.btn-icon {
    padding: 8px;
    border-radius: 50%;
    background: none;
    color: var(--on-surface);
}

.btn-icon:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

button .material-icons {
    font-size: 18px;
}

.grid-container {
    background-color: var(--surface);
    padding: 24px;
    border-radius: 8px;
    margin-bottom: 24px;
    min-height: 400px;
    transition: var(--transition);
}

.masonry {
    column-count: 4;
    column-gap: 16px;
    width: 100%;
    min-height: 360px;
    background-color: var(--background);
    border-radius: 4px;
    padding: 16px;
    transition: var(--transition);
}

.masonry-item {
    background-color: var(--surface);
    break-inside: avoid;
    margin-bottom: 16px;
    padding: 16px;
    border-radius: 4px;
    cursor: move;
    user-select: none;
    transition: var(--transition);
    box-shadow: var(--elevation-1);
}

.masonry-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

.masonry-item.dragging {
    opacity: 0.7;
    transform: scale(0.95);
}

.masonry-item img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 12px;
}

.builder-grid {
    width: 100%;
    height: 200px;
    background-color: var(--background);
    background-image: 
        linear-gradient(rgba(255, 107, 107, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 107, 107, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    cursor: crosshair;
    border: 1px solid rgba(255, 107, 107, 0.2);
    transition: all 0.3s ease;
}

.builder-grid:hover {
    background-image: 
        linear-gradient(rgba(255, 107, 107, 0.15) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 107, 107, 0.15) 1px, transparent 1px);
    border-color: rgba(255, 107, 107, 0.3);
}

.builder-grid.active {
    background-color: rgba(255, 107, 107, 0.05);
    background-image: 
        linear-gradient(rgba(255, 107, 107, 0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 107, 107, 0.2) 1px, transparent 1px);
    border-color: var(--primary-color);
}

.builder-overlay {
    position: absolute;
    background-color: rgba(255, 107, 107, 0.15);
    border: 2px solid var(--primary-color);
    border-radius: 4px;
    pointer-events: none;
    transition: all 0.1s ease;
    box-shadow: 0 0 0 4px rgba(255, 107, 107, 0.1);
}

.builder-grid.active .builder-overlay {
    background-color: rgba(255, 107, 107, 0.2);
    box-shadow: 0 0 0 8px rgba(255, 107, 107, 0.15);
}

.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: ripple 0.6s linear;
    background-color: rgba(255, 255, 255, 0.7);
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.builder-info {
    margin-top: 8px;
    text-align: center;
    font-size: 14px;
    color: var(--on-surface);
    opacity: 0.7;
}

.code-output {
    background-color: var(--surface);
    padding: 24px;
    border-radius: 8px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 16px;
}

.code-header h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--on-surface);
}

.code-tabs {
    display: flex;
    gap: 8px;
}

.tab-button {
    background: none;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--on-surface);
    opacity: 0.7;
    transition: var(--transition);
}

.tab-button:hover {
    background-color: rgba(0, 0, 0, 0.04);
    opacity: 0.9;
}

.tab-button.active {
    background-color: var(--primary-color);
    color: white;
    opacity: 1;
}

.tab-content {
    background-color: var(--background);
    border-radius: 4px;
    overflow: hidden;
}

.tab-pane {
    display: none;
    padding: 16px;
}

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

pre {
    margin: 0;
    white-space: pre-wrap;
    font-family: 'Roboto Mono', monospace;
    font-size: 14px;
    line-height: 1.5;
}

#snackbar {
    visibility: hidden;
    min-width: 250px;
    background-color: #333;
    color: white;
    text-align: center;
    border-radius: 4px;
    padding: 16px;
    position: fixed;
    z-index: 1000;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    box-shadow: var(--elevation-2);
}

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

.grid-builder {
    margin: 24px 0;
    padding: 24px;
    border-radius: 8px;
    background-color: var(--surface);
}

.grid-builder h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    color: var(--on-surface);
}


.btn-icon {
    background: none;
    border: none;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: var(--transition);
    margin-left: auto;
}

.btn-icon:hover {
    background-color: rgba(98, 0, 238, 0.04);
}

.btn-icon:active {
    background-color: rgba(98, 0, 238, 0.08);
}

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

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

.modal-content {
    background-color: var(--surface);
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s;
}

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

.modal-header {
    padding: 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
    font-size: 20px;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: flex-end;
}

.instruction-step {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.instruction-step:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    flex-shrink: 0;
}

.step-content h3 {
    margin: 0 0 8px;
    font-size: 16px;
}

.step-content p {
    margin: 0;
    opacity: 0.7;
}

@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) {
    body {
        padding: 12px;
    }

    .controls,
    .grid-container,
    .code-output {
        padding: 16px;
    }

    .grid-controls {
        gap: 16px;
    }

    .code-header {
        flex-direction: column;
        align-items: stretch;
    }

    .code-tabs {
        justify-content: center;
    }

    #copyCode {
        width: 100%;
    }
}