:root {
    --bg-darkest: #0f380f;
    --bg-dark: #1a4a1a;
    --bg-mid: #306230;
    --bg-light: #8bac0f;
    --bg-lightest: #9bbc0f;
    --text-primary: #9bbc0f;
    --text-secondary: #8bac0f;
    --text-dim: #306230;
    --accent: #9bbc0f;
    --danger: #c44040;
    --border: #306230;
    --card-bg: #1a2e0f;
}

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

body {
    font-family: 'Courier New', monospace;
    background: var(--bg-darkest);
    color: var(--text-primary);
    min-height: 100vh;
}

#navbar {
    background: var(--bg-dark);
    border-bottom: 2px solid var(--border);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
}

.nav-brand {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--bg-lightest);
    letter-spacing: 2px;
}

.nav-logo {
    display: inline-block;
    width: 12px;
    height: 12px;
    background: var(--bg-lightest);
    margin-right: 6px;
    vertical-align: middle;
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-links a, .nav-links button {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: color 0.15s;
}

.nav-links a:hover, .nav-links button:hover {
    color: var(--bg-lightest);
}

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

.auth-container {
    max-width: 380px;
    margin: 4rem auto;
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 2rem;
}

.auth-container h2 {
    color: var(--bg-lightest);
    margin-bottom: 1.5rem;
    text-align: center;
    letter-spacing: 2px;
    font-size: 1.1rem;
}

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

.auth-container .tab {
    flex: 1;
    padding: 0.5rem;
    text-align: center;
    cursor: pointer;
    color: var(--text-dim);
    background: none;
    border: none;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
}

.auth-container .tab.active {
    color: var(--bg-lightest);
    border-bottom-color: var(--bg-lightest);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    letter-spacing: 1px;
}

.form-group input {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-darkest);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    outline: none;
}

.form-group input:focus {
    border-color: var(--bg-light);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-mid);
    color: var(--bg-lightest);
    border: 2px solid var(--bg-light);
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    cursor: pointer;
    letter-spacing: 1px;
    transition: all 0.15s;
}

.btn:hover {
    background: var(--bg-light);
    color: var(--bg-darkest);
}

.btn-danger {
    background: transparent;
    border-color: var(--danger);
    color: var(--danger);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.error-msg {
    color: var(--danger);
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
    min-height: 1.2em;
}

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

.dashboard-header h1 {
    font-size: 1.2rem;
    letter-spacing: 2px;
    color: var(--bg-lightest);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.project-card {
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 1.25rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.project-card:hover {
    border-color: var(--bg-light);
}

.project-card h3 {
    font-size: 0.95rem;
    color: var(--bg-lightest);
    margin-bottom: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.project-card .meta {
    font-size: 0.7rem;
    color: var(--text-dim);
}

.project-card .actions {
    margin-top: 0.75rem;
    display: flex;
    gap: 0.5rem;
}

.new-project-card {
    border-style: dashed;
    border-color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.new-project-card:hover {
    border-color: var(--bg-light);
    color: var(--bg-light);
}

.editor-layout {
    display: grid;
    grid-template-columns: 200px 1fr 240px;
    gap: 1rem;
    height: calc(100vh - 80px);
}

.sprite-list {
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 0.75rem;
    overflow-y: auto;
}

.sprite-list h3 {
    font-size: 0.8rem;
    color: var(--bg-lightest);
    margin-bottom: 0.75rem;
    letter-spacing: 1px;
}

.sprite-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0.5rem;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border: 1px solid transparent;
    margin-bottom: 2px;
    transition: all 0.1s;
}

.sprite-item:hover {
    border-color: var(--border);
    color: var(--text-primary);
}

.sprite-item.active {
    border-color: var(--bg-light);
    background: var(--bg-darkest);
    color: var(--bg-lightest);
}

.sprite-item .sprite-thumb {
    width: 24px;
    height: 24px;
    image-rendering: pixelated;
}

.sprite-item .sprite-name {
    flex: 1;
    margin-left: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sprite-item .sprite-del {
    color: var(--text-dim);
    cursor: pointer;
    font-size: 0.75rem;
    padding: 0 0.25rem;
    background: none;
    border: none;
    font-family: 'Courier New', monospace;
}

.sprite-item .sprite-del:hover {
    color: var(--danger);
}

.editor-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.editor-tools {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.tool-btn {
    padding: 0.4rem 0.75rem;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.1s;
}

.tool-btn.active {
    border-color: var(--bg-lightest);
    color: var(--bg-lightest);
    background: var(--bg-mid);
}

.tool-btn:hover {
    border-color: var(--bg-light);
}

.color-palette {
    display: flex;
    gap: 4px;
    align-items: center;
}

.color-swatch {
    width: 28px;
    height: 28px;
    cursor: pointer;
    border: 2px solid var(--border);
    transition: border-color 0.1s;
    background-origin: border-box;
}

.color-swatch.transparent-swatch {
    background-image:
        linear-gradient(45deg, #b5c8a0 25%, transparent 25%),
        linear-gradient(-45deg, #b5c8a0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #b5c8a0 75%),
        linear-gradient(-45deg, transparent 75%, #b5c8a0 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    background-color: #d4e4c8;
}

.color-swatch.active {
    border-color: var(--bg-lightest);
    box-shadow: 0 0 4px var(--bg-lightest);
}

.pixel-grid {
    display: grid;
    grid-template-columns: repeat(8, 40px);
    grid-template-rows: repeat(8, 40px);
    border: 2px solid var(--border);
    background: var(--card-bg);
    user-select: none;
}

.pixel-cell {
    width: 40px;
    height: 40px;
    cursor: crosshair;
    border: 1px solid rgba(48, 98, 48, 0.3);
}

.pixel-cell:hover {
    outline: 2px solid var(--bg-lightest);
    outline-offset: -2px;
    z-index: 1;
}

.editor-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.preview-panel {
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 0.75rem;
}

.preview-panel h4 {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.preview-canvas {
    image-rendering: pixelated;
    display: block;
}

.sprite-info {
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 0.75rem;
}

.sprite-info h4 {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.sprite-info .info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-bottom: 0.25rem;
}

.sprite-info .info-val {
    color: var(--text-secondary);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal {
    background: var(--card-bg);
    border: 2px solid var(--border);
    padding: 1.5rem;
    min-width: 300px;
}

.modal h3 {
    font-size: 0.95rem;
    color: var(--bg-lightest);
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.modal .form-group {
    margin-bottom: 1rem;
}

.modal .modal-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 1.25rem;
}

.hidden {
    display: none !important;
}

.empty-state {
    text-align: center;
    color: var(--text-dim);
    padding: 3rem 1rem;
    font-size: 0.85rem;
}

.project-name-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.project-name-header h2 {
    font-size: 1rem;
    color: var(--bg-lightest);
    letter-spacing: 1px;
}

.back-link {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.8rem;
    cursor: pointer;
}

.back-link:hover {
    color: var(--text-secondary);
}

.undo-redo {
    display: flex;
    gap: 0.25rem;
}

.undo-redo .tool-btn {
    padding: 0.4rem 0.5rem;
    font-size: 0.85rem;
}