:root {
    --bg-color: #050510;
    --text-color: #ffffff;
    --text-muted: #b0b0bb;
    --panel-bg: rgba(17, 17, 25, 0.7);
    --panel-border: rgba(101, 86, 183, 0.2);
    --primary: #6556b7;
    --primary-hover: #a48de9;
    --secondary: #1e293b;
    --secondary-hover: #334155;
    --success: #10b981;
    --danger: #ef4444;
    --info: #0ea5e9;
    --radius: 15px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Poppins', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--panel-border);
    z-index: 100;
}

.header-left a:hover {
    background: rgba(101, 86, 183, 0.2) !important;
    border-color: var(--primary) !important;
    transform: translateX(-3px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 1.5rem;
    color: var(--primary);
    filter: drop-shadow(0 0 5px var(--primary));
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 0%, #b0b0bb 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

#langSelect {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--panel-border);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

#langSelect:hover {
    border-color: var(--primary);
}

/* Main Layout */
.main-layout {
    flex: 1;
    display: flex;
    gap: 2rem;
    padding: 2rem;
    overflow: hidden;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tool-group h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 5px;
}

.input-row {
    display: flex;
    gap: 10px;
}

.input-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-wrapper label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

input[type="number"] {
    width: 100%;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 8px;
    font-size: 0.9rem;
    color: white;
    outline: none;
    transition: 0.3s;
}

input[type="number"]:focus {
    border-color: var(--primary);
    background: rgba(0,0,0,0.5);
}

/* Color Picker */
.color-picker-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.color-picker-wrapper label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

input[type="color"] {
    width: 100%;
    height: 40px;
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    cursor: pointer;
    background: none;
    padding: 2px;
}

/* Buttons */
.btn {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid transparent;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(101, 86, 183, 0.3);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(101, 86, 183, 0.4);
}

.btn-secondary {
    background: rgba(255,255,255,0.05);
    color: white;
    border-color: var(--panel-border);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
}

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

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: #ef4444;
    color: white;
}

.btn-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.btn-warning:hover {
    background: #f59e0b;
    color: white;
}

.btn-info {
    background: rgba(14, 165, 233, 0.1);
    color: #38bdf8;
    border: 1px solid rgba(14, 165, 233, 0.2);
}

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

/* Canvas Area */
.canvas-section {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0,0,0,0.2);
    border-radius: var(--radius);
    border: 1px solid var(--panel-border);
    overflow: auto;
    padding: 2rem;
}

#pixelart-container {
    background: #1e293b;
    padding: 1px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    border-radius: 4px;
}

#pixelart {
    display: grid;
    gap: 1px;
    background-color: #334155;
    border: 1px solid #334155;
}

.pixel {
    width: 25px;
    height: 25px;
    background-color: #050510;
    cursor: crosshair;
    transition: background-color 0.1s;
}

.pixel:hover {
    background-color: rgba(255,255,255,0.1);
}

/* Footer */
footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--panel-border);
    background: var(--panel-bg);
    margin-top: auto;
}

footer a:hover {
    color: var(--primary) !important;
}

@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
        overflow-y: auto;
    }

    .sidebar {
        width: 100%;
        order: 2;
    }

    .canvas-section {
        order: 1;
        min-height: 400px;
    }
}