:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --input-bg: rgba(15, 23, 42, 0.6);
    --border-color: rgba(148, 163, 184, 0.1);
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Background Gradients */
body::before {
    content: '';
    position: fixed;
    top: -20%;
    left: -10%;
    width: 50%;
    height: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -20%;
    right: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, rgba(15, 23, 42, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    padding-top: 2rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
    letter-spacing: -0.05em;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Main Layout */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Controls Panel */
.controls {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

.control-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-row {
    display: flex;
    gap: 1rem;
}

.input-wrapper {
    flex: 1;
}

input[type="number"],
input[type="text"] {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
}

input[type="number"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.5rem;
    gap: 0.5rem;
}

input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    background: none;
    padding: 0;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 0.5rem;
}

.hex-input {
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    font-family: 'Monaco', 'Courier New', monospace !important;
    text-transform: uppercase;
}

/* Preview Section */
.preview-container {
    position: sticky;
    top: 2rem;
}

.preview-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 2rem;
    /* reduced padding */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.image-canvas-wrapper {
    width: 100%;
    min-height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image:
        linear-gradient(45deg, #1e293b 25%, transparent 25%),
        linear-gradient(-45deg, #1e293b 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1e293b 75%),
        linear-gradient(-45deg, transparent 75%, #1e293b 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    border-radius: 1rem;
    overflow: hidden;
    padding: 1rem;
    /* Padding inside the checkered area */
}

.preview-image {
    max-width: 100%;
    height: auto;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    border-radius: 4px;
    /* Determine smooth scaling */
    transition: all 0.3s ease;
}

.url-display {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 0.75rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    color: #a5b4fc;
    word-break: break-all;
    cursor: pointer;
    position: relative;
    transition: background 0.2s;
    border: 1px solid rgba(99, 102, 241, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.url-display:hover {
    background: rgba(0, 0, 0, 0.5);
}

.copy-icon {
    opacity: 0.7;
}

.actions {
    display: flex;
    gap: 1rem;
    width: 100%;
}

.btn {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #10b981;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    font-weight: 600;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Copy Button Styles */
.copy-btn-mini {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #94a3b8;
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 0.4rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 1rem;
}

.copy-btn-mini:hover {
    background: rgba(99, 102, 241, 0.2);
    color: #818cf8;
}

.snippet-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}