:root {
    --bg-color: #0a0b1e;
    --card-bg: rgba(255, 255, 255, 0.05);
    --accent-primary: #00f2ff;
    --accent-secondary: #7000ff;
    --text-primary: #ffffff;
    --text-secondary: #b0b0d0;
    --glass-border: rgba(255, 255, 255, 0.1);
    --kite-color: #00f2ff;
    --dart-color: #ff007a;
    --phi: 1.618033988749895;
    --font-family: 'Inter', 'Outfit', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 242, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(112, 0, 255, 0.05) 0%, transparent 40%);
    color: var(--text-primary);
    font-family: var(--font-family);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

header {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 11, 30, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

button {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

button.active {
    background: var(--accent-primary);
    color: var(--bg-color);
    border-color: var(--accent-primary);
}

.set-selector {
    display: flex;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 0.2rem;
    border-radius: 10px;
    margin-right: 0.5rem;
}

.set-selector button {
    border: none;
    padding: 0.4rem 1rem;
}

.set-selector button.active {
    background: var(--accent-primary);
    color: var(--bg-color);
}

.hidden {
    display: none !important;
}

main {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
}

#canvas-container {
    flex: 1;
    position: relative;
    cursor: crosshair;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

aside {
    width: 320px;
    background: rgba(10, 11, 30, 0.6);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--glass-border);
    padding: 2rem;
    overflow-y: auto;
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    border-radius: 12px;
}

.info-card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.info-card p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.shape-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.shape-btn {
    flex-direction: column;
    padding: 1rem;
    height: auto;
}

.shape-preview {
    width: 40px;
    height: 40px;
    margin-bottom: 0.5rem;
}

.stats {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.toast {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 0, 122, 0.2);
    border: 1px solid #ff007a;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    backdrop-filter: blur(10px);
    color: #ff007a;
    font-weight: 600;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

.toast.visible {
    opacity: 1;
}

.special-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-color) !important;
    font-weight: 700 !important;
    border: none !important;
    padding: 0.6rem 1.2rem;
}

/* Modal Styling */
.modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.visible {
    display: flex;
}

.modal-content {
    background: rgba(20, 20, 40, 0.95);
    border: 1px solid var(--glass-border);
    padding: 3rem;
    border-radius: 24px;
    width: 90%;
    max-width: 800px;
    position: relative;
    box-shadow: 0 0 50px rgba(0, 242, 255, 0.1);
}

.close-btn {
    position: absolute;
    top: 1.5rem; right: 1.5rem;
    background: none; border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
}

.modal-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

.modal-section h3 {
    margin-bottom: 0.8rem;
    color: var(--accent-primary);
}

.shortcuts-guide {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 12px;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 0.9rem;
}