:root {
    /* Color system */
    --color-primary: #2E3192;
    --color-primary-dark: #1e2161;
    --color-primary-light: #4c50b2;
    --color-accent: #209869;
    --color-accent-dark: #1a7d57;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Base styles */
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: #1F2937;
    line-height: 1.5;
}

/* Card Component */
.card {
    background: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* Button Component */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

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

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

/* Form Components */
.form-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #D1D5DB;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(46, 49, 146, 0.1);
}

/* Badge Component */
.badge {
    color: white;
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: var(--color-success);
    color: white;
}

.badge-warning {
    background: var(--color-warning);
    color: white;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Grid Layout */
.grid {
    display: grid;
    gap: var(--spacing-4);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (min-width: 640px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* Lottery Number Component */
.lottery-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    color: #1F2937;
    font-weight: 600;
    font-family: 'Inter', monospace;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.lottery-number.matched {
    background: linear-gradient(135deg, var(--color-success), var(--color-accent));
    color: white;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    background: white;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease-out;
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}

/* Number Grid Styles */
.number-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 0.5rem;
    padding: 1rem;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-top: 0.5rem;
}

.number-btn {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    border: 1px solid #e5e7eb;
    background: #f9fafb;
    color: #4b5563;
    cursor: pointer;
    transition: all 0.2s;
}

.number-btn:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
}

.number-btn.selected {
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

.number-btn:disabled {
    background: #e5e7eb; /* Lighter gray for disabled */
    color: #9ca3af;      /* Muted text color */
    cursor: not-allowed;
    border-color: #d1d5db;
}

.number-btn.selected:disabled {
    /* Ensure selected buttons look enabled even if technically disabled */
    /* This shouldn't happen with the current logic, but good fallback */
    background: var(--color-success);
    border-color: var(--color-success);
    color: white;
    cursor: pointer; /* Allow deselection */
}

.number-grid-container {
    position: relative;
    z-index: 10;
}