:root {
    --neon-green: #00ff41;
    --neon-green-glow: #00ff41;
    --dark-bg: #000000;
    --card-bg: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #333333;
}

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

body {
    font-family: 'Rajdhani', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    padding-bottom: 90px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

.neon-title {
    font-family: 'Orbitron', monospace;
    font-size: 3rem;
    font-weight: 900;
    color: var(--neon-green);
    text-shadow: 
        0 0 10px var(--neon-green-glow),
        0 0 20px var(--neon-green-glow),
        0 0 30px var(--neon-green-glow),
        0 0 40px var(--neon-green-glow);
    margin-bottom: 20px;
    letter-spacing: 3px;
}

.neon-subtitle {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-green);
    text-shadow: 
        0 0 5px var(--neon-green-glow),
        0 0 10px var(--neon-green-glow);
    margin-bottom: 20px;
}

.neon-line {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-green), transparent);
    margin: 20px 0;
    box-shadow: 0 0 10px var(--neon-green-glow);
}

.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.budget-form {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 
        0 0 20px rgba(0, 255, 65, 0.1),
        inset 0 0 20px rgba(0, 255, 65, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--neon-green);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--neon-green);
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
}

.neon-button {
    background: linear-gradient(45deg, var(--neon-green), #00cc33);
    color: var(--dark-bg);
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 700;
    border-radius: 5px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 
        0 0 20px rgba(0, 255, 65, 0.5),
        inset 0 0 10px rgba(255, 255, 255, 0.2);
}

.neon-button:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 0 30px rgba(0, 255, 65, 0.8),
        inset 0 0 10px rgba(255, 255, 255, 0.3);
}

.budget-list {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 
        0 0 20px rgba(0, 255, 65, 0.1),
        inset 0 0 20px rgba(0, 255, 65, 0.05);
}

.budget-container {
    display: grid;
    gap: 15px;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 20px;
}

.empty-state p {
    margin-bottom: 10px;
}

.budget-item {
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.budget-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-green), transparent);
    box-shadow: 0 0 10px var(--neon-green-glow);
}

.budget-item:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 5px 20px rgba(0, 255, 65, 0.2),
        inset 0 0 20px rgba(0, 255, 65, 0.05);
}

.budget-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.budget-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--neon-green);
}

.budget-amount {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--text-primary);
}

.budget-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.budget-detail {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    border-bottom: 1px solid #333;
}

.budget-detail span:first-child {
    color: var(--text-secondary);
}

.budget-detail span:last-child {
    color: var(--text-primary);
    font-weight: 600;
}

.budget-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.action-button {
    padding: 8px 16px;
    border: 1px solid var(--neon-green);
    background-color: transparent;
    color: var(--neon-green);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 600;
}

.action-button:hover {
    background-color: var(--neon-green);
    color: var(--dark-bg);
    box-shadow: 0 0 15px var(--neon-green-glow);
}

.summary-section {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 
        0 0 20px rgba(0, 255, 65, 0.1),
        inset 0 0 20px rgba(0, 255, 65, 0.05);
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.summary-card {
    background-color: #1a1a1a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 255, 65, 0.2);
}

.summary-card h3 {
    color: var(--neon-green);
    font-size: 1rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.summary-card p {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text-primary);
}

.footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 20px;
    color: var(--text-secondary);
}

.footer p {
    margin-top: 20px;
    font-size: 14px;
}

.delete-button {
    border-color: #ff3333;
    color: #ff3333;
}

.delete-button:hover {
    background-color: #ff3333;
    color: white;
    box-shadow: 0 0 15px #ff3333;
}

/* WhatsApp floating button */
.whatsapp-btn {
    position: fixed;
    right: 18px;
    bottom: 18px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #25D366, #1DA851);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 6px 18px rgba(37,211,102,0.25), 0 2px 6px rgba(0,0,0,0.4);
    z-index: 1000;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    border: 2px solid rgba(255,255,255,0.06);
}

.whatsapp-btn:hover,
.whatsapp-btn:focus {
    transform: translateY(-4px);
    box-shadow: 0 10px 22px rgba(37,211,102,0.30);
    outline: none;
}

.whatsapp-icon {
    font-size: 26px;
    line-height: 1;
    display: inline-block;
    transform: translateY(1px);
}

/* Ensure touch-friendly and avoid overlap on small screens */
@media (max-width: 480px) {
    .whatsapp-btn {
        right: 14px;
        bottom: 14px;
        width: 56px;
        height: 56px;
    }

    .whatsapp-icon {
        font-size: 22px;
    }

    /* add some bottom padding to container so button doesn't cover content on very small heights */
    .container {
        padding-bottom: 90px;
    }
}

@media (max-width: 768px) {
    .neon-title {
        font-size: 2rem;
    }
    
    .neon-subtitle {
        font-size: 1.2rem;
    }
    
    .main-content {
        gap: 20px;
    }
    
    .budget-form,
    .budget-list,
    .summary-section {
        padding: 20px;
    }
    
    .budget-details {
        grid-template-columns: 1fr;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
}