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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --accent: #f093fb;
    --seb-color: #4facfe;
    --julie-color: #fa709a;
    --success: #48bb78;
    --warning: #f6ad55;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --text-dark: #2d3748;
    --text-light: #718096;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    min-height: 100vh;
    padding: 2rem;
    color: var(--text-dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.5s ease-in;
}

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

header {
    text-align: center;
    color: white;
    margin-bottom: 2rem;
    animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.config-section,
.calculator-section {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px var(--shadow-lg);
    animation: slideUp 0.7s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.config-section h2,
.calculator-section h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.config-card,
.expense-card {
    background: var(--bg-light);
    border-radius: 15px;
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.config-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--shadow);
}

.config-card h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.9rem;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: scale(1.02);
}

.input-group select {
    cursor: pointer;
    font-weight: 500;
}

.salary-percentages {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
    padding: 0.75rem;
    background: white;
    border-radius: 10px;
    font-weight: 600;
    color: var(--primary);
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.result-card {
    background: linear-gradient(135deg, var(--bg-light) 0%, white 100%);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    border: 3px solid;
    transition: all 0.4s ease;
    animation: popIn 0.5s ease-out;
}

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.seb-card {
    border-color: var(--seb-color);
}

.seb-card h3 {
    color: var(--seb-color);
}

.seb-card .amount {
    color: var(--seb-color);
    background: none;
    -webkit-text-fill-color: var(--seb-color);
}

.julie-card {
    border-color: var(--julie-color);
}

.julie-card h3 {
    color: var(--julie-color);
}

.julie-card .amount {
    color: var(--julie-color);
    background: none;
    -webkit-text-fill-color: var(--julie-color);
}

.result-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.amount {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 1rem 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

.details {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

.balance-card {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--success) 0%, #38a169 100%);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    box-shadow: 0 5px 20px rgba(72, 187, 120, 0.3);
    transition: all 0.3s ease;
    animation: slideIn 0.6s ease-out;
}

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

.balance-card.negative {
    background: linear-gradient(135deg, var(--warning) 0%, #dd6b20 100%);
    box-shadow: 0 5px 20px rgba(246, 173, 85, 0.3);
}

.balance-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .config-section,
    .calculator-section {
        padding: 1.5rem;
    }

    .config-grid,
    .results {
        grid-template-columns: 1fr;
    }

    .amount {
        font-size: 2rem;
    }
}

/* Animation pour les changements de valeur */
.updating {
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}