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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #FFFFFF;
    color: #3D4C5C;
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

h1 {
    color: #0E2A47;
    font-size: 3rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.subtitle {
    color: #3D4C5C;
    font-size: 1.1rem;
    font-style: italic;
}

.input-section {
    background-color: #F4F7F6;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
    max-width: 400px;
}

label {
    color: #0E2A47;
    font-weight: 600;
    font-size: 0.95rem;
}

input[type="date"],
input[type="number"] {
    padding: 0.75rem;
    border: 2px solid #0E2A47;
    border-radius: 8px;
    font-size: 1rem;
    color: #3D4C5C;
    background-color: #FFFFFF;
}

input[type="date"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: #26D0CE;
}

.cta-button {
    background-color: #26D0CE;
    color: #0E2A47;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(38, 208, 206, 0.3);
}

.print-button {
    background-color: #0E2A47;
    color: #FFFFFF;
    border: none;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    margin: 2rem auto;
    display: block;
    transition: all 0.3s ease;
}

.print-button:hover {
    background-color: #1a3d5f;
}

.calendar-section {
    margin-top: 3rem;
}

.calendar-section.hidden {
    display: none;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: #F4F7F6;
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    border: 2px solid #0E2A47;
}

.stat-label {
    color: #3D4C5C;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    color: #0E2A47;
    font-size: 2.5rem;
    font-weight: 700;
}

.calendar {
    background-color: #FFFFFF;
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid #F4F7F6;
}

.year-row {
    display: flex;
    gap: 2px;
    margin-bottom: 2px;
}

.year-label {
    width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: #3D4C5C;
    font-weight: 600;
}

.weeks-container {
    display: flex;
    gap: 2px;
    flex: 1;
}

.week {
    width: 10px;
    height: 10px;
    border: 1px solid #F4F7F6;
    transition: all 0.2s ease;
}

.week.lived {
    background-color: #0E2A47;
    border-color: #0E2A47;
}

.week.future {
    background-color: #FFFFFF;
    border-color: #3D4C5C;
}

.week:hover {
    transform: scale(1.3);
    z-index: 10;
}

@media print {
    body {
        background-color: #FFFFFF;
    }
    
    .input-section,
    .print-button,
    .stats {
        display: none !important;
    }
    
    header {
        margin-bottom: 1rem;
        padding: 1rem 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .calendar {
        padding: 1rem;
        border: none;
    }
    
    .week {
        width: 8px;
        height: 8px;
    }
    
    .year-label {
        width: 30px;
        font-size: 0.6rem;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    .week {
        width: 6px;
        height: 6px;
    }
    
    .year-label {
        width: 30px;
        font-size: 0.6rem;
    }
}