/* 1. RESET & BASE */
* {
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
    background: #f0f2f5;
    margin: 0;
    padding: 0 15px 15px 15px;
    color: #000;
}

/* 2. THE BLUE HEADER DNA */
header {
    background: #2563eb;
    margin: 0 -15px 25px -15px;
    padding: 25px 15px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.page-title {
    color: #ffffff;
    font-size: 2.2rem;
    font-weight: 900;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 3. INPUT BOXES */
input[type="text"], 
input[type="number"],
input {
    width: 100%;
    display: block;
    font-size: 2.5rem !important;
    font-weight: bold;
    padding: 25px !important;
    border: 5px solid #000 !important;
    border-radius: 12px;
    background-color: #ffffff;
    margin-bottom: 20px;
    color: #000;
}

/* REMOVE DATALIST DOWN ARROW */
input::-webkit-calendar-picker-indicator {
    display: none !important;
}

input:focus {
    outline: none;
}

/* 4. BUTTONS */
.btn {
    display: block;
    width: 100%;
    background: #2563eb;
    color: #ffffff;
    padding: 25px 0;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
    font-size: 2rem;
    border: none;
    border-radius: 12px;
    margin-bottom: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    cursor: pointer;
}

.btn:active {
    background: #1d4ed8;
    transform: translateY(2px);
}

/* 5. FEEDBACK */
#feedback {
    margin-top: 15px;
    font-weight: bold;
    color: #b30000;
    min-height: 1.5em;
    text-align: center;
    font-size: 1.2rem;
}