/* ----------------- General Styles ----------------- */
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #dce35b, #45b649);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 50px;
}
.center-box {
    width: 90%;
    max-width: 900px;
    margin: 20px auto;
    text-align: center;
    padding: 30px;
    border-radius: 20px;
    background: white;
    box-shadow: 0 15px 50px rgba(0,0,0,0.2);
    transform: scale(0);
    opacity: 0;
    transition: 0.5s ease;
}
.center-box.show {
    transform: scale(1);
    opacity: 1;
}
h1, h2, h3 { color: #003366; margin-bottom: 20px; }
input, select {
    width: 90%;
    padding: 12px;
    margin: 10px 0;
    border-radius: 12px;
    border: 1px solid #888;
    font-size: 16px;
    transition: 0.3s;
}
input:focus { border-color: #0055ff; outline: none; }
button {
    padding: 12px 20px;
    margin: 10px;
    border-radius: 15px;
    border: none;
    background: #0055ff;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}
button:hover {
    background: #003ebf;
    transform: scale(1.05);
}
.hidden { display: none; }
small { color: #555; font-size: 0.85em; }

/* ----------------- Card Styles ----------------- */
.card {
    display: inline-block;
    width: 28%;
    margin: 10px 1%;
    padding: 25px;
    background: linear-gradient(to bottom right, #e8f0ff, #cce0ff);
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: 0.5s;
}
.card:hover { 
    transform: scale(1.05) rotate(1deg);
    background: linear-gradient(to bottom right, #cce0ff, #99ccff);
}

/* ----------------- Table Styles ----------------- */
table {
    width: 100%;
    margin-top: 20px;
    border-collapse: collapse;
}
th, td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: center;
    transition: 0.3s;
}
th { background: #0055ff; color: white; }
tr:nth-child(even) { background: #f2f2f2; }
tr:hover { background: #e0f0ff; }

/* ----------------- Popup Animation ----------------- */
.modal-container {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.4s forwards;
    z-index: 1000;
}
.modal-box {
    background: white;
    padding: 30px;
    border-radius: 20px;
    width: 70%;
    max-height: 80%;
    overflow-y: auto;
    animation: scaleIn 0.4s forwards;
}
@keyframes fadeIn { from {opacity:0;} to {opacity:1;} }
@keyframes scaleIn { from {transform: scale(0.8);} to {transform: scale(1);} }