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

body {
    font-family: 'Vazirmatn', 'Tahoma', 'Arial', sans-serif;
    background: #e0e5ec;
    color: #44475a;
    padding: 20px;
    direction: rtl;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: #e0e5ec;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 8px 8px 16px #b8bec7, -8px -8px 16px #ffffff;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: none;
}

h1 {
    color: #4a5568;
    font-size: 22px;
    font-weight: 700;
    text-shadow: 1px 1px 2px #ffffff, -1px -1px 2px #b8bec7;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.badge {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
}

.admin-badge {
    background: linear-gradient(145deg, #e74c3c, #c0392b);
    color: #fff;
    box-shadow: 3px 3px 6px #b8bec7, -3px -3px 6px #ffffff;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: all 0.25s ease;
    font-weight: 500;
}

.btn:active {
    box-shadow: inset 3px 3px 6px #b8bec7, inset -3px -3px 6px #ffffff;
}

.btn-small {
    padding: 5px 12px;
    font-size: 12px;
}

.btn-primary {
    background: #e0e5ec;
    color: #3498db;
    box-shadow: 4px 4px 8px #b8bec7, -4px -4px 8px #ffffff;
}

.btn-primary:hover {
    box-shadow: 2px 2px 4px #b8bec7, -2px -2px 4px #ffffff;
}

.btn-success {
    background: #e0e5ec;
    color: #27ae60;
    box-shadow: 4px 4px 8px #b8bec7, -4px -4px 8px #ffffff;
}

.btn-success:hover {
    box-shadow: 2px 2px 4px #b8bec7, -2px -2px 4px #ffffff;
}

.btn-danger {
    background: #e0e5ec;
    color: #e74c3c;
    box-shadow: 4px 4px 8px #b8bec7, -4px -4px 8px #ffffff;
}

.btn-danger:hover {
    box-shadow: 2px 2px 4px #b8bec7, -2px -2px 4px #ffffff;
}

.btn-warning {
    background: #e0e5ec;
    color: #f39c12;
    box-shadow: 4px 4px 8px #b8bec7, -4px -4px 8px #ffffff;
}

.btn-warning:hover {
    box-shadow: 2px 2px 4px #b8bec7, -2px -2px 4px #ffffff;
}

.btn-outline {
    background: #e0e5ec;
    border: none;
    color: #718096;
    box-shadow: 4px 4px 8px #b8bec7, -4px -4px 8px #ffffff;
}

.btn-outline:hover {
    box-shadow: 2px 2px 4px #b8bec7, -2px -2px 4px #ffffff;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: #e0e5ec;
    margin: 10% auto;
    padding: 30px;
    width: 340px;
    border-radius: 20px;
    box-shadow: 12px 12px 24px #b8bec7, -12px -12px 24px #ffffff;
}

.modal-content h3 {
    margin-bottom: 18px;
    color: #4a5568;
    text-align: center;
    font-weight: 700;
}

.modal-content input[type="password"],
.modal-content input[type="text"] {
    width: 100%;
    padding: 10px 14px;
    border: none;
    border-radius: 12px;
    margin-bottom: 14px;
    font-size: 14px;
    font-family: inherit;
    background: #e0e5ec;
    color: #44475a;
    box-shadow: inset 3px 3px 6px #b8bec7, inset -3px -3px 6px #ffffff;
    outline: none;
    text-align: center;
}

.modal-content .btn {
    margin: 4px;
}

.error-msg {
    background: #e0e5ec;
    color: #e74c3c;
    padding: 10px;
    border-radius: 12px;
    margin-bottom: 12px;
    text-align: center;
    font-size: 13px;
    box-shadow: inset 3px 3px 6px #b8bec7, inset -3px -3px 6px #ffffff;
}

#studentSection {
    margin-bottom: 20px;
}

#studentInfo {
    background: #e0e5ec;
    padding: 14px 20px;
    border-radius: 16px;
    display: none;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    box-shadow: 6px 6px 12px #b8bec7, -6px -6px 12px #ffffff;
}

#studentNameDisplay {
    font-weight: bold;
    color: #2e7d32;
    font-size: 15px;
}

#newStudentForm {
    background: #e0e5ec;
    padding: 16px 20px;
    border-radius: 16px;
    display: none;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    box-shadow: 6px 6px 12px #b8bec7, -6px -6px 12px #ffffff;
}

#newStudentForm input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 10px 14px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-family: inherit;
    background: #e0e5ec;
    color: #44475a;
    box-shadow: inset 3px 3px 6px #b8bec7, inset -3px -3px 6px #ffffff;
    outline: none;
}

#newStudentForm input:focus {
    box-shadow: inset 4px 4px 8px #b8bec7, inset -4px -4px 8px #ffffff;
}

.table-wrapper {
    overflow-x: auto;
    margin-top: 20px;
    border-radius: 16px;
    padding: 4px;
    box-shadow: 6px 6px 12px #b8bec7, -6px -6px 12px #ffffff;
}

#practiceTable {
    width: 100%;
    border-collapse: collapse;
    min-width: 900px;
}

#practiceTable th {
    background: #e0e5ec;
    color: #4a5568;
    padding: 12px 8px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 1;
    box-shadow: inset 2px 2px 4px #b8bec7, inset -2px -2px 4px #ffffff;
}
#practiceTable th.score-col {
    border-left: 4px solid #c8cdd5;
}
#practiceTable th.score-col:last-of-type {
    border-left: none;
}
#practiceTable th.day-col {
    border-left: none;
}
#practiceTable th.num-col,
#practiceTable th.name-col,
#practiceTable th.rank-col,
#practiceTable th.total-col-header {
    border-left: none;
}

#practiceTable td {
    border: none;
    padding: 10px 6px;
    text-align: center;
    vertical-align: middle;
    font-size: 13px;
    background: #e0e5ec;
}
#practiceTable td.score-col {
    border-left: 4px solid #d0d5dd;
}
#practiceTable td.score-col:last-of-type {
    border-left: none;
}
#practiceTable td.day-col {
    border-left: none;
}
#practiceTable td.num-col,
#practiceTable td.name-col,
#practiceTable td.rank-col,
#practiceTable td.total-col-repeat {
    border-left: none;
}

#practiceTable tr:nth-child(even) td {
    background: #e4e9f0;
}

#practiceTable tr:hover td {
    background: #dce1e8;
}

.student-row td {
    background: #d4e8d0 !important;
    box-shadow: inset 0 0 0 2px rgba(76, 175, 80, 0.3);
}

.student-row:hover td {
    background: #c8e0c4 !important;
}

.upload-btn {
    background: #e0e5ec;
    color: #3498db;
    border: none;
    padding: 6px 14px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s;
    box-shadow: 3px 3px 6px #b8bec7, -3px -3px 6px #ffffff;
    margin-bottom: 6px;
}

.upload-btn:hover {
    box-shadow: 1px 1px 3px #b8bec7, -1px -1px 3px #ffffff;
}

.upload-btn:active {
    box-shadow: inset 2px 2px 4px #b8bec7, inset -2px -2px 4px #ffffff;
}

.file-list {
    list-style: none;
    font-size: 11px;
    text-align: center;
}

.file-list li {
    padding: 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.file-list a {
    color: #3498db;
    text-decoration: none;
    font-size: 12px;
    transition: color 0.2s;
}

.file-list a:hover {
    color: #2980b9;
    text-decoration: underline;
}

.file-list .file-icon {
    font-size: 14px;
}

.file-delete-btn {
    background: none;
    border: none;
    color: #e74c3c;
    cursor: pointer;
    font-size: 14px;
    padding: 0 2px;
    line-height: 1;
    transition: color 0.2s;
}

.file-delete-btn:hover {
    color: #c0392b;
}

input[type="number"] {
    background: #e0e5ec;
    border: none;
    border-radius: 10px;
    padding: 6px 8px;
    font-size: 13px;
    font-family: inherit;
    color: #4a5568;
    box-shadow: inset 2px 2px 4px #b8bec7, inset -2px -2px 4px #ffffff;
    outline: none;
    text-align: center;
    width: 55px;
}

input[type="number"]:focus {
    box-shadow: inset 3px 3px 6px #b8bec7, inset -3px -3px 6px #ffffff;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

.loading {
    text-align: center;
    padding: 30px;
    color: #718096;
    font-size: 14px;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #a0aec0;
    font-size: 14px;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 15px;
        border-radius: 14px;
    }
    h1 {
        font-size: 18px;
    }
    #practiceTable {
        font-size: 12px;
        min-width: 700px;
    }
    #practiceTable th,
    #practiceTable td {
        padding: 6px 4px;
        font-size: 11px;
    }
}