/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 40px var(--shadow);
    margin-bottom: 20px;
    transition: background 0.3s ease;
}

/* Buttons */
.btn {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #764ba2);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #20c997);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: #333;
}

.btn-info {
    background: var(--info);
    color: white;
}

.btn-block {
    width: 100%;
}

/* Messages */
.alert {
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: bold;
}

.alert-success {
    background: var(--success);
    color: white;
}

.alert-warning {
    background: var(--warning);
    color: #333;
}

.alert-danger {
    background: var(--danger);
    color: white;
}

.alert-info {
    background: var(--info);
    color: white;
}

/* Forms */
.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-primary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: border-color 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
}

/* Checkboxes */
.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    background: var(--checkbox-bg);
    padding: 12px;
    border-radius: 8px;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-item:hover {
    background: var(--checkbox-hover);
    border-color: var(--accent);
}

.checkbox-item.checked {
    background: var(--checkbox-checked);
    border-color: var(--accent);
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: var(--accent);
}

.checkbox-item label {
    margin: 0;
    cursor: pointer;
    flex: 1;
    font-weight: normal;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    padding: 12px 18px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.5em;
    box-shadow: 0 4px 15px var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.dark-mode-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px var(--shadow);
}

.table thead {
    background: var(--accent);
    color: white;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tbody tr {
    transition: background 0.3s ease;
}

.table tbody tr:hover {
    background: var(--checkbox-hover);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

/* Animations */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

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

/* Helper classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }

.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    h1 {
        font-size: 2em;
    }

    .card {
        padding: 20px;
    }

    .dark-mode-toggle {
        top: 10px;
        right: 10px;
        padding: 10px 14px;
        font-size: 1.2em;
    }

    .checkbox-group {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 8px;
    }
}