:root {
    --primary: #6c5ce7;
    --primary-light: #a29bfe;
    --primary-dark: #5a4bd1;
    --secondary: #00cec9;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #e17055;
    --dark: #2d3436;
    --dark-light: #636e72;
    --gray: #b2bec3;
    --gray-light: #dfe6e9;
    --gray-lighter: #f5f6fa;
    --white: #ffffff;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--gray-lighter);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: inherit;
    transition: var(--transition);
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    transition: var(--transition);
    background: var(--white);
    color: var(--dark);
    width: 100%;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,92,231,0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.3px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108,92,231,0.3);
}

.btn-secondary {
    background: var(--gray-light);
    color: var(--dark);
}

.btn-secondary:hover {
    background: var(--gray);
    color: var(--white);
}

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

.btn-success:hover {
    filter: brightness(1.1);
}

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

.btn-danger:hover {
    filter: brightness(1.1);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: 600;
    font-size: 16px;
    flex-shrink: 0;
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: 24px;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: 12px;
}

.online-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--success);
    border: 2px solid var(--white);
    position: absolute;
    bottom: 0;
    right: 0;
}

.online-dot.offline {
    background: var(--gray);
}

.online-dot.busy {
    background: var(--danger);
}

.online-dot.away {
    background: var(--warning);
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 700;
    color: var(--white);
    background: var(--danger);
}

.badge-primary {
    background: var(--primary);
}

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 360px;
}

.toast-success {
    background: var(--success);
}

.toast-error {
    background: var(--danger);
}

.toast-warning {
    background: var(--warning);
    color: var(--dark);
}

.toast-info {
    background: var(--primary);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--gray-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px;
    max-width: 480px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--dark-light);
}

.modal-close:hover {
    background: var(--gray);
    color: var(--white);
}

.modal-body {
    margin-bottom: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--dark-light);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-state p {
    font-size: 14px;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gray);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-light);
}

@media (max-width: 768px) {
    .btn-lg {
        padding: 12px 24px;
        font-size: 14px;
    }
}

.payment-pwd-inputs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 16px 0;
}

.pwd-digit {
    width: 44px;
    height: 50px;
    text-align: center;
    font-size: 24px;
    border: 2px solid var(--gray);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s;
    -webkit-appearance: none;
    -moz-appearance: textfield;
}

.pwd-digit:focus {
    border-color: var(--primary);
}

.pwd-digit::-webkit-outer-spin-button,
.pwd-digit::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.confirm-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.confirm-modal {
    max-width: 380px;
    width: 90%;
    text-align: center;
    padding: 32px 24px 24px;
    animation: confirmIn 0.25s ease;
}

@keyframes confirmIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.confirm-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.confirm-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.confirm-message {
    font-size: 14px;
    color: var(--dark-light);
    line-height: 1.6;
    margin-bottom: 24px;
}

.confirm-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.confirm-actions .btn {
    min-width: 100px;
    padding: 10px 20px;
}