/* ========================================
   视创AI - 组件样式 components.css
   包含：按钮、输入框、卡片、弹窗、Toast、加载动画
   ======================================== */

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-family: var(--font-sans);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    background: rgba(108, 92, 231, 0.05);
}

.btn-secondary {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

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

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

.btn-danger:hover {
    opacity: 0.9;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 6px 16px;
    font-size: 0.85rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ========================================
   输入框
   ======================================== */
.input-group {
    margin-bottom: var(--space-md);
}

.input-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.input-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.input-hint {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

.input-field {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    outline: none;
}

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

.input-field::placeholder {
    color: var(--color-text-light);
}

textarea.input-field {
    resize: vertical;
    min-height: 80px;
    line-height: 1.6;
}

select.input-field {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23636E72' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

/* 标签选择器 */
.tag-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-option {
    padding: 8px 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    background: var(--color-surface);
    user-select: none;
}

.tag-option:hover {
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

.tag-option.selected {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
}

/* ========================================
   卡片
   ======================================== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.card-hover {
    transition: var(--transition);
    cursor: pointer;
}

.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   标签页 Tabs
   ======================================== */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--color-border-light);
    margin-bottom: var(--space-lg);
}

.tab {
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    border: none;
    background: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition-fast);
    font-family: var(--font-sans);
}

.tab:hover {
    color: var(--color-primary);
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ========================================
   加载动画
   ======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-text {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    animation: dot-bounce 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

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

@keyframes dot-bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* 行内加载 */
.loading-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.loading-inline .spinner {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

/* ========================================
   Toast 提示
   ======================================== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
    max-width: 360px;
}

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

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

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

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

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

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

.toast.removing {
    animation: slideOutRight 0.3s ease forwards;
}

/* ========================================
   弹窗 Modal
   ======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(45, 52, 54, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: scaleIn 0.2s ease;
}

.modal-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.15rem;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    color: var(--color-text-secondary);
}

.modal-close:hover {
    background: var(--color-danger);
    color: #fff;
}

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
}

/* ========================================
   空状态
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--color-text-light);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state-text {
    font-size: 0.95rem;
}

/* ========================================
   工具类
   ======================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-sm { font-size: 0.85rem; }
.text-lg { font-size: 1.1rem; }
.font-bold { font-weight: 700; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

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

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

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

.fade-in { animation: fadeIn 0.3s ease; }
.slide-up { animation: slideUp 0.4s ease; }