/**
 * 组件库 - 按钮、表单、卡片、加载状态、Toast、弹窗、徽章
 */

/* ========== 按钮体系 ========== */
.btn-primary {
    padding: 12px 24px;
    background: var(--accent-primary);
    color: #ffffff;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--fs-base);
    font-weight: 600;
    cursor: pointer;
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out),
        background var(--duration-fast) var(--ease-out);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 44px;
    user-select: none;
    box-shadow: var(--shadow-soft);
}
.btn-primary:hover {
    background: #d97a8a;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-primary-glow);
}
.btn-primary:active {
    transform: translateY(0) scale(0.98);
    box-shadow: var(--shadow-soft);
}
.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    padding: 12px 24px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    font-size: var(--fs-base);
    font-weight: 600;
    cursor: pointer;
    transition:
        transform var(--duration-base) var(--ease-spring),
        border-color var(--duration-fast) var(--ease-out),
        background var(--duration-fast) var(--ease-out);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 44px;
    user-select: none;
}
.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}
.btn-secondary:active {
    transform: translateY(0) scale(0.98);
}

.btn-text {
    padding: 8px 16px;
    background: transparent;
    color: var(--accent-secondary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--fs-base);
    font-weight: 500;
    cursor: pointer;
    transition:
        background var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out);
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}
.btn-text:hover {
    background: var(--accent-secondary-soft);
}
.btn-text:active {
    transform: scale(0.97);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition:
        background var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out),
        transform var(--duration-base) var(--ease-spring);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}
.btn-icon:active {
    transform: scale(0.92);
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: var(--space-5);
}
.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    font-weight: 500;
    letter-spacing: 0.2px;
}
.form-group input:not([type="checkbox"]):not([type="radio"]),
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: #ffffff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    color: #2c2420;
    font-size: var(--fs-base);
    font-family: inherit;
    min-height: 44px;
    transition:
        border-color var(--duration-fast) var(--ease-out),
        background var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out);
}
/* 表单内的 checkbox/radio 保持原生样式，避免被上述规则覆盖 */
.form-group input[type="checkbox"],
.form-group input[type="radio"] {
    width: auto;
    min-height: auto;
    padding: 0;
    background: transparent;
    border: none;
    color: inherit;
    accent-color: var(--accent-secondary);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}
.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--border-strong);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-secondary);
    background: #ffffff;
    box-shadow: 0 0 0 3px var(--accent-secondary-soft);
}
.form-group input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 覆盖浏览器自动填充样式，防止深色模式下背景/文字颜色冲突导致看不见 */
.form-group input:-webkit-autofill,
.form-group input:-webkit-autofill:hover,
.form-group input:-webkit-autofill:focus,
.form-group input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 1000px #ffffff inset !important;
    box-shadow: 0 0 0 1000px #ffffff inset !important;
    -webkit-text-fill-color: #2c2420 !important;
    caret-color: #2c2420;
    transition: background-color 5000s ease-in-out 0s;
}

/* ========== 卡片体系 ========== */
.card {
    background: var(--bg-paper);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    box-shadow: var(--shadow-soft);
    transition:
        transform var(--duration-base) var(--ease-out),
        box-shadow var(--duration-base) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out);
}
.card:hover {
    border-color: var(--border-medium);
}
.card-interactive {
    cursor: pointer;
}
.card-interactive:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    border-color: var(--accent-secondary);
}
.card-interactive:active {
    transform: translateY(0);
}

/* 玻璃拟态卡片 */
.card-glass {
    background: rgba(30, 30, 30, 0.6);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border: 1px solid var(--border-glass-strong);
    border-radius: var(--radius-lg);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* 强调卡片 - 顶部彩条 */
.card-accent {
    position: relative;
    overflow: hidden;
}
.card-accent::before {
    content: '';
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg,
        var(--accent-secondary),
        var(--accent-warm),
        var(--accent-primary));
    background-size: 200% 100%;
    animation: shimmerBar 4s linear infinite;
}
@keyframes shimmerBar {
    0%   { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* ========== 加载状态 ========== */
.global-loader {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    z-index: 9999;
    animation: fadeIn var(--duration-base) var(--ease-out);
}
.global-loader-text {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    letter-spacing: 0.5px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-light);
    border-top-color: var(--accent-secondary);
    border-right-color: var(--accent-warm);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
    box-shadow: 0 0 24px var(--accent-secondary-soft);
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Skeleton 骨架屏 */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-card) 0%,
        var(--bg-elevated) 50%,
        var(--bg-card) 100%
    );
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s linear infinite;
    border-radius: var(--radius-sm);
}
@keyframes skeletonShimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ========== Toast 提示（顶部弹出）========== */
.toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: var(--fs-base);
    font-weight: 500;
    z-index: 10000;
    opacity: 0;
    box-shadow: var(--shadow-medium);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    transition:
        transform var(--duration-base) var(--ease-spring),
        opacity var(--duration-base) var(--ease-out);
    max-width: 90vw;
    border: 1px solid transparent;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}
.toast-success {
    background: var(--accent-success);
    color: #ffffff;
}
.toast-error {
    background: var(--accent-error);
    color: #ffffff;
}
.toast-info {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--border-medium);
}
.toast-warning {
    background: #f59e0b;
    color: #000000;
    border-color: #d97706;
}

/* ========== 弹窗 ========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    padding: var(--space-4);
    animation: fadeIn var(--duration-base) var(--ease-out);
}
.modal-dialog {
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    max-width: 440px;
    width: 100%;
    box-shadow: var(--shadow-strong);
    animation: modalIn var(--duration-base) var(--ease-spring);
}
@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}
.modal-title {
    font-size: var(--fs-xl);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
    letter-spacing: 0.3px;
}
.modal-body {
    font-size: var(--fs-base);
    line-height: 1.7;
    margin-bottom: var(--space-6);
    color: var(--text-secondary);
}
.modal-message {
    font-size: var(--fs-md);
    margin-bottom: var(--space-6);
    text-align: center;
}
.modal-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

/* ========== 考试确认弹窗 ========== */
.exam-confirm-notices {
    text-align: left;
    background: var(--bg-card);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}
.exam-confirm-notice-title {
    font-size: var(--fs-md);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}
.exam-confirm-notice-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.exam-confirm-notice-list li {
    position: relative;
    padding: 6px 0 6px 22px;
    font-size: var(--fs-sm);
    line-height: 1.6;
    color: var(--text-secondary);
}
.exam-confirm-notice-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 8px var(--accent-primary-glow);
}

/* ========== 徽章 / 状态标签 ========== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    font-size: var(--fs-xs);
    font-weight: 500;
    border-radius: var(--radius-pill);
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    white-space: nowrap;
    line-height: 1.6;
}
.badge-success {
    background: rgba(76, 175, 80, 0.15);
    color: #66bb6a;
    border-color: rgba(76, 175, 80, 0.3);
}
.badge-error {
    background: var(--accent-primary-soft);
    color: var(--accent-primary);
    border-color: rgba(207, 102, 121, 0.3);
}
.badge-warning {
    background: var(--accent-warm-soft);
    color: var(--accent-warm);
    border-color: rgba(255, 183, 77, 0.3);
}
.badge-info {
    background: var(--accent-info-soft);
    color: var(--accent-info);
    border-color: rgba(100, 181, 246, 0.3);
}
.badge-accent {
    background: var(--accent-secondary-soft);
    color: var(--accent-secondary);
    border-color: rgba(3, 218, 198, 0.3);
}