/* ==========================================
   UI Components
   普慧康泰 - UI组件
   ========================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    user-select: none;
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.btn-outline {
    background: transparent;
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-300);
}

.btn-outline:hover {
    border-color: var(--color-gray-800);
    color: var(--color-gray-900);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-700);
}

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--color-gray-900);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
}

/* Cards */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-3);
    color: var(--color-gray-900);
    letter-spacing: -0.01em;
}

.card-text {
    color: var(--color-gray-500);
    line-height: var(--line-height-relaxed);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-sm);
}

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

.badge-secondary {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

.badge-success {
    background: var(--accent-green);
    color: var(--color-white);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-base);
    background: var(--color-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Navigation Links */
.nav-link {
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
}

.logo-icon {
    width: 48px;
    height: 48px;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.logo-subtitle {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-normal);
    color: var(--color-gray-500);
}

/* Icon Box */
.icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-4);
}

.icon-box-lg {
    width: 80px;
    height: 80px;
}

.icon-box-primary {
    background: rgba(0, 191, 165, 0.1);
    color: var(--color-green);
}

/* Stats Counter */
.stat {
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--spacing-2);
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--color-gray-500);
}

/* Divider */
.divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--spacing-8) 0;
}

.divider-vertical {
    width: 1px;
    height: 100%;
    background: var(--color-gray-200);
    margin: 0 var(--spacing-4);
}

/* Progress Bar */
.progress {
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--color-primary);
    transition: width var(--transition-slow);
}

/* Tooltip */
.tooltip {
    position: relative;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 1rem;
    background: var(--color-gray-900);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    margin-bottom: 0.5rem;
}

.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
}

/* Dropdown Menu Enhancements */
.nav-dropdown-menu {
    border-top: 3px solid var(--color-primary);
}

.nav-dropdown-section-item {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-dropdown-section-item::before {
    content: '→';
    position: absolute;
    left: -1rem;
    opacity: 0;
    transition: all 0.2s ease;
    color: var(--color-primary);
}

.nav-dropdown-section-item:hover::before {
    opacity: 1;
    left: -0.75rem;
}