/**
 * KS Social Design System — LinkedIn++ Premium
 * ============================================
 * Import this file first in all KS Social stylesheets
 */

:root {
    /* Colors */
    --ks-bg: #f5f7fb;
    --ks-card: #ffffff;
    --ks-border: rgba(15, 23, 42, 0.08);
    --ks-text: #0f172a;
    --ks-muted: rgba(15, 23, 42, 0.65);
    --ks-primary: #0b6ea8;
    --ks-primary-hover: #085b89;
    --ks-primary-light: rgba(11, 110, 168, 0.08);
    --ks-success: #16a34a;
    --ks-danger: #dc2626;
    --ks-shadow: 0 10px 30px rgba(2, 8, 23, 0.08);
    --ks-shadow-hover: 0 14px 40px rgba(2, 8, 23, 0.12);

    /* Radius */
    --ks-radius: 18px;
    --ks-radius-sm: 12px;
    --ks-radius-xs: 8px;
    --ks-radius-full: 9999px;

    /* Spacing */
    --ks-gap: 16px;
    --ks-gap-lg: 24px;
    --ks-pad: 18px;
    --ks-pad-sm: 12px;

    /* Layout */
    --ks-container-max: 1180px;
    --ks-sidebar-width: 320px;

    /* Typography */
    --ks-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --ks-font-size-xl: 24px;
    --ks-font-size-lg: 18px;
    --ks-font-size-md: 15px;
    --ks-font-size-sm: 14px;
    --ks-font-size-xs: 13px;
    --ks-font-size-xxs: 12px;

    /* Transitions */
    --ks-transition: 150ms ease;
}

/* Base Reset */
.ks-social-shell *,
.ks-social-shell *::before,
.ks-social-shell *::after {
    box-sizing: border-box;
}

/* Container */
.ks-container {
    max-width: var(--ks-container-max);
    margin: 0 auto;
    padding: 24px 16px;
}

/* 2-Column Layout */
.ks-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--ks-sidebar-width);
    gap: var(--ks-gap-lg);
    align-items: start;
}

.ks-layout--single {
    grid-template-columns: minmax(0, 1fr);
}

.ks-layout__main {
    min-width: 0;
}

.ks-layout__sidebar {
    min-width: 0;
}

/* Cards */
.ks-card {
    background: var(--ks-card);
    border: 1px solid var(--ks-border);
    border-radius: var(--ks-radius);
    box-shadow: var(--ks-shadow);
    transition: box-shadow var(--ks-transition);
}

.ks-card:hover {
    box-shadow: var(--ks-shadow-hover);
}

.ks-card--flat {
    box-shadow: none;
}

.ks-card--flat:hover {
    box-shadow: none;
}

/* Buttons */
.ks-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 40px;
    padding: 0 20px;
    font-family: var(--ks-font);
    font-size: var(--ks-font-size-sm);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--ks-radius-full);
    cursor: pointer;
    transition: all var(--ks-transition);
    white-space: nowrap;
}

.ks-btn--sm {
    height: 34px;
    padding: 0 14px;
    font-size: var(--ks-font-size-xs);
}

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

.ks-btn--primary:hover {
    background: var(--ks-primary-hover);
}

.ks-btn--secondary {
    background: rgba(15, 23, 42, 0.06);
    color: var(--ks-text);
}

.ks-btn--secondary:hover {
    background: rgba(15, 23, 42, 0.1);
}

.ks-btn--ghost {
    background: transparent;
    color: var(--ks-primary);
}

.ks-btn--ghost:hover {
    background: var(--ks-primary-light);
}

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

.ks-btn--danger:hover {
    background: #b91c1c;
}

.ks-btn--icon {
    width: 40px;
    padding: 0;
}

.ks-btn--icon.ks-btn--sm {
    width: 34px;
}

.ks-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Inputs */
.ks-input {
    width: 100%;
    height: 44px;
    padding: 0 16px;
    font-family: var(--ks-font);
    font-size: var(--ks-font-size-sm);
    color: var(--ks-text);
    background: var(--ks-card);
    border: 1px solid var(--ks-border);
    border-radius: var(--ks-radius-sm);
    outline: none;
    transition: border-color var(--ks-transition), box-shadow var(--ks-transition);
}

.ks-input:focus {
    border-color: var(--ks-primary);
    box-shadow: 0 0 0 3px var(--ks-primary-light);
}

.ks-input::placeholder {
    color: var(--ks-muted);
}

.ks-input--rounded {
    border-radius: var(--ks-radius-full);
}

textarea.ks-input {
    height: auto;
    min-height: 80px;
    padding: 12px 16px;
    resize: vertical;
}

select.ks-input {
    cursor: pointer;
}

/* Avatar */
.ks-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.ks-avatar--xs { width: 32px; height: 32px; }
.ks-avatar--sm { width: 40px; height: 40px; }
.ks-avatar--md { width: 56px; height: 56px; }
.ks-avatar--lg { width: 80px; height: 80px; }
.ks-avatar--xl { width: 120px; height: 120px; }

/* Badge */
.ks-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    background: var(--ks-primary);
    border-radius: 10px;
}

.ks-badge--danger {
    background: var(--ks-danger);
}

.ks-badge--dot {
    min-width: 10px;
    width: 10px;
    height: 10px;
    padding: 0;
}

/* Typography */
.ks-title {
    margin: 0;
    font-size: var(--ks-font-size-xl);
    font-weight: 700;
    color: var(--ks-text);
    line-height: 1.3;
}

.ks-title--sm {
    font-size: var(--ks-font-size-lg);
    font-weight: 600;
}

.ks-text {
    margin: 0;
    font-size: var(--ks-font-size-md);
    color: var(--ks-text);
    line-height: 1.5;
}

.ks-text--muted {
    color: var(--ks-muted);
}

.ks-text--sm {
    font-size: var(--ks-font-size-sm);
}

.ks-text--xs {
    font-size: var(--ks-font-size-xxs);
}

/* Links */
.ks-link {
    color: var(--ks-primary);
    text-decoration: none;
    transition: color var(--ks-transition);
}

.ks-link:hover {
    color: var(--ks-primary-hover);
    text-decoration: underline;
}

/* Divider */
.ks-divider {
    height: 1px;
    background: var(--ks-border);
    border: none;
    margin: var(--ks-gap) 0;
}

/* Empty State */
.ks-empty {
    padding: 48px 24px;
    text-align: center;
    color: var(--ks-muted);
}

.ks-empty__icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* Loading */
.ks-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
    color: var(--ks-muted);
}

/* Tabs */
.ks-tabs {
    display: flex;
    gap: 4px;
    padding: 6px;
    background: rgba(15, 23, 42, 0.04);
    border-radius: var(--ks-radius-full);
    width: fit-content;
}

.ks-tabs__item {
    padding: 8px 16px;
    font-size: var(--ks-font-size-sm);
    font-weight: 500;
    color: var(--ks-muted);
    background: transparent;
    border: none;
    border-radius: var(--ks-radius-full);
    cursor: pointer;
    transition: all var(--ks-transition);
}

.ks-tabs__item:hover {
    color: var(--ks-text);
}

.ks-tabs__item.active {
    background: var(--ks-card);
    color: var(--ks-text);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* User Card (for lists) */
.ks-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: var(--ks-pad);
    background: var(--ks-card);
    border-bottom: 1px solid var(--ks-border);
    transition: background var(--ks-transition);
}

.ks-user-card:last-child {
    border-bottom: none;
}

.ks-user-card:hover {
    background: rgba(15, 23, 42, 0.02);
}

.ks-user-card__info {
    flex: 1;
    min-width: 0;
}

.ks-user-card__name {
    font-weight: 600;
    font-size: var(--ks-font-size-md);
    color: var(--ks-text);
    text-decoration: none;
}

.ks-user-card__name:hover {
    color: var(--ks-primary);
}

.ks-user-card__meta {
    font-size: var(--ks-font-size-xs);
    color: var(--ks-muted);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ks-user-card__actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* Counters (for profile stats) */
.ks-counters {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    font-size: var(--ks-font-size-sm);
    color: var(--ks-muted);
}

.ks-counters__item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: var(--ks-radius-xs);
    text-decoration: none;
    color: var(--ks-muted);
    transition: all var(--ks-transition);
}

.ks-counters__item:hover {
    background: var(--ks-primary-light);
    color: var(--ks-primary);
}

.ks-counters__item strong {
    color: var(--ks-text);
    font-weight: 600;
}

.ks-counters__divider {
    color: rgba(15, 23, 42, 0.3);
}

/* Form Group */
.ks-form-group {
    margin-bottom: 20px;
}

.ks-form-group__label {
    display: block;
    font-size: var(--ks-font-size-sm);
    font-weight: 500;
    color: var(--ks-text);
    margin-bottom: 8px;
}

.ks-form-group__hint {
    font-size: var(--ks-font-size-xxs);
    color: var(--ks-muted);
    margin-top: 6px;
}

/* Page Header */
.ks-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ks-gap);
    padding: var(--ks-pad);
    background: var(--ks-card);
    border: 1px solid var(--ks-border);
    border-radius: var(--ks-radius);
    margin-bottom: var(--ks-gap);
}

.ks-page-header__title {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--ks-text);
}

.ks-page-header__count {
    font-size: var(--ks-font-size-sm);
    color: var(--ks-muted);
    font-weight: 400;
    margin-left: 8px;
}

/* Mobile Responsive */
@media (max-width: 900px) {
    .ks-layout {
        grid-template-columns: 1fr;
    }

    .ks-layout__sidebar {
        order: -1;
    }
}

@media (max-width: 640px) {
    :root {
        --ks-pad: 14px;
        --ks-gap: 12px;
        --ks-radius: 14px;
    }

    .ks-container {
        padding: 16px 12px;
    }

    .ks-page-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .ks-counters {
        justify-content: center;
    }
}