/* ============================================================
   SellerHelp - Design System
   Theme: Corporate Modern (Trust + Automation + Operational Efficiency)
   Spec: branches/bli/layout/sellerhelp_core/DESIGN.md
   ============================================================ */

/* ---------- 1. Design Tokens ---------- */
:root {
  /* Brand: deep navy authority + sky-blue action */
  --color-primary: #022448;
  --color-primary-dark: #001c3b;
  --color-primary-light: #2D486D;
  --color-primary-fixed: #D5E3FF;
  --color-on-primary: #FFFFFF;

  --color-secondary: #0EA5E9;
  --color-secondary-dark: #0284C7;
  --color-secondary-light: #38BDF8;
  --color-on-secondary: #FFFFFF;

  /* Context sidebars (sidebar identifies role) */
  --sidebar-bg-client:    #1E3A5F;
  --sidebar-bg-admin:     #5B21B6;
  --sidebar-bg-affiliate: #0F766E;

  /* Surface and background */
  --color-background: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-surface-low: #F4F3F7;
  --color-surface-container: #EEEDF1;
  --color-surface-high: #E9E7EB;
  --color-surface-highest: #E3E2E6;

  /* Text */
  --color-on-surface: #1A1C1E;
  --color-on-surface-variant: #43474E;
  --color-text-muted: #64748B;

  /* Borders */
  --color-outline: #74777F;
  --color-outline-variant: #E2E8F0;
  --color-divider: #E9E7EB;

  /* Functional / status */
  --color-success: #16A34A;
  --color-success-bg: #DCFCE7;
  --color-warning: #D97706;
  --color-warning-bg: #FEF3C7;
  --color-error: #DC2626;
  --color-error-bg: #FEE2E2;
  --color-info: #2563EB;
  --color-info-bg: #DBEAFE;

  /* Spacing (8px base unit) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius (DESIGN.md: buttons 6px, cards 8px, badges full) */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 4px 12px rgba(15, 23, 42, 0.12);
  --shadow-xl: 0 8px 24px rgba(15, 23, 42, 0.16);

  /* Layout */
  --sidebar-width: 240px;
  --topbar-height: 64px;

  /* Typography (DESIGN.md: Inter exclusively) */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 28px;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  --z-sidebar: 50;
  --z-topbar: 40;
  --z-dropdown: 60;
  --z-modal: 100;
  --z-toast: 200;
}

/* ---------- 2. Reset / Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html, body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-on-surface);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-secondary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-secondary-dark); }

button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: var(--font-size-base); color: var(--color-on-surface); }
img { max-width: 100%; height: auto; display: block; }
table { border-collapse: collapse; width: 100%; }

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* ---------- 3. Typography helpers ---------- */
.h-xl     { font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); line-height: 1.2; letter-spacing: -0.02em; }
.h-lg     { font-size: var(--font-size-xl);  font-weight: var(--font-weight-bold); line-height: 1.3; letter-spacing: -0.02em; }
.h-md     { font-size: var(--font-size-lg);  font-weight: var(--font-weight-semibold); line-height: 1.4; }
.body-lg  { font-size: var(--font-size-md);  line-height: 1.6; }
.body-md  { font-size: var(--font-size-base); line-height: 1.5; }
.label    { font-size: var(--font-size-sm); font-weight: var(--font-weight-medium); letter-spacing: 0.05em; text-transform: uppercase; color: var(--color-on-surface-variant); }
.caption  { font-size: var(--font-size-sm); color: var(--color-on-surface-variant); }
.text-muted   { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-error   { color: var(--color-error); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-center  { text-align: center; }
.text-right   { text-align: right; }

/* ---------- 4. Utility (minimal flex/grid helpers) ---------- */
.flex          { display: flex; }
.inline-flex   { display: inline-flex; }
.grid          { display: grid; }
.items-center  { align-items: center; }
.items-start   { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.justify-end     { justify-content: flex-end; }
.flex-col      { flex-direction: column; }
.flex-1        { flex: 1; }
.gap-1 { gap: var(--space-1); } .gap-2 { gap: var(--space-2); } .gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); } .gap-6 { gap: var(--space-6); } .gap-8 { gap: var(--space-8); }
.mt-2 { margin-top: var(--space-2); } .mt-4 { margin-top: var(--space-4); } .mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); } .mb-4 { margin-bottom: var(--space-4); } .mb-6 { margin-bottom: var(--space-6); }
.w-full { width: 100%; } .h-full { height: 100%; }
.hidden { display: none; }

/* ---------- 5. Layout: App Shell ---------- */
.app { min-height: 100vh; }

.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-width); height: 100vh;
  background-color: var(--sidebar-bg-client);
  color: rgba(255, 255, 255, 0.85);
  display: flex; flex-direction: column;
  z-index: var(--z-sidebar);
  box-shadow: var(--shadow-md);
}
.sidebar--admin     { background-color: var(--sidebar-bg-admin); }
.sidebar--affiliate { background-color: var(--sidebar-bg-affiliate); }

.sidebar__brand { padding: var(--space-6) var(--space-6) var(--space-8); }
.sidebar__brand-title { color: #fff; font-size: var(--font-size-xl); font-weight: var(--font-weight-bold); }
.sidebar__brand-subtitle { color: rgba(255, 255, 255, 0.6); font-size: var(--font-size-sm); text-transform: uppercase; letter-spacing: 0.05em; margin-top: var(--space-1); }

.sidebar__nav { flex: 1; overflow-y: auto; padding: 0 var(--space-2); }
.sidebar__nav-section + .sidebar__nav-section {
  margin-top: var(--space-4); padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar__link {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-lg);
  margin: var(--space-1) 0;
  font-size: var(--font-size-base);
  position: relative;
  transition: background-color var(--transition-base), color var(--transition-base);
}
.sidebar__link:hover { background-color: rgba(255, 255, 255, 0.1); color: #fff; }
.sidebar__link--active {
  background-color: rgba(255, 255, 255, 0.15); color: #fff;
  font-weight: var(--font-weight-semibold);
}
.sidebar__link--active::before {
  content: ''; position: absolute; left: -2px; top: 8px; bottom: 8px;
  width: 4px; background: var(--color-secondary); border-radius: var(--radius-full);
}
.sidebar__link .material-symbols-outlined { font-size: 20px; }

.topbar {
  position: sticky; top: 0;
  height: var(--topbar-height);
  margin-left: var(--sidebar-width);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-outline-variant);
  box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--space-8);
  z-index: var(--z-topbar);
}
.topbar__title { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); color: var(--color-primary); }
.topbar__actions { display: flex; align-items: center; gap: var(--space-4); }

.icon-button {
  width: 40px; height: 40px; border-radius: var(--radius-full);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-on-surface-variant);
  transition: background-color var(--transition-base);
  position: relative;
}
.icon-button:hover { background-color: var(--color-surface-container); }
.icon-button__badge {
  position: absolute; top: 4px; right: 4px;
  min-width: 16px; height: 16px; padding: 0 4px;
  background: var(--color-error); color: #fff;
  border-radius: var(--radius-full);
  font-size: 10px; font-weight: var(--font-weight-bold);
  display: inline-flex; align-items: center; justify-content: center;
}

.user-menu { position: relative; }
.user-menu__trigger {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-base);
}
.user-menu__trigger:hover { background-color: var(--color-surface-container); }
.user-menu__info { text-align: right; }
.user-menu__name { font-size: var(--font-size-base); font-weight: var(--font-weight-semibold); color: var(--color-on-surface); }
.user-menu__role { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.user-menu__avatar { width: 36px; height: 36px; border-radius: var(--radius-full); background: var(--color-primary); color: #fff; font-weight: 600; display: flex; align-items: center; justify-content: center; }
.user-menu__dropdown {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: #fff; box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  min-width: 200px; padding: var(--space-2);
  display: none; z-index: var(--z-dropdown);
}
.user-menu--open .user-menu__dropdown { display: block; }
.user-menu__dropdown a {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3); border-radius: var(--radius-md);
  color: var(--color-on-surface); font-size: var(--font-size-base);
}
.user-menu__dropdown a:hover { background: var(--color-surface-container); }

.content {
  margin-left: var(--sidebar-width);
  padding: var(--space-8);
  min-height: calc(100vh - var(--topbar-height));
}

/* ---------- 6. Page Header ---------- */
.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: var(--space-6); gap: var(--space-4); }
.page-header__titles h1 { font-size: var(--font-size-xl); font-weight: var(--font-weight-bold); color: var(--color-primary); letter-spacing: -0.02em; }
.page-header__titles p  { font-size: var(--font-size-base); color: var(--color-text-muted); margin-top: var(--space-1); }
.page-header__actions   { display: flex; gap: var(--space-3); align-items: center; }

/* ---------- 7. Cards ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.card--flush { padding: 0; overflow: hidden; }
.card--flush > .card__header,
.card--flush > .card__footer { padding: var(--space-4) var(--space-6); }
.card__header { border-bottom: 1px solid var(--color-divider); display: flex; justify-content: space-between; align-items: center; }
.card__footer { border-top: 1px solid var(--color-divider); }
.card__title  { font-size: var(--font-size-md); font-weight: var(--font-weight-semibold); color: var(--color-on-surface); }

.metric-card {
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.metric-card__label { font-size: var(--font-size-sm); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: var(--font-weight-medium); }
.metric-card__value { font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); color: var(--color-primary); letter-spacing: -0.02em; }
.metric-card__delta { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.metric-card__delta--up   { color: var(--color-success); }
.metric-card__delta--down { color: var(--color-error); }

/* ---------- 8. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  cursor: pointer; user-select: none;
  transition: filter var(--transition-base), background-color var(--transition-base), color var(--transition-base);
  white-space: nowrap;
}
.btn:disabled, .btn--disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }
.btn--primary    { background: var(--color-secondary); color: #fff; }
.btn--primary:hover { filter: brightness(0.92); }
.btn--secondary  { background: transparent; color: var(--color-secondary); border: 1px solid var(--color-secondary); }
.btn--secondary:hover { background: var(--color-info-bg); }
.btn--ghost      { background: transparent; color: var(--color-on-surface-variant); border: 1px solid var(--color-outline-variant); }
.btn--ghost:hover { background: var(--color-surface-container); }
.btn--danger     { background: var(--color-error); color: #fff; }
.btn--danger:hover { filter: brightness(0.92); }
.btn--lg { padding: var(--space-4) var(--space-6); font-size: var(--font-size-md); }
.btn--block { width: 100%; }

/* ---------- 9. Status Badges (pill style) ---------- */
.chip {
  display: inline-flex; align-items: center; gap: var(--space-1);
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm); font-weight: var(--font-weight-medium);
  line-height: 1.4;
}
.chip--neutral { background: var(--color-surface-container); color: var(--color-on-surface-variant); }
.chip--primary { background: var(--color-info-bg); color: var(--color-info); }
.chip--success { background: var(--color-success-bg); color: var(--color-success); }
.chip--warning { background: var(--color-warning-bg); color: var(--color-warning); }
.chip--error   { background: var(--color-error-bg); color: var(--color-error); }
.chip--info    { background: var(--color-info-bg); color: var(--color-info); }

/* ---------- 10. Forms ---------- */
.form-group { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-4); }
.form-label { font-size: var(--font-size-sm); font-weight: var(--font-weight-medium); color: var(--color-on-surface-variant); }
.form-control {
  height: 40px;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-on-surface);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.form-control:focus { outline: none; border-color: var(--color-secondary); box-shadow: 0 0 0 1px var(--color-secondary); }
.form-control--error { border-color: var(--color-error); }
.form-control--error:focus { box-shadow: 0 0 0 1px var(--color-error); }
.form-error { font-size: var(--font-size-sm); color: var(--color-error); }
.form-help  { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.form-hint  { font-size: var(--font-size-sm); color: var(--color-text-muted); margin-top: var(--space-1); }
.form-hint--error { color: var(--color-error); }

.password-rules {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.password-rules__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.password-rules__icon {
  font-size: 1.125rem;
  line-height: 1;
}
.password-rules__item.is-valid { color: var(--color-success); }
.password-rules__item.is-valid .password-rules__icon { font-variation-settings: 'FILL' 1; }
.password-rules__item.is-invalid { color: var(--color-error); }
.password-rules__item.is-invalid .password-rules__icon { font-variation-settings: 'FILL' 1; }
.password-match-error { margin-top: var(--space-1); }
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}
textarea.form-control { height: auto; min-height: 96px; padding: var(--space-3) var(--space-4); }
.input-wrapper { position: relative; }
.input-icon { position: absolute; right: var(--space-3); top: 50%; transform: translateY(-50%); color: var(--color-text-muted); cursor: pointer; }

.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
@media (max-width: 768px) { .form-row { grid-template-columns: 1fr; } }

/* ---------- 11. Filters bar ---------- */
.filters {
  display: flex; gap: var(--space-3); align-items: center;
  margin-bottom: var(--space-6); flex-wrap: wrap;
}
.filters__search { flex: 1; min-width: 280px; }

/* ---------- 12. Data Table ---------- */
.data-table { width: 100%; }
.data-table th, .data-table td {
  padding: var(--space-4) var(--space-6);
  text-align: left;
  font-size: var(--font-size-base);
  border-bottom: 1px solid var(--color-divider);
}
.data-table th {
  background: var(--color-surface-low);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.data-table tbody tr:hover { background: var(--color-surface-low); }
.data-table .col-actions { width: 1px; white-space: nowrap; }
.row-actions { display: inline-flex; gap: var(--space-2); }
.row-actions__btn { width: 32px; height: 32px; border-radius: var(--radius-md); display: inline-flex; align-items: center; justify-content: center; color: var(--color-on-surface-variant); transition: background var(--transition-base); }
.row-actions__btn:hover { background: var(--color-surface-container); color: var(--color-primary); }
.row-actions__btn--danger:hover { background: var(--color-error-bg); color: var(--color-error); }

/* ---------- 13. Pagination ---------- */
.pagination { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.pagination__info { display: flex; align-items: center; gap: var(--space-2); color: var(--color-text-muted); font-size: var(--font-size-sm); }
.pagination__info select { height: 32px; padding: 0 var(--space-2); border: 1px solid var(--color-outline-variant); border-radius: var(--radius-md); background: var(--color-surface); }
.pagination__list { display: flex; gap: var(--space-1); }
.pagination__btn { min-width: 32px; height: 32px; padding: 0 var(--space-2); border-radius: var(--radius-md); display: inline-flex; align-items: center; justify-content: center; color: var(--color-on-surface-variant); border: 1px solid transparent; }
.pagination__btn:hover { background: var(--color-surface-container); }
.pagination__btn--active { background: var(--color-secondary); color: #fff; border-color: var(--color-secondary); }
.pagination__btn--active:hover { background: var(--color-secondary-dark); color: #fff; }
.pagination__btn--disabled { opacity: 0.4; pointer-events: none; }

/* ---------- 14. Alerts ---------- */
[hidden] {
  display: none !important;
}
.alert {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-base);
  border: 1px solid transparent;
}
.alert--success { background: var(--color-success-bg); color: var(--color-success); border-color: rgba(22,163,74,0.2); }
.alert--error   { background: var(--color-error-bg);   color: var(--color-error);   border-color: rgba(220,38,38,0.2); }
.alert--warning { background: var(--color-warning-bg); color: var(--color-warning); border-color: rgba(217,119,6,0.2); }
.alert--info    { background: var(--color-info-bg);    color: var(--color-info);    border-color: rgba(37,99,235,0.2); }

/* ---------- 15. Auth shell ---------- */
.auth-shell { min-height: 100vh; display: flex; flex-direction: column; background: var(--color-background); }
.auth-shell main { flex: 1; display: flex; align-items: center; justify-content: center; padding: var(--space-6); }
.auth-card {
  width: 100%; max-width: 420px;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-outline-variant);
  box-shadow: var(--shadow-sm);
  padding: var(--space-10);
}
.auth-card__brand { display: flex; flex-direction: column; align-items: center; gap: var(--space-3); margin-bottom: var(--space-6); }
.auth-card__brand-icon { width: 48px; height: 48px; border-radius: var(--radius-lg); background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center; }
.auth-card__brand-title { font-size: var(--font-size-xl); font-weight: var(--font-weight-bold); color: var(--color-primary); }
.auth-card__brand-subtitle { font-size: var(--font-size-base); color: var(--color-text-muted); }
.auth-card__divider { display: flex; align-items: center; gap: var(--space-4); margin: var(--space-6) 0; }
.auth-card__divider::before, .auth-card__divider::after { content: ''; flex: 1; height: 1px; background: var(--color-outline-variant); }
.auth-card__divider span { font-size: var(--font-size-sm); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.1em; }

/* ---------- 16. Public navbar (landing) ---------- */
.public-navbar {
  position: sticky; top: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-outline-variant);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-topbar);
}
.public-navbar__inner { max-width: 1280px; margin: 0 auto; padding: 0 var(--space-6); height: var(--topbar-height); display: flex; justify-content: space-between; align-items: center; }
.public-navbar__brand { font-size: var(--font-size-xl); font-weight: var(--font-weight-bold); color: var(--color-primary); }
.public-navbar__menu { display: flex; gap: var(--space-6); align-items: center; }
.public-navbar__menu a { font-size: var(--font-size-base); color: var(--color-on-surface-variant); }
.public-navbar__menu a:hover { color: var(--color-secondary); }

.public-footer { background: var(--color-surface); border-top: 1px solid var(--color-outline-variant); padding: var(--space-6) 0; }
.public-footer__inner { max-width: 1280px; margin: 0 auto; padding: 0 var(--space-6); display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.public-footer__brand { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); color: var(--color-primary); }
.public-footer__links { display: flex; gap: var(--space-6); }
.public-footer__links a { font-size: var(--font-size-sm); color: var(--color-text-muted); }

/* ---------- 17. Responsive ---------- */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); transition: transform var(--transition-base); }
  .sidebar--open { transform: translateX(0); }
  .topbar, .content { margin-left: 0; }
}

@media (max-width: 768px) {
  .content { padding: var(--space-4); }
  .card { padding: var(--space-4); }
  .data-table th, .data-table td { padding: var(--space-3); }
}