/**
 * RubusCRM Design System V1 — SAFE FOUNDATION
 *
 * Isolation rules (enforced by scripts/test-design-system-isolation.js):
 * - Only :root tokens, .ds-* rules, DS @media / @keyframes
 * - NEVER style legacy live classes (.primary-button, .toast, …)
 * - NEVER style bare elements (input, select, button, body, html, *)
 * - Loading this file MUST produce zero visual change on existing screens
 *   until markup opt-in with .ds-* classes.
 *
 * Visual direction: 55% modern SaaS clarity / 25% enterprise density / 20% Rubusoft.
 * Quiet surfaces, subtle borders, minimal shadows, 8–12px radii, compact CRM density.
 */

/* ========================================================================
 * FOUNDATION — tokens (--ds-* namespace; does not mutate legacy vars)
 * Brand aliases read existing Rubusoft tokens where present.
 * ======================================================================== */

:root {
  /* ——— Color ——— */
  --ds-color-bg: var(--bg, #f6f8fa);
  --ds-color-surface: var(--surface, #ffffff);
  --ds-color-surface-raised: var(--surface-raised, #ffffff);
  --ds-color-surface-muted: var(--surface-muted, #eef6f3);
  --ds-color-ink: var(--ink, #24262d);
  --ds-color-muted: var(--muted, #6b7280);
  --ds-color-line: var(--line, #e8ecef);
  --ds-color-accent: var(--accent, #0f766e);
  --ds-color-accent-strong: var(--accent-strong, #0b5f59);
  --ds-color-accent-soft: var(--accent-soft, #e4f4f1);
  --ds-color-info: var(--blue, #2563eb);
  --ds-color-info-soft: var(--blue-soft, #eaf1ff);
  --ds-color-warning: var(--amber, #b45309);
  --ds-color-warning-soft: var(--amber-soft, #fff5df);
  --ds-color-danger: var(--red, #b42318);
  --ds-color-danger-soft: var(--red-soft, #fdecea);
  --ds-color-success: var(--green, #15803d);
  --ds-color-success-soft: var(--green-soft, #eaf8ef);
  --ds-color-focus-ring: color-mix(in srgb, var(--ds-color-accent) 22%, transparent);
  --ds-color-on-accent: #ffffff;
  --ds-color-on-ink: #ffffff;

  /* ——— Typography ——— */
  --ds-type-family: var(--font-sans, "DM Sans", system-ui, -apple-system, sans-serif);
  --ds-type-xs: 12px;
  --ds-type-sm: 13px;
  --ds-type-md: 14px;
  --ds-type-lg: 16px;
  --ds-type-xl: 18px;
  --ds-type-page: 24px;
  --ds-type-lh-xs: 16px;
  --ds-type-lh-sm: 18px;
  --ds-type-lh-md: 20px;
  --ds-type-lh-lg: 24px;
  --ds-type-lh-xl: 26px;
  --ds-type-lh-page: 30px;
  --ds-type-regular: 400;
  --ds-type-medium: 500;
  --ds-type-semibold: 600;
  --ds-type-bold: 700;

  /* ——— Spacing (explicit 4px grid; independent of legacy --space-1=8px) ——— */
  --ds-space-0: 0;
  --ds-space-1: 4px;
  --ds-space-2: 8px;
  --ds-space-3: 12px;
  --ds-space-4: 16px;
  --ds-space-5: 20px;
  --ds-space-6: 24px;
  --ds-space-7: 32px;
  --ds-space-8: 40px;
  --ds-space-9: 48px;
  --ds-space-10: 64px;
  --ds-control-pad-x: 12px;
  --ds-control-height: 36px;
  --ds-control-height-sm: 32px;
  --ds-touch-min: 44px;

  /* ——— Radius (8–12px normal; avoid oversized cards) ——— */
  --ds-radius-sm: 6px;
  --ds-radius-md: 8px;
  --ds-radius-lg: 10px;
  --ds-radius-xl: 12px;
  --ds-radius-pill: 999px;

  /* ——— Shadow (minimal; prefer borders) ——— */
  --ds-shadow-xs: 0 1px 2px rgba(36, 38, 45, 0.05);
  --ds-shadow-sm: 0 1px 2px rgba(36, 38, 45, 0.05), 0 2px 8px rgba(36, 38, 45, 0.04);
  --ds-shadow-md: 0 2px 4px rgba(36, 38, 45, 0.06), 0 8px 20px rgba(36, 38, 45, 0.06);
  --ds-shadow-lg: 0 8px 24px rgba(36, 38, 45, 0.12);
  --ds-shadow-overlay: 0 16px 48px rgba(36, 38, 45, 0.18);

  /* ——— Motion ——— */
  --ds-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ds-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ds-motion-fast: 120ms;
  --ds-motion-base: 180ms;
  --ds-motion-slow: 280ms;

  /* ——— Breakpoints (semantic; documented widths) ———
   * phone:           360–429
   * large-phone:     430–767
   * tablet:          768–1023
   * desktop:         1024–1439
   * wide-desktop:    1440+
   * Reference widths: 360, 390, 430, 768, 1024, 1280, 1440, 1920
   */
  --ds-bp-phone: 360px;
  --ds-bp-large-phone: 430px;
  --ds-bp-tablet: 768px;
  --ds-bp-desktop: 1024px;
  --ds-bp-wide: 1440px;
  --ds-bp-ultrawide: 1920px;

  /* ——— Z-index ——— */
  --ds-z-base: 1;
  --ds-z-sticky: 20;
  --ds-z-dropdown: 40;
  --ds-z-sidebar: 50;
  --ds-z-drawer: 60;
  --ds-z-modal: 80;
  --ds-z-toast: 100;
  --ds-z-login: 1200;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --ds-motion-fast: 0ms;
    --ds-motion-base: 0ms;
    --ds-motion-slow: 0ms;
  }
}

/* ========================================================================
 * COMPONENTS — .ds-* only (opt-in; unused by current product HTML)
 * ======================================================================== */

.ds-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ds-space-2);
  min-height: var(--ds-control-height);
  padding: 0 var(--ds-control-pad-x);
  border: 1px solid transparent;
  border-radius: var(--ds-radius-md);
  background: var(--ds-color-accent);
  color: var(--ds-color-on-accent);
  font-family: var(--ds-type-family);
  font-size: var(--ds-type-md);
  font-weight: var(--ds-type-semibold);
  line-height: var(--ds-type-lh-sm);
  white-space: nowrap;
  cursor: pointer;
  box-shadow: none;
  transition:
    background var(--ds-motion-fast) var(--ds-ease-out),
    border-color var(--ds-motion-fast) var(--ds-ease-out),
    color var(--ds-motion-fast) var(--ds-ease-out),
    box-shadow var(--ds-motion-fast) var(--ds-ease-out);
}

.ds-button:hover:not(:disabled):not([aria-disabled="true"]) {
  background: var(--ds-color-accent-strong);
}

.ds-button:active:not(:disabled):not([aria-disabled="true"]) {
  background: var(--ds-color-accent-strong);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.12);
}

.ds-button:focus-visible {
  outline: 2px solid var(--ds-color-accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px var(--ds-color-focus-ring);
}

.ds-button[disabled],
.ds-button[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

.ds-button--ghost {
  background: var(--ds-color-surface);
  border-color: var(--ds-color-line);
  color: var(--ds-color-ink);
}

.ds-button--ghost:hover:not(:disabled):not([aria-disabled="true"]) {
  background: var(--ds-color-surface-muted);
  border-color: color-mix(in srgb, var(--ds-color-accent) 28%, var(--ds-color-line));
}

.ds-button--danger {
  background: var(--ds-color-danger);
  color: var(--ds-color-on-ink);
}

.ds-button.is-loading {
  pointer-events: none;
  opacity: 0.72;
}

.ds-icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--ds-control-height);
  min-width: var(--ds-control-height);
  min-height: var(--ds-control-height);
  padding: 0;
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-md);
  background: var(--ds-color-surface);
  color: var(--ds-color-ink);
  cursor: pointer;
  transition:
    background var(--ds-motion-fast) var(--ds-ease-out),
    border-color var(--ds-motion-fast) var(--ds-ease-out);
}

.ds-icon-button:hover:not(:disabled) {
  background: var(--ds-color-surface-muted);
}

.ds-icon-button:focus-visible {
  outline: 2px solid var(--ds-color-accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px var(--ds-color-focus-ring);
}

.ds-icon-button[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

.ds-input,
.ds-select,
.ds-textarea {
  display: block;
  width: 100%;
  min-height: var(--ds-control-height);
  padding: 0 var(--ds-control-pad-x);
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-md);
  background: var(--ds-color-surface);
  color: var(--ds-color-ink);
  font-family: var(--ds-type-family);
  font-size: var(--ds-type-md);
  line-height: var(--ds-type-lh-md);
  transition:
    border-color var(--ds-motion-fast) var(--ds-ease-out),
    box-shadow var(--ds-motion-fast) var(--ds-ease-out);
}

.ds-textarea {
  min-height: 88px;
  padding: var(--ds-space-2) var(--ds-control-pad-x);
  resize: vertical;
}

.ds-input:hover:not(:disabled),
.ds-select:hover:not(:disabled),
.ds-textarea:hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--ds-color-accent) 28%, var(--ds-color-line));
}

.ds-input:focus-visible,
.ds-select:focus-visible,
.ds-textarea:focus-visible {
  outline: 2px solid var(--ds-color-accent);
  outline-offset: 1px;
  border-color: var(--ds-color-accent);
  box-shadow: 0 0 0 3px var(--ds-color-focus-ring);
}

.ds-input[disabled],
.ds-select[disabled],
.ds-textarea[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--ds-color-surface-muted);
}

.ds-input[aria-invalid="true"],
.ds-select[aria-invalid="true"],
.ds-textarea[aria-invalid="true"] {
  border-color: var(--ds-color-danger);
}

.ds-input[aria-invalid="true"]:focus-visible,
.ds-select[aria-invalid="true"]:focus-visible,
.ds-textarea[aria-invalid="true"]:focus-visible {
  outline-color: var(--ds-color-danger);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ds-color-danger) 18%, transparent);
}

.ds-field-error {
  margin: var(--ds-space-1) 0 0;
  color: var(--ds-color-danger);
  font-size: var(--ds-type-xs);
  line-height: var(--ds-type-lh-xs);
  font-weight: var(--ds-type-medium);
}

.ds-field-help {
  margin: var(--ds-space-1) 0 0;
  color: var(--ds-color-muted);
  font-size: var(--ds-type-xs);
  line-height: var(--ds-type-lh-xs);
}

.ds-search {
  display: flex;
  align-items: center;
  gap: var(--ds-space-2);
  min-height: var(--ds-control-height);
  padding: 0 var(--ds-control-pad-x);
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-md);
  background: var(--ds-color-surface);
}

.ds-search:focus-within {
  border-color: var(--ds-color-accent);
  box-shadow: 0 0 0 3px var(--ds-color-focus-ring);
  outline: 2px solid transparent;
}

.ds-search .ds-input {
  border: 0;
  min-height: calc(var(--ds-control-height) - 2px);
  padding-inline: 0;
  box-shadow: none;
}

.ds-search .ds-input:focus-visible {
  outline: none;
  box-shadow: none;
}

.ds-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 22px;
  padding: 0 var(--ds-space-2);
  border-radius: var(--ds-radius-pill);
  background: var(--ds-color-accent-soft);
  color: var(--ds-color-accent-strong);
  font-size: var(--ds-type-xs);
  line-height: var(--ds-type-lh-xs);
  font-weight: var(--ds-type-semibold);
}

.ds-status {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-1);
  min-height: 22px;
  padding: 0 var(--ds-space-2);
  border-radius: var(--ds-radius-pill);
  font-size: var(--ds-type-xs);
  font-weight: var(--ds-type-semibold);
  background: var(--ds-color-surface-muted);
  color: var(--ds-color-muted);
}

.ds-status--success {
  background: var(--ds-color-success-soft);
  color: var(--ds-color-success);
}

.ds-status--warning {
  background: var(--ds-color-warning-soft);
  color: var(--ds-color-warning);
}

.ds-status--danger {
  background: var(--ds-color-danger-soft);
  color: var(--ds-color-danger);
}

.ds-status--info {
  background: var(--ds-color-info-soft);
  color: var(--ds-color-info);
}

.ds-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ds-space-1);
}

.ds-tabs__tab {
  min-height: var(--ds-control-height-sm);
  padding: 0 var(--ds-space-3);
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: var(--ds-radius-sm) var(--ds-radius-sm) 0 0;
  background: transparent;
  color: var(--ds-color-muted);
  font-family: var(--ds-type-family);
  font-size: var(--ds-type-md);
  font-weight: var(--ds-type-medium);
  cursor: pointer;
}

.ds-tabs__tab:hover:not([aria-selected="true"]) {
  color: var(--ds-color-ink);
}

.ds-tabs__tab[aria-selected="true"] {
  color: var(--ds-color-accent-strong);
  border-bottom-color: var(--ds-color-accent);
  font-weight: var(--ds-type-semibold);
}

.ds-tabs__tab:focus-visible {
  outline: 2px solid var(--ds-color-accent);
  outline-offset: 2px;
}

.ds-menu,
.ds-dropdown {
  z-index: var(--ds-z-dropdown);
  min-width: 160px;
  padding: var(--ds-space-1);
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-color-surface);
  box-shadow: var(--ds-shadow-md);
}

.ds-tooltip {
  z-index: var(--ds-z-dropdown);
  max-width: 240px;
  padding: var(--ds-space-1) var(--ds-space-2);
  border-radius: var(--ds-radius-sm);
  background: var(--ds-color-ink);
  color: var(--ds-color-on-ink);
  font-size: var(--ds-type-xs);
  line-height: var(--ds-type-lh-xs);
}

.ds-modal {
  z-index: var(--ds-z-modal);
  width: min(560px, calc(100vw - 32px));
  max-height: min(90vh, 840px);
  margin: auto;
  padding: 0;
  overflow: auto;
  border: 0;
  border-radius: var(--ds-radius-xl);
  background: var(--ds-color-surface);
  color: var(--ds-color-ink);
  box-shadow: var(--ds-shadow-overlay);
}

.ds-modal::backdrop {
  background: rgba(36, 38, 45, 0.34);
}

.ds-modal__body {
  padding: var(--ds-space-6);
}

.ds-modal--fullscreen-mobile {
  /* desktop default unchanged; mobile media expands below */
}

.ds-drawer {
  z-index: var(--ds-z-drawer);
  position: fixed;
  top: 0;
  right: 0;
  width: min(420px, 100vw);
  height: 100%;
  overflow: auto;
  background: var(--ds-color-surface);
  border-left: 1px solid var(--ds-color-line);
  box-shadow: var(--ds-shadow-lg);
  padding: var(--ds-space-4);
  padding-bottom: calc(var(--ds-space-4) + env(safe-area-inset-bottom, 0px));
}

.ds-toast {
  z-index: var(--ds-z-toast);
  position: fixed;
  right: var(--ds-space-5);
  bottom: calc(var(--ds-space-5) + env(safe-area-inset-bottom, 0px));
  min-width: 220px;
  max-width: min(400px, calc(100vw - 32px));
  padding: var(--ds-space-3) var(--ds-space-4);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-color-ink);
  color: var(--ds-color-on-ink);
  font-size: var(--ds-type-sm);
  line-height: var(--ds-type-lh-sm);
  font-weight: var(--ds-type-medium);
  box-shadow: var(--ds-shadow-md);
}

.ds-card {
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-xl);
  background: var(--ds-color-surface);
  box-shadow: var(--ds-shadow-xs);
  padding: var(--ds-space-4);
}

.ds-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.ds-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--ds-type-md);
  line-height: var(--ds-type-lh-md);
}

.ds-table th,
.ds-table td {
  padding: var(--ds-space-2) var(--ds-space-3);
  border-bottom: 1px solid var(--ds-color-line);
  text-align: left;
  vertical-align: middle;
}

.ds-table th {
  color: var(--ds-color-muted);
  font-size: var(--ds-type-xs);
  font-weight: var(--ds-type-semibold);
}

.ds-mobile-list {
  display: flex;
  flex-direction: column;
  gap: var(--ds-space-2);
}

.ds-mobile-list__item {
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-color-surface);
  padding: var(--ds-space-3);
}

.ds-empty {
  display: grid;
  place-items: center;
  min-height: 120px;
  padding: var(--ds-space-5);
  border: 1px dashed var(--ds-color-line);
  border-radius: var(--ds-radius-lg);
  color: var(--ds-color-muted);
  text-align: center;
  font-size: var(--ds-type-sm);
}

.ds-skeleton {
  display: block;
  min-height: 12px;
  border-radius: var(--ds-radius-sm);
  background: linear-gradient(
    90deg,
    var(--ds-color-surface-muted) 0%,
    color-mix(in srgb, var(--ds-color-surface) 70%, var(--ds-color-line)) 50%,
    var(--ds-color-surface-muted) 100%
  );
  background-size: 200% 100%;
  animation: ds-skeleton-shine var(--ds-motion-slow) ease-in-out infinite;
}

@keyframes ds-skeleton-shine {
  from { background-position: 100% 0; }
  to { background-position: -100% 0; }
}

.ds-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--ds-space-2);
}

/* ========================================================================
 * APPLICATION PATTERNS — .ds-* only
 * ======================================================================== */

.ds-page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--ds-space-4);
  min-width: 0;
}

.ds-page-header__title {
  margin: 0;
  font-size: var(--ds-type-page);
  line-height: var(--ds-type-lh-page);
  font-weight: var(--ds-type-bold);
  letter-spacing: -0.02em;
  color: var(--ds-color-ink);
}

.ds-toolbar,
.ds-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ds-space-2);
  min-width: 0;
}

.ds-master-detail {
  display: grid;
  grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
  gap: 0;
  min-width: 0;
  min-height: 0;
}

.ds-master-detail__list,
.ds-master-detail__detail {
  min-width: 0;
  min-height: 0;
  overflow: auto;
}

.ds-form {
  display: grid;
  gap: var(--ds-space-4);
  min-width: 0;
}

.ds-form__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--ds-space-4);
  min-width: 0;
}

.ds-settings-section {
  border: 1px solid var(--ds-color-line);
  border-radius: var(--ds-radius-xl);
  background: var(--ds-color-surface);
  padding: var(--ds-space-4) var(--ds-space-6);
}

.ds-inbox {
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.ds-kanban {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 1fr);
  gap: var(--ds-space-3);
  align-items: start;
  overflow-x: auto;
  min-width: 0;
  -webkit-overflow-scrolling: touch;
}

.ds-action-sheet {
  border-radius: var(--ds-radius-xl) var(--ds-radius-xl) 0 0;
  background: var(--ds-color-surface);
  box-shadow: var(--ds-shadow-overlay);
  padding: var(--ds-space-4);
  padding-bottom: calc(var(--ds-space-4) + env(safe-area-inset-bottom, 0px));
}

/* Desktop: prefer table; hide mobile list unless forced */
.ds-table-desktop {
  display: block;
}

.ds-mobile-list-only {
  display: none;
}

/* ========================================================================
 * RESPONSIVE — DS components only (mobile-first)
 * ======================================================================== */

@media (max-width: 767px) {
  .ds-button,
  .ds-icon-button {
    min-height: var(--ds-touch-min);
  }

  .ds-icon-button {
    width: var(--ds-touch-min);
    min-width: var(--ds-touch-min);
  }

  .ds-master-detail {
    grid-template-columns: 1fr;
  }

  .ds-form__row {
    grid-template-columns: 1fr;
  }

  .ds-page-header {
    gap: var(--ds-space-3);
  }

  .ds-modal.ds-modal--fullscreen-mobile,
  .ds-modal--fullscreen-mobile {
    width: 100vw;
    max-width: 100vw;
    height: 100dvh;
    max-height: 100dvh;
    margin: 0;
    border-radius: 0;
  }

  .ds-drawer {
    width: 100vw;
  }

  .ds-table-desktop {
    display: none;
  }

  .ds-mobile-list-only {
    display: flex;
  }

  .ds-toast {
    left: var(--ds-space-3);
    right: var(--ds-space-3);
    bottom: calc(var(--ds-space-3) + env(safe-area-inset-bottom, 0px));
    max-width: none;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .ds-master-detail {
    grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  }
}

@media (min-width: 1440px) {
  .ds-page-header__title {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ds-button,
  .ds-icon-button,
  .ds-input,
  .ds-select,
  .ds-textarea {
    transition: none;
  }

  .ds-skeleton {
    animation: none;
  }
}