/* ===================================================================
   Contacts — Dark theme, purple accent.
   A true dark UI: near-black page, elevated dark-purple surfaces for
   the panel/cards, one unified violet accent for primary actions and
   selection, a dedicated red kept separate for delete (a destructive
   action earns its own unambiguous signal regardless of brand accent).
   Keeps the book-ledger structure (thumb-index rail, sticky letter
   headers, folded corner) — only the color system changed. Vanilla
   CSS/JS; one Google Fonts <link> for Bricolage Grotesque + Karla, no
   other external dependencies.
=================================================================== */

:root {
  /* Surfaces — darkest to lightest: bg < surface-deep (recessed) < surface (elevated) */
  --bg: #131017;
  --surface: #1e1926;
  --surface-deep: #191420;
  --surface-line: #332b44;
  --spine: #120d18; /* the rail — the book's binding, distinct from its pages */

  /* Text (light-on-dark throughout — no dual light/dark surface split needed) */
  --ink: #ede9f4;
  --ink-soft: #b3a9c2;
  /* Crisp white specifically for text on saturated accent fills — the
     slightly warm --ink reads as washed-out gray against vivid purple. */
  --ink-on-accent: #ffffff;

  /* Accent: one purple family for primary actions + selection/focus */
  --purple: #ad82de; /* text/foreground use on dark surfaces */
  --purple-solid: #6b3fc7; /* solid fills, paired with --ink text */
  --purple-solid-deep: #4f2e9c; /* hover-darken from purple-solid */

  /* Danger stays its own red — destructive actions get an unambiguous
     signal independent of the brand accent. */
  --danger: #b8334a; /* solid fills, paired with --ink text */
  --danger-deep: #8a2438; /* hover-darken from danger */
  --danger-bright: #e15a6f; /* text/border use on dark surfaces */

  /* Success is a semantic color, not the accent — kept separate. */
  --success-deep: #1f4a2c;

  --radius-pill: 999px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --shadow-rest: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 28px -10px rgba(0, 0, 0, 0.65);
  --shadow-lift: 0 12px 22px -10px rgba(0, 0, 0, 0.55);
  --shadow-elevate: 0 30px 56px -16px rgba(0, 0, 0, 0.7);

  --font-display: "Bricolage Grotesque", -apple-system, "Segoe UI", sans-serif;
  --font-body: "Karla", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scrollbar-color: var(--surface-line) var(--bg);
}

::selection {
  background: var(--purple-solid);
  color: var(--ink);
}

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--surface-line);
  border-radius: var(--radius-pill);
  border: 3px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--purple-solid);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100vh;
}

/* ---------- Top header ---------- */
.directory-header {
  background: var(--bg);
  box-shadow: 0 1px 0 var(--surface-line), var(--shadow-rest);
  padding: 16px 24px;
}

.directory-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand__mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--ink);
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
}

.brand__mark::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--purple);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-actions .toolbar__meta {
  color: var(--ink-soft);
}

/* ---------- Buttons: soft fills, shadow-based lift, no thick outlines ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  border: 2px solid var(--surface-line);
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  box-shadow: var(--shadow-rest);
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease,
    transform 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}

.btn:hover,
.btn:focus-visible {
  background: var(--surface-deep);
  border-color: var(--purple-solid);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.btn:active {
  transform: translateY(0) scale(0.97);
  box-shadow: var(--shadow-rest);
}

.btn--primary {
  background: var(--purple-solid);
  border-color: var(--purple-solid);
  color: var(--ink-on-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--purple-solid-deep);
  border-color: var(--purple-solid-deep);
  color: var(--ink-on-accent);
}

.btn--danger {
  background: var(--danger);
  border-color: var(--danger);
  color: var(--ink-on-accent);
}

.btn--danger:hover,
.btn--danger:focus-visible {
  background: var(--danger-deep);
  border-color: var(--danger-deep);
  color: var(--ink-on-accent);
}

.btn--small {
  padding: 6px 14px;
  font-size: 0.72rem;
  border: none;
  background: var(--surface-deep);
  color: var(--ink);
  box-shadow: none;
}

.btn--small:hover,
.btn--small:focus-visible {
  background: var(--purple-solid);
  color: var(--ink-on-accent);
  box-shadow: none;
}

.btn--ghost {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
  box-shadow: none;
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(237, 233, 244, 0.1);
  color: var(--ink);
  box-shadow: none;
}

.btn--icon {
  width: 30px;
  height: 30px;
  padding: 0;
  border: none;
  border-radius: 50%;
  flex-shrink: 0;
}

.btn--icon svg {
  width: 15px;
  height: 15px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  pointer-events: none;
}

/* ---------- Page shell ---------- */
.directory-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

/* ---------- The directory shell: one unified panel + a book-style
   thumb-index rail, instead of a stack of separate floating cards. ---------- */
.directory-shell {
  display: grid;
  grid-template-columns: 1fr 36px;
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-lg);
  position: relative;
}

.directory-panel {
  background: var(--surface);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  min-width: 0;
  padding-bottom: 8px;
}

/* A small folded page-corner — the one signature physical detail. */
.directory-shell::after {
  content: "";
  position: absolute;
  right: 36px;
  bottom: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 22px 22px;
  border-color: transparent transparent var(--surface-deep) transparent;
  filter: drop-shadow(-1px -1px 3px rgba(0, 0, 0, 0.5));
}

/* ---------- Search / toolbar strip (top of the panel) ---------- */
.panel-toolbar {
  background: var(--surface);
  border-radius: var(--radius-lg) 0 0 0;
  padding: 18px 20px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--surface-line);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 320px;
  min-width: 220px;
  background: var(--surface-deep);
  border-radius: var(--radius-pill);
  padding: 0 16px;
  transition: box-shadow 150ms ease;
}

.search-box:focus-within {
  box-shadow: 0 0 0 3px rgba(107, 63, 199, 0.35);
}

.search-box__icon {
  display: flex;
  align-items: center;
  color: var(--ink-soft);
  flex-shrink: 0;
}

.search-box__icon svg {
  width: 18px;
  height: 18px;
}

.search-box input[type="search"] {
  flex: 1;
  border: none;
  background: transparent;
  padding: 11px 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
}

.search-box input[type="search"]::placeholder {
  color: var(--ink-soft);
}

.search-box input[type="search"]:focus {
  outline: none;
}

.toolbar__meta {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  white-space: nowrap;
}

/* ---------- Alphabet rail: the book's binding, with a real thumb-index
   tab strip — jump to a letter without scrolling. ---------- */
.alpha-rail {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1px;
  padding: 10px 3px;
  background: var(--spine);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.alpha-rail button {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.62rem;
  line-height: 1;
  padding: 3.5px 0;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, transform 100ms var(--ease-out);
}

.alpha-rail button:hover:not(:disabled) {
  background: rgba(173, 130, 222, 0.22);
  color: var(--ink);
}

.alpha-rail button:active:not(:disabled) {
  transform: scale(0.88);
}

.alpha-rail button[disabled] {
  opacity: 0.35;
  cursor: default;
}

.alpha-rail button.is-active {
  background: var(--purple-solid);
  color: var(--ink-on-accent);
  border-radius: 999px 0 0 999px;
  transform: translateX(-7px);
  box-shadow: -3px 2px 8px rgba(0, 0, 0, 0.5);
  animation: tab-pop 240ms var(--ease-out);
}

#alphaIndex button:first-child {
  font-size: 0.56rem;
  letter-spacing: 0.03em;
  padding-bottom: 6px;
  margin-bottom: 3px;
  border-bottom: 1px solid rgba(179, 169, 194, 0.2);
}

/* Ends at .alpha-rail button.is-active's resting transform (translateX(-7px)
   scale(1)) so the animation hands off to the static state with no snap. */
@keyframes tab-pop {
  0% {
    transform: translateX(0) scale(1);
  }
  50% {
    transform: translateX(-10px) scale(1.15);
  }
  100% {
    transform: translateX(-7px) scale(1);
  }
}

/* ---------- Listing groups: sticky letter headers inside the one panel,
   like flipping through an address book — not a repeated card shape. ---------- */
#listingsContainer {
  padding: 4px 20px 4px;
}

.listing-group {
  animation: group-in 340ms var(--ease-out) both;
  animation-delay: calc(var(--gi, 0) * 55ms);
}

@keyframes group-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.listing-group__letter {
  position: sticky;
  top: 0;
  background: var(--surface);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--purple);
  padding: 14px 0 8px;
  border-bottom: 2px solid var(--purple-solid);
  margin-bottom: 4px;
  box-shadow: 0 6px 12px -8px rgba(0, 0, 0, 0.6);
  z-index: 2;
}

.listing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 24px;
}

@media (max-width: 720px) {
  .listing-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Single listing entry ---------- */
.listing {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 6px;
  padding: 12px 10px;
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--surface-line);
  transition: background-color 150ms ease, opacity 200ms ease, transform 200ms var(--ease-out);
}

/* Delete's exit: the row visibly leaves before it's gone, instead of
   just vanishing on the next render. Transform/opacity only — no
   layout-property animation (max-height, padding) to avoid reflow cost. */
.listing.is-removing {
  opacity: 0;
  transform: scale(0.95) translateX(6px);
  pointer-events: none;
}

/* Post-mutation re-renders (add/edit/delete) skip the entrance stagger —
   only a genuinely new result set (load, search, filter) earns it. */
.listing-group.no-entrance {
  animation: none;
  opacity: 1;
  transform: none;
}

.listing-grid > .listing:last-child {
  border-bottom: none;
}

.listing:hover,
.listing:focus-within {
  background: var(--surface-deep);
}

.listing__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}

.listing__name .listing__email {
  display: block;
  font-family: var(--font-body);
  font-weight: normal;
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-top: 2px;
}

.listing__phone {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--purple);
  white-space: nowrap;
  font-size: 0.88rem;
}

.listing__actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.listing__created {
  grid-column: 1 / -1;
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--ink-soft);
}

/* ---------- Skeleton loading ---------- */
.skeleton-group {
  padding: 14px 0;
}

.skeleton-line {
  height: 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--surface-deep) 25%, var(--surface-line) 37%, var(--surface-deep) 63%);
  background-size: 400% 100%;
  animation: skeleton-shimmer 1.4s ease infinite;
}

.skeleton-line--title {
  width: 70px;
  height: 20px;
}

.skeleton-line--name {
  width: 60%;
}

.skeleton-line--detail {
  width: 40%;
  height: 10px;
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: 0 0;
  }
}

/* ---------- Empty / loading states ---------- */
.state-panel {
  text-align: center;
  padding: 48px 20px;
  color: var(--ink-soft);
}

.state-panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 6px;
}

/* ---------- Modal (Add / Edit, Delete confirm) ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  overflow-y: auto;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms ease, visibility 0s linear 200ms;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 200ms ease;
}

.ad-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevate);
  width: 100%;
  max-width: 440px;
  padding: 0;
  overflow: hidden;
}

/* The enter-transform belongs to the modal context, not the card itself,
   so the same card can be reused as a static page element (see .auth-card). */
.modal-overlay .ad-card {
  transform: translateY(14px) scale(0.97);
  transition: transform 220ms var(--ease-out);
}

.modal-overlay.is-open .ad-card {
  transform: translateY(0) scale(1);
}

.ad-card__header {
  background: var(--surface);
  color: var(--ink);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  border-bottom: 1px solid var(--surface-line);
}

.ad-card__close {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: color 150ms ease, transform 150ms ease;
}

.ad-card__close:hover {
  color: var(--danger-bright);
  transform: rotate(90deg);
}

.ad-card__body {
  padding: 22px;
}

.field {
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

.field input {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1.5px solid var(--surface-line);
  border-radius: var(--radius-sm);
  background: var(--surface-deep);
  color: var(--ink);
  transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}

.field input:focus {
  outline: none;
  border-color: var(--purple-solid);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(107, 63, 199, 0.3);
}

.field--error input {
  border-color: var(--danger-bright);
}

.field--error input:focus {
  box-shadow: 0 0 0 3px rgba(225, 90, 111, 0.25);
}

.field__error {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--danger-bright);
  min-height: 1em;
}

/* Live password checklist: each rule fills in as it is satisfied. */
.password-rules {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.password-rules li {
  position: relative;
  padding-left: 24px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--ink-soft);
  transition: color 150ms ease;
}

.password-rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border: 1.5px solid var(--ink-soft);
  border-radius: 50%;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.password-rules li::after {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 3.5px;
  width: 4px;
  height: 7px;
  border: solid var(--ink-on-accent);
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg) scale(0);
  transition: transform 150ms var(--ease-out);
}

.password-rules li.is-met {
  color: var(--ink);
}

.password-rules li.is-met::before {
  background: var(--purple-solid);
  border-color: var(--purple-solid);
}

.password-rules li.is-met::after {
  transform: rotate(45deg) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .password-rules li,
  .password-rules li::before,
  .password-rules li::after {
    transition: none;
  }
}

.ad-card__footer {
  padding: 14px 22px 22px;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ---------- Auth page (login / register) ---------- */
.auth-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 20px 80px;
  display: flex;
  justify-content: center;
}

.auth-shell {
  width: 100%;
  max-width: 420px;
}

.auth-shell .banner {
  margin-bottom: 20px;
}

.auth-card {
  width: 100%;
  animation: group-in 360ms var(--ease-out) both;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 20px;
  background: var(--surface-deep);
  border-radius: var(--radius-pill);
}

.auth-tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 10px 0;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}

.auth-tab:hover {
  background: rgba(237, 233, 244, 0.08);
}

.auth-tab.is-active {
  background: var(--purple-solid);
  color: var(--ink-on-accent);
}

#loginForm,
#registerForm {
  animation: group-in 260ms var(--ease-out) both;
}

.auth-submit {
  width: 100%;
  margin-top: 6px;
}

/* ---------- Delete confirm dialog ---------- */
.confirm-card {
  max-width: 380px;
  text-align: left;
}

.confirm-card__body {
  padding: 22px;
  font-family: var(--font-body);
  font-size: 1rem;
}

.confirm-card__body strong {
  font-family: var(--font-display);
  font-weight: 700;
}

/* ---------- Toast / inline banner (intentionally light — a toast should
   pop against a dark page, not blend into another dark surface) ---------- */
.banner {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  animation: banner-in 220ms var(--ease-out) both;
}

@keyframes banner-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner--error {
  background: #f8e1e5;
  color: #7a1f30;
}

.banner--success {
  background: #e2f0e6;
  color: var(--success-deep);
}

.banner[hidden] {
  display: none;
}

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  .listing-group,
  .banner,
  .auth-card,
  #loginForm,
  #registerForm {
    animation: none;
    opacity: 1;
    transform: none;
  }
  /* The rail's protruded position is a state indicator, not decoration —
     keep the static transform, just drop the bounce that gets there. */
  .alpha-rail button.is-active {
    animation: none;
  }
  .skeleton-line {
    animation: skeleton-pulse 1.4s ease-in-out infinite;
    background: var(--surface-line);
  }
  .ad-card {
    transition: opacity 150ms linear;
    transform: none;
  }
  .modal-overlay {
    transition: opacity 150ms linear, visibility 0s linear 150ms;
  }
  .modal-overlay.is-open {
    transition: opacity 150ms linear;
  }
  .btn,
  .alpha-rail button,
  .ad-card__close {
    transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
  }
  .btn:hover {
    transform: none;
    box-shadow: none;
  }
  .alpha-rail button:hover:not(.is-active) {
    transform: none;
  }
  .btn:active,
  .alpha-rail button:active:not(.is-active) {
    transform: none;
  }
  .listing {
    transition: background-color 150ms ease, opacity 150ms linear;
  }
  .listing.is-removing {
    transform: none;
  }
}

@keyframes skeleton-pulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

@media (max-width: 480px) {
  .brand__mark {
    font-size: 1.3rem;
  }
  .directory-header__inner {
    align-items: flex-start;
  }
  .header-actions {
    padding-top: 4px;
  }
  .panel-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box {
    flex: none;
  }
  .directory-shell {
    grid-template-columns: 1fr 30px;
  }
  .directory-shell::after {
    right: 30px;
  }
  .listing {
    grid-template-columns: 1fr;
  }
  .listing__phone {
    justify-self: start;
  }
}