/* ---------------------------------------------------------------
   General Delivery: a post-office read on a team task inbox.
   Chrome: deep postal navy. Cards: cream paper. Ink: navy/red/blue.
   --------------------------------------------------------------- */

@font-face {
  font-family: "Oswald";
  src: url("assets/oswald.ttf") format("truetype");
  font-weight: 200 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/ibm-plex-mono.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --navy-0: #0f1726;
  --navy-1: #16233a;
  --navy-2: #1e304c;
  --navy-line: #33456a;
  --cream-text: #eee7d6;
  --cream-muted: #a9b3c9;

  --paper: #f3edda;
  --paper-2: #ece3c9;
  --paper-line: #cdbf99;
  --ink: #1c2436;
  --ink-muted: #5b5644;

  --red: #a9282b;
  --blue: #2c4d80;
  --green: #3c6b46;
  --amber: #8f5c12;

  --focus: #f2b632;

  --radius-card: 12px;
  --radius-input: 8px;
  --radius-pill: 999px;

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--navy-0);
  background-image:
    radial-gradient(circle at 15% 0%, var(--navy-2) 0%, transparent 55%),
    radial-gradient(circle at 85% 10%, var(--navy-2) 0%, transparent 45%);
  color: var(--cream-text);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  margin: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--focus);
  color: var(--ink);
  padding: 0.6em 1em;
  border-radius: 0 0 var(--radius-input) 0;
  z-index: 50;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

button, input, select {
  font: inherit;
  color: inherit;
}

/* ---------------- Header / sorting desk ---------------- */

.depot-header {
  border-bottom: 1px solid var(--navy-line);
  padding: 1.5rem 1.5rem 0;
}

.depot-header__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem 2rem;
  padding-bottom: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand__mark {
  color: var(--cream-text);
  flex-shrink: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--cream-text);
}

.brand__tagline {
  margin: 0.15rem 0 0;
  font-size: 0.8rem;
  color: var(--cream-muted);
  letter-spacing: 0.02em;
}

.sorting-desk {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cream-muted);
}

.field input,
.field select {
  background: var(--navy-1);
  border: 1px solid var(--navy-line);
  color: var(--cream-text);
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-input);
  min-width: 220px;
}

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

.field input:focus-visible,
.field select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 1px;
}

/* Tray shelf: quick-filter stat tiles */

.tray-shelf {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  padding-bottom: 1.25rem;
}

.tray-tile {
  background: var(--navy-1);
  border: 1px solid var(--navy-line);
  border-radius: var(--radius-input);
  padding: 0.6rem 0.75rem;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
  color: var(--cream-text);
}

.tray-tile:hover {
  background: var(--navy-2);
}

.tray-tile:active {
  transform: translateY(1px) scale(0.98);
}

.tray-tile[aria-pressed="true"] {
  border-color: var(--focus);
  background: var(--navy-2);
}

.tray-tile__count {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
}

.tray-tile__label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cream-muted);
  margin-top: 0.1rem;
}

/* ---------------- Main / envelope grid ---------------- */

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
}

.result-count {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--cream-muted);
}

.envelope-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.envelope {
  margin: 0;
}

.envelope__btn {
  width: 100%;
  height: 100%;
  text-align: left;
  background: var(--paper);
  background-image:
    radial-gradient(circle at 10% 15%, rgba(28, 36, 54, 0.035) 0, transparent 40%),
    radial-gradient(circle at 90% 85%, rgba(28, 36, 54, 0.035) 0, transparent 40%);
  color: var(--ink);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-card);
  padding: 1.1rem 1.1rem 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  box-shadow: 0 1px 0 rgba(15, 23, 38, 0.4);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.envelope__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(8, 12, 22, 0.35);
}

.envelope__btn:active {
  transform: translateY(0) scale(0.99);
}

.envelope__meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.postmark {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 3.1rem;
  height: 3.1rem;
  border-radius: 50%;
  border: 2px solid var(--blue);
  outline: 1px solid var(--blue);
  outline-offset: 2px;
  color: var(--blue);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
  line-height: 1.15;
  flex-shrink: 0;
}

.postmark span:first-child {
  font-size: 0.95rem;
}

.postmark span:last-child {
  font-size: 0.52rem;
  letter-spacing: 0.05em;
}

.priority-stamp {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.55rem;
  border: 2px solid currentColor;
  border-radius: 3px;
  transform: rotate(-3deg);
  white-space: nowrap;
}

.priority-stamp--high { color: var(--red); }
.priority-stamp--medium { color: var(--amber); }
.priority-stamp--low { color: var(--ink-muted); }

.envelope__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
}

.envelope__address {
  font-size: 0.82rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

.envelope__address strong {
  color: var(--ink);
  font-weight: 600;
}

.envelope__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.envelope__tags li {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.6rem;
  color: var(--ink-muted);
}

.envelope__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--paper-line);
}

.status-stamp {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border-radius: 3px;
  border: 2px solid currentColor;
  transform: rotate(-2deg);
  display: inline-block;
}

.status-stamp--todo { color: var(--blue); }
.status-stamp--in-progress { color: var(--amber); }
.status-stamp--blocked { color: var(--red); }
.status-stamp--done { color: var(--green); }

.envelope__notes {
  font-size: 0.75rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

/* ---------------- Empty state ---------------- */

.empty-state {
  max-width: 420px;
  margin: 3rem auto;
  text-align: center;
  color: var(--cream-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.empty-state svg {
  color: var(--cream-muted);
}

.empty-state h2 {
  color: var(--cream-text);
  font-size: 1.3rem;
}

.empty-state button {
  margin-top: 0.5rem;
  background: var(--focus);
  color: var(--ink);
  border: none;
  border-radius: var(--radius-pill);
  padding: 0.65rem 1.3rem;
  font-weight: 600;
  cursor: pointer;
}

.empty-state button:active {
  transform: scale(0.97);
}

/* ---------------- Footer ---------------- */

.depot-footer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
  color: var(--cream-muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--navy-line);
}

/* ---------------- Detail dialog ("the letter") ---------------- */

.letter-dialog {
  border: none;
  border-radius: var(--radius-card);
  padding: 0;
  max-width: 640px;
  width: min(92vw, 640px);
  max-height: 88vh;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 30px 60px rgba(5, 8, 15, 0.5);
}

.letter-dialog::backdrop {
  background: rgba(10, 14, 24, 0.72);
}

.letter-dialog[open] {
  animation: letter-in 0.22s ease-out;
}

@keyframes letter-in {
  from { opacity: 0; transform: translateY(10px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.letter-dialog__form {
  display: flex;
  flex-direction: column;
  max-height: 88vh;
}

.letter-dialog__close {
  position: sticky;
  top: 0;
  align-self: flex-end;
  margin: 0.9rem 0.9rem 0 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--navy-0);
  color: var(--cream-text);
  border: none;
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.9rem 0.45rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.letter-dialog__close:active {
  transform: scale(0.96);
}

.letter {
  padding: 0.5rem 2rem 2rem;
  overflow-y: auto;
  flex: 1 1 auto;
  min-height: 0;
}

.letter__title {
  font-size: 1.6rem;
  line-height: 1.25;
  margin: 0.4rem 0 1.1rem;
}

.letter__meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem 1.5rem;
  margin: 0 0 1.1rem;
  padding: 0.9rem 1rem;
  background: var(--paper-2);
  border-radius: var(--radius-input);
  border: 1px solid var(--paper-line);
}

.letter__meta dt {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-muted);
  margin: 0;
}

.letter__meta dd {
  margin: 0.15rem 0 0;
  font-weight: 600;
  font-size: 0.92rem;
}

.letter__tags {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.letter__tags li {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-pill);
  padding: 0.25rem 0.65rem;
  color: var(--ink-muted);
}

.letter__body {
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.letter__body p {
  margin: 0 0 0.9rem;
}

.letter__body p:last-child {
  margin-bottom: 0;
}

.letter__notes {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin: 0 0 1.4rem;
}

.sorting-action {
  border-top: 1px dashed var(--paper-line);
  padding-top: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sorting-action label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.sorting-action select {
  background: #fff;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius-input);
  padding: 0.6rem 0.8rem;
  max-width: 280px;
  font-weight: 600;
}

.sorting-action select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 1px;
}

.sorting-feedback {
  min-height: 1.2em;
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.sorting-feedback.is-visible {
  opacity: 1;
}

/* ---------------- Responsive: mobile ---------------- */

@media (max-width: 640px) {
  .depot-header {
    padding: 1.2rem 1rem 0;
  }

  .depot-header__inner {
    flex-direction: column;
    align-items: stretch;
  }

  .sorting-desk {
    flex-direction: column;
    align-items: stretch;
  }

  .field input,
  .field select {
    min-width: 0;
    width: 100%;
  }

  .tray-shelf {
    grid-template-columns: repeat(2, 1fr);
  }

  main {
    padding: 1.2rem 1rem;
  }

  .envelope-grid {
    grid-template-columns: 1fr;
  }

  .letter {
    padding: 0.5rem 1.2rem 1.5rem;
  }

  .letter__meta {
    grid-template-columns: 1fr;
  }
}

/* ---------------- Reduced motion ---------------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .letter-dialog[open] {
    animation: none;
  }

  .envelope__btn:hover,
  .envelope__btn:active,
  .tray-tile:active,
  .empty-state button:active,
  .letter-dialog__close:active {
    transform: none;
  }
}