:root {
  --paper-bg: #ede2cf;
  --paper-surface: #f8f1e4;
  --paper-panel: #f5ecdd;
  --paper-panel-strong: #fbf6ec;
  --paper-line: #cdbda8;
  --paper-line-strong: #b79f84;
  --ink: #30271f;
  --muted-ink: #6c6155;
  --accent: #547aa8;
  --danger: #8d5a57;
  --shadow-soft: 0 10px 22px rgba(99, 76, 49, 0.1), 0 2px 6px rgba(99, 76, 49, 0.06);
  --shadow-paper: 0 24px 32px rgba(99, 76, 49, 0.12), 0 5px 12px rgba(99, 76, 49, 0.08);
  --shadow-deep: 0 32px 46px rgba(77, 60, 39, 0.16), 0 8px 16px rgba(77, 60, 39, 0.1);
  --font-heading: "Courier Prime", "Courier New", "Nimbus Mono PS", monospace;
  --font-body: "Georgia", "Times New Roman", serif;
  --motion-fast: 180ms;
  --motion-mid: 280ms;
}

html[data-theme="dark"] {
  --paper-bg: #121110;
  --paper-surface: #191715;
  --paper-panel: #23201d;
  --paper-panel-strong: #2c2824;
  --paper-line: #4f463d;
  --paper-line-strong: #6a5d51;
  --ink: #f3e8d7;
  --muted-ink: #ccbca6;
  --accent: #7598c8;
  --danger: #bf8a84;
  --shadow-soft: 0 12px 24px rgba(0, 0, 0, 0.26), 0 3px 8px rgba(0, 0, 0, 0.16);
  --shadow-paper: 0 24px 34px rgba(0, 0, 0, 0.34), 0 6px 14px rgba(0, 0, 0, 0.2);
  --shadow-deep: 0 34px 52px rgba(0, 0, 0, 0.42), 0 8px 16px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 255, 255, 0.24), transparent 26%),
    radial-gradient(circle at 100% 20%, rgba(160, 135, 95, 0.1), transparent 26%),
    linear-gradient(180deg, rgba(137, 112, 79, 0.03), transparent 12%, transparent 88%, rgba(137, 112, 79, 0.04)),
    var(--paper-bg);
  transition: background-color var(--motion-mid) ease, color var(--motion-mid) ease;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  opacity: 0.34;
  background:
    radial-gradient(circle at 15% 22%, rgba(102, 83, 60, 0.05) 0 1px, transparent 1px 100%),
    radial-gradient(circle at 76% 36%, rgba(102, 83, 60, 0.03) 0 1px, transparent 1px 100%),
    radial-gradient(circle at 43% 81%, rgba(102, 83, 60, 0.03) 0 1px, transparent 1px 100%);
  background-size: 13px 13px, 18px 18px, 22px 22px;
  mix-blend-mode: multiply;
}

body::after {
  opacity: 0.05;
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(0, 0, 0, 0.18) 12% 12.2%, transparent 12.2% 100%),
    linear-gradient(180deg, transparent 0 18%, rgba(0, 0, 0, 0.18) 18% 18.1%, transparent 18.1% 100%);
}

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

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

.snippet-app {
  width: min(1280px, calc(100% - 2rem));
  margin: 1rem auto 2rem;
}

.app-header,
.filters-panel,
.snippets-panel,
.snippet-card,
.modal-card,
.paper-input,
.paper-button,
.theme-toggle,
.empty-state {
  position: relative;
  border: 1px solid color-mix(in srgb, var(--paper-line) 74%, transparent);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.03)),
    var(--paper-panel);
  box-shadow: var(--shadow-paper);
}

.app-header::before,
.filters-panel::before,
.snippets-panel::before,
.snippet-card::before,
.modal-card::before,
.paper-input::before,
.paper-button::before,
.theme-toggle::before,
.empty-state::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 18%, transparent 82%, rgba(0, 0, 0, 0.03)),
    radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.14), transparent 22%),
    radial-gradient(circle at 80% 74%, rgba(0, 0, 0, 0.03), transparent 28%);
  opacity: 0.7;
}

.app-header,
.filters-panel,
.snippets-panel,
.modal-card {
  clip-path: polygon(1% 0.7%, 99% 0, 100% 5%, 99.4% 12%, 100% 21%, 99% 39%, 100% 56%, 99.5% 72%, 100% 89%, 98.5% 99.4%, 92% 100%, 77% 99.2%, 63% 100%, 48% 99.2%, 34% 100%, 17% 99.1%, 3% 100%, 0 96%, 0.6% 79%, 0 61%, 0.7% 43%, 0 25%, 0.9% 11%);
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.5rem 1.6rem;
}

.back-link,
.subtitle,
.field-label,
.panel-topline p,
.snippet-type,
.snippet-date,
.filter-note,
.modal-note {
  font-family: var(--font-heading);
}

.back-link {
  display: inline-block;
  margin-bottom: 0.8rem;
  color: var(--accent);
  font-size: 0.92rem;
}

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

h1 {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  line-height: 1.02;
}

.subtitle {
  margin: 1rem 0 0;
  color: var(--muted-ink);
  font-size: 1rem;
  line-height: 1.7;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.theme-toggle,
.paper-button,
.icon-button {
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 80%, transparent);
  color: var(--ink);
  transition: transform var(--motion-fast) ease, box-shadow var(--motion-mid) ease, color var(--motion-fast) ease;
}

.theme-toggle,
.paper-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.9rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-heading);
}

.paper-button:hover,
.theme-toggle:hover,
.icon-button:hover,
.snippet-card:hover {
  transform: translateY(-3px);
}

.paper-button:active,
.theme-toggle:active,
.icon-button:active {
  transform: translateY(1px) scale(0.985);
}

.paper-button-small {
  min-height: 2.2rem;
  padding: 0.5rem 0.8rem;
  font-size: 0.88rem;
}

.paper-button-muted {
  color: var(--muted-ink);
}

.paper-button-danger {
  color: var(--danger);
}

.theme-icon {
  transition: transform var(--motion-mid) ease;
}

html[data-theme="dark"] .theme-icon {
  transform: rotate(180deg);
}

.app-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1.2rem;
  margin-top: 1.2rem;
}

.filters-panel,
.snippets-panel,
.empty-state {
  padding: 1.3rem;
}

.filters-panel {
  position: sticky;
  top: 1rem;
  align-self: start;
}

.panel-heading {
  margin-bottom: 1rem;
}

.heading-stroke {
  display: inline-block;
  width: 3.5rem;
  height: 4px;
  margin-top: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), rgba(84, 122, 168, 0.08));
  transform: rotate(-2deg);
}

.field-label {
  display: block;
  margin: 0.95rem 0 0.35rem;
  font-size: 0.88rem;
  color: var(--muted-ink);
}

.paper-input {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border-radius: 14px;
  outline: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
}

textarea.paper-input {
  resize: vertical;
}

.paper-input:focus {
  border-color: color-mix(in srgb, var(--accent) 68%, var(--paper-line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent), var(--shadow-soft);
}

.filter-note,
.modal-note,
.snippet-type,
.snippet-date,
.panel-topline p {
  color: var(--muted-ink);
  font-size: 0.86rem;
}

.snippets-panel {
  min-height: 60vh;
}

.panel-topline {
  margin-bottom: 1rem;
}

.panel-topline p {
  margin: 0;
}

.snippet-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.snippet-card,
.empty-state {
  border-radius: 14px 16px 18px 13px;
}

.snippet-card {
  padding: 1.1rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
  transition: transform var(--motion-fast) ease, box-shadow var(--motion-mid) ease;
}

.snippet-card-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.snippet-title {
  font-size: 1.25rem;
  line-height: 1.2;
}

.snippet-type,
.snippet-date {
  margin: 0.25rem 0 0;
}

.snippet-date {
  text-align: right;
}

.snippet-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.95rem;
  min-height: 1.8rem;
}

.tag-chip {
  padding: 0.25rem 0.55rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 72%, transparent);
  border-radius: 999px;
  color: var(--accent);
  font-family: var(--font-heading);
  font-size: 0.76rem;
  background: rgba(84, 122, 168, 0.08);
}

.snippet-preview {
  margin: 0.95rem 0 0;
  min-height: 9rem;
  max-height: 14rem;
  overflow: auto;
  padding: 0.9rem;
  border: 1px solid color-mix(in srgb, var(--paper-line) 70%, transparent);
  border-radius: 14px;
  background: color-mix(in srgb, var(--paper-panel) 82%, transparent);
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.snippet-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 18rem;
  text-align: center;
}

.empty-state p {
  margin: 0.7rem 0 0;
  color: var(--muted-ink);
  font-family: var(--font-heading);
}

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

.modal-shell {
  position: fixed;
  inset: 0;
  z-index: 60;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(35, 28, 20, 0.32);
  backdrop-filter: blur(2px);
}

.modal-card {
  position: relative;
  width: min(760px, calc(100% - 1.2rem));
  margin: 4vh auto 0;
  padding: 1.3rem;
  z-index: 1;
}

.modal-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.icon-button {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-soft);
  font-size: 1.35rem;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.paper-textarea {
  min-height: 18rem;
}

.modal-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.copied-state {
  color: var(--accent);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .filters-panel {
    position: static;
  }

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

@media (max-width: 720px) {
  .snippet-app {
    width: calc(100% - 1rem);
    margin: 0.5rem auto 1.4rem;
  }

  .app-header {
    padding: 1.15rem;
  }

  .header-actions,
  .field-row,
  .modal-actions {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .modal-card {
    margin-top: 1rem;
    padding: 1rem;
  }

  .snippet-card-top {
    flex-direction: column;
  }

  .snippet-date {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}