:root {
  --bg: #07090e;
  --surface: #0d121a;
  --surface-raised: #131b26;
  --border: #1e2c3f;
  --border-bright: #2d4563;

  --accent: #00ffaa;
  --accent-hover: #33ffbb;
  --accent-tint: rgba(0, 255, 170, .12);

  --amber: #ffb703;
  --cyan: #00f0ff;
  --cyan-tint: rgba(0, 240, 255, .15);

  --superstring: #a78bfa;
  --superstring-tint: rgba(167, 139, 250, .16);
  --crystalline: #00f0ff;
  --crystalline-tint: rgba(0, 240, 255, .15);

  --text: #e2f1ec;
  --text-muted: #8ca3ba;
  --text-faint: #4d657d;
  --text-code: #5eead4;

  /* STATUS (used inline by script.js) */
  --danger: #ff5c5c;
  --danger-tint: rgba(255, 92, 92, .14);
  --danger-border: rgba(255, 92, 92, .4);
  --success: #00ffaa;
  --success-tint: rgba(0, 255, 170, .12);
  --success-border: rgba(0, 255, 170, .4);
}


/* =========================
   RESET
========================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(rgba(18, 24, 34, .75) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 24, 34, .75) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 14px;
  line-height: 1.6;
}

/* CRT scanline simulation */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, .25) 50%);
  background-size: 100% 3px;
  pointer-events: none;
  z-index: 999;
  opacity: .6;
}

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

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

select[multiple] {
  min-height: 118px;
  padding: 8px;
}

select[multiple] option {
  padding: 4px 6px;
}

button {
  cursor: pointer;
}

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

::selection {
  background: var(--accent-tint);
  color: var(--accent);
}


/* =========================
   TOP BAR
========================= */

.topbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 2px solid var(--border);
  background: rgba(13, 18, 26, .9);
  backdrop-filter: blur(8px);
  position: relative;
  z-index: 2;
}

.wordmark {
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .05em;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.wordmark-logo {
  height: 28px;
  width: auto;
  display: block;
}

.wordmark span {
  color: var(--text-faint);
  font-weight: 400;
}

.wordmark-badge {
  font-size: 11px;
  color: var(--cyan);
  border: 1px solid var(--border-bright);
  padding: 2px 8px;
  background: var(--surface-raised);
}

.system-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 4px 10px;
  background: var(--surface);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.language-switcher select {
  min-width: 112px;
  padding: 7px 9px;
  border: 1px solid var(--border-bright);
  border-radius: 0;
  background: var(--surface);
  color: var(--text);
  font-size: 11px;
  cursor: pointer;
}

.language-switcher select:hover {
  border-color: var(--accent);
}

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

.topbar-auth #topbarAuthLoggedOut,
.topbar-auth #topbarAuthLoggedIn {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-auth .btn {
  padding: 8px 14px;
  font-size: 11px;
}

.topbar-auth-email {
  font-size: 12px;
  color: var(--text-muted);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}


/* =========================
   AUTH MODAL
========================= */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 12, .75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

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

.modal {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border-bright);
  padding: 24px;
  position: relative;
  box-shadow: 0 0 40px rgba(0, 0, 0, .5);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  margin: 0;
  font-size: 15px;
  letter-spacing: .08em;
  color: #fff;
}

.modal-close {
  background: none;
  border: 1px solid var(--border-bright);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  line-height: 1;
  font-size: 16px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}

.modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.modal #authForm .field {
  margin-bottom: 16px;
}

.modal .form-actions {
  margin-top: 4px;
}


/* =========================
   MAIN
========================= */

.shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto 60px;
  position: relative;
  z-index: 1;
}


/* =========================
   HERO
========================= */

.hero {
  padding: 48px 0 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.hero-content {
  max-width: 560px;
  flex: 1 1 420px;
}

.hero-visual {
  flex: 0 0 auto;
  display: flex;
  justify-content: center;
}

.hero-visual img {
  max-width: 380px;
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 0 30px rgba(0, 255, 170, .18));
}

.terminal-tag {
  display: inline-block;
  color: var(--accent);
  background: var(--accent-tint);
  border: 1px solid var(--accent);
  padding: 4px 10px;
  font-size: 11px;
  margin-bottom: 16px;
  letter-spacing: .06em;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 20px rgba(0, 255, 170, .25);
  line-height: 1.25;
}

.cursor {
  display: inline-block;
  width: 12px;
  height: 1.1em;
  background: var(--accent);
  vertical-align: -.15em;
  animation: blink 1s step-start infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-copy {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.7;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
  margin: 0 0 24px;
}

.hero-copy::before {
  content: "// ";
  color: var(--text-faint);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}


/* =========================
   BUTTON
========================= */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border-bright);
  color: var(--text);
  background: var(--surface);
  padding: 10px 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .05em;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #04100c;
  font-weight: 700;
  box-shadow: 0 0 14px rgba(0, 255, 170, .35);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #04100c;
}

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
  box-shadow: none;
}


/* =========================
   PANEL
========================= */

.panel {
  margin-top: 24px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
}

.panel::before {
  content: "";
  position: absolute;
  top: -1px; left: -1px;
  width: 10px; height: 10px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
}

.panel::after {
  content: "";
  position: absolute;
  bottom: -1px; right: -1px;
  width: 10px; height: 10px;
  border-bottom: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.panel-header h2 {
  margin: 0;
  font-size: 15px;
  letter-spacing: .08em;
  color: #fff;
}

.panel-header h2::before {
  content: "// ";
  color: var(--accent);
}

.chip {
  border: 1px solid var(--accent);
  background: var(--accent-tint);
  color: var(--accent);
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.chip-cyan {
  border-color: var(--cyan);
  background: var(--cyan-tint);
  color: var(--cyan);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface-raised);
  color: var(--text-muted);
}

.badge.is-on {
  border-color: var(--accent);
  background: var(--accent-tint);
  color: var(--accent);
}


/* =========================
   FORM
========================= */

.field-label,
.filter-label {
  display: block;
  color: var(--cyan);
  font-size: 11px;
  margin-bottom: 6px;
  font-weight: 600;
  letter-spacing: .03em;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--border-bright);
  background: #090d14;
  color: var(--text);
  padding: 10px 12px;
  font-size: 13px;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-faint);
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 8px var(--accent-tint);
}

textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.6;
}

.code-input {
  min-height: 120px;
  font-size: 12px;
  color: var(--text-code);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238ca3ba' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.search-row {
  margin-bottom: 4px;
}

.filter-block {
  margin-top: 14px;
}


/* =========================
   FILTER
========================= */

.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.filter {
  border: 1px solid var(--border);
  background: #090e16;
  color: var(--text-muted);
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: .03em;
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}

.filter:hover {
  border-color: var(--border-bright);
  color: var(--text);
}

.filter.active {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent-tint);
  box-shadow: 0 0 10px rgba(0, 255, 170, .2);
}

.filter[data-type="Superstring"].active {
  border-color: var(--superstring);
  background: var(--superstring-tint);
}

.filter[data-type="Crystalline"].active {
  border-color: var(--crystalline);
  background: var(--crystalline-tint);
}


/* =========================
   SECTION
========================= */

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.section-heading h2 {
  margin: 0;
  font-size: 18px;
  letter-spacing: .08em;
  color: #fff;
}

.record-count {
  color: var(--accent);
  background: var(--accent-tint);
  border: 1px solid var(--accent);
  padding: 2px 8px;
  font-size: 11px;
}


/* =========================
   DECK GRID
========================= */

.deck-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.deck-card {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border-bright);
  padding: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all .2s ease;
}

.deck-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 8px; height: 8px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
}

.deck-card::after {
  content: "";
  position: absolute;
  bottom: 0; right: 0;
  width: 8px; height: 8px;
  border-bottom: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
}

.deck-card:hover {
  border-color: var(--cyan);
  background: var(--surface-raised);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 240, 255, .15);
}

.deck-card.superstring { border-top: 3px solid var(--superstring); }
.deck-card.superstring::before, .deck-card.superstring::after { border-color: var(--superstring); }
.deck-card.crystalline { border-top: 3px solid var(--crystalline); }
.deck-card.crystalline::before, .deck-card.crystalline::after { border-color: var(--crystalline); }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.record-id {
  font-size: 11px;
  color: var(--text-faint);
}

.type-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border: 1px solid;
  color: var(--text-muted);
  background: var(--surface-raised);
}

.type-badge.superstring {
  color: #fff;
  background: var(--superstring-tint);
  border-color: var(--superstring);
}

.type-badge.crystalline {
  color: #fff;
  background: var(--crystalline-tint);
  border-color: var(--crystalline);
}

.deck-name {
  margin: 6px 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.meta-line {
  font-size: 11px;
  color: var(--amber);
  margin-bottom: 8px;
}

.description {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0 0 12px;
  flex-grow: 1;
  min-height: 40px;
  line-height: 1.6;
}

.code-preview {
  background: #05080c;
  border: 1px solid #1a2738;
  padding: 8px 10px;
  margin-bottom: 12px;
}

.code-preview span {
  color: var(--text-faint);
  font-size: 10px;
  display: block;
  margin-bottom: 4px;
}

.code-preview code {
  color: var(--text-code);
  font-size: 11px;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
  font-size: 11px;
  color: var(--text-faint);
}

.card-bottom strong {
  color: var(--cyan);
  font-weight: 700;
}

.copy-btn {
  border: 1px solid var(--accent);
  background: var(--accent-tint);
  color: var(--accent);
  padding: 4px 10px;
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  transition: .15s ease;
}

.copy-btn:hover {
  background: var(--accent);
  color: #000;
}


/* =========================
   OWNER ACTIONS
========================= */

.card-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.edit-btn,
.delete-btn {
  flex: 1;
  border: 1px solid var(--border-bright);
  background: transparent;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  font-family: inherit;
  transition: .15s ease;
}

.edit-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.delete-btn {
  color: var(--danger);
  border-color: var(--danger-border);
}

.delete-btn:hover {
  background: var(--danger-tint);
}

.delete-btn:disabled,
.edit-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}


/* =========================
   EMPTY
========================= */

.empty-state {
  text-align: left;
  border: 1px dashed var(--border-bright);
  padding: 32px 26px;
  color: var(--text-muted);
}

.empty-state h3 {
  color: #fff;
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
}

.empty-state p {
  margin: 0;
  font-size: 13px;
}

.hidden {
  display: none !important;
}


/* =========================
   FORM RESULT
========================= */

.upload-result {
  margin-top: 18px;
  border: 1px solid var(--success-border);
  background: var(--success-tint);
  padding: 12px 14px;
  color: var(--success);
  font-size: 12px;
  line-height: 1.7;
}

.upload-result.is-error {
  border-color: var(--danger-border);
  background: var(--danger-tint);
  color: var(--danger);
}


/* =========================
   FOOTER
========================= */

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding: 20px 0;
  margin-top: 48px;
  color: var(--text-faint);
  font-size: 11px;
  letter-spacing: .03em;
}

.donate-icon {
  min-height: 38px;
  padding: 3px 10px 3px 3px;
  border: 1px solid var(--border-bright);
  background: var(--surface);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .03em;
  transition: border-color .15s ease, transform .15s ease;
}

.donate-icon:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.donate-icon img {
  display: block;
  width: 30px;
  height: 30px;
  object-fit: cover;
}

.donate-modal {
  text-align: center;
}

.donate-image {
  display: block;
  width: 96px;
  height: 96px;
  margin: 4px auto 16px;
  object-fit: cover;
  border: 1px solid var(--border-bright);
}

.donate-copy {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 12px;
}

.donate-link {
  display: inline-block;
}


/* =========================
   RESPONSIVE
========================= */

.form-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}

.field {
  margin-bottom: 16px;
}

.field-hint {
  margin-top: 7px;
  color: var(--text-faint);
  font-size: 11px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 860px) {
  .deck-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { flex-direction: column; align-items: flex-start; }
  .hero-visual { align-self: center; }
  .hero-visual img { max-width: 280px; }
}

@media (max-width: 640px) {
  .topbar { padding: 14px 16px; flex-wrap: wrap; }
  .shell { width: min(100% - 24px, 1200px); }
  .deck-grid, .form-grid { grid-template-columns: 1fr; }
  .section-heading, footer { align-items: flex-start; flex-direction: column; }
  .hero-visual img { max-width: 220px; }
}