/* ── Reset ────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design tokens (lifted from helpmeinpost.com) ── */
:root {
  --bg:             #07090c;
  --bg-surface:     #0b0e14;
  --bg-surface-2:   #11151d;
  --border:         rgba(255,255,255,0.07);
  --border-strong:  rgba(255,255,255,0.12);
  --border-purple:  rgba(6,182,212,0.45);
  --accent:         #06b6d4;
  --accent-2:       #0891b2;
  --gold:           #e8bc5a;
  --green:          #4ade80;
  --red:            #f87171;
  --orange:         #f97316;
  --sky:            #0ea5e9;
  --text:           #e8edf4;
  --text-2:         #788898;
  --text-3:         #38475a;
  --radius:         14px;
  --radius-sm:      8px;
  --radius-lg:      20px;
  --mono:           ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-optical-sizing: auto;
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 14px;
  line-height: 1.5;
}

body {
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
}

/* Subtle film-grain overlay (matches HMIP). */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='256' height='256'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23g)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  mix-blend-mode: overlay;
}

/* ── Nav ──────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 500;
  padding: 14px 0;
  background: rgba(7, 9, 12, 0.84);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border-bottom: 1px solid var(--border);
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.nav-logo { flex-shrink: 0; }

.wordmark {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  white-space: nowrap;
}

.wordmark strong { color: var(--accent); font-weight: 800; }

.tool-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px 5px 9px;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.22);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.tool-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.7);
}

/* ── Hero ─────────────────────────────────────── */
.tool-hero {
  position: relative;
  padding: 56px 0 36px;
  overflow: hidden;
}

.tool-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  width: 700px;
  height: 380px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(8, 145, 178, 0.12) 0%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  opacity: 0.55;
}

.hero-eyebrow::before { background: linear-gradient(90deg, transparent, var(--accent)); }
.hero-eyebrow::after  { background: linear-gradient(90deg, var(--accent), transparent); }

.hero-title {
  font-size: clamp(32px, 4.4vw, 48px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  background: linear-gradient(165deg, #e8edf4 0%, #c4d0e0 50%, #7a9ab5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title .accent-word {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 14px;
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Tool layout ──────────────────────────────── */
.tool-main {
  max-width: 1280px;
  margin: 0 auto 60px;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1fr 320px;
  grid-template-rows: minmax(360px, auto) auto auto;
  grid-template-areas:
    "input    settings"
    "preview  preview"
    "actions  actions";
  gap: 16px;
}

/* ── Input area ───────────────────────────────── */
.input-area {
  grid-area: input;
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 0;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.018), transparent);
}

.panel-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-2);
}

.file-pick {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-3);
}

#file-input {
  font-size: 11px;
  color: var(--text-2);
  background: transparent;
  border: none;
}

#file-input::file-selector-button {
  background: var(--bg-surface-2);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  margin-right: 8px;
  font-family: inherit;
}

#file-input::file-selector-button:hover { background: var(--border); }

#paste {
  flex: 1;
  background: transparent;
  color: var(--text);
  border: none;
  padding: 16px 18px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  resize: none;
  outline: none;
  min-height: 320px;
}

#paste::placeholder { color: var(--text-3); }
#paste.drag-over    { background: rgba(6, 182, 212, 0.04); }

/* ── Settings sidebar ─────────────────────────── */
.settings {
  grid-area: settings;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: fit-content;
}

.settings-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2px;
}

.settings label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}

.settings input[type="text"],
.settings input[type="date"],
.settings select {
  background: var(--bg-surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  font-size: 13px;
  font-family: inherit;
  font-weight: 500;
  letter-spacing: normal;
  text-transform: none;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}

.settings input[type="text"]:focus,
.settings input[type="date"]:focus,
.settings select:focus {
  border-color: var(--border-purple);
  background: rgba(6, 182, 212, 0.04);
}

.settings input[type="date"] {
  color-scheme: dark;
}

.settings select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path d='M1 1L5 5L9 1' stroke='%23788898' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' fill='none'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.hint {
  display: block;
  margin-top: 4px;
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-3);
  font-family: var(--mono);
  text-transform: none;
  letter-spacing: 0;
  line-height: 1.4;
}

.hint.err { color: var(--red); }

input.invalid { border-color: var(--red) !important; }

.preset-row {
  display: flex;
  gap: 5px;
  margin-top: 6px;
  flex-wrap: wrap;
}

button.preset {
  background: var(--bg-surface-2);
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: 6px;
  font-size: 10.5px;
  font-family: var(--mono);
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

button.preset:hover {
  color: var(--accent);
  border-color: var(--border-purple);
  background: rgba(6, 182, 212, 0.06);
}

details summary {
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  user-select: none;
  padding: 8px 0;
  border-top: 1px solid var(--border);
  margin-top: 6px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

details summary::before {
  content: '▸';
  font-size: 9px;
  color: var(--text-3);
  transition: transform 0.2s;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details summary::-webkit-details-marker { display: none; }

details > label { margin-top: 10px; display: flex; flex-direction: column; gap: 5px; }

/* ── Preview ──────────────────────────────────── */
.preview {
  grid-area: preview;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.018), transparent);
}

.preview-summary {
  font-size: 12px;
  color: var(--text-2);
  font-weight: 500;
  font-family: var(--mono);
}

.preview-summary .ok   { color: var(--green); font-weight: 600; }
.preview-summary .warn { color: var(--gold);  font-weight: 600; }
.preview-summary .err  { color: var(--red);   font-weight: 600; }

.preview-table-wrap {
  overflow: auto;
  max-height: 60vh;
}

#preview-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  font-family: var(--mono);
}

#preview-table thead th {
  position: sticky;
  top: 0;
  background: var(--bg-surface-2);
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 9px 14px;
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.12em;
  font-family: 'Inter', sans-serif;
  z-index: 1;
}

#preview-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.12s;
}

#preview-table tbody tr:last-child { border-bottom: none; }
#preview-table tbody tr:hover      { background: rgba(6, 182, 212, 0.025); }

#preview-table tbody tr.error { background: rgba(248, 113, 113, 0.06); }
#preview-table tbody tr.warn  { background: rgba(232, 188, 90, 0.04); }

#preview-table td {
  padding: 8px 14px;
  vertical-align: top;
  word-break: break-word;
  color: var(--text);
}

#preview-table td.col-num     { width: 40px; color: var(--text-3); font-weight: 600; }
#preview-table td.col-input   { width: 90px; color: var(--accent); }
#preview-table td.col-interp  { width: 100px; color: var(--text-3); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; }
#preview-table td.col-tc      { width: 115px; color: var(--text); }
#preview-table td.col-frames  { width: 80px; text-align: right; color: var(--text-2); }
#preview-table td.col-comment { color: var(--text); }
#preview-table td.col-flags   { width: 150px; }

.flag {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 9.5px;
  font-weight: 700;
  margin-right: 4px;
  margin-bottom: 3px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: 'Inter', sans-serif;
}

.flag.warn { background: rgba(232, 188, 90, 0.14); color: var(--gold);  }
.flag.err  { background: rgba(248, 113, 113, 0.14); color: var(--red);   }
.flag.info { background: rgba(6, 182, 212, 0.14); color: var(--accent);}

/* ── Actions ──────────────────────────────────── */
.actions {
  grid-area: actions;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

button {
  font-family: inherit;
  cursor: pointer;
}

button#download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #07090c;
  border: none;
  border-radius: 9px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}

button#download:hover:not(:disabled) {
  opacity: 0.94;
  transform: translateY(-1px);
  box-shadow: 0 10px 32px rgba(8, 145, 178, 0.35);
}

button#download:disabled {
  background: var(--bg-surface-2);
  color: var(--text-3);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

button#copy {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

button#copy:hover:not(:disabled) {
  border-color: var(--border-purple);
  color: var(--accent);
  background: rgba(6, 182, 212, 0.04);
}

button#copy:disabled {
  color: var(--text-3);
  border-color: var(--border);
  cursor: not-allowed;
}

.status {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-3);
  font-weight: 500;
}

.status.ok  { color: var(--green); }
.status.err { color: var(--red); }

/* ── Footer ───────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 32px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-3);
  text-align: center;
}

.site-footer a {
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.15s;
}

.site-footer a:hover { color: var(--accent); }

/* ── Responsive ───────────────────────────────── */
@media (max-width: 900px) {
  .tool-main {
    grid-template-columns: 1fr;
    grid-template-areas:
      "input"
      "settings"
      "preview"
      "actions";
  }
  .container, .tool-main { padding: 0 18px; }
  .hero-title { font-size: 32px; }
}