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

:root {
  --bg: #F1FAFE;
  --bg2: #ffffff;
  --bg3: #F5F9FC;
  --border: #0096C7;
  --border2: #0077B6;
  --text: #1a1a1a;
  --text2: #4a4a4a;
  --text3: #707070;
  --accent: #0096C7;
  --accent2: #0077B6;
  --accent-bg: rgba(0,150,199,0.1);
  --accent-border: rgba(0,150,199,0.4);
  --green: #2a7a4a;
  --green-bg: rgba(42,122,74,0.1);
  --radius: 8px;
  --radius-sm: 5px;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: 'DM Sans', 'Outfit', system-ui, sans-serif;
  --shadow: 0 1px 3px rgba(0,150,199,0.15);
}

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

html { font-size: 14px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 0 0 60px;
  position: relative;
  overflow-x: hidden;
}

/* ── Background Grid ──────────────────────────────────────── */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,150,199,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,150,199,0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ── Header ───────────────────────────────────────────────── */
header {
  position: relative; z-index: 1;
  text-align: center;
  padding: 48px 24px 28px;
  border-bottom: 1px solid var(--border);
}
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 8px;
}
.logo-icon {
  font-size: 28px; line-height: 1;
  color: var(--accent);
}
.logo-text {
  font-size: 22px; font-weight: 600; letter-spacing: -0.5px; margin: 0;
}
.tagline {
  font-size: 13px; color: var(--text3); letter-spacing: 0.02em;
}

/* ── Main ─────────────────────────────────────────────────── */
main {
  position: relative; z-index: 1;
  max-width: 1100px; margin: 0 auto;
  padding: 28px 24px 0;
  display: flex; flex-direction: column; gap: 16px;
}

/* ── Controls Bar ─────────────────────────────────────────── */
.controls-bar {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: center;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 18px;
}
.control-group { display: flex; align-items: center; gap: 8px; }
.control-group label:not(.checkbox-label) {
  font-size: 12px; color: var(--text2); font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase;
}
select {
  font-family: var(--font-sans); font-size: 13px;
  padding: 5px 10px;
  background: var(--bg3); color: var(--text);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  cursor: pointer; outline: none;
  transition: border-color 0.15s;
}
select:focus { border-color: var(--accent); }

.checkbox-label {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; color: var(--text2);
  cursor: pointer; user-select: none;
}
.checkbox-label input[type="checkbox"] { display: none; }
.checkmark {
  width: 16px; height: 16px; flex-shrink: 0;
  border: 1.5px solid var(--border2);
  border-radius: 4px;
  background: var(--bg3);
  transition: all 0.15s;
  position: relative;
}
.checkbox-label input:checked + .checkmark {
  background: var(--accent);
  border-color: var(--accent);
}
.checkbox-label input:checked + .checkmark::after {
  content: '';
  position: absolute; left: 3px; top: 1px;
  width: 8px; height: 5px;
  border-left: 1.5px solid #fff;
  border-bottom: 1.5px solid #fff;
  transform: rotate(-45deg);
}

/* ── Strip Section ────────────────────────────────────────── */
.strip-section {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  display: flex; flex-direction: column; gap: 10px;
}
.strip-header {
  display: flex; align-items: center; justify-content: space-between;
}
.section-label {
  font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text3);
}
.char-btns {
  display: flex; flex-wrap: wrap; gap: 5px;
}
.char-btn {
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  padding: 4px 11px;
  background: var(--bg3); color: var(--text2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.13s;
  user-select: none;
}
.char-btn:hover { border-color: var(--accent); color: var(--accent2); }
.char-btn.active {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.custom-row {
  display: flex; gap: 8px; align-items: center;
}
.custom-row input {
  flex: 1; max-width: 300px;
  font-family: var(--font-mono); font-size: 13px;
  padding: 6px 12px;
  background: var(--bg3); color: var(--text);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  outline: none; transition: border-color 0.15s;
}
.custom-row input::placeholder { color: var(--text3); }
.custom-row input:focus { border-color: var(--accent); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn-solid {
  font-family: var(--font-sans); font-weight: 500; cursor: pointer;
  background: var(--accent); color: #ffffff;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  transition: all 0.13s;
}
.btn-solid:hover { background: var(--accent2); border-color: var(--accent2); }
.btn-ghost {
  font-family: var(--font-sans); font-weight: 500; cursor: pointer;
  background: transparent; color: var(--text2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  transition: all 0.13s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--border); }
.btn-sm { font-size: 12px; padding: 5px 12px; }
.btn-xs { font-size: 11px; padding: 3px 9px; }
button:active { transform: scale(0.97); }
.btn-copied {
  background: var(--green-bg) !important;
  color: var(--green) !important;
  border-color: var(--green) !important;
}

/* ── Editor Panels ────────────────────────────────────────── */
.panels {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  gap: 0;
  align-items: stretch;
}
.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
}
.panel-label {
  font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text3);
}
.panel-meta { display: flex; align-items: center; gap: 6px; }
.badge {
  font-size: 10px; font-weight: 500; font-family: var(--font-mono);
  padding: 2px 7px; border-radius: 99px;
  background: var(--bg); color: var(--text3);
  border: 1px solid var(--border);
}
textarea {
  flex: 1; resize: none;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7;
  padding: 14px 16px;
  background: transparent; color: var(--text);
  border: none; outline: none;
  min-height: 260px;
}
textarea::placeholder { color: var(--text3); }
textarea[readonly] { color: var(--text2); }

/* Arrow divider */
.panel-divider {
  display: flex; align-items: center; justify-content: center;
}
.arrow-wrap {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--accent);
}
.arrow-wrap svg { width: 14px; height: 14px; }

/* ── Stats Bar ────────────────────────────────────────────── */
.stats-bar {
  font-size: 11px; font-family: var(--font-mono);
  color: var(--text3);
  text-align: center;
  min-height: 18px;
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 700px) {
  .panels { grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
  .panel-divider { transform: rotate(90deg); margin: 4px auto; }
  main { padding: 16px 14px 0; }
}