/* ──────────────────────────────────────────────────────────────
   SLR TECH Tools — Global Styles
   Theme: green / white, dark-mode aware, no frameworks
   ────────────────────────────────────────────────────────────── */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --bg: #f6fbf7;
  --surface: #ffffff;
  --text: #183026;
  --muted: #5b7067;
  --accent: #39a96b;
  --accent-dark: #2f8756;
  --accent-light: rgba(57, 169, 107, 0.12);
  --border: #d8e7dc;
  --shadow: 0 4px 20px rgba(27, 80, 54, 0.08);
  --shadow-hover: 0 12px 32px rgba(27, 80, 54, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
}

[data-theme="dark"] {
  --bg: #0f1a15;
  --surface: #17261f;
  --text: #e9f7ee;
  --muted: #a5c2b1;
  --accent: #61d694;
  --accent-dark: #4db97d;
  --accent-light: rgba(97, 214, 148, 0.12);
  --border: #294238;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
}

/* ── Base ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0;
  zoom: 0.8;
  font-family: Inter, 'Segoe UI', Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: var(--accent-dark); text-decoration: none; transition: color .15s; }
a:hover { text-decoration: underline; color: var(--accent); }
h2, h3, h4 { line-height: 1.25; }

/* ── Layout ─────────────────────────────────────────────────── */
.container { max-width: 1140px; margin: 0 auto; padding: 0 1.25rem; }

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in oklab, var(--surface) 92%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: .8rem 0; gap: .75rem; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-logo {
  width: 42px; height: 42px;
  padding: 5px;
  object-fit: contain;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid color-mix(in oklab, var(--accent) 32%, transparent);
  box-shadow: 0 2px 10px color-mix(in oklab, var(--accent) 18%, transparent);
  display: block;
}
.brand-text b {
  display: block;
  font-size: 13px; font-weight: 800;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--text);
}
.brand-text span {
  display: block;
  font-size: 11px; color: var(--muted); margin-top: 1px;
}
.nav-links { display: flex; flex-wrap: wrap; gap: .25rem; }
.nav-links a {
  padding: .38rem .7rem; border-radius: 999px;
  color: var(--muted); font-weight: 600; font-size: .88rem;
  transition: background .18s, color .18s;
}
.nav-links a.active {
  background: var(--accent-light);
  color: var(--accent-dark);
  text-decoration: none;
}
.nav-links a:hover { background: var(--accent-light); color: var(--accent-dark); text-decoration: none; }
.theme-toggle {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 999px; padding: .38rem .75rem; cursor: pointer; font-size: .86rem;
  transition: border-color .18s, background .18s;
}
.theme-toggle:hover { border-color: var(--accent); background: var(--accent-light); }

/* ── Hero ───────────────────────────────────────────────────── */
.hero { padding: 3rem 0 2rem; }
.hero h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); line-height: 1.2; margin: 0 0 .85rem; }
.hero p { color: var(--muted); margin: 0 0 .75rem; max-width: 820px; }

/* Premium hero (homepage) */
.premium-hero {
  background: linear-gradient(
    135deg,
    color-mix(in oklab, var(--accent) 9%, var(--bg)),
    color-mix(in oklab, var(--accent) 4%, var(--surface))
  );
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 2.5rem 2rem 2rem;
  margin-top: 1rem;
  position: relative;
  overflow: hidden;
}
.premium-hero::before {
  content: '';
  position: absolute; top: -70px; right: -70px;
  width: 240px; height: 240px; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in oklab, var(--accent) 20%, transparent), transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: .25rem .7rem;
  font-size: .76rem; font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase;
  margin-bottom: .8rem;
}
.hero-banner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-top: 1.25rem;
}
.hero-banner h2 { font-size: 1rem; margin: 0 0 .35rem; }
.hero-banner p { margin: 0; font-size: .9rem; }

/* ── Section headers ────────────────────────────────────────── */
.section { margin: 1.5rem 0; }
.section > h2 {
  font-size: 1.15rem; margin: 0 0 .85rem;
  display: flex; align-items: center; gap: .55rem;
}
.section > h2::after {
  content: ''; flex: 1; height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px; opacity: .3;
}
.content-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  margin: 1rem 0;
}
.content-section h2 { font-size: 1.15rem; margin-top: 0; }
.content-section h3 { font-size: 1rem; margin: 1rem 0 .4rem; }
.benefits { padding-left: 1.15rem; }
.benefits li { margin-bottom: .3rem; }

/* ── Grid ───────────────────────────────────────────────────── */
.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  transition: box-shadow .2s, border-color .2s, transform .2s;
}
.card h2, .card h3 { margin-top: 0; }

/* Tool cards */
.tool-card {
  display: flex; flex-direction: column;
  cursor: default;
  padding: 1.1rem;
}
.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.tool-card-icon {
  display: flex; align-items: center; justify-content: center;
  align-self: flex-start;
  width: 40%; height: 2rem;
  font-size: 1rem; line-height: 1;
  background: color-mix(in oklab, var(--accent) 9%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 25%, transparent);
  border-radius: 999px;
  margin-bottom: .6rem;
}
.tool-card h3 { font-size: 1rem; margin: 0 0 .35rem; }
.tool-card p {
  margin: 0; font-size: .88rem; color: var(--muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  flex: 1;
}
.tool-card .cta {
  display: inline-block;
  background: var(--accent); color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 700; padding: .42rem .75rem; font-size: .85rem;
  margin-top: .7rem; align-self: flex-start;
  transition: background .18s, transform .15s;
}
.tool-card .cta:hover { background: var(--accent-dark); transform: translateY(-1px); text-decoration: none; }

/* ── Buttons ────────────────────────────────────────────────── */
button {
  border: 0; background: var(--accent); color: #fff;
  border-radius: var(--radius-sm); padding: .58rem 1rem;
  cursor: pointer; font-weight: 700; font-size: .9rem;
  transition: background .18s, transform .15s, box-shadow .18s;
  white-space: nowrap;
}
button:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(47,135,86,.25); }
button:active { transform: translateY(0); box-shadow: none; }
button.secondary {
  background: transparent; border: 1px solid var(--border);
  color: var(--text); box-shadow: none;
}
button.secondary:hover {
  background: var(--accent-light); border-color: var(--accent);
  color: var(--accent-dark); box-shadow: none; transform: translateY(-1px);
}

/* ── Form inputs ────────────────────────────────────────────── */
input[type="text"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .55rem .75rem;
  background: var(--surface); color: var(--text);
  font-size: .9rem;
  transition: border-color .18s, box-shadow .18s;
}
input:focus, select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(57, 169, 107, .15);
}

/* ── Textareas & Output panes ───────────────────────────────── */
textarea {
  width: 100%; min-height: 260px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text);
  padding: .9rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: .87rem; line-height: 1.55;
  transition: border-color .18s, box-shadow .18s;
  resize: vertical;
}
textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(57,169,107,.12);
}
pre {
  white-space: pre-wrap; word-break: break-word;
  overflow: auto; margin: 0;
}
pre.output {
  width: 100%; min-height: 260px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text);
  padding: .9rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: .87rem; line-height: 1.55;
}
.output.ok { border-left: 4px solid var(--accent); }
.output.error { border-left: 4px solid #d64545; }

/* ── Tool actions bar ───────────────────────────────────────── */
.tool-actions {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin: .75rem 0; align-items: center;
}

/* ── Split workspace ────────────────────────────────────────── */
.split-workspace {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .9rem; align-items: start;
}
.split-workspace .tool-actions { grid-column: 1 / -1; margin: 0 0 .2rem; }
.split-workspace textarea,
.split-workspace pre.output { min-height: 360px; margin: 0; }

/* ── Stat cards (word counter, stats tool) ──────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: .65rem;
}
.stat-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .85rem 1rem; text-align: center;
  transition: border-color .18s;
}
.stat-card:hover { border-color: var(--accent); }
.stat-value { font-size: 1.8rem; font-weight: 800; color: var(--accent-dark); line-height: 1.1; }
.stat-label { font-size: .78rem; color: var(--muted); margin-top: .3rem; text-transform: uppercase; letter-spacing: .04em; }

/* ── Color tool ─────────────────────────────────────────────── */
.color-swatch {
  width: 100%; height: 80px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  margin-bottom: .75rem; background: #39a96b;
  transition: background .35s;
}

/* ── Inline status ──────────────────────────────────────────── */
.compare-inline-status {
  border-radius: var(--radius-sm);
  padding: .5rem .8rem; border: 1px solid transparent;
  min-height: 1.2rem; font-size: .9rem; margin-bottom: .6rem;
}
.compare-inline-status.ok {
  border-color: rgba(14,173,105,.4); background: rgba(14,173,105,.08);
  color: #0a7d4b;
}
.compare-inline-status.error {
  border-color: rgba(214,69,69,.4); background: rgba(214,69,69,.08);
  color: #c33;
}
[data-theme="dark"] .compare-inline-status.ok { color: #61d694; }
[data-theme="dark"] .compare-inline-status.error { color: #f48080; }
small, .muted { color: var(--muted); }

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer { margin-top: 4rem; border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { padding: 1.75rem 0; display: grid; gap: .85rem; }
.footer-brand-row { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.footer-brand-row strong { font-size: 1rem; }
.footer-parent { font-size: .85rem; color: var(--muted); }
.footer-parent a { color: var(--accent-dark); font-weight: 600; }
.footer-parent a:hover { color: var(--accent); text-decoration: underline; }
.footer-links { display: flex; flex-wrap: wrap; gap: .7rem; font-size: .9rem; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent-dark); text-decoration: underline; }

/* ── Page layout (full-width sidebar + content) ─────────────── */
.page-layout { display: flex; align-items: flex-start; margin: 0; padding: 0; }
.page-right   { flex: 1; min-width: 0; }

/* ── Tool sidebar ───────────────────────────────────────────── */
.tool-sidebar-wrap {
  position: sticky;
  top: 4.5rem;              /* fallback; overridden by JS */
  flex-shrink: 0;
  width: 2.75rem;           /* collapsed: icon strip only */
  height: calc(100vh - 4.5rem); /* overridden by JS */
  overflow: hidden;
  transition: width .22s cubic-bezier(.4,0,.2,1);
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 20;
  display: flex;
  flex-direction: column;
}
.page-layout.sidebar-open .tool-sidebar-wrap { width: 220px; }
.tool-menu-toggle {
  display: flex; align-items: center; justify-content: flex-start;
  width: 100%; margin: 0; padding: .55rem .55rem;
  flex-shrink: 0;
}
.tool-menu-toggle .menu-icon { font-size: 1rem; line-height: 1; }
.tool-menu-toggle .menu-label { display: none; }
.tool-sidebar {
  width: 196px; /* wider than collapsed parent; clips via overflow:hidden */
  flex: 1;
  padding: .5rem .25rem .75rem;
  overflow-y: auto;
  opacity: 0; visibility: hidden;
  transition: opacity .18s ease, visibility .18s;
}
.page-layout.sidebar-open .tool-sidebar { opacity: 1; visibility: visible; }
.tool-sidebar-header {
  font-weight: 800; margin-bottom: .8rem; font-size: .85rem;
  color: var(--accent-dark); text-transform: uppercase; letter-spacing: .05em;
  padding: .1rem .35rem .4rem;
  border-bottom: 1px solid var(--border);
}
.tool-menu-group { padding: .4rem 0; }
.tool-menu-group + .tool-menu-group { border-top: 1px solid var(--border); }
.tool-menu-title {
  display: block; font-weight: 700; color: var(--text);
  margin-bottom: .25rem; font-size: .85rem; padding: .2rem .35rem;
  border-radius: 6px; transition: color .15s;
}
.tool-menu-title.active { color: var(--accent-dark); }
.tool-submenu { display: grid; gap: .15rem; }
.tool-submenu-link {
  display: block; padding: .28rem .55rem; border-radius: 6px;
  color: var(--muted); font-size: .82rem;
  transition: background .15s, color .15s;
}
.tool-submenu-link:hover { background: var(--accent-light); color: var(--accent-dark); text-decoration: none; }
.tool-submenu-link.active { background: var(--accent); color: #fff; text-decoration: none; }

/* ── Compare page ───────────────────────────────────────────── */
.compare-page { padding-top: 0; }
.compare-toolbar {
  position: sticky; top: .6rem; z-index: 12;
  background: color-mix(in oklab, var(--surface) 95%, var(--bg));
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: .8rem 1rem; margin-bottom: .75rem; box-shadow: var(--shadow);
}
.compare-toolbar-group { display: flex; flex-wrap: wrap; gap: .4rem; }
.compare-toolbar-group + .compare-toolbar-group { margin-top: .55rem; }
.compare-toggles label {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .88rem; color: var(--muted); cursor: pointer;
}
.compare-editors { display: grid; gap: 1rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.compare-pane h2 { margin: 0 0 .5rem; font-size: 1rem; }
.compare-editor-shell {
  display: grid; grid-template-columns: 60px 1fr;
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  background: var(--bg);
}
.compare-gutter {
  overflow: auto; max-height: 62vh;
  background: color-mix(in oklab, var(--surface) 90%, var(--bg));
  border-right: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.compare-editor-stack { position: relative; overflow: hidden; }
.compare-overlay,
.compare-input {
  margin: 0;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  tab-size: 2; white-space: pre;
}
.compare-overlay {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  overflow: auto; min-height: 62vh; max-height: 62vh;
  color: transparent; background: transparent;
}
.compare-input {
  position: relative; z-index: 2; border: 0;
  background: transparent; color: var(--text); width: 100%;
  min-height: 62vh; max-height: 62vh; resize: none; overflow: auto; border-radius: 0;
}
.cmp-gutter-line, .cmp-overlay-line { height: 1.5em; line-height: 1.5em; }
.cmp-gutter-line { display: flex; align-items: center; padding: 0 .35rem; color: var(--muted); }
.cmp-marker { width: 4px; height: 1.1em; border-radius: 999px; margin-right: .4rem; background: transparent; }
.cmp-line-no { font-size: .79rem; }
.cmp-overlay-line { padding: 0 .75rem; }
.cmp-added    { background: rgba(14,173,105,.2); }
.cmp-removed  { background: rgba(214,69,69,.2); }
.cmp-modified { background: rgba(217,153,26,.2); }
.cmp-gutter-line.cmp-added    .cmp-marker { background: #0ead69; }
.cmp-gutter-line.cmp-removed  .cmp-marker { background: #d64545; }
.cmp-gutter-line.cmp-modified .cmp-marker { background: #d9991a; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 820px) {
  .header-inner { flex-direction: column; align-items: flex-start; }
  .nav-links { gap: .2rem; }
  .compare-editors { grid-template-columns: 1fr; }
  .compare-input, .compare-overlay, .compare-gutter { max-height: 42vh; min-height: 42vh; }
  .page-layout { display: block; }
  .tool-sidebar-wrap {
    position: relative !important;
    top: 0 !important;
    height: auto !important;
    width: 100% !important;
    overflow: visible;
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: .3rem .75rem;
  }
  .page-layout.sidebar-open .tool-sidebar-wrap { width: 100% !important; }
  .tool-menu-toggle { width: auto; padding: .42rem .75rem; }
  .tool-menu-toggle .menu-label { display: inline; }
  .tool-sidebar {
    position: absolute;
    top: 100%; left: 0;
    width: min(280px, calc(100vw - 2rem));
    max-height: min(65vh, 500px);
    overflow-y: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
    padding: 1rem;
    margin-top: 4px;
  }
  .premium-hero { padding: 1.75rem 1.25rem; }
  .split-workspace { grid-template-columns: 1fr; }
  .split-workspace textarea,
  .split-workspace pre.output { min-height: 240px; }
}