/* =========================================================================
   Conta parole — stile (mobile-first, tema chiaro/scuro)
   ========================================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1120px;
  --accent: #34cf8f;
  --accent-2: #5fe0ad;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SFMono-Regular', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;
}

/* Tema scuro (default) */
:root,
:root[data-theme='dark'] {
  --bg: #243140;
  --bg-grad-1: #2b3a4d;
  --bg-grad-2: #1f2a37;
  --panel: #2f3e50;
  --panel-2: #36465a;
  --surface: #1c2530;
  --text: #eef3f8;
  --text-dim: #aab8c7;
  --border: rgba(255, 255, 255, 0.09);
  --badge-bg: var(--accent);
  --badge-text: #fff;
  --shadow: 0 18px 40px -22px rgba(0, 0, 0, 0.65);
}

/* Tema chiaro */
:root[data-theme='light'] {
  --bg: #eef2f6;
  --bg-grad-1: #f4f7fa;
  --bg-grad-2: #e3e9f0;
  --panel: #ffffff;
  --panel-2: #f5f8fb;
  --surface: #ffffff;
  --text: #1d2733;
  --text-dim: #5a6b7b;
  --border: rgba(20, 35, 55, 0.12);
  --badge-bg: var(--accent);
  --badge-text: #fff;
  --shadow: 0 16px 36px -24px rgba(31, 50, 75, 0.35);
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: linear-gradient(160deg, var(--bg-grad-1), var(--bg-grad-2));
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

a {
  color: var(--accent-2);
}

/* ---------- Header ---------- */
.site-header {
  padding-top: clamp(20px, 4vw, 34px);
  padding-bottom: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-size: clamp(1.5rem, 1rem + 2.4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand__logo {
  display: grid;
  place-items: center;
  width: 1.5em;
  height: 1.5em;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 0.62em;
  font-weight: 800;
  box-shadow: 0 6px 16px -6px rgba(52, 207, 143, 0.7);
}

.tagline {
  margin: 2px 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  width: 100%;
}

/* ---------- Layout principale ---------- */
.app {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.5vw, 24px);
  margin-top: clamp(18px, 3vw, 28px);
}

@media (min-width: 900px) {
  .app {
    grid-template-columns: minmax(0, 1fr) clamp(260px, 24vw, 320px);
    align-items: start;
  }
}

/* ---------- Editor ---------- */
.editor-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}

.toolbar__spacer {
  flex: 1 1 auto;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-width: 44px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

.tool-btn svg {
  width: 20px;
  height: 20px;
  flex: none;
}

.tool-btn:hover:not(:disabled) {
  background: color-mix(in srgb, var(--text) 10%, transparent);
}

.tool-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.tool-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.tool-btn.is-copied {
  color: #fff;
  background: #2e9e5b;
}

.btn-label {
  font-size: 0.9rem;
}

.editor {
  display: block;
  width: 100%;
  border: 0;
  outline: 0;
  resize: vertical;
  padding: clamp(16px, 2.5vw, 22px);
  min-height: 44vh;
  background: transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 16px; /* ≥16px: evita lo zoom automatico iOS */
  line-height: 1.65;
}

@media (min-width: 900px) {
  .editor {
    min-height: 60vh;
  }
}

.editor::placeholder {
  color: var(--text-dim);
  opacity: 0.8;
}

/* ---------- Pannello statistiche ---------- */
.panel {
  display: grid;
  gap: clamp(16px, 2.5vw, 22px);
}

@media (min-width: 900px) {
  .panel {
    position: sticky;
    top: 18px;
  }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(16px, 2.2vw, 20px);
}

.card__title {
  margin: 0 0 14px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.stat {
  display: flex;
  align-items: center;
  gap: 12px;
}

.stat__value {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.4em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.95rem;
  white-space: nowrap;
}

.stat__label {
  color: var(--text);
  font-size: 0.97rem;
}

.stat__band {
  display: block;
  color: var(--text-dim);
  font-size: 0.82rem;
}

/* ---------- Limiti social ---------- */
.limits {
  display: grid;
  gap: 14px;
}

.limit__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}

.limit__name {
  font-size: 0.92rem;
  font-weight: 600;
}

.limit__value {
  font-variant-numeric: tabular-nums;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.limit__bar {
  height: 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 12%, transparent);
  overflow: hidden;
}

.limit__bar span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.2s ease;
}

.limit.is-over .limit__value {
  color: #ff6b5b;
  font-weight: 700;
}

.limit.is-over .limit__bar span {
  background: #ff5747;
}

/* ---------- Parole chiave ---------- */
.keyword-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.keyword-head .card__title {
  margin: 0;
}

.ngram-toggle {
  display: inline-flex;
  gap: 4px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
}

.ngram-toggle button {
  min-width: 38px;
  min-height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
}

.ngram-toggle button[aria-pressed='true'] {
  background: var(--accent);
  color: #fff;
}

.keyword-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.keyword-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 11px;
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  font-size: 0.92rem;
}

.keyword-phrase {
  overflow-wrap: anywhere;
}

.keyword-count {
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.keyword-empty {
  justify-content: flex-start !important;
  color: var(--text-dim);
  background: transparent !important;
}

/* ---------- Contenuto SEO ---------- */
.content {
  margin: clamp(40px, 7vw, 72px) 0 0;
}

.content section {
  margin-bottom: clamp(28px, 5vw, 44px);
}

.content h2 {
  font-size: clamp(1.3rem, 1rem + 1.4vw, 1.75rem);
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}

.content h3 {
  font-size: 1.08rem;
  margin: 22px 0 6px;
}

.content p,
.content li {
  color: var(--text-dim);
  max-width: 72ch;
}

.content ul {
  padding-left: 1.2em;
}

.content pre {
  margin: 0 0 14px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
}

.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 0.92rem;
}

.content th,
.content td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.content th {
  background: var(--panel-2);
  color: var(--text);
  font-weight: 700;
}

.content td {
  color: var(--text-dim);
}

.content table {
  display: block;
  overflow-x: auto;
}

.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 16px;
  margin-bottom: 10px;
  background: var(--panel);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  padding: 12px 0;
  list-style: none;
}

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

.faq summary::after {
  content: '+';
  float: right;
  font-weight: 700;
  color: var(--accent-2);
}

.faq details[open] summary::after {
  content: '–';
}

.faq details p {
  margin-top: 0;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: clamp(36px, 6vw, 60px);
  padding: 28px 0;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.9rem;
  text-align: center;
}

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

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}