/* ============================================================
   TextTools — Shared Stylesheet
   Font: Inter 18px base | Accent: #4F46E5 | Light + Dark mode
   ============================================================ */

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

/* ============================================================
   CSS VARIABLES — Light mode (default)
   ============================================================ */
:root {
  --bg-page:       #F0F2F5;
  --bg-card:       #ffffff;
  --bg-input:      #FAFAFA;
  --bg-input-focus:#ffffff;
  --bg-stat:       #F9FAFB;
  --bg-sidebar:    #ffffff;
  --bg-nav:        #ffffff;
  --bg-hover:      #F3F4F6;
  --bg-active:     #EEF2FF;
  --bg-mobile-menu:#ffffff;
  --bg-footer:     #ffffff;
  --bg-social:     #F9FAFB;
  --bg-bar:        #E5E7EB;

  --text-primary:  #111827;
  --text-secondary:#374151;
  --text-muted:    #6B7280;
  --text-faint:    #9CA3AF;
  --text-placeholder:#D1D5DB;
  --text-hint:     #C4C9D4;

  --border:        #E5E7EB;
  --border-light:  #F3F4F6;
  --border-ad:     #CBD5E1;

  --accent:        #4F46E5;
  --accent-hover:  #4338CA;
  --accent-bg:     #EEF2FF;
  --accent-bg2:    #F5F3FF;

  --btn-sec-bg:    #ffffff;
  --btn-sec-text:  #374151;
  --btn-sec-border:#E5E7EB;
  --btn-sec-hover: #F9FAFB;

  --color-ok:      #10B981;
  --color-warn:    #F59E0B;
  --color-over:    #EF4444;

  --shadow-card:   none;
  --icon-color:    #6B7280;
  --icon-active:   #4F46E5;
  --ad-text:       #94A3B8;
}

/* ============================================================
   CSS VARIABLES — Dark mode
   ============================================================ */
[data-theme="dark"] {
  --bg-page:       #0F1117;
  --bg-card:       #1A1D27;
  --bg-input:      #13151E;
  --bg-input-focus:#13151E;
  --bg-stat:       #13151E;
  --bg-sidebar:    #1A1D27;
  --bg-nav:        #1A1D27;
  --bg-hover:      #22263A;
  --bg-active:     #1E2040;
  --bg-mobile-menu:#1A1D27;
  --bg-footer:     #1A1D27;
  --bg-social:     #13151E;
  --bg-bar:        #2A2D3E;

  --text-primary:  #F5F6FA;
  --text-secondary:#DDE0EE;
  --text-muted:    #B0B6D0;
  --text-faint:    #7A80A0;
  --text-placeholder:#4A4F6A;
  --text-hint:     #4A4F6A;

  --border:        #2A2D3E;
  --border-light:  #22263A;
  --border-ad:     #2A2D3E;

  --accent:        #818CF8;
  --accent-hover:  #A5B4FC;
  --accent-bg:     #1E2040;
  --accent-bg2:    #1A1D35;

  --btn-sec-bg:    #22263A;
  --btn-sec-text:  #DDE0EE;
  --btn-sec-border:#2A2D3E;
  --btn-sec-hover: #2A2D3E;

  --color-ok:      #34D399;
  --color-warn:    #FBBF24;
  --color-over:    #F87171;

  --shadow-card:   0 1px 3px rgba(0,0,0,0.4);
  --icon-color:    #5A5F78;
  --icon-active:   #6366F1;
  --ad-text:       #3A3E55;
}

/* Auto dark mode dal sistema (solo se nessun attributo manuale) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --bg-page:       #0F1117;
    --bg-card:       #1A1D27;
    --bg-input:      #13151E;
    --bg-input-focus:#13151E;
    --bg-stat:       #13151E;
    --bg-sidebar:    #1A1D27;
    --bg-nav:        #1A1D27;
    --bg-hover:      #22263A;
    --bg-active:     #1E2040;
    --bg-mobile-menu:#1A1D27;
    --bg-footer:     #1A1D27;
    --bg-social:     #13151E;
    --bg-bar:        #2A2D3E;
    --text-primary:  #F5F6FA;
    --text-secondary:#DDE0EE;
    --text-muted:    #B0B6D0;
    --text-faint:    #7A80A0;
    --text-placeholder:#4A4F6A;
    --text-hint:     #4A4F6A;
    --border:        #2A2D3E;
    --border-light:  #22263A;
    --border-ad:     #2A2D3E;
    --accent:        #818CF8;
    --accent-hover:  #A5B4FC;
    --accent-bg:     #1E2040;
    --accent-bg2:    #1A1D35;
    --btn-sec-bg:    #22263A;
    --btn-sec-text:  #DDE0EE;
    --btn-sec-border:#2A2D3E;
    --btn-sec-hover: #2A2D3E;
    --color-ok:      #34D399;
    --color-warn:    #FBBF24;
    --color-over:    #F87171;
    --shadow-card:   0 1px 3px rgba(0,0,0,0.4);
    --icon-color:    #5A5F78;
    --icon-active:   #6366F1;
    --ad-text:       #3A3E55;
  }
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 20px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.2s, border-color 0.2s;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
  gap: 16px;
}

.navbar-logo {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.4px;
  white-space: nowrap;
  text-decoration: none;
}

.navbar-logo span {
  color: var(--accent);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.navbar-links::-webkit-scrollbar { display: none; }

.navbar-links a {
  font-size: 0.83rem;
  font-weight: 400;
  color: var(--text-muted);
  padding: 6px 11px;
  border-radius: 7px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

.navbar-links a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.navbar-links a.active {
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 500;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Theme toggle — switch a due facce */
.theme-switch {
  display: flex;
  align-items: center;
  background: var(--bg-stat);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s;
}

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

.theme-switch-side {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 30px;
  transition: background 0.2s;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.theme-switch-side svg {
  width: 15px;
  height: 15px;
  stroke: var(--text-faint);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.2s;
}

.theme-switch-side.active {
  background: var(--accent-bg);
}

.theme-switch-side.active svg {
  stroke: var(--accent);
}

.theme-switch-divider {
  width: 1px;
  height: 16px;
  background: var(--border);
  flex-shrink: 0;
}

.lang-selector {
  font-size: 0.78rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 5px 11px;
  border-radius: 7px;
  background: var(--bg-card);
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.15s;
  color: var(--text-secondary);
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-secondary);
}

.nav-toggle svg {
  display: block;
  width: 22px;
  height: 22px;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--bg-mobile-menu);
  border-top: 1px solid var(--border);
  padding: 10px 20px 14px;
  gap: 2px;
}

.mobile-menu a {
  font-size: 0.94rem;
  color: var(--text-secondary);
  padding: 9px 12px;
  border-radius: 7px;
  text-decoration: none;
  display: block;
  transition: background 0.12s;
}

.mobile-menu a:hover { background: var(--bg-hover); }

.mobile-menu a.active {
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 500;
}

.mobile-menu.open { display: flex; }

/* ============================================================
   AD SLOTS
   ============================================================ */
.ad-slot {
  background: var(--bg-card);
  border: 1.5px dashed var(--border-ad);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ad-text);
  font-size: 0.67rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

/* Leaderboard 728×90 — top e bottom */
.ad-slot-top {
  height: 90px;
  width: 100%;
  max-width: 728px;
  margin: 14px auto;
}

.ad-slot-bottom {
  height: 90px;
  width: 100%;
  max-width: 728px;
  margin: 20px auto 0;
}

/* Half Page 300×600 — sidebar principale */
.ad-slot-sidebar {
  width: 100%;
  height: 600px;
}

/* Large Rectangle 336×280 — in-content */
.ad-slot-rectangle {
  width: 100%;
  max-width: 336px;
  height: 280px;
  margin: 0 auto;
}

/* Medium Rectangle 300×250 — sotto SEO block */
.ad-slot-medium {
  width: 100%;
  max-width: 300px;
  height: 250px;
  margin: 20px auto 0;
}

/* Mobile Banner 320×100 — solo mobile */
.ad-slot-mobile {
  display: none;
  width: 100%;
  max-width: 320px;
  height: 100px;
  margin: 0 auto;
}

@media (max-width: 600px) {
  .ad-slot-top,
  .ad-slot-bottom {
    height: 100px;
    max-width: 320px;
  }

  .ad-slot-mobile {
    display: flex;
  }

  .ad-slot-sidebar {
    height: 250px;
    max-width: 300px;
  }
}

/* ============================================================
   MAIN LAYOUT
   ============================================================ */
.main-content {
  flex: 1;
  padding: 0 0 40px;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
  align-items: start;
}

.content-main { min-width: 0; }

.content-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 78px;
}

/* ============================================================
   TOOL CARD
   ============================================================ */
.tool-card {
  margin-top: 18px;
  background: var(--bg-card);
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: background 0.2s, border-color 0.2s;
}

.tool-card-header {
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--border-light);
}

.tool-card-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.tool-card-desc {
  font-size: 0.83rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.5;
}

/* Tabs */
.tool-tabs {
  display: flex;
  gap: 4px;
  padding: 16px 24px 0;
  border-bottom: 1px solid var(--border-light);
  overflow-x: auto;
  scrollbar-width: none;
}

.tool-tabs::-webkit-scrollbar { display: none; }

.tool-tab {
  font-size: 0.83rem;
  font-weight: 400;
  color: var(--text-muted);
  padding: 7px 14px;
  border-radius: 7px 7px 0 0;
  cursor: pointer;
  border: 1px solid transparent;
  border-bottom: none;
  background: transparent;
  font-family: 'Inter', sans-serif;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.tool-tab:hover {
  color: var(--text-primary);
  background: var(--bg-stat);
}

.tool-tab.active {
  color: var(--accent);
  background: var(--accent-bg2);
  border-color: var(--border);
  font-weight: 500;
}

/* Textarea */
.tool-body { padding: 20px 24px; }

.textarea-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-faint);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

.tool-textarea {
  width: 100%;
  min-height: 280px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  resize: vertical;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.2s;
  background: var(--bg-input);
}

.tool-textarea:focus {
  border-color: var(--accent);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.tool-textarea::placeholder { color: var(--text-placeholder); }

.tool-textarea.output {
  background: var(--bg-stat);
  cursor: default;
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 10px;
  padding: 0 24px 18px;
}

.stat-card {
  background: var(--bg-stat);
  border-radius: 10px;
  padding: 12px 14px;
  text-align: center;
  transition: background 0.2s;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.67rem;
  color: var(--text-faint);
  margin-top: 2px;
  letter-spacing: 0.3px;
}

/* Actions */
.tool-actions {
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.83rem;
  font-weight: 500;
  padding: 9px 18px;
  border-radius: 8px;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

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

.btn-secondary {
  background: var(--btn-sec-bg);
  color: var(--btn-sec-text);
  border: 1px solid var(--btn-sec-border);
}

.btn-secondary:hover {
  background: var(--btn-sec-hover);
  border-color: var(--border);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 9px 12px;
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.copy-toast {
  display: none;
  font-size: 0.78rem;
  color: var(--color-ok);
  font-weight: 500;
  margin-left: auto;
}

.copy-toast.show { display: inline; }

/* ============================================================
   SIDEBAR — Tools Navigation
   ============================================================ */
.sidebar-tools {
  background: var(--bg-sidebar);
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: background 0.2s, border-color 0.2s;
}

.sidebar-tools-title {
  font-size: 0.67rem;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 0.7px;
  text-transform: uppercase;
  padding: 16px 18px 8px;
}

.sidebar-tool-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  cursor: pointer;
  border-left: 2px solid transparent;
  text-decoration: none;
  transition: background 0.12s;
}

.sidebar-tool-item:hover { background: var(--bg-hover); }

.sidebar-tool-item.active {
  border-left-color: var(--accent);
  background: var(--accent-bg2);
}

.sidebar-tool-icon {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--icon-color);
  flex-shrink: 0;
}

.sidebar-tool-item.active .sidebar-tool-icon {
  background: var(--accent-bg);
  color: var(--icon-active);
}

.sidebar-tool-name {
  font-size: 0.83rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.sidebar-tool-item.active .sidebar-tool-name {
  color: var(--accent);
  font-weight: 500;
}

/* ============================================================
   SEO TEXT BLOCK
   ============================================================ */
.seo-block {
  background: var(--bg-card);
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 28px;
  margin-top: 20px;
  box-shadow: var(--shadow-card);
  transition: background 0.2s, border-color 0.2s;
}

.seo-block h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  margin-bottom: 10px;
}

.seo-block p {
  font-size: 0.89rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 10px;
}

.seo-block p:last-child { margin-bottom: 0; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border);
  padding: 24px 20px;
  text-align: center;
  transition: background 0.2s, border-color 0.2s;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
}

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

.footer-copy {
  font-size: 0.72rem;
  color: var(--text-faint);
}

/* ============================================================
   RESPONSIVE — Tablet
   ============================================================ */
@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; }

  .content-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .ad-slot-sidebar {
    width: 100%;
    max-width: 400px;
    height: 120px;
    margin: 0 auto;
  }

  .sidebar-tools { width: 100%; }

  .navbar-links { display: none; }

  .nav-toggle { display: block; }
}

/* ============================================================
   RESPONSIVE — Mobile
   ============================================================ */
@media (max-width: 600px) {
  html { font-size: 19px; }

  .tool-card-header { padding: 18px 18px 14px; }

  .tool-body { padding: 16px 18px; }

  .tool-textarea { min-height: 220px; }

  .stats-row {
    padding: 0 18px 14px;
    grid-template-columns: repeat(3, 1fr);
  }

  .tool-actions { padding: 14px 18px; }

  .seo-block { padding: 22px 18px; }

  .ad-slot-top,
  .ad-slot-bottom { height: 70px; }

  .btn { padding: 9px 14px; }
}

@media (max-width: 400px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}