/* ============================================================
   TOOLSBOX — Shared Stylesheet
   Used by all 30 tools. Link from every HTML page:
   <link rel="stylesheet" href="../assets/style.css">
   (or "assets/style.css" from index.html)
   ============================================================ */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600&display=swap');

/* ── Design Tokens ── */
:root {
  --bg:          #0d0d0f;
  --bg2:         #131316;
  --surface:     #17171b;
  --surface2:    #1e1e24;
  --surface3:    #25252d;
  --border:      rgba(255,255,255,0.07);
  --border2:     rgba(255,255,255,0.12);

  --accent:      #e8c547;
  --accent-dim:  rgba(232,197,71,0.12);
  --accent-glow: rgba(232,197,71,0.20);

  --text:        #f0ede8;
  --text2:       #a09e9a;
  --text3:       #5e5c58;

  --calc-color:  #e8c547;
  --text-color:  #7b9cfa;

  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   20px;

  --font-body:   'DM Sans', sans-serif;
  --font-display:'DM Serif Display', serif;

  --nav-h:       60px;
  --shadow:      0 20px 60px rgba(0,0,0,0.45);
  --shadow-sm:   0 4px 16px rgba(0,0,0,0.3);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Background Grid Pattern ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(232,197,71,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232,197,71,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
}

/* ── Top Glow Orb ── */
body::after {
  content: '';
  position: fixed;
  top: -280px;
  right: -180px;
  width: 640px;
  height: 640px;
  background: radial-gradient(circle, rgba(232,197,71,0.06) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

/* ── Navigation ── */
#tb-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(13,13,15,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 0;
}

.tb-nav-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Logo */
.tb-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  margin-right: 16px;
  flex-shrink: 0;
}

.tb-logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #0d0d0f;
  letter-spacing: -0.5px;
  font-family: var(--font-display);
}

.tb-logo-text {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.3px;
}

.tb-logo-text em {
  font-style: italic;
  color: var(--accent);
}

/* Nav links */
.tb-nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.tb-nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.tb-nav-link:hover {
  color: var(--text);
  background: var(--surface2);
}

.tb-nav-link.active {
  color: var(--accent);
  background: var(--accent-dim);
}

.tb-nav-link .nav-icon { font-size: 14px; }

/* Nav right side */
.tb-nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* Mobile hamburger */
.tb-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  margin-left: auto;
}

.tb-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text2);
  border-radius: 2px;
  transition: all 0.2s;
}

/* Mobile menu */
.tb-mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 20px;
  z-index: 99;
  flex-direction: column;
  gap: 4px;
}

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

.tb-mobile-menu .tb-nav-link {
  padding: 10px 14px;
  font-size: 15px;
}

/* ── Breadcrumb ── */
.tb-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text3);
  padding: 14px 0 0;
  flex-wrap: wrap;
}

.tb-breadcrumb a {
  color: var(--text3);
  text-decoration: none;
  transition: color 0.15s;
}

.tb-breadcrumb a:hover { color: var(--text2); }
.tb-breadcrumb .sep { color: var(--text3); }
.tb-breadcrumb .current { color: var(--text2); }

/* ── Main Content Wrapper ── */
.tb-main {
  flex: 1;
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.tb-main.wide {
  max-width: 1100px;
}

/* ── Page Header ── */
.tb-page-header {
  text-align: center;
  margin-bottom: 36px;
  animation: tb-fadeDown 0.55s ease both;
}

.tb-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--accent-dim);
  border: 1px solid rgba(232,197,71,0.22);
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 18px;
}

.tb-badge.blue {
  background: rgba(123,156,250,0.12);
  border-color: rgba(123,156,250,0.25);
  color: #7b9cfa;
}

.tb-page-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 52px);
  line-height: 1.07;
  color: var(--text);
  margin-bottom: 12px;
}

.tb-page-title em {
  font-style: italic;
  color: var(--accent);
}

.tb-page-title.blue em { color: #7b9cfa; }

.tb-page-subtitle {
  color: var(--text2);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.65;
  max-width: 480px;
  margin: 0 auto;
}

/* ── Card ── */
.tb-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow);
  animation: tb-fadeUp 0.6s ease 0.1s both;
}

.tb-card + .tb-card { margin-top: 16px; }

.tb-card-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 16px;
}

/* ── Form Elements ── */
.tb-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 7px;
}

.tb-input,
.tb-select,
.tb-textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  color-scheme: dark;
}

.tb-input:focus,
.tb-select:focus,
.tb-textarea:focus {
  border-color: rgba(232,197,71,0.45);
  box-shadow: 0 0 0 3px rgba(232,197,71,0.07);
}

.tb-input.blue:focus,
.tb-select.blue:focus,
.tb-textarea.blue:focus {
  border-color: rgba(123,156,250,0.45);
  box-shadow: 0 0 0 3px rgba(123,156,250,0.07);
}

.tb-textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.tb-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235e5c58' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
  cursor: pointer;
}

.tb-field { margin-bottom: 18px; }
.tb-field:last-child { margin-bottom: 0; }

.tb-row {
  display: grid;
  gap: 14px;
}

.tb-row.col2 { grid-template-columns: 1fr 1fr; }
.tb-row.col3 { grid-template-columns: 1fr 1fr 1fr; }

/* ── Buttons ── */
.tb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.12s, box-shadow 0.15s, background 0.15s;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.tb-btn:hover  { transform: translateY(-1px); }
.tb-btn:active { transform: translateY(0); }

.tb-btn.primary {
  background: var(--accent);
  color: #0d0d0f;
  width: 100%;
}

.tb-btn.primary:hover {
  background: #f0d060;
  box-shadow: 0 8px 24px rgba(232,197,71,0.22);
}

.tb-btn.primary.blue {
  background: #7b9cfa;
  color: #0d0d0f;
}

.tb-btn.primary.blue:hover {
  background: #9ab4fc;
  box-shadow: 0 8px 24px rgba(123,156,250,0.22);
}

.tb-btn.secondary {
  background: var(--surface2);
  color: var(--text2);
  border: 1px solid var(--border);
}

.tb-btn.secondary:hover {
  background: var(--surface3);
  color: var(--text);
  border-color: var(--border2);
}

.tb-btn.ghost {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
}

.tb-btn.ghost:hover {
  background: var(--surface2);
  color: var(--text);
}

.tb-btn.sm {
  padding: 8px 14px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.tb-btn-row {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.tb-btn-row .tb-btn { flex: 1; }

/* ── Result Box ── */
.tb-result {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
  margin-top: 24px;
}

.tb-result.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.tb-result-hero {
  background: linear-gradient(135deg, var(--accent-dim) 0%, rgba(232,197,71,0.05) 100%);
  border: 1px solid rgba(232,197,71,0.18);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  text-align: center;
  margin-bottom: 14px;
  position: relative;
  overflow: hidden;
}

.tb-result-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232,197,71,0.35), transparent);
}

.tb-result-hero.blue {
  background: linear-gradient(135deg, rgba(123,156,250,0.1) 0%, rgba(123,156,250,0.04) 100%);
  border-color: rgba(123,156,250,0.2);
}

.tb-result-hero.blue::before {
  background: linear-gradient(90deg, transparent, rgba(123,156,250,0.35), transparent);
}

.tb-result-big {
  font-family: var(--font-display);
  font-size: clamp(44px, 10vw, 68px);
  line-height: 1;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}

.tb-result-big.blue { color: #7b9cfa; }

.tb-result-label {
  color: var(--text2);
  font-size: 13px;
  font-weight: 500;
}

.tb-result-sub {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text);
  opacity: 0.8;
}

/* ── Stats Grid ── */
.tb-stats {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
}

.tb-stats.col2 { grid-template-columns: 1fr 1fr; }
.tb-stats.col3 { grid-template-columns: repeat(3, 1fr); }
.tb-stats.col4 { grid-template-columns: repeat(4, 1fr); }

.tb-stat {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  text-align: center;
  transition: border-color 0.2s;
}

.tb-stat:hover { border-color: rgba(232,197,71,0.18); }

.tb-stat-val {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--text);
  display: block;
  line-height: 1.15;
}

.tb-stat-key {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-top: 4px;
  display: block;
}

/* ── Error / Alert ── */
.tb-error {
  display: none;
  background: rgba(227,75,74,0.1);
  border: 1px solid rgba(227,75,74,0.25);
  color: #f08080;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-top: 10px;
}

.tb-error.show { display: block; }

.tb-info {
  background: rgba(123,156,250,0.08);
  border: 1px solid rgba(123,156,250,0.18);
  color: #7b9cfa;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-top: 10px;
}

/* ── Related Tools ── */
.tb-related { margin-top: 36px; }

.tb-related-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 12px;
}

.tb-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.tb-related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.18s, transform 0.15s;
  display: block;
}

.tb-related-card:hover {
  border-color: rgba(232,197,71,0.22);
  transform: translateY(-2px);
}

.tb-related-icon {
  font-size: 18px;
  display: block;
  margin-bottom: 6px;
}

.tb-related-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  display: block;
}

.tb-related-desc {
  font-size: 11px;
  color: var(--text3);
  margin-top: 2px;
  display: block;
}

/* ── Footer ── */
#tb-footer {
  position: relative;
  z-index: 1;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 40px 24px 32px;
  margin-top: auto;
}

.tb-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
}

.tb-footer-brand .tb-logo { margin-bottom: 10px; }

.tb-footer-desc {
  font-size: 13px;
  color: var(--text3);
  line-height: 1.65;
  margin-top: 8px;
  max-width: 220px;
}

.tb-footer-col-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 12px;
}

.tb-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tb-footer-links a {
  font-size: 13px;
  color: var(--text2);
  text-decoration: none;
  transition: color 0.15s;
}

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

.tb-footer-bottom {
  max-width: 1100px;
  margin: 28px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.tb-footer-copy {
  font-size: 12px;
  color: var(--text3);
}

.tb-footer-copy a {
  color: var(--accent);
  text-decoration: none;
}

/* ── Animations ── */
@keyframes tb-fadeDown {
  from { opacity: 0; transform: translateY(-18px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes tb-fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes tb-fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Utility Classes ── */
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }

.text-center { text-align: center; }
.text-muted  { color: var(--text2); font-size: 13px; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .tb-nav-links { display: none; }
  .tb-hamburger { display: flex; }

  .tb-main { padding: 24px 16px 60px; }
  .tb-card { padding: 22px 18px; }

  .tb-row.col2,
  .tb-row.col3 { grid-template-columns: 1fr; }

  .tb-stats.col3,
  .tb-stats.col4 { grid-template-columns: 1fr 1fr; }

  .tb-related-grid { grid-template-columns: 1fr 1fr; }

  .tb-footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; }
  .tb-footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .tb-page-title { font-size: 30px; }
  .tb-stats.col2 { grid-template-columns: 1fr 1fr; }
  .tb-related-grid { grid-template-columns: repeat(3, 1fr); }
  .tb-btn-row { flex-direction: column; }
  .tb-footer-inner { grid-template-columns: 1fr; }
}