/* ============================================================
   PRO UNIT CONVERTER — PREMIUM UI THEME
   Modern, clean, colorful, accessible — ready for production
   Includes: responsive layout, dark mode, animations, tool cards,
   converter form styles, buttons, footer and utility classes.
============================================================ */

:root{
  /* Palette */
  --bg: #f5f7fb;
  --surface: #ffffff;
  --muted: #6b7280;
  --text: #0f172a;
  --accent: linear-gradient(135deg,#ff6f61,#ff9966);
  --accent-solid: #ff6f61;

  /* Cards & UI */
  --card: #ffffff;
  --radius: 14px;
  --glass: rgba(255,255,255,0.6);
  --shadow-sm: 0 4px 14px rgba(2,6,23,0.06);
  --shadow-lg: 0 12px 40px rgba(2,6,23,0.12);

  /* Sizes */
  --container-w: 1180px;
  --gap: 18px;

  /* Accent colors */
  --blue: #42a5f5; --red: #ef5350; --purple: #ab47bc; --teal: #26a69a;
  --orange: #fb8c00; --green: #66bb6a; --indigo: #5c6bc0; --cyan: #00bcd4;
  --yellow: #fdd835; --pink: #ec407a; --darkblue: #1e3a8a;
  --grey: #90a4ae; --muted-2:#98a1b3;

  /* Utility */
  --transition: 200ms cubic-bezier(.2,.8,.2,1);
}

/* Dark mode overrides */
body.dark{
  --bg:#071022;
  --surface:#0f1724;
  --card:#0b1220;
  --text:#e6eef8;
  --muted:#9aa8c0;
  --glass: rgba(255,255,255,0.03);
  --shadow-sm: 0 6px 18px rgba(0,0,0,0.6);
  --shadow-lg: 0 18px 60px rgba(0,0,0,0.7);
}

/* ------------------ Base ------------------ */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;padding:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  transition:background var(--transition), color var(--transition);
}

.container{
  width:calc(100% - 40px);
  max-width:var(--container-w);
  margin:0 auto;
  padding:28px 20px;
}

a{color:inherit}

h1{font-size:28px;line-height:1.08}
h2{font-size:20px}
h3{font-size:16px}
p{color:var(--muted);margin:0}

/* ------------------ Header ------------------ */
.site-header{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 20px;border-radius:12px;
  background:linear-gradient(180deg,rgba(255,255,255,0.5),rgba(255,255,255,0.35));
  backdrop-filter:blur(6px);box-shadow:var(--shadow-sm);position:sticky;top:12px;z-index:40;margin:16px 20px 0;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand img{width:44px;height:44px;border-radius:10px;object-fit:cover}
.brand span{font-weight:700;color:var(--accent-solid)}

.site-header .controls{display:flex;gap:10px;align-items:center}
.btn{appearance:none;border:0;background:transparent;padding:8px 12px;border-radius:10px;cursor:pointer;transition:all var(--transition);font-weight:600}
.btn.primary{background:var(--accent);color:#fff;padding:10px 14px;box-shadow:var(--shadow-sm)}
.btn.ghost{border:1px solid rgba(0,0,0,0.06);background:transparent}
.btn.toggle{width:44px;height:38px;display:inline-flex;align-items:center;justify-content:center}

/* ------------------ Breadcrumb ------------------ */
.breadcrumb{font-size:13px;color:var(--muted);margin:18px 20px}
.breadcrumb a{color:var(--accent-solid);text-decoration:none}

/* ------------------ Hero ------------------ */
.hero{margin:18px 0 8px;text-align:center}
.hero .title{font-size:34px;margin-bottom:8px}
.hero .subtitle{max-width:880px;margin:0 auto;color:var(--muted)}

/* ------------------ Cards & Grid ------------------ */
.card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);margin-bottom:22px}
.section-title{font-size:18px;margin-bottom:12px}

.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--gap)}

/* Tool square */
.tool{position:relative;overflow:hidden;border-radius:14px;padding:18px;background:linear-gradient(180deg,var(--card),rgba(0,0,0,0.02));display:flex;flex-direction:column;justify-content:space-between;height:220px;transition:transform var(--transition), box-shadow var(--transition)}
.tool:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.tool h3{font-size:18px;margin-bottom:6px}
.tool p{font-size:14px;color:var(--muted)}
.tool a{color:inherit;text-decoration:none}
.tool::after{content:"";position:absolute;left:0;top:0;height:100%;width:8px;background:var(--accent-solid);transition:background var(--transition)}

/* color strips */
.blue::after{background:var(--blue)}.red::after{background:var(--red)}.purple::after{background:var(--purple)}.teal::after{background:var(--teal)}.orange::after{background:var(--orange)}.green::after{background:var(--green)}.indigo::after{background:var(--indigo)}.cyan::after{background:var(--cyan)}.pink::after{background:var(--pink)}.gold::after{background:var(--yellow)}

/* tool footer */
.tool .meta{display:flex;align-items:center;gap:10px}
.tool .meta .icon{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,rgba(0,0,0,0.03),rgba(255,255,255,0.02));display:inline-flex;align-items:center;justify-content:center}

/* ------------------ Converter form styles ------------------ */
.converter-box, .converter{display:flex;flex-direction:column;gap:12px}
label{font-weight:600;color:var(--text);font-size:14px}
input[type=number], input[type=text], select{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(15,23,42,0.06);font-size:15px;background:linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.4));transition:box-shadow var(--transition)}
input:focus, select:focus{outline:none;box-shadow:0 6px 18px rgba(99,102,241,0.08)}

.convert-btn{display:inline-block;padding:12px 16px;border-radius:10px;background:var(--accent);color:#fff;border:none;font-weight:700;cursor:pointer}
.convert-btn:hover{opacity:0.98;transform:translateY(-1px)}

.result-box{padding:14px;border-radius:10px;background:linear-gradient(180deg, rgba(0,0,0,0.02), rgba(255,255,255,0.02));border:1px solid rgba(0,0,0,0.04);font-weight:600}

/* small helpers */
.kv{display:flex;justify-content:space-between;align-items:center}
.small{font-size:13px;color:var(--muted)}

/* ------------------ FAQ ------------------ */
.faq-section .faq{margin-bottom:12px}
.faq h3{font-size:15px;margin-bottom:6px}
.faq p{color:var(--muted)}

/* ------------------ Footer ------------------ */
.site-footer{margin-top:36px;padding:22px;border-radius:12px;background:linear-gradient(180deg,var(--card), rgba(0,0,0,0.02));box-shadow:var(--shadow-sm)}
.footer-flex{display:flex;align-items:center;justify-content:space-between;gap:12px}
.site-footer p{color:var(--muted)}
.site-footer a{text-decoration:none;color:var(--accent-solid);font-weight:600}

/* ------------------ Responsive ------------------ */
@media (max-width:900px){
  .container{padding:20px}
  .hero{text-align:left}
  .site-header{margin:12px}
}
@media (max-width:600px){
  .tools-grid{grid-template-columns:repeat(1,1fr)}
  .brand span{display:none}
  .hero .title{font-size:22px}
  .container{padding:14px}
  .site-header{padding:10px}
}

/* ------------------ Accessibility & Print ------------------ */
@media print{body{background:#fff;color:#000} .site-header, .site-footer{display:none}}

/* ------------------ Utility classes ------------------ */
.text-center{text-align:center}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mb-16{margin-bottom:16px}
.hidden{display:none}
/* ================================
   COOKIE BANNER (Option B)
================================ */

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--card);
  padding: 18px 20px;
  box-shadow: 0 -4px 14px rgba(0,0,0,0.12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 9999;
  border-top: 3px solid var(--accent);
  animation: fadeUp 0.4s ease;
}

.cookie-banner p {
  margin: 0;
  font-size: 15px;
  color: var(--text);
}

.cookie-banner a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

#acceptCookies {
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
}

#acceptCookies:hover {
  background: #e65652;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* HIDDEN STATE */
.cookie-banner.hide {
  display: none;
}


/* End of premium theme */