/* -------------------------
   Color & Font System
-------------------------- */
:root {
  --green: #2f5d4e;
  --green-dark: #24483c;
  --light-bg: #f6f3ed;
  --white: #ffffff;
  --text-dark: #2b2b2b;
  --text-muted: #666666;
  --border-soft: #e2ded6;
}

/* -------------------------
   Base Reset
-------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Georgia, "Times New Roman", serif;
  background-color: var(--light-bg);
  color: var(--text-dark);
  line-height: 1.6;
  padding: 2rem 1.25rem;
}

/* -------------------------
   Hero Section
-------------------------- */
.hero {
  text-align: center;
  margin-bottom: 3.5rem;
}

.hero-logo {
  width: 140px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.25;
  color: var(--green);
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* -------------------------
   Calculator Container
-------------------------- */
#calculator {
  max-width: 720px;
  margin: 0 auto;
  background-color: var(--white);
  padding: 2.25rem 2rem;
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
}

/* -------------------------
   Headings
-------------------------- */
#calculator h2 {
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
  color: var(--green);
}

#calculator h3 {
  font-size: 1.15rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-dark);
}

#calculator h4 {
  font-size: 1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

/* -------------------------
   Labels & Inputs
-------------------------- */
label {
  display: block;
  font-size: 0.95rem;
  margin-top: 1rem;
  color: var(--text-dark);
}

select,
input[type="range"] {
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.55rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  font-size: 0.95rem;
}

/* -------------------------
   Checkbox Groups
-------------------------- */
.checkbox-group {
  margin-top: 0.75rem;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  cursor: pointer;
}

input[type="checkbox"] {
  accent-color: var(--green);
}

/* -------------------------
   Range Slider
-------------------------- */
input[type="range"] {
  accent-color: var(--green);
}

/* -------------------------
   Button
-------------------------- */
button {
  display: block;
  margin: 2.25rem auto 0;
  padding: 0.75rem 2.5rem;
  background-color: var(--green);
  color: var(--white);
  border: none;
  border-radius: 999px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

button:hover {
  background-color: var(--green-dark);
  transform: translateY(-1px);
}

/* -------------------------
   Results Section
-------------------------- */
#results {
  margin-top: 2.5rem;
  background-color: #fbfaf7;
  border: 1px solid var(--border-soft);
  padding: 1.75rem;
  border-radius: 14px;
}

#results h3 {
  margin-top: 0;
  color: var(--green);
}

#results ol {
  margin-left: 1.25rem;
  margin-bottom: 1rem;
}

#results li {
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

#results p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* -------------------------
   Responsive
-------------------------- */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.9rem;
  }

  #calculator {
    padding: 1.75rem 1.25rem;
  }
}