:root {
    --green:        #15803d;
    --green-dark:   #0f5c2e;
    --green-mid:    #22c55e;
    --green-light:  #dcfce7;
    --green-xlight: #f0fdf4;
    --yellow:       #fbbf24;
    --yellow-dark:  #d97706;
    --text:         #0f172a;
    --muted:        #64748b;
    --border:       #e2e8f0;
    --white:        #ffffff;
    --radius:       18px;
    --shadow:       0 4px 28px rgba(15, 92, 46, 0.11);
    --shadow-lg:    0 16px 56px rgba(15, 92, 46, 0.18);
}
 @font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-Italic.ttf') format('truetype');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-MediumItalic.ttf') format('truetype');
  font-weight: 500;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-SemiBoldItalic.ttf') format('truetype');
  font-weight: 600;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-BoldItalic.ttf') format('truetype');
  font-weight: 700;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-ExtraBold.ttf') format('truetype');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('../fonts/PlusJakartaSans-ExtraBoldItalic.ttf') format('truetype');
  font-weight: 800;
  font-style: italic;
  font-display: swap;
}

.calc-page * { font-family: 'Plus Jakarta Sans', sans-serif; box-sizing: border-box; }
.calc-page { background: #f1f5f9; min-height: 80vh; }

/* ── HERO ─────────────────────────────────────────────── */
.calc-hero {
    background: linear-gradient(135deg, #0a3d1c 0%, #0f5c2e 50%, #166534 100%);
    padding: 5.5rem 0 4rem;
    position: relative;
    overflow: hidden;
    text-align: center;
}
.calc-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 55% 70% at 10% 110%, rgba(34,197,94,0.16) 0%, transparent 55%),
        radial-gradient(ellipse 45% 60% at 90% -5%,  rgba(251,191,36,0.10) 0%, transparent 50%);
}
.calc-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, transparent, rgba(0,0,0,0.5) 30%, rgba(0,0,0,0.5) 70%, transparent);
}
.calc-hero-inner { position: relative; z-index: 2; }
.calc-hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    background: rgba(251,191,36,0.15);
    border: 1px solid rgba(251,191,36,0.35);
    color: var(--yellow);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 0.38rem 1.1rem;
    border-radius: 30px;
    margin-bottom: 1.3rem;
}
.calc-hero h1 {
    font-size: clamp(2rem, 5vw, 3.4rem);
    font-weight: 900;
    color: #fff;
    line-height: 1.1;
    margin-bottom: 0.9rem;
}
.calc-hero h1 span { color: var(--yellow); }
.calc-hero p {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.75;
    max-width: 500px;
    margin: 0 auto 2rem;
}
.calc-hero-pills { display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap; }
.calc-hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);
    color: rgba(255,255,255,0.78);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 1rem;
    border-radius: 30px;
}
.calc-hero-pill i { color: var(--yellow); font-size: 0.85rem; }

/* ── MAIN CONTENT ─────────────────────────────────────── */
.calc-body { padding: 4rem 0 5rem; }

/* ── INPUT CARD ───────────────────────────────────────── */
.calc-input-card {
    background: var(--white);
    border-radius: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 2.8rem 2.5rem;
    position: relative;
    overflow: hidden;
}
.calc-input-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--green), var(--green-mid), var(--yellow));
    border-radius: 5px 5px 0 0;
}
.calc-card-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--green);
    margin-bottom: 0.5rem;
    display: block;
}
.calc-section-title {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 0.4rem;
}
.calc-section-sub {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.65;
    margin-bottom: 2rem;
}

/* Bill input */
.bill-input-wrap { position: relative; margin-bottom: 1.5rem; }
.bill-input-prefix {
    position: absolute;
    left: 0;
    top: 0; bottom: 0;
    width: 56px;
    background: var(--green-xlight);
    border: 1.5px solid #bbf7d0;
    border-right: none;
    border-radius: 12px 0 0 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--green);
}
.bill-input-field {
    width: 100%;
    padding: 1rem 1rem 1rem 72px;
    border: 1.5px solid #bbf7d0;
    border-radius: 12px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    background: var(--green-xlight);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}
.bill-input-field:focus {
    border-color: var(--green);
    box-shadow: 0 0 0 4px rgba(21, 128, 61, 0.12);
    background: #fff;
}
.bill-input-field::placeholder { color: #94a3b8; font-weight: 500; font-size: 1rem; }

/* Quick select buttons */
.quick-bills { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2rem; }
.quick-bill-btn {
    background: #f8fafc;
    border: 1.5px solid var(--border);
    border-radius: 30px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--muted);
    padding: 0.38rem 1rem;
    cursor: pointer;
    transition: all 0.2s;
}
.quick-bill-btn:hover,
.quick-bill-btn.active {
    background: var(--green-light);
    border-color: var(--green);
    color: var(--green);
}

/* Slider */
.bill-slider-wrap { margin-bottom: 2rem; }
.bill-slider-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 0.5rem;
}
.bill-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 6px;
    background: linear-gradient(to right, var(--green) 0%, var(--green) 30%, #e2e8f0 30%);
    outline: none;
    cursor: pointer;
}
.bill-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--green);
    border: 3px solid #fff;
    box-shadow: 0 2px 8px rgba(21,128,61,0.35);
    cursor: pointer;
    transition: transform 0.15s;
}
.bill-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

/* Calculate button */
.btn-calculate {
    width: 100%;
    background: linear-gradient(135deg, var(--green), #14532d);
    color: #fff;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 20px rgba(21,128,61,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    position: relative;
    overflow: hidden;
}
.btn-calculate::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.08), transparent);
    opacity: 0;
    transition: opacity 0.2s;
}
.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(21,128,61,0.45);
}
.btn-calculate:hover::before { opacity: 1; }
.btn-calculate:active { transform: translateY(0); }

/* ── RESULT CARD ──────────────────────────────────────── */
.calc-result-card {
    background: var(--white);
    border-radius: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.calc-result-card.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
}
.calc-result-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.result-header {
    background: linear-gradient(135deg, #0a3d1c 0%, var(--green-dark) 100%);
    padding: 1.8rem 2rem;
    position: relative;
    overflow: hidden;
}
.result-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 32px 32px;
}
.result-header-inner { position: relative; z-index: 1; }
.result-header-title {
    color: rgba(255,255,255,0.65);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}
.result-header-bill {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
}
.result-header-bill span {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--yellow);
}
.result-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(34,197,94,0.18);
    border: 1px solid rgba(34,197,94,0.3);
    color: #86efac;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.28rem 0.8rem;
    border-radius: 20px;
}

.result-grid { padding: 1.8rem; }

/* Stat boxes */
.result-stat {
    background: var(--green-xlight);
    border: 1.5px solid #bbf7d0;
    border-radius: 16px;
    padding: 1.4rem 1.2rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}
.result-stat::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: 3px 3px 0 0;
}
.result-stat-system::before { background: var(--green); }
.result-stat-cost::before   { background: #f59e0b; }
.result-stat-month::before  { background: #22c55e; }
.result-stat-year::before   { background: #0ea5e9; }

.result-stat:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(21,128,61,0.14); }
.result-stat-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
    margin: 0 auto 0.8rem;
}
.result-stat-system .result-stat-icon { background: var(--green-light); color: var(--green); }
.result-stat-cost   .result-stat-icon { background: #fef3c7; color: #d97706; }
.result-stat-month  .result-stat-icon { background: #dcfce7; color: #16a34a; }
.result-stat-year   .result-stat-icon { background: #e0f2fe; color: #0284c7; }

.result-stat-num {
    font-size: 1.8rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 0.25rem;
}
.result-stat-system .result-stat-num { color: var(--green); }
.result-stat-cost   .result-stat-num { color: #d97706; }
.result-stat-month  .result-stat-num { color: #16a34a; }
.result-stat-year   .result-stat-num { color: #0284c7; }

.result-stat-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--muted);
    line-height: 1.4;
}

/* Payback bar */
.payback-section {
    margin: 0 1.8rem 1.8rem;
    background: var(--green-xlight);
    border: 1px solid #bbf7d0;
    border-radius: 14px;
    padding: 1.3rem 1.5rem;
}
.payback-title {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.payback-title i { color: var(--green); }
.payback-bar-wrap {
    background: #e2e8f0;
    border-radius: 10px;
    height: 10px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}
.payback-bar-fill {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--green), var(--green-mid));
    width: 0;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.payback-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--muted);
    font-weight: 600;
}

/* 25-year savings */
.lifetime-box {
    margin: 0 1.8rem 1.8rem;
    background: linear-gradient(135deg, var(--green-dark) 0%, #166534 100%);
    border-radius: 14px;
    padding: 1.4rem 1.6rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.lifetime-box-text { color: rgba(255,255,255,0.75); font-size: 0.85rem; font-weight: 600; }
.lifetime-box-num  { font-size: 1.8rem; font-weight: 900; color: var(--yellow); line-height: 1; }
.lifetime-box-sub  { font-size: 0.72rem; color: rgba(255,255,255,0.55); }

/* Note */
.result-note {
    margin: 0 1.8rem 1.8rem;
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 10px;
    padding: 0.9rem 1.1rem;
    font-size: 0.8rem;
    color: #92400e;
    line-height: 1.55;
    display: flex;
    gap: 0.5rem;
}
.result-note i { color: #f59e0b; flex-shrink: 0; margin-top: 1px; }

/* ── CTA CARD ─────────────────────────────────────────── */
.calc-cta-card {
    background: linear-gradient(135deg, #0a3d1c 0%, var(--green-dark) 50%, #166534 100%);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-top: 2.5rem;
}
.calc-cta-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 80% at 0% 50%,   rgba(34,197,94,0.12) 0%, transparent 55%),
        radial-gradient(ellipse 50% 70% at 100% 50%,  rgba(251,191,36,0.09) 0%, transparent 55%);
}
.calc-cta-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 36px 36px;
}
.calc-cta-inner { position: relative; z-index: 2; }
.calc-cta-card h3 {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 0.5rem;
}
.calc-cta-card p {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    line-height: 1.7;
    max-width: 420px;
    margin: 0 auto 1.8rem;
}
.cta-phone-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 800;
    padding: 0.7rem 1.6rem;
    border-radius: 50px;
    margin-bottom: 1.3rem;
    letter-spacing: 0.3px;
}
.cta-phone-chip i { color: var(--yellow); font-size: 1.2rem; }

.btn-cta-yellow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--yellow);
    color: #111;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.85rem 2.2rem;
    border-radius: 12px;
    border: none;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 20px rgba(251,191,36,0.4);
}
.btn-cta-yellow:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(251,191,36,0.55);
    color: #111;
    text-decoration: none;
}
.btn-cta-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    color: rgba(255,255,255,0.85);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.83rem 2.2rem;
    border-radius: 12px;
    border: 1.5px solid rgba(255,255,255,0.28);
    text-decoration: none;
    transition: all 0.2s;
}
.btn-cta-outline:hover {
    border-color: rgba(255,255,255,0.65);
    color: #fff;
    background: rgba(255,255,255,0.07);
    text-decoration: none;
}

/* ── HOW IT'S CALCULATED sidebar ─────────────────────── */
.info-card {
    background: var(--white);
    border-radius: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 1.5rem;
}
.info-card-title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.1px;
    text-transform: uppercase;
    color: var(--green);
    margin-bottom: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.formula-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.85rem;
}
.formula-row:last-child { border-bottom: none; }
.formula-row-label { color: var(--muted); font-weight: 500; }
.formula-row-val { font-weight: 700; color: var(--text); }
.formula-row-val.green { color: var(--green); }

.benefit-row {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    margin-bottom: 0.8rem;
    font-size: 0.86rem;
    color: #374151;
    line-height: 1.55;
}
.benefit-row i { color: var(--green); margin-top: 2px; flex-shrink: 0; }

/* Scroll reveal */
.fe-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fe-reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 767px) {
    .calc-input-card,
    .calc-cta-card  { padding: 2rem 1.5rem; }
    .result-grid    { padding: 1.2rem; }
    .payback-section,
    .lifetime-box,
    .result-note    { margin-left: 1.2rem; margin-right: 1.2rem; }
    .result-stat-num { font-size: 1.4rem; }
}