/* ===== SMART AGRICULTURE PORTAL — STYLE.CSS ===== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700;900&family=Inter:wght@300;400;500;600&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  --green-deep:   #1B4332;
  --green-mid:    #2D6A4F;
  --green-leaf:   #40916C;
  --green-light:  #74C69D;
  --green-pale:   #D8F3DC;
  --gold:         #F4A261;
  --gold-dark:    #E76F51;
  --cream:        #F8F4EE;
  --cream-dark:   #EDE8DF;
  --charcoal:     #1C1C1E;
  --gray-text:    #4A4A4A;
  --gray-muted:   #8A8A8A;
  --white:        #FFFFFF;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --shadow-sm:    0 2px 8px rgba(27,67,50,0.08);
  --shadow-md:    0 8px 24px rgba(27,67,50,0.12);
  --shadow-lg:    0 16px 48px rgba(27,67,50,0.16);

  --radius:       12px;
  --radius-lg:    20px;
  --transition:   0.3s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--charcoal);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; }
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 900; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); font-weight: 600; }
p  { font-size: 1rem; color: var(--gray-text); }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(27, 67, 50, 0.97);
  backdrop-filter: blur(12px);
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 70px;
  border-bottom: 1px solid rgba(116,198,157,0.2);
  transition: var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow-lg);
}
.nav-logo {
  display: flex; align-items: center; gap: 0.6rem;
}
.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--gold);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.nav-logo span {
  font-family: var(--font-display);
  font-size: 1.3rem; font-weight: 700;
  color: var(--white);
}
.nav-logo span em {
  color: var(--gold);
  font-style: normal;
}
.nav-links {
  display: flex; align-items: center; gap: 0.2rem;
}
.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem; font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  transition: var(--transition);
  letter-spacing: 0.01em;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.12);
}
.nav-links a.active {
  color: var(--gold);
}
.nav-cta {
  background: var(--gold) !important;
  color: var(--charcoal) !important;
  font-weight: 600 !important;
  padding: 0.5rem 1.2rem !important;
}
.nav-cta:hover { background: var(--gold-dark) !important; color: var(--white) !important; }

.hamburger {
  display: none;
  flex-direction: column; gap: 5px; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--white); border-radius: 2px;
  transition: var(--transition);
}

/* ===== PAGE OFFSET FOR FIXED NAV ===== */
main { padding-top: 70px; }

/* ===== HERO — HOME ===== */
.hero {
  min-height: calc(100vh - 70px);
  background: linear-gradient(135deg, var(--green-deep) 0%, var(--green-mid) 60%, var(--green-leaf) 100%);
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  padding: 4rem 2rem;
}
.hero-bg-pattern {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(116,198,157,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(244,162,97,0.1) 0%, transparent 40%);
}
.hero-content {
  max-width: 1200px; margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.hero-text .eyebrow {
  display: inline-block;
  background: rgba(116,198,157,0.2);
  color: var(--green-light);
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.35rem 1rem; border-radius: 50px;
  margin-bottom: 1.2rem;
  border: 1px solid rgba(116,198,157,0.3);
}
.hero-text h1 { color: var(--white); margin-bottom: 1.2rem; }
.hero-text h1 span { color: var(--gold); }
.hero-text p {
  color: rgba(255,255,255,0.75);
  font-size: 1.1rem; max-width: 480px;
  margin-bottom: 2rem; line-height: 1.7;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn-primary {
  background: var(--gold);
  color: var(--charcoal);
  font-weight: 700; font-size: 0.95rem;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  border: none; cursor: pointer;
  transition: var(--transition);
  display: inline-flex; align-items: center; gap: 0.5rem;
  box-shadow: 0 4px 16px rgba(244,162,97,0.4);
}
.btn-primary:hover {
  background: var(--gold-dark); color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(244,162,97,0.5);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  font-weight: 600; font-size: 0.95rem;
  padding: 0.85rem 2rem;
  border-radius: 50px;
  border: 2px solid rgba(255,255,255,0.4);
  cursor: pointer; transition: var(--transition);
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.1);
}
.hero-illustration { display: flex; justify-content: center; }

/* Field SVG Scene */
.field-scene { width: 100%; max-width: 480px; }

/* Stats row */
.hero-stats {
  display: flex; gap: 2rem;
  margin-top: 2.5rem; padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.stat-item .num {
  font-family: var(--font-display);
  font-size: 1.8rem; font-weight: 900;
  color: var(--gold);
}
.stat-item .label {
  font-size: 0.8rem; color: rgba(255,255,255,0.6); margin-top: 0.1rem;
}

/* ===== SECTION COMMON ===== */
.section {
  padding: 5rem 2rem;
}
.section-alt { background: var(--white); }
.section-dark { background: var(--green-deep); }

.container {
  max-width: 1200px; margin: 0 auto; width: 100%;
}
.section-header {
  text-align: center; margin-bottom: 3.5rem;
}
.section-header .eyebrow {
  display: inline-block;
  background: var(--green-pale);
  color: var(--green-mid);
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.35rem 1rem; border-radius: 50px;
  margin-bottom: 1rem;
}
.section-header h2 { color: var(--green-deep); margin-bottom: 0.8rem; }
.section-dark .section-header h2 { color: var(--white); }
.section-header p { max-width: 580px; margin: 0 auto; font-size: 1.05rem; }

/* ===== FEATURE CARDS ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--cream-dark);
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--green-leaf), var(--gold));
  transform: scaleX(0); transform-origin: left;
  transition: var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--green-pale); }
.card:hover::before { transform: scaleX(1); }
.card-icon {
  width: 56px; height: 56px;
  background: var(--green-pale);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 1.2rem;
}
.card h3 { color: var(--green-deep); margin-bottom: 0.6rem; }
.card p { font-size: 0.95rem; line-height: 1.65; }

/* On dark sections */
.card-dark {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}
.card-dark h3 { color: var(--white); }
.card-dark p { color: rgba(255,255,255,0.65); }
.card-dark .card-icon { background: rgba(116,198,157,0.15); }

/* ===== PAGE HERO (inner pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--green-deep), var(--green-mid));
  padding: 5rem 2rem 4rem;
  text-align: center;
}
.page-hero h1 { color: var(--white); margin-bottom: 0.8rem; }
.page-hero p { color: rgba(255,255,255,0.7); font-size: 1.1rem; max-width: 560px; margin: 0 auto; }
.breadcrumb {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem; color: rgba(255,255,255,0.5);
}
.breadcrumb a { color: var(--gold); }
.breadcrumb span { color: rgba(255,255,255,0.3); }

/* ===== CROPS PAGE ===== */
.crop-filter {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  justify-content: center; margin-bottom: 2.5rem;
}
.filter-btn {
  background: var(--white);
  border: 2px solid var(--cream-dark);
  color: var(--gray-text);
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem; font-weight: 500;
  cursor: pointer; transition: var(--transition);
}
.filter-btn:hover,
.filter-btn.active {
  background: var(--green-leaf);
  border-color: var(--green-leaf);
  color: var(--white);
}
.crop-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--cream-dark);
  transition: var(--transition);
}
.crop-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.crop-card-img {
  height: 160px;
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
  background: linear-gradient(135deg, var(--green-pale), var(--cream-dark));
}
.crop-card-body { padding: 1.5rem; }
.crop-card-body h3 { color: var(--green-deep); margin-bottom: 0.4rem; font-size: 1.1rem; }
.crop-meta {
  display: flex; gap: 1rem; margin-top: 0.8rem; flex-wrap: wrap;
}
.meta-tag {
  font-size: 0.78rem; font-weight: 500;
  background: var(--green-pale);
  color: var(--green-mid);
  padding: 0.25rem 0.7rem;
  border-radius: 50px;
}
.meta-tag.season { background: #FFF3E0; color: #E65100; }
.meta-tag.water  { background: #E3F2FD; color: #1565C0; }

/* ===== WEATHER PAGE ===== */
.weather-card {
  background: linear-gradient(135deg, var(--green-deep), var(--green-mid));
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  color: var(--white);
  text-align: center;
  position: relative; overflow: hidden;
}
.weather-card::after {
  content: '';
  position: absolute; top: -40%; right: -20%;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(116,198,157,0.1);
  pointer-events: none;
}
.weather-temp {
  font-family: var(--font-display);
  font-size: 5rem; font-weight: 900;
  color: var(--gold);
  line-height: 1;
}
.weather-icon-big { font-size: 4rem; margin-bottom: 0.5rem; }
.weather-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem; margin-top: 2rem;
}
.weather-info-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  border: 1px solid var(--cream-dark);
}
.weather-info-card .wi-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.weather-info-card .wi-val {
  font-family: var(--font-display); font-size: 1.8rem; font-weight: 700;
  color: var(--green-mid);
}
.weather-info-card .wi-label { font-size: 0.85rem; color: var(--gray-muted); }
.forecast-row {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 1rem;
  margin-top: 2rem;
}
.forecast-day {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1rem 0.5rem;
  text-align: center;
  border: 1px solid var(--cream-dark);
  transition: var(--transition);
}
.forecast-day:hover {
  border-color: var(--green-leaf);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.forecast-day .fd-day { font-size: 0.75rem; font-weight: 600; color: var(--gray-muted); text-transform: uppercase; }
.forecast-day .fd-icon { font-size: 1.6rem; margin: 0.4rem 0; }
.forecast-day .fd-temp { font-weight: 700; color: var(--green-deep); font-size: 0.95rem; }

/* ===== FERTILIZER PAGE ===== */
.calc-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--cream-dark);
  max-width: 700px; margin: 0 auto;
}
.form-group { margin-bottom: 1.5rem; }
.form-group label {
  display: block; font-size: 0.9rem; font-weight: 600;
  color: var(--green-deep); margin-bottom: 0.5rem;
}
.form-group select,
.form-group input {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 2px solid var(--cream-dark);
  border-radius: var(--radius);
  font-family: var(--font-body); font-size: 0.95rem;
  color: var(--charcoal);
  background: var(--cream);
  transition: var(--transition); outline: none;
  appearance: none;
}
.form-group select:focus,
.form-group input:focus {
  border-color: var(--green-leaf);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(64,145,108,0.12);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.result-box {
  background: var(--green-pale);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1.5rem;
  border-left: 4px solid var(--green-leaf);
  display: none;
}
.result-box.show { display: block; }
.result-box h4 { color: var(--green-deep); margin-bottom: 0.8rem; font-family: var(--font-display); }
.result-item {
  display: flex; justify-content: space-between;
  padding: 0.6rem 0; border-bottom: 1px solid rgba(27,67,50,0.1);
  font-size: 0.95rem;
}
.result-item:last-child { border-bottom: none; }
.result-item span:last-child { font-weight: 700; color: var(--green-mid); }

/* ===== SERVICES PAGE ===== */
.service-card {
  display: grid; grid-template-columns: 80px 1fr; gap: 1.5rem;
  background: var(--white);
  border-radius: var(--radius-lg); padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--cream-dark);
  transition: var(--transition);
  align-items: start;
}
.service-card:hover {
  border-color: var(--green-leaf);
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
}
.service-icon {
  width: 60px; height: 60px;
  background: var(--green-pale);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; flex-shrink: 0;
}
.service-body h3 { color: var(--green-deep); margin-bottom: 0.4rem; }
.service-body p { font-size: 0.95rem; }
.service-features {
  display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.8rem;
}
.sf-tag {
  font-size: 0.78rem; font-weight: 500;
  background: var(--cream); color: var(--green-mid);
  padding: 0.2rem 0.7rem; border-radius: 50px;
  border: 1px solid var(--cream-dark);
}

/* ===== ABOUT PAGE ===== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.about-img-block {
  position: relative;
}
.about-img-main {
  width: 100%; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--green-pale), var(--cream-dark));
  min-height: 360px;
  display: flex; align-items: center; justify-content: center;
  font-size: 8rem;
}
.about-badge {
  position: absolute; bottom: -1rem; right: -1rem;
  background: var(--gold);
  color: var(--charcoal);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  text-align: center; box-shadow: var(--shadow-md);
}
.about-badge .num {
  font-family: var(--font-display); font-size: 2rem; font-weight: 900; display: block;
}
.about-badge .lbl { font-size: 0.8rem; font-weight: 600; }
.team-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem;
}
.team-card {
  background: var(--white);
  border-radius: var(--radius-lg); padding: 2rem;
  text-align: center; border: 1px solid var(--cream-dark);
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.team-avatar {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--green-pale);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; margin: 0 auto 1rem;
  border: 3px solid var(--green-leaf);
}
.team-card h4 { color: var(--green-deep); }
.team-card p { font-size: 0.85rem; color: var(--gray-muted); }

/* ===== CONTACT PAGE ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 3rem;
}
.contact-info h3 { color: var(--green-deep); margin-bottom: 1.5rem; }
.contact-item {
  display: flex; gap: 1rem; align-items: flex-start;
  margin-bottom: 1.5rem;
}
.ci-icon {
  width: 44px; height: 44px;
  background: var(--green-pale);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.ci-body strong { display: block; font-weight: 600; color: var(--green-deep); }
.ci-body span { font-size: 0.9rem; color: var(--gray-text); }
.contact-form-card {
  background: var(--white);
  border-radius: var(--radius-lg); padding: 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--cream-dark);
}
.contact-form-card h3 { color: var(--green-deep); margin-bottom: 1.5rem; }
.form-group textarea {
  width: 100%; padding: 0.85rem 1rem;
  border: 2px solid var(--cream-dark);
  border-radius: var(--radius);
  font-family: var(--font-body); font-size: 0.95rem;
  color: var(--charcoal); background: var(--cream);
  resize: vertical; min-height: 120px;
  transition: var(--transition); outline: none;
}
.form-group textarea:focus {
  border-color: var(--green-leaf);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(64,145,108,0.12);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--green-deep);
  color: rgba(255,255,255,0.7);
  padding: 4rem 2rem 2rem;
}
.footer-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 1rem; }
.footer-brand .logo span {
  font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--white);
}
.footer-brand .logo span em { color: var(--gold); font-style: normal; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 260px; }
.footer-col h4 {
  color: var(--white); font-size: 0.9rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 1.2rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col ul li a {
  font-size: 0.88rem; transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--gold); padding-left: 4px; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto;
  padding-top: 2rem;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.85rem; flex-wrap: wrap; gap: 1rem;
}
.footer-social { display: flex; gap: 0.8rem; }
.social-link {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; transition: var(--transition);
}
.social-link:hover {
  background: var(--green-leaf);
  border-color: var(--green-leaf);
  color: var(--white);
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 9999;
  background: var(--green-deep);
  color: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 0.8rem;
  transform: translateY(100px); opacity: 0;
  transition: var(--transition);
  font-size: 0.9rem; font-weight: 500;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast span { font-size: 1.2rem; }

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes sway {
  0%, 100% { transform: rotate(-2deg); }
  50%       { transform: rotate(2deg); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}
@keyframes pulse-ring {
  0%   { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(64,145,108,0.4); }
  70%  { transform: scale(1);    box-shadow: 0 0 0 12px rgba(64,145,108,0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(64,145,108,0); }
}
.animate-fade-up { animation: fadeUp 0.7s ease both; }
.animate-float   { animation: float 4s ease-in-out infinite; }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== BACK TO TOP ===== */
#backToTop {
  position: fixed; bottom: 2rem; left: 2rem; z-index: 999;
  width: 44px; height: 44px;
  background: var(--green-leaf);
  color: var(--white);
  border: none; border-radius: 50%;
  font-size: 1.1rem; cursor: pointer;
  box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  opacity: 0; pointer-events: none;
}
#backToTop.show { opacity: 1; pointer-events: auto; }
#backToTop:hover { background: var(--green-deep); transform: translateY(-3px); }