/* ==========================================================================
   GrowBase Commercial — Modern Dark Tech Theme
   ========================================================================== */

:root {
  --bg-primary: #0a0f0d;
  --bg-secondary: #121815;
  --bg-card: #18221d;
  --bg-card-hover: #1f2c25;
  --border-subtle: #24342c;
  --border-focus: #10b981;
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --accent-emerald: #10b981;
  --accent-emerald-light: #34d399;
  --accent-emerald-dim: rgba(16, 185, 129, 0.12);
  --accent-gold: #f59e0b;
  --accent-blue: #38bdf8;
  --accent-rose: #fb7185;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Typography & Gradients ────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-emerald-light), #6ee7b7, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Announcement Bar ──────────────────────────────────────────────────── */
.announcement-bar {
  background: linear-gradient(90deg, #064e3b, #047857);
  font-size: 0.85rem;
  padding: 8px 0;
  color: #d1fae5;
  text-align: center;
}

.announcement-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.link-underline {
  color: #a7f3d0;
  text-decoration: underline;
  font-weight: 600;
}

/* ── Header ────────────────────────────────────────────────────────────── */
.site-header {
  background-color: rgba(10, 15, 13, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-subtle);
  padding: 16px 0;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 1.6rem;
}

.logo-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  display: block;
}

.logo-subtitle {
  font-size: 0.7rem;
  color: var(--accent-emerald);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  display: block;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--accent-emerald-light);
}

/* ── Buttons & Badges ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-emerald), #059669);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-emerald-light), var(--accent-emerald));
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
  transform: translateY(-1px);
}

.btn-buy {
  background: linear-gradient(135deg, #10b981, #047857);
  color: #fff;
  font-size: 0.85rem;
  padding: 8px 14px;
  font-weight: 600;
}

.btn-buy:hover {
  background: linear-gradient(135deg, #34d399, #059669);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.82rem;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
}

.badge-accent {
  background-color: var(--accent-emerald-dim);
  color: var(--accent-emerald-light);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ── Hero Section ──────────────────────────────────────────────────────── */
.hero-section {
  padding: 72px 0 54px;
  text-align: center;
  background: radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.12) 0%, transparent 60%);
}

.hero-badge-wrap {
  margin-bottom: 20px;
}

.hero-badge {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--accent-emerald-light);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.hero-title {
  font-size: 3.2rem;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 40px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.metric-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
}

.metric-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-emerald-light);
  font-family: var(--font-mono);
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-top: 4px;
}

/* ── Section Structure ─────────────────────────────────────────────────── */
.section {
  padding: 72px 0;
  border-top: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 40px;
}

.section-tag {
  color: var(--accent-emerald);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.1rem;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ── Advisor Tool ──────────────────────────────────────────────────────── */
.advisor-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-md);
  max-width: 900px;
  margin: 0 auto;
}

.advisor-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-select, .form-input {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form-select:focus, .form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.advisor-result-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.advisor-result-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.compat-item-box {
  padding: 16px;
  border-radius: var(--radius-md);
  background-color: rgba(255, 255, 255, 0.02);
  border-left: 4px solid var(--accent-emerald);
}

.compat-item-box.warning {
  border-left-color: var(--accent-gold);
}

.compat-item-box.engineered-solution {
  border-left-color: var(--accent-emerald-light);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.06), rgba(56, 189, 248, 0.04));
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-left-width: 4px;
}

.compat-item-title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.compat-item-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Filters & Tabs ────────────────────────────────────────────────────── */
.filter-controls {
  margin-bottom: 32px;
}

.category-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.cat-tab {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.cat-tab:hover {
  background: var(--bg-card);
  color: #fff;
}

.cat-tab.active {
  background: var(--accent-emerald);
  color: #fff;
  border-color: var(--accent-emerald);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.brand-filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
}

.brand-pill {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.brand-pill:hover {
  border-color: var(--accent-emerald);
  color: var(--text-main);
}

.brand-pill.active {
  background: var(--accent-emerald-dim);
  border-color: var(--accent-emerald);
  color: var(--accent-emerald-light);
}

.search-box {
  flex: 1;
  max-width: 360px;
}

/* ── Product Cards Grid ────────────────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.product-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.product-card:hover {
  transform: translateY(-2px);
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: var(--shadow-md);
}

.product-header {
  margin-bottom: 16px;
}

.product-brand-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.brand-acinfinity { background: #1e3a8a; color: #93c5fd; }
.brand-vivosun { background: #064e3b; color: #6ee7b7; }
.brand-spiderfarmer { background: #7c2d12; color: #fdba74; }
.brand-marshydro { background: #581c87; color: #d8b4fe; }
.brand-other { background: #374151; color: #d1d5db; }

.product-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.35;
}

.product-model {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

.product-body {
  flex: 1;
  margin-bottom: 20px;
}

.product-price-row {
  margin: 12px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.product-price {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
}

.price-unit {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.price-date {
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-left: 4px;
}

.variants-list {
  margin-top: 12px;
  background-color: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.8rem;
}

.variants-title {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.variant-item {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

.variant-item:last-child {
  border-bottom: none;
}

.compat-preview {
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: rgba(16, 185, 129, 0.04);
  border-left: 3px solid var(--accent-emerald);
  padding: 8px 10px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

/* ── FAQ & Guides Accordion ────────────────────────────────────────────── */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.faq-item:hover {
  border-color: rgba(16, 185, 129, 0.4);
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-icon {
  color: var(--accent-emerald);
  font-size: 1.2rem;
}

.faq-answer {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  display: none;
}

.faq-answer.open {
  display: block;
}

.faq-tip {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--accent-emerald-light);
  font-weight: 600;
}

/* ── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-primary);
  padding: 48px 0;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-left {
  max-width: 480px;
}

.footer-disclosure {
  margin-top: 12px;
  font-size: 0.8rem;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.mobile-menu-btn { display: none; }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
  }
  .hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text-main);
    transition: transform 0.3s, opacity 0.3s;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 16px 24px;
    gap: 12px;
  }
  .nav-links.open { display: flex; }
  .header-cta { display: none; }

  .hero-title {
    font-size: 2.2rem;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .advisor-form {
    grid-template-columns: 1fr;
  }
  .filter-row {
    flex-direction: column;
    align-items: stretch;
  }
  .search-box {
    max-width: 100%;
  }
}