/*
Theme Name: HydroIQ Landing
Theme URI: https://hydroiq.example
Author: HydroIQ
Author URI: https://hydroiq.example
Description: A minimal, conversion-focused landing page theme for HydroIQ — a smart electrolyzed-water produce cleaner. "Clinical Freshness" aesthetic: aqua + coral on icy white, with a ripple-decontamination signature motif.
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: hydroiq
*/

/* ==========================================================================
   1. DESIGN TOKENS — edit these to restyle the whole site
   ========================================================================== */
:root {
  /* Color palette */
  --color-bg:      #F4FBFA; /* icy white-aqua background */
  --color-ink:     #0B2B2E; /* deep teal-black text */
  --color-primary: #00B6C9; /* HydroIQ aqua — primary accent */
  --color-accent:  #FF6B4A; /* coral — CTAs / urgency */
  --color-surface: #E4F4F3; /* pale aqua surface for sections/cards */
  --color-line:    #CDE7E5; /* hairline borders/dividers */
  --color-white:   #FFFFFF;

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;

  /* Spacing / layout */
  --maxw: 1140px;
  --gap-section: clamp(64px, 10vw, 140px);
  --radius: 14px;
}

/* ==========================================================================
   2. RESET & BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  margin: 0 0 0.5em;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

a { color: var(--color-primary); text-decoration: none; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: var(--gap-section) 0; }

/* Visible focus states for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==========================================================================
   3. BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  padding: 16px 32px;
  border-radius: 100px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  text-align: center;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 6px 20px rgba(255, 107, 74, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(255,107,74,0.45); }

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn-secondary:hover { background: var(--color-ink); color: var(--color-white); }

.btn-block { width: 100%; }

/* ==========================================================================
   4. HEADER / NAV
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 251, 250, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-logo .dot { color: var(--color-primary); }

.site-nav { display: none; gap: 32px; }
.site-nav a {
  color: var(--color-ink);
  font-weight: 600;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--color-primary); }

.header-cta { display: none; }

@media (min-width: 860px) {
  .site-nav { display: flex; }
  .header-cta { display: inline-flex; }
}

/* ==========================================================================
   5. HERO — signature ripple motif
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(48px, 8vw, 100px);
  padding-bottom: clamp(48px, 8vw, 100px);
}

.hero .container {
  display: grid;
  gap: 48px;
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .hero .container {
    grid-template-columns: 1.1fr 1fr;
  }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  margin-bottom: 0.4em;
}

.hero h1 .highlight {
  color: var(--color-primary);
  position: relative;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: rgba(11, 43, 46, 0.75);
  max-width: 46ch;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-microcopy {
  font-size: 0.9rem;
  color: rgba(11, 43, 46, 0.6);
}

/* Ripple visual */
.ripple-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ripple-ring {
  position: absolute;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  opacity: 0;
  animation: ripple-expand 4s ease-out infinite;
}
.ripple-ring:nth-child(1) { width: 30%; height: 30%; animation-delay: 0s; }
.ripple-ring:nth-child(2) { width: 30%; height: 30%; animation-delay: 1s; }
.ripple-ring:nth-child(3) { width: 30%; height: 30%; animation-delay: 2s; }
.ripple-ring:nth-child(4) { width: 30%; height: 30%; animation-delay: 3s; }

@keyframes ripple-expand {
  0%   { width: 30%; height: 30%; opacity: 0.9; border-color: var(--color-primary); }
  70%  { opacity: 0.15; }
  100% { width: 100%; height: 100%; opacity: 0; border-color: var(--color-accent); }
}

.ripple-core {
  position: relative;
  z-index: 2;
  width: 42%;
  aspect-ratio: 1/1;
  background: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 60px rgba(0, 182, 201, 0.25);
}

.ripple-core img {
  width: 60%;
  height: 60%;
  object-fit: contain;
}

@media (prefers-reduced-motion: reduce) {
  .ripple-ring { animation: none; opacity: 0.25; }
}

/* ==========================================================================
   6. SECTION HEADINGS
   ========================================================================== */
.section-head {
  max-width: 640px;
  margin: 0 auto var(--gap-section) auto;
  text-align: center;
}

.section-head .eyebrow {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.section-head h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-bottom: 0.5em;
}

.section-head p {
  color: rgba(11, 43, 46, 0.7);
  font-size: 1.05rem;
}

/* ==========================================================================
   7. PROBLEM / VALUE SECTION
   ========================================================================== */
.problem {
  background: var(--color-ink);
  color: var(--color-bg);
}

.problem .section-head h2,
.problem .section-head .eyebrow { color: var(--color-bg); }
.problem .section-head .eyebrow { color: var(--color-accent); }
.problem .section-head p { color: rgba(244,251,250,0.7); }

.problem-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .problem-grid { grid-template-columns: repeat(3, 1fr); }
}

.problem-card {
  border: 1px solid rgba(244,251,250,0.15);
  border-radius: var(--radius);
  padding: 28px;
}

.problem-card .stat {
  font-family: var(--font-display);
  font-size: 2.6rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.problem-card h3 { color: var(--color-bg); font-size: 1.15rem; }
.problem-card p { color: rgba(244,251,250,0.7); margin: 0; font-size: 0.95rem; }

/* ==========================================================================
   8. FEATURES
   ========================================================================== */
.features-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 182, 201, 0.12);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.feature-card h3 { font-size: 1.2rem; }
.feature-card p { color: rgba(11,43,46,0.7); margin: 0; font-size: 0.95rem; }

/* ==========================================================================
   9. SOCIAL PROOF
   ========================================================================== */
.proof {
  background: var(--color-surface);
}

.trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
  margin-bottom: 56px;
  opacity: 0.7;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.testimonial-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .testimonial-grid { grid-template-columns: repeat(3, 1fr); }
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.testimonial-stars { color: var(--color-accent); font-size: 1.1rem; letter-spacing: 2px; }

.testimonial-quote {
  font-size: 1rem;
  color: var(--color-ink);
  margin: 0;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  object-fit: cover;
}

.testimonial-author strong { display: block; font-size: 0.9rem; }
.testimonial-author span { display: block; font-size: 0.8rem; color: rgba(11,43,46,0.6); }

/* ==========================================================================
   10. PRICING
   ========================================================================== */
.pricing-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 760px) {
  .pricing-grid { grid-template-columns: repeat(3, 1fr); }
}

.price-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
  transform: scale(1.02);
  position: relative;
}

.price-card.featured h3,
.price-card.featured .price-amount { color: var(--color-bg); }

.price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
}

.price-card h3 { font-size: 1.1rem; margin-bottom: 8px; }

.price-amount {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.price-amount span { font-size: 1rem; font-weight: 500; opacity: 0.6; }

.price-note { font-size: 0.85rem; opacity: 0.7; margin-bottom: 24px; }

.price-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  text-align: left;
  font-size: 0.95rem;
  flex-grow: 1;
}

.price-features li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-line);
}

.price-card.featured .price-features li { border-bottom-color: rgba(244,251,250,0.15); }

.price-features li::before {
  content: "✓ ";
  color: var(--color-primary);
  font-weight: 700;
  margin-right: 6px;
}

/* ==========================================================================
   11. FINAL CTA
   ========================================================================== */
.final-cta {
  background: linear-gradient(135deg, var(--color-primary), #008C9E);
  color: var(--color-white);
  text-align: center;
  border-radius: 24px;
  margin: 0 auto;
  max-width: var(--maxw);
  padding: clamp(48px, 8vw, 90px) 24px;
}

.final-cta h2 { color: var(--color-white); font-size: clamp(1.9rem, 4vw, 2.8rem); }
.final-cta p { color: rgba(255,255,255,0.9); max-width: 50ch; margin: 0 auto 32px; }

.final-cta .btn-primary {
  background: var(--color-white);
  color: var(--color-ink);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}
.final-cta .btn-primary:hover { background: var(--color-bg); }

.final-cta .urgency {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.85);
  font-weight: 600;
}

/* ==========================================================================
   12. CONTACT FORM
   ========================================================================== */
.contact-form {
  max-width: 560px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.contact-form label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-white);
  color: var(--color-ink);
}

.contact-form textarea { resize: vertical; min-height: 120px; }

.form-status {
  font-size: 0.9rem;
  padding: 12px 16px;
  border-radius: 10px;
  display: none;
}
.form-status.success { display: block; background: #DDF6E5; color: #1B7A3E; }
.form-status.error   { display: block; background: #FBE0DA; color: #B5402A; }

/* ==========================================================================
   13. FOOTER
   ========================================================================== */
.site-footer {
  background: var(--color-ink);
  color: rgba(244,251,250,0.7);
  padding: 56px 0 28px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
  margin-bottom: 40px;
}

@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-bg);
  margin-bottom: 12px;
}
.footer-logo .dot { color: var(--color-primary); }

.footer-col h4 {
  color: var(--color-bg);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-col a { color: rgba(244,251,250,0.7); }
.footer-col a:hover { color: var(--color-primary); }

.footer-bottom {
  border-top: 1px solid rgba(244,251,250,0.1);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(244,251,250,0.5);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   15. UTILITIES
   ========================================================================== */
.text-center { text-align: center; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}