/* ============================================================
   Vintelligence — Main Stylesheet
   Aesthetic: Refined vineyard — warm, approachable, light
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400&family=Source+Sans+3:wght@300;400;500;600&display=swap');

/* --- Design Tokens --- */
:root {
  --color-bg:         #FAF7F2;
  --color-bg-alt:     #F3EDE4;
  --color-bg-accent:  #EDE5D8;
  --color-surface:    #FFFFFF;
  --color-text:       #3B2F2F;
  --color-text-light: #6B5E5E;
  --color-text-muted: #9A8C8C;
  --color-heading:    #4A1C2B;
  --color-primary:    #722F37;       /* deep wine / maroon */
  --color-primary-hover: #8B3A44;
  --color-primary-light: rgba(114,47,55,0.08);
  --color-accent:     #C9956B;       /* warm gold */
  --color-accent-light: #D4A97A;
  --color-border:     #E2D9CE;
  --color-border-light: #EDE5D8;

  --font-display:  'Cormorant Garamond', 'Georgia', serif;
  --font-body:     'Source Sans 3', 'Segoe UI', sans-serif;

  --max-w:  1120px;
  --max-w-narrow: 780px;

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

  --shadow-card: 0 2px 12px rgba(74,28,43,0.06);
  --shadow-elevated: 0 8px 32px rgba(74,28,43,0.10);

  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

img { max-width: 100%; height: auto; display: block; }
a   { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-heading);
  font-weight: 600;
  line-height: 1.2;
}
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.25rem; }

p { margin-bottom: 1em; }

/* --- Layout Utilities --- */
.container      { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.container--narrow { max-width: var(--max-w-narrow); margin: 0 auto; padding: 0 2rem; }
.text-center    { text-align: center; }

/* --- Header / Nav --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,247,242,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.site-header__logo img {
  height: 52px;
  width: auto;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.site-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.02em;
  position: relative;
}
.site-nav a.btn--primary {
  color: #fff;
}
.site-nav a.btn--primary:hover {
  color: #fff;
}
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}
.site-nav a:hover { color: var(--color-primary); }
.site-nav a:hover::after { width: 100%; }
.site-nav a.active { color: var(--color-primary); }
.site-nav a.active::after { width: 100%; }

/* Mobile nav toggle */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--color-text); margin: 5px 0;
  transition: var(--transition);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(114,47,55,0.25);
}
.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
}
.btn--small {
  font-size: 0.85rem;
  padding: 0.55rem 1.2rem;
}

/* --- Hero Section --- */
.hero {
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -30%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(114,47,55,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero__content { position: relative; z-index: 1; }
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.hero__eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--color-accent);
}
.hero h1 {
  margin-bottom: 0.75rem;
}
.hero__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 520px;
}
.hero__price-callout {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  padding: 0.85rem 1.4rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-heading);
  max-width: 520px;
}
.hero__price-callout strong {
  font-size: 1.15rem;
  color: var(--color-primary);
  white-space: nowrap;
}
.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.hero__image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
}
.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- Section Spacing --- */
.section {
  padding: 5rem 0;
}
.section--alt {
  background: var(--color-bg-alt);
}
.section--accent {
  background: var(--color-bg-accent);
}
.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}
.section__header p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-top: 0.75rem;
}
.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

/* --- Feature Cards --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-card);
  border-color: transparent;
  transform: translateY(-2px);
}
.feature-card:hover::before {
  transform: scaleX(1);
}
.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
  font-size: 1.3rem;
}
.feature-card h3 {
  margin-bottom: 0.5rem;
}
.feature-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* --- Why Vintelligence (Problem/Solution) --- */
.why-section .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.why-section__text h2 { margin-bottom: 1rem; }
.why-section__text p { color: var(--color-text-light); }
.why-section__visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
}
.stat-card__number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}
.stat-card__label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-heading) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: 4rem 2rem;
  text-align: center;
  border-radius: var(--radius-lg);
  margin: 0 2rem;
  position: relative;
  overflow: hidden;
}
.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}
.cta-banner h2 {
  color: #fff;
  margin-bottom: 0.5rem;
}
.cta-banner p {
  color: rgba(255,255,255,0.8);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}
.cta-banner .btn--primary {
  background: #fff;
  color: var(--color-primary);
}
.cta-banner .btn--primary:hover {
  background: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

/* --- Demo Page — Dashboard Screenshots --- */
.demo-screenshots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2rem 0 3rem;
}
.demo-screenshots img {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition);
}
.demo-screenshots img:hover {
  transform: scale(1.015);
}
.demo-screenshots--single {
  grid-template-columns: 1fr;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Demo Page — Sensor Grid --- */
.sensor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}
.sensor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}
.sensor-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.sensor-card__image {
  height: 200px;
  overflow: hidden;
  background: var(--color-bg-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sensor-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
}
.sensor-card__body {
  padding: 1.5rem;
}
.sensor-card__body h3 {
  margin-bottom: 0.5rem;
}
.sensor-card__body p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* --- About Page --- */
.about-hero {
  padding: 5rem 0 3rem;
  text-align: center;
}
.about-hero h1 { margin-bottom: 0.5rem; }
.about-hero p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 500px;
  margin: 0 auto;
}
.about-content {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 2rem 4rem;
}
.about-content p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}
.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-top: 3rem;
}
.value-card {
  text-align: center;
  padding: 2rem 1.5rem;
}
.value-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--color-primary);
  font-size: 1.4rem;
}
.value-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}
.value-card p {
  font-size: 0.92rem;
  color: var(--color-text-light);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-light);
  padding: 3rem 0 2rem;
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-brand img {
  height: auto;
  width: 130px;
  margin-bottom: 0.75rem;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  max-width: 280px;
}
.footer-links h4 {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}
.footer-links ul {
  list-style: none;
}
.footer-links li + li {
  margin-top: 0.4rem;
}
.footer-links a {
  font-size: 0.92rem;
  color: var(--color-text-light);
}
.footer-links a:hover {
  color: var(--color-primary);
}
.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--color-border-light);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}
.footer-bottom a {
  color: var(--color-text-muted);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero__image { max-width: 560px; margin: 0 auto; }
  .features-grid { grid-template-columns: 1fr; }
  .why-section .container { grid-template-columns: 1fr; gap: 2rem; }
  .demo-screenshots { grid-template-columns: 1fr; }
  .sensor-grid { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr; }
  .cta-banner { margin: 0 1rem; }
}

@media (max-width: 640px) {
  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 2rem;
    gap: 1rem;
    box-shadow: var(--shadow-card);
  }
  .nav-toggle { display: block; }
  .hero { padding: 3rem 0 2.5rem; }
  .section { padding: 3rem 0; }
  .site-footer .container { flex-direction: column; }
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}