/* Smart Sensor Landing — Botanical Sage redesign */

:root {
    /* Sage / leaf palette */
    --sage-50:   #F2F7EF;
    --sage-100:  #E8F0E5;
    --sage-200:  #D6E5D0;
    --leaf-300:  #7BC97B;
    --leaf-500:  #4FAE5C;
    --leaf-600:  #3F9249;
    --leaf-700:  #2E7D32;

    /* Step badge */
    --sky-500:   #3B82F6;
    --sky-600:   #2563EB;

    /* Ink / surfaces */
    --ink-900:   #1F2937;
    --ink-700:   #374151;
    --ink-500:   #6B7280;
    --ink-400:   #9CA3AF;
    --line-100:  #E5E7EB;
    --line-200:  #D9DEE5;
    --white:     #FFFFFF;

    /* Status / accent */
    --terracotta: #C58B6E;

    /* Shadows */
    --shadow-card: 0 1px 2px rgba(31,41,55,0.04), 0 4px 12px rgba(31,41,55,0.06);
    --shadow-pill: 0 1px 2px rgba(31,41,55,0.06), 0 6px 16px rgba(31,41,55,0.08);
    --shadow-cta:  0 4px 14px rgba(63,146,73,0.3);
    --shadow-cta-hover: 0 6px 20px rgba(63,146,73,0.4);

    /* Layout */
    --container-max: 1200px;
    --section-padding: 5rem;
    --radius-card: 18px;
    --radius-pill: 9999px;
    --radius-btn: 12px;

    /* Motion */
    --transition-fast:   0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow:   0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    color: var(--ink-900);
    background-color: var(--sage-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

/* Photographic botanical backdrop — fixed behind all content, always blurred
   so foliage reads as a soft watercolor halo at every viewport.
   The 16:9 source (2560×1440) cannot show both foliage edges on any portrait
   viewport without distortion: with background-size: cover, a portrait viewport
   crops ~30% off each side, slicing out the foliage that lives on the source's
   left/right edges. So portrait-class viewports — phones AND tablet portrait
   (≤1023px) — use background-position: 20% center to keep the left-side foliage
   (fern + monstera) visible; landscape/desktop (≥1024px) centres the full image.
   transform: scale(1.05) prevents blur from leaking transparent edges into the viewport. */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url('/images/bg-botanical.webp');
    background-repeat: no-repeat;
    background-position: 20% center;
    background-size: cover;
    z-index: -1;
    pointer-events: none;
    filter: blur(4px);
    transform: scale(1.05);
    /* Fade the foliage in starting just below the nav so the brand mark sits
       over solid sage instead of leaves it would otherwise blend into. */
    -webkit-mask-image: linear-gradient(to bottom, transparent 0, transparent 64px, #000 100px);
    mask-image: linear-gradient(to bottom, transparent 0, transparent 64px, #000 100px);
}
@media (min-width: 1024px) {
    body::before { background-position: center; }
}
a { text-decoration: none; color: inherit; }
img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
    font-family: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--ink-900);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%      { opacity: 0.75; transform: scale(1.18); }
}
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal-on-scroll.is-visible { opacity: 1; transform: translateY(0); }

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: relative;
    z-index: 1;
    padding: 1.5rem 1.25rem 0;
}
.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}
.logo { display: flex; align-items: center; gap: 0.5rem; }
.logo-icon { width: 30px; height: 30px; }
.logo-text {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    background: linear-gradient(90deg, #60A5FA 0%, #7BC97B 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.btn-nav {
    padding: 0.6rem 1.1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--white);
    background: var(--leaf-500);
    border-radius: var(--radius-pill);
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.btn-nav:hover { background: var(--leaf-600); transform: translateY(-1px); }

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    z-index: 1;
    padding: 3rem 1.25rem 1rem;
    text-align: center;
}
.hero-content {
    max-width: 720px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease-out both;
}
.hero-badge {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    margin-bottom: 1.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--leaf-700);
    background: var(--white);
    border: 1px solid var(--line-100);
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-card);
}
.hero-title {
    font-size: clamp(2.25rem, 6vw, 3.75rem);
    margin-bottom: 1.25rem;
    font-weight: 800;
}
.hero-title .gradient-text {
    background: linear-gradient(90deg, #60A5FA 0%, #7BC97B 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.hero-subtitle {
    font-size: 1.0625rem;
    color: var(--ink-700);
    margin: 0 auto 2rem;
    max-width: 60ch;
    line-height: 1.5;
    text-wrap: balance;
}
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    justify-content: center;
    margin-bottom: 3rem;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--white);
    background: var(--leaf-500);
    border-radius: var(--radius-btn);
    box-shadow: var(--shadow-cta);
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.btn-primary:hover { background: var(--leaf-600); transform: translateY(-2px); box-shadow: var(--shadow-cta-hover); }
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--leaf-700);
    background: transparent;
    border: 1.5px solid var(--leaf-500);
    border-radius: var(--radius-btn);
    transition: background var(--transition-fast), color var(--transition-fast);
}
.btn-secondary:hover { background: var(--leaf-500); color: var(--white); }
.btn-icon { width: 16px; height: 16px; }

/* Hero photograph + floating metric pills */
.hero-photo {
    position: relative;
    max-width: 420px;
    margin: 0 auto;
}
.hero-photo > img,
.hero-photo > picture > img {
    width: 100%;
    height: auto;
    /* No card frame — plant should sit transparently on the page background */
}
.metric-pill {
    position: absolute;
    background: rgba(240, 249, 255, 0.85);
    backdrop-filter: blur(14px) saturate(1.4);
    -webkit-backdrop-filter: blur(14px) saturate(1.4);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 14px;
    padding: 0.7rem 0.9rem;
    box-shadow: var(--shadow-pill);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
    min-width: 110px;
}
.metric-pill--sensor   { top: 38%; left: -0.5rem; }
.metric-pill--humidity { top: 6%; right: -0.5rem; align-items: center; text-align: center; }
.metric-pill--status {
    bottom: 8%;
    right: 0.25rem;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    color: var(--ink-900);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    padding: 0.55rem 0.9rem;
    text-align: left;
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1.25;
    min-width: 0;
}
.metric-pill--status svg { color: var(--leaf-500); }
.metric-pill__row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--ink-500);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.metric-pill__value {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ink-900);
    line-height: 1;
}
.metric-pill__label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--ink-500);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.status-dot {
    width: 8px;
    height: 8px;
    background: var(--leaf-500);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}
.metric-pill--status svg { width: 24px; height: 24px; flex-shrink: 0; stroke-width: 2.6; }

/* ============================================
   Sections (shared)
   ============================================ */
.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.section-header { text-align: center; margin-bottom: 2.5rem; }
.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 0.6rem;
    font-weight: 800;
}
.section-subtitle {
    font-size: 1.05rem;
    color: var(--ink-500);
}

/* ============================================
   Features
   ============================================ */
.features {
    padding: 1.5rem 1.25rem var(--section-padding);
    position: relative;
    z-index: 1;
}
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
.feature-card {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(18px) saturate(1.4);
    -webkit-backdrop-filter: blur(18px) saturate(1.4);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 1px 2px rgba(31,41,55,0.04), 0 12px 28px rgba(31,41,55,0.1); }
.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 1rem;
    background: var(--sage-200);
    color: var(--leaf-700);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-title {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    font-weight: 700;
}
.feature-desc {
    font-size: 0.95rem;
    color: var(--ink-500);
    line-height: 1.6;
}

/* ============================================
   How it works
   ============================================ */
.how-it-works {
    padding: var(--section-padding) 1.25rem;
    position: relative;
    z-index: 1;
}
.steps-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    max-width: 720px;
    margin: 0 auto;
}
.step-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.1rem 1.2rem;
    background: rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(18px) saturate(1.4);
    -webkit-backdrop-filter: blur(18px) saturate(1.4);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}
.step-badge {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #93C5FD;
    color: var(--white);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 10px;
}
.step-content { flex: 1; }
.step-title {
    font-size: 1.05rem;
    margin-bottom: 0.2rem;
    font-weight: 700;
}
.step-desc {
    font-size: 0.92rem;
    color: var(--ink-500);
    line-height: 1.55;
}

/* ============================================
   CTA
   ============================================ */
.cta-section {
    padding: var(--section-padding) 1.25rem;
    position: relative;
    z-index: 1;
}
.cta-card {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
    padding: 3rem 1.75rem;
    background: linear-gradient(110deg, #DBEAFE 0%, #DBEAFE 25%, #DCFCE7 100%);
    border: 1px solid rgba(96, 165, 250, 0.2);
    border-radius: 24px;
}
.cta-title {
    font-size: clamp(1.5rem, 3.5vw, 2.1rem);
    margin-bottom: 0.7rem;
    font-weight: 800;
    color: var(--ink-900);
}
.cta-subtitle {
    font-size: 1rem;
    color: var(--ink-700);
    margin-bottom: 1.75rem;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 2.5rem 1.25rem 2rem;
    background: var(--white);
    border-top: 1px solid var(--line-100);
    position: relative;
    z-index: 1;
}
.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    text-align: center;
}
.footer-brand { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; }
.footer-tagline {
    font-size: 0.85rem;
    color: var(--ink-500);
}
.footer-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--ink-500);
}
.footer-links a { transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--leaf-700); }
.footer-links .divider { color: var(--line-200); }
.footer-copy {
    font-size: 0.75rem;
    color: var(--ink-400);
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 640px) {
    .metric-pill--sensor   { left: 1rem; }
    .metric-pill--humidity { right: 1rem; }
}
@media (max-width: 767px) {
    .hero-subtitle { font-size: 0.72rem; line-height: 1.5; }
}
@media (min-width: 768px) {
    .hero { padding: 4rem 2rem 5rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
    .step-card { padding: 1.25rem 1.5rem; }
    .footer-container { flex-direction: row; justify-content: space-between; text-align: left; }
    .footer-brand { flex-direction: row; align-items: center; gap: 0.75rem; }
}
@media (min-width: 1024px) {
    .features-grid { grid-template-columns: repeat(3, 1fr); }
    .hero-photo { max-width: 480px; }
}

/* Stagger reveals */
.features-grid .feature-card:nth-child(1) { transition-delay: 0s; }
.features-grid .feature-card:nth-child(2) { transition-delay: 0.08s; }
.features-grid .feature-card:nth-child(3) { transition-delay: 0.16s; }
.features-grid .feature-card:nth-child(4) { transition-delay: 0.24s; }
.features-grid .feature-card:nth-child(5) { transition-delay: 0.32s; }
.features-grid .feature-card:nth-child(6) { transition-delay: 0.40s; }
.steps-list .step-card:nth-child(1) { transition-delay: 0s; }
.steps-list .step-card:nth-child(2) { transition-delay: 0.1s; }
.steps-list .step-card:nth-child(3) { transition-delay: 0.2s; }
.steps-list .step-card:nth-child(4) { transition-delay: 0.3s; }