/* =========================================================
   Tippov Static Site — Main Stylesheet
   ========================================================= */

/* ---------- CSS Variables ---------- */
:root {
  --green:        #3d8a40;
  --green-dark:   #2a5c2e;
  --green-darker: #1a3820;
  --green-light:  #e8f5e9;
  --green-mid:    #c8e6c9;
  --white:        #ffffff;
  --off-white:    #f7faf7;
  --text:         #222e23;
  --text-light:   #5a6b5a;
  --border:       #dde8dd;
  --shadow:       rgba(30, 70, 35, 0.10);
  --radius:       10px;
  --transition:   0.25s ease;
  --max-w:        1160px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Open Sans', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: 'Poppins', sans-serif;
  line-height: 1.25;
}

/* ---------- Utilities ---------- */
.container {
  width: 90%;
  max-width: var(--max-w);
  margin: 0 auto;
}
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  border: none;
}
.btn-primary {
  background: var(--green);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--green-dark);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--white);
  color: var(--white);
}
.btn-outline:hover {
  background: var(--white);
  color: var(--green-dark);
}
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.5rem;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--text);
  margin-bottom: 0.75rem;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 620px;
}
.text-center { text-align: center; }
.text-center .section-sub { margin: 0 auto; }

/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--green-darker);
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1rem;
}
.nav-logo img {
  height: 42px;
  width: auto;
}
.nav-links {
  display: flex;
  gap: 0.25rem;
}
.nav-links a {
  color: rgba(255,255,255,0.85);
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: rgba(255,255,255,0.12);
  color: var(--white);
}
.nav-cta {
  background: var(--green);
  color: var(--white) !important;
  padding: 0.45rem 1.1rem !important;
}
.nav-cta:hover { background: var(--green-dark) !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  background: var(--green-darker);
  padding: 1rem 0 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  color: rgba(255,255,255,0.85);
  padding: 0.65rem 1.5rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--transition);
}
.mobile-menu a:hover { background: rgba(255,255,255,0.08); color: var(--white); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(145deg, var(--green-darker) 0%, var(--green-dark) 60%, #2f7035 100%);
  color: var(--white);
  padding: 80px 0 70px;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-text h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}
.hero-text h1 span { color: #82d987; }
.hero-text p {
  font-size: 1.1rem;
  opacity: 0.88;
  margin-bottom: 2rem;
  max-width: 520px;
  line-height: 1.7;
}
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-image {
  display: flex;
  justify-content: center;
  align-items: flex-end;
}
.hero-image img {
  max-height: 460px;
  width: auto;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.35));
  animation: float 4s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ---------- Features ---------- */
.features {
  background: var(--off-white);
  padding: 80px 0;
}
.features-header { margin-bottom: 3rem; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  border: 1px solid var(--border);
  box-shadow: 0 2px 10px var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow);
}
.feature-icon {
  width: 72px;
  height: 72px;
  object-fit: contain;
  margin-bottom: 1.25rem;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--green-dark);
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ---------- Benefits ---------- */
.benefits {
  padding: 80px 0;
  background: var(--white);
}
.benefits-header { margin-bottom: 3rem; }
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.benefit-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-radius: var(--radius);
  background: var(--green-light);
  transition: transform var(--transition);
}
.benefit-card:hover { transform: translateY(-4px); }
.benefit-icon {
  width: 90px;
  height: 90px;
  object-fit: contain;
  margin: 0 auto 1.25rem;
}
.benefit-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--green-dark);
  margin-bottom: 0.75rem;
}
.benefit-card p {
  font-size: 0.92rem;
  color: var(--text-light);
}

/* ---------- Stats ---------- */
.stats {
  background: linear-gradient(135deg, var(--green-dark), var(--green));
  padding: 70px 0;
  color: var(--white);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.stat-item {}
.stat-number {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
  color: #b2f0b6;
}
.stat-label {
  font-size: 0.9rem;
  opacity: 0.85;
  line-height: 1.4;
}

/* ---------- App Section ---------- */
.app-section {
  padding: 80px 0;
  background: var(--off-white);
}
.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.app-image img {
  border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}
.app-content .section-label { display: block; margin-bottom: 0.5rem; }
.app-content .section-title { margin-bottom: 1rem; }
.app-content p {
  color: var(--text-light);
  margin-bottom: 1.5rem;
}
.app-features {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}
.app-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.92rem;
}
.check-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  background: var(--green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
}

/* ---------- FAQ ---------- */
.faq {
  padding: 80px 0;
  background: var(--white);
}
.faq-header { margin-bottom: 3rem; }
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Poppins', sans-serif;
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--text);
  gap: 1rem;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--green-light); }
.faq-question.open { background: var(--green-light); color: var(--green-dark); }
.faq-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  transition: transform var(--transition);
  color: var(--green);
}
.faq-question.open .faq-chevron { transform: rotate(180deg); }
.faq-answer {
  display: none;
  padding: 0 1.5rem 1.5rem;
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.75;
}
.faq-answer.open { display: block; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--green-darker);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand img { height: 42px; margin-bottom: 1rem; }
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-family: 'Poppins', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
}
.footer-col ul li {
  font-size: 0.88rem;
  margin-bottom: 0.5rem;
}
.footer-col ul li a:hover { color: var(--white); text-decoration: underline; }
.footer-contact p {
  font-size: 0.88rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.footer-contact a:hover { color: var(--white); text-decoration: underline; }
.footer-bottom {
  padding: 1.25rem 0;
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-bottom a { opacity: 0.7; }
.footer-bottom a:hover { opacity: 1; }

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  background: linear-gradient(145deg, var(--green-darker), var(--green-dark));
  color: var(--white);
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  margin-bottom: 0.75rem;
}
.page-hero p {
  font-size: 1.05rem;
  opacity: 0.85;
  max-width: 540px;
  margin: 0 auto;
}

/* ---------- Contact Page ---------- */
.contact-section { padding: 80px 0; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-info h2 { font-size: 1.6rem; margin-bottom: 1rem; color: var(--green-dark); }
.contact-info p { color: var(--text-light); margin-bottom: 1.5rem; }
.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.contact-detail-icon {
  width: 44px;
  height: 44px;
  background: var(--green-light);
  border-radius: 10px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green);
  font-size: 1.1rem;
}
.contact-detail-text strong {
  display: block;
  font-family: 'Poppins', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}
.contact-detail-text span {
  font-size: 0.9rem;
  color: var(--text-light);
}
.contact-form {
  background: var(--off-white);
  border-radius: var(--radius);
  padding: 2.5rem;
  border: 1px solid var(--border);
}
.contact-form h3 {
  font-size: 1.2rem;
  color: var(--green-dark);
  margin-bottom: 1.5rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: 'Poppins', sans-serif;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: 'Open Sans', sans-serif;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--white);
  transition: border-color var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--green); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* ---------- Gallery Page ---------- */
.gallery-section { padding: 80px 0; }
.gallery-intro { margin-bottom: 3rem; }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--off-white);
  border: 1px solid var(--border);
  box-shadow: 0 2px 10px var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px var(--shadow);
}
.gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: contain;
  padding: 1.5rem;
  background: var(--white);
}
.gallery-item-label {
  padding: 0.85rem 1rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-dark);
  text-align: center;
  border-top: 1px solid var(--border);
}

/* ---------- About Page ---------- */
.about-section { padding: 80px 0; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 4rem;
}
.about-text .section-title { margin-bottom: 1rem; }
.about-text p {
  color: var(--text-light);
  margin-bottom: 1rem;
}
.about-image img {
  border-radius: var(--radius);
  box-shadow: 0 10px 30px var(--shadow);
}
.about-services {
  background: var(--green-light);
  border-radius: var(--radius);
  padding: 3rem;
  text-align: center;
}
.about-services h2 {
  font-size: 1.6rem;
  color: var(--green-dark);
  margin-bottom: 0.5rem;
}
.about-services > p {
  color: var(--text-light);
  margin-bottom: 2rem;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}
.service-chip {
  background: var(--white);
  border-radius: 50px;
  padding: 0.6rem 1rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green-dark);
  border: 1px solid var(--green-mid);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: 1fr; }
  .app-image { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}
/* Nav collapses to hamburger at 768px */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .gallery-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 50px 0 40px; }
  .hero-buttons { flex-direction: column; align-items: flex-start; }
}