:root {
  --primary: #fff;
  --primary-dark: #111;
  --accent: #000;
  --bg: #fff;
  --card-bg: #f7f7f7;
  --card-bg-tint: #ececec;
  --text: #111;
  --text-light: #666;
  --shadow: 0 6px 32px rgba(0,0,0,0.10);
  --radius: 24px;
  --radius-sm: 14px;
  --transition: all 0.3s ease;
  --pricing-shadow: 0 2px 16px rgba(0,0,0,0.09);
  --pricing-btn-bg: #fff;
  --pricing-btn-bg-hover: #111;
  --pricing-btn-text: #111;
  --pricing-btn-text-hover: #fff;
  --popular-badge-bg: #111;
  --popular-badge-text: #fff;
  --plan-header: #111;
  --plan-price: #111;
  --plan-duration: #666;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: underline; }
a:hover { color: var(--primary-dark); }

.container {
  width: 100%;
  max-width: 1150px;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

/* NAVIGATION */
.navbar {
  background: var(--primary);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}
.logo-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.4rem;
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}
.logo span {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.01em;
}
nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}
nav a {
  text-decoration: none;
  color: var(--primary-dark);
  font-weight: 500;
  padding: 0.4em 1.1em;
  border-radius: 2rem;
  transition: var(--transition);
  font-size: 1.05rem;
  background: none;
}
nav a.active, nav a:hover {
  background: var(--card-bg);
  color: var(--accent);
}
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.7rem;
  cursor: pointer;
  color: var(--primary-dark);
  margin-left: 1rem;
}

/* LOGIN BUTTON */
.login-btn {
  background: #111;
  color: #fff;
  border: none;
  border-radius: 2rem;
  padding: 0.5rem 1.6rem;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
  outline: none;
}
.login-btn:hover,
.login-btn:focus {
  background: #fff;
  color: #111;
  border: 2px solid #111;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

/* HERO */
.hero-section {
  width: 100%;
  padding-top: 2.5rem;
  padding-bottom: 1.5rem;
  background: var(--card-bg-tint);
}
.hero-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.hero-text {
  flex: 1 1 350px;
  min-width: 320px;
}
.hero-text h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--primary-dark);
}
.hero-text .subtitle {
  font-size: 1.12rem;
  margin-bottom: 2.2rem;
  color: var(--text-light);
  max-width: 38em;
  line-height: 1.5;
}
.hero-buttons {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 0.7rem 2.2rem;
  border-radius: 2rem;
  border: 2px solid transparent;
  font-weight: 600;
  font-size: 1.07rem;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  background: var(--pricing-btn-bg);
  color: var(--pricing-btn-text);
}
.btn.primary {
  background: var(--pricing-btn-bg);
  color: var(--pricing-btn-text);
  border: 2px solid var(--pricing-btn-bg);
}
.btn.primary:hover,
.plan-btn.primary:hover {
  background: var(--pricing-btn-bg-hover);
  color: var(--pricing-btn-text-hover);
  border: 2px solid var(--pricing-btn-bg-hover);
}
.btn.secondary {
  background: transparent;
  border: 2px solid var(--pricing-btn-bg);
  color: var(--pricing-btn-text);
}
.btn.secondary:hover,
.plan-btn.secondary:hover {
  background: var(--pricing-btn-bg-hover);
  color: var(--pricing-btn-text-hover);
  border: 2px solid var(--pricing-btn-bg-hover);
}

/* HERO IMAGE */
.hero-image {
  flex: 1 1 320px;
  min-width: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-image img {
  width: 100%;
  max-width: 330px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--primary);
  filter: grayscale(1) contrast(1.1);
}

/* FEATURES */
.features-section {
  width: 100%;
  padding: 3.5rem 0 2.5rem 0;
  background: var(--bg);
}
.features-title {
  text-align: center;
  font-size: 2.2rem;
  color: var(--primary-dark);
  margin-bottom: 2.7rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: 0 3px 16px rgba(0,0,0,0.09);
  padding: 2.5rem 1.3rem 2rem 1.3rem;
  text-align: center;
  transition: var(--transition);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.feature-card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.13);
  transform: translateY(-6px) scale(1.02);
}
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1.3rem;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.7rem;
  color: var(--primary-dark);
}
.feature-card p {
  color: var(--text-light);
  font-size: 1rem;
}

/* PRICING SECTION */
.pricing-section {
  width: 100%;
  background: var(--card-bg-tint);
  padding: 3rem 0 2.5rem 0;
}
.pricing-title {
  text-align: center;
  font-size: 2.2rem;
  color: var(--primary-dark);
  margin-bottom: 2.2rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.pricing-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}
.pricing-card {
  background: var(--primary);
  border-radius: 2rem;
  box-shadow: var(--pricing-shadow);
  padding: 2.2rem 1.6rem 2.1rem 1.6rem;
  min-width: 330px;
  max-width: 350px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  margin-bottom: 1.5rem;
}

.pricing-card.popular {
  border: 3px solid var(--primary-dark);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: 20px;
  right: -36px;
  background: var(--popular-badge-bg);
  color: var(--popular-badge-text);
  padding: 0.4rem 2.5rem;
  border-radius: 2rem;
  transform: rotate(45deg);
  font-weight: 700;
  font-size: 0.88rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.10);
  letter-spacing: 0.05em;
}

.plan-header {
  text-align: center;
  font-size: 1.38rem;
  font-weight: 700;
  color: var(--plan-header);
  margin-bottom: 1.2rem;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--plan-price);
  margin-bottom: 0.7rem;
  letter-spacing: -0.02em;
}
.currency {
  font-size: 1.5rem;
  vertical-align: super;
  color: var(--plan-price);
}
.plan-duration {
  font-size: 1.2rem;
  color: var(--plan-duration);
  font-weight: 400;
  margin-left: 3px;
}
.plan-features {
  list-style: none;
  margin: 0 0 1.6rem 0;
  padding: 0;
  text-align: left;
  width: 100%;
}
.plan-features li {
  margin-bottom: 0.7em;
  color: var(--text);
  font-size: 1.08rem;
  display: flex;
  align-items: center;
  gap: 0.7em;
}
.plan-features i {
  color: #16a34a;
  font-size: 1.13rem;
}

.plan-btn {
  display: block;
  width: 80%;
  margin: 0 auto;
  padding: 0.7rem 0;
  border-radius: 2rem;
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--pricing-btn-bg);
  color: var(--pricing-btn-text);
  border: 2px solid var(--pricing-btn-bg);
  box-shadow: 0 4px 18px rgba(0,0,0,0.07);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.plan-btn.primary:hover {
  background: var(--pricing-btn-bg-hover);
  color: var(--pricing-btn-text-hover);
  border: 2px solid var(--pricing-btn-bg-hover);
}
.plan-btn.secondary {
  border: 2px solid var(--pricing-btn-bg);
  background: transparent;
  color: var(--pricing-btn-text);
}
.plan-btn.secondary:hover {
  background: var(--pricing-btn-bg-hover);
  color: var(--pricing-btn-text-hover);
  border: 2px solid var(--pricing-btn-bg-hover);
}

/* FOOTER */
footer {
  background: var(--card-bg);
  padding: 2.5rem 0 0 0;
  margin-top: 2.5rem;
  color: var(--text);
}
.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}
.footer-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2rem;
}
.footer-column h4 {
  font-size: 1.09rem;
  font-weight: 600;
  margin-bottom: 1.1rem;
  color: var(--primary-dark);
}
.footer-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.footer-column ul li a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 1rem;
  transition: var(--transition);
}
.footer-column ul li a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.footer-bottom {
  text-align: center;
  font-size: 0.98rem;
  padding-bottom: 1.5rem;
  color: var(--text-light);
  border-top: 1px solid #e4e4ea;
  padding-top: 1.1rem;
}
.footer-author {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.footer-author:hover { text-decoration: underline; }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .container { padding-left: 1.1rem; padding-right: 1.1rem; }
  .hero-container { gap: 1.5rem; }
  .pricing-grid { flex-direction: column; align-items: center; }
}
@media (max-width: 900px) {
  .navbar-content { flex-direction: column; align-items: flex-start; gap: 1rem; }
  nav { flex-wrap: wrap; gap: 1rem; width: 100%; padding-top: 0.5rem; }
}
@media (max-width: 700px) {
  .hero-container { flex-direction: column; align-items: flex-start; text-align: left; gap: 2rem; }
  .hero-image { width: 100%; justify-content: flex-start; }
  .features-title { font-size: 1.65rem; }
}
@media (max-width: 600px) {
  .navbar-content { padding: 0.7rem 0; }
  nav { flex-direction: column; align-items: flex-start; gap: 0.5rem; width: 100%; }
  .mobile-menu-btn { display: block; }
  nav { display: none; }
  nav.active { display: flex; background: #fff; position: absolute; top: 70px; left: 0; width: 100vw; box-shadow: 0 8px 32px rgba(0,0,0,0.13); padding: 1.5rem; z-index: 100; }
  .footer-columns { grid-template-columns: 1fr; gap: 1.5rem; }
  .container { padding-left: 0.5rem; padding-right: 0.5rem; }
  .pricing-card { min-width: 95vw; }
}