@import url('variables.css');

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-600);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--color-primary);
  line-height: 1.2;
  font-weight: 600;
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: 700;
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: 0.75rem;
}

h3 {
  font-size: var(--font-size-xl);
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-header p {
  margin-bottom: 0;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

section:nth-child(even) {
  background-color: var(--color-gray-100);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-white {
  background-color: var(--color-white);
  color: var(--color-primary);
}

.btn-white:hover {
  background-color: var(--color-gray-100);
  transform: translateY(-1px);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo img {
  height: var(--logo-height-header);
  width: auto;
  max-width: min(280px, 55vw);
  object-fit: contain;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
}

.nav-toggle-label span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-accent);
}

.nav-links a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Hero */
.hero {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 50%, var(--color-accent-light) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-content p {
  font-size: var(--font-size-lg);
  margin-bottom: 2rem;
  color: var(--color-gray-600);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: stretch;
  width: 100%;
}

.hero-devices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  width: 100%;
  max-width: 520px;
}

.hero-device {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.hero-device:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(44, 71, 107, 0.15);
}

.hero-device-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-100);
  border-radius: var(--radius);
  margin-bottom: 0.875rem;
  overflow: hidden;
}

.hero-device-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 0.75rem;
}

.hero-device figcaption {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card-image {
  background-color: var(--color-gray-100);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 1.5rem;
}

.product-card-body {
  padding: 1.75rem;
}

.product-card-body > p {
  font-size: var(--font-size-sm);
  margin-bottom: 1.25rem;
}

.product-features {
  margin-bottom: 1.25rem;
}

.product-features li {
  position: relative;
  padding-left: 1.25rem;
  font-size: var(--font-size-sm);
  margin-bottom: 0.5rem;
}

.product-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.spec-tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  padding: 0.3rem 0.65rem;
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark);
  border-radius: 999px;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background-color: var(--color-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: var(--font-size-lg);
}

.feature-card p {
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* About */
.about-section {
  background-color: var(--color-white) !important;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-visual img {
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  object-fit: contain;
}

.about-content h2 {
  margin-bottom: 1rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background-color: var(--color-gray-100);
  border-radius: var(--radius);
}

.stat-item strong {
  display: block;
  font-size: var(--font-size-2xl);
  color: var(--color-accent);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-item span {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

/* Contact */
.contact-section {
  background-color: var(--color-gray-100) !important;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.contact-info h2 {
  margin-bottom: 1rem;
}

.contact-details {
  margin-top: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.contact-item-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background-color: var(--color-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.contact-item strong {
  display: block;
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  margin-bottom: 0.15rem;
}

.contact-item span,
.contact-item a {
  font-size: var(--font-size-sm);
}

.contact-item a:hover {
  color: var(--color-accent);
}

.contact-form-wrapper {
  background: var(--color-white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  color: var(--color-gray-800);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 150, 71, 0.15);
}

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

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-brand img {
  height: var(--logo-height-footer);
  width: auto;
  max-width: 260px;
  object-fit: contain;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: var(--font-size-sm);
  max-width: 280px;
  margin-bottom: 0;
}

.footer-links h4 {
  color: var(--color-white);
  font-size: var(--font-size-base);
  margin-bottom: 1rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: var(--font-size-sm);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
  font-size: var(--font-size-sm);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: background-color var(--transition);
}

.footer-social a:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* Responsive — Tablet (768px+) */
@media (min-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr 1fr;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr 1.2fr;
    grid-template-rows: auto auto;
    align-items: start;
  }

  .about-visual {
    grid-row: 1 / 3;
    align-self: center;
  }

  .about-stats {
    grid-column: 2;
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

@media (min-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Responsive — Mobile nav */
@media (max-width: 767px) {
  .nav-toggle-label {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    gap: 1.5rem;
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav-links a {
    font-size: var(--font-size-base);
    display: block;
    width: 100%;
    padding: 0.5rem 0;
  }

  .main-nav .btn {
    width: 100%;
    text-align: center;
  }

  .nav-toggle:checked ~ .main-nav {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-devices {
    grid-template-columns: 1fr;
    max-width: 320px;
    margin: 0 auto;
  }

  .logo img {
    height: 48px;
    max-width: min(240px, 70vw);
  }
}