/*
 * Global Stylesheet for 1ngle Solutions
 *
 * Color palette inspired by modern tech brands: deep blues and greens with
 * bright yellow accents. See design guidelines in the user document for
 * context on tone and messaging【653336282107915†L16-L31】.
 */

:root {
  --color-primary: #0d3b66; /* dark blue */
  --color-secondary: #2a9d8f; /* teal */
  --color-accent: #e9c46a; /* golden yellow */
  --color-light: #f7fafc; /* light background */
  --color-dark: #1a202c; /* dark for footer and cards */
  --color-text: #2d3748; /* default text */
  --container-width: 1100px;
  --transition-fast: 0.3s;
}

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

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-light);
  scroll-behavior: smooth;
}

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

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

/* Container utility */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header & Navigation */
header {
  background: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: #fff;
  font-weight: 500;
  position: relative;
}

nav a:hover::after,
nav a.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
}

/* Mobile menu */
.mobile-menu-icon {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  width: 100%;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  overflow: hidden;
  text-align: center;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
  filter: brightness(0.4);
}

.hero-content {
  max-width: 700px;
  padding: 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  transition: background var(--transition-fast);
  display: inline-block;
}

.btn-primary:hover {
  background: #f4d68d;
}

/* Quick Info */
.quick-info {
  padding: 3rem 0;
  background: #fff;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.info-item {
  background: var(--color-primary);
  color: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  text-align: center;
  transition: transform var(--transition-fast) ease;
}

.info-item i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--color-accent);
}

.info-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.info-item p {
  font-size: 0.95rem;
  line-height: 1.4;
}

.info-item:hover {
  transform: translateY(-4px);
}

/* Section headings */
.section {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--color-primary);
}

/* About page */
.about-section {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  align-items: center;
}

.about-content {
  flex: 1 1 350px;
}

.about-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.about-content p {
  margin-bottom: 1rem;
  text-align: justify;
}

.about-list {
  margin-top: 1rem;
  list-style: none;
}

.about-list li {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.4rem;
}

.about-list li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  color: var(--color-secondary);
}

.about-image {
  flex: 1 1 350px;
  border-radius: 10px;
  overflow: hidden;
}

/* Smart Home page */
.accordion {
  width: 100%;
  border-radius: 6px;
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid #e2e8f0;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
}

.accordion-header h3 {
  font-size: 1.25rem;
}

.accordion-header i {
  transition: transform var(--transition-fast);
}

.accordion-header.active i {
  transform: rotate(180deg);
}

.accordion-content {
  background: #fff;
  padding: 1rem 1.5rem;
  display: none;
  animation: fadeIn var(--transition-fast) ease;
}

.accordion-content img {
  width: 100%;
  border-radius: 6px;
  margin-top: 1rem;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Technology page */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.tech-card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform var(--transition-fast);
}

.tech-card:hover {
  transform: translateY(-4px);
}

.tech-card-header {
  background: var(--color-secondary);
  color: #fff;
  padding: 1rem;
  font-weight: 600;
}

.tech-card-body {
  padding: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Benefits page */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.benefit-item {
  background: var(--color-primary);
  color: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  text-align: center;
  transition: transform var(--transition-fast);
}

.benefit-item i {
  font-size: 2rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.benefit-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.benefit-item p {
  font-size: 0.9rem;
}

.benefit-item:hover {
  transform: translateY(-4px);
}

/* Forms */
form {
  display: grid;
  gap: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

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

form label {
  margin-bottom: 0.3rem;
  font-weight: 500;
  color: var(--color-primary);
}

form input,
form select,
form textarea {
  padding: 0.6rem;
  border: 1px solid #cbd5e0;
  border-radius: 4px;
  font-size: 1rem;
}

form input:focus,
form select:focus,
form textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
}

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

form button {
  background: var(--color-secondary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-top: 0.5rem;
}

form button:hover {
  background: #24927a;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Footer */
footer {
  background: var(--color-primary);
  color: #fff;
  padding: 2rem 0;
  margin-top: 4rem;
}

footer .footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

footer .footer-links a {
  color: #fff;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

footer .social-icons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1rem;
}

footer .social-icons a {
  color: #fff;
  font-size: 1.5rem;
  transition: color var(--transition-fast);
}

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

footer .third-party {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

footer .third-party i {
  font-size: 1.5rem;
  color: var(--color-accent);
}

footer p {
  text-align: center;
  font-size: 0.8rem;
}

/* Footnotes */
.footnotes {
  font-size: 0.75rem;
  margin-top: 2rem;
  color: #718096;
}

.footnotes a {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Responsive behavior */
@media (max-width: 768px) {
  nav ul {
    position: absolute;
    top: 70px;
    right: 0;
    background: var(--color-primary);
    flex-direction: column;
    width: 200px;
    padding: 1rem;
    display: none;
    box-shadow: -2px 2px 6px rgba(0,0,0,0.3);
  }
  nav ul.show {
    display: flex;
  }
  .mobile-menu-icon {
    display: block;
    color: #fff;
  }
  .about-section {
    flex-direction: column;
  }
}

@media (max-width: 500px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero p {
    font-size: 1rem;
  }
}