/* ============================================================
   Brightest Hope v2 — JEG Blue Theme
   ============================================================ */
@import url('https://api.fontshare.com/v2/css?f[]=general-sans@400,500,600,700&display=swap');

:root {
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-display: 'General Sans', 'Helvetica Neue', sans-serif;
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;
  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-xl: 1rem; --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-wide: 1200px;
}

/* --- Light Mode (JEG Blue #5A9BD5) --- */
:root, [data-theme="light"] {
  --color-bg: #f4f7fb;
  --color-surface: #ffffff;
  --color-surface-2: #eef3f9;
  --color-surface-offset: #e4ecf5;
  --color-divider: #cdd8e6;
  --color-border: #b8c8db;
  --color-text: #1a2a3a;
  --color-text-muted: #546a80;
  --color-text-faint: #8fa3b8;
  --color-text-inverse: #ffffff;
  --color-primary: #4a8ec8;
  --color-primary-hover: #3d7ab2;
  --color-primary-active: #2f6699;
  --color-primary-light: #e8f1fa;
  --color-accent-red: #e02020;
  --shadow-sm: 0 1px 2px rgba(26,42,58,0.06);
  --shadow-md: 0 4px 12px rgba(26,42,58,0.08);
  --shadow-lg: 0 12px 32px rgba(26,42,58,0.12);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --color-bg: #0e1520;
  --color-surface: #141e2c;
  --color-surface-2: #1a2838;
  --color-surface-offset: #172333;
  --color-divider: #253546;
  --color-border: #304560;
  --color-text: #c8d6e5;
  --color-text-muted: #7e96ad;
  --color-text-faint: #4f6578;
  --color-text-inverse: #0e1520;
  --color-primary: #6aafe0;
  --color-primary-hover: #5a9dd0;
  --color-primary-active: #4a8bbf;
  --color-primary-light: #1a2838;
  --color-accent-red: #f04040;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e1520; --color-surface: #141e2c; --color-surface-2: #1a2838;
    --color-surface-offset: #172333; --color-divider: #253546; --color-border: #304560;
    --color-text: #c8d6e5; --color-text-muted: #7e96ad; --color-text-faint: #4f6578;
    --color-text-inverse: #0e1520; --color-primary: #6aafe0; --color-primary-hover: #5a9dd0;
    --color-primary-active: #4a8bbf; --color-primary-light: #1a2838; --color-accent-red: #f04040;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.25); --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.45);
  }
}

/* ============================================================ Layout */
.container { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.section { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); }

/* ============================================================ Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s cubic-bezier(0.16,1,0.3,1);
}
.header--scrolled { box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.logo { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); }
.logo-img { height: 48px; width: auto; object-fit: contain; }

.nav { display: flex; align-items: center; gap: var(--space-8); }
.nav-links { display: flex; list-style: none; gap: var(--space-6); }
.nav-links a {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  text-decoration: none; position: relative;
  transition: color var(--transition-interactive);
}
.nav-links a:hover, .nav-links a.active { color: var(--color-primary); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--color-primary); transition: width var(--transition-interactive);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.theme-toggle {
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md); color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }

.mobile-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; color: var(--color-text); }
.mobile-nav {
  display: none; position: fixed; top: 72px; left: 0; right: 0; bottom: 0;
  background: var(--color-bg); z-index: 99; padding: var(--space-8) var(--space-6);
}
.mobile-nav.open { display: flex; flex-direction: column; gap: var(--space-6); }
.mobile-nav a { font-size: var(--text-lg); font-weight: 600; color: var(--color-text); text-decoration: none; padding: var(--space-3) 0; border-bottom: 1px solid var(--color-divider); }

/* ============================================================ Hero */
.hero { position: relative; min-height: 85vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(14,21,32,0.88) 0%, rgba(14,21,32,0.55) 50%, rgba(14,21,32,0.35) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: 700px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(90,155,213,0.15); border: 1px solid rgba(90,155,213,0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs); font-weight: 600; color: #7dbce8;
  margin-bottom: var(--space-6); letter-spacing: 0.05em;
}
.hero h1 {
  font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 700;
  color: #fff; letter-spacing: -0.03em; margin-bottom: var(--space-6); line-height: 1.1;
}
.hero p { font-size: var(--text-base); color: rgba(255,255,255,0.75); line-height: 1.7; margin-bottom: var(--space-8); max-width: 560px; }
.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

/* ============================================================ Buttons */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-md);
  font-size: var(--text-sm); font-weight: 600; text-decoration: none; cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive),
              transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.3); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.5); }
.btn-outline-dark { background: transparent; color: var(--color-primary); border: 1px solid var(--color-primary); }
.btn-outline-dark:hover { background: var(--color-primary-light); }
.btn-white { background: #fff; color: var(--color-primary); font-weight: 600; }
.btn-white:hover { background: rgba(255,255,255,0.9); box-shadow: var(--shadow-lg); }

/* ============================================================ Stats */
.stats-bar { background: var(--color-surface); border-bottom: 1px solid var(--color-divider); padding-block: var(--space-10); }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-8); text-align: center; }
.stat-number { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: var(--color-primary); line-height: 1.1; margin-bottom: var(--space-1); }
.stat-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 500; }

/* ============================================================ Section Headers */
.section-label { font-size: var(--text-xs); font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-3); }
.section-title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-text); letter-spacing: -0.02em; margin-bottom: var(--space-6); }
.section-header { text-align: center; max-width: 600px; margin-inline: auto; margin-bottom: var(--space-12); }
.section-header p { font-size: var(--text-base); color: var(--color-text-muted); margin-inline: auto; }

/* ============================================================ About */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.about-image { border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 16/10; }
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-text p { font-size: var(--text-base); color: var(--color-text-muted); margin-bottom: var(--space-4); line-height: 1.7; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-top: var(--space-6); }
.about-feature { display: flex; align-items: flex-start; gap: var(--space-3); }
.about-feature-icon { width: 22px; height: 22px; flex-shrink: 0; color: var(--color-primary); margin-top: 2px; }
.about-feature-text { font-size: var(--text-sm); font-weight: 500; color: var(--color-text); }

/* ============================================================ Brands Section */
.brands-section { background: var(--color-surface); border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider); }
.brands-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-6); }
.brand-card {
  background: var(--color-bg); border: 1px solid var(--color-divider); border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6); text-align: center;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.brand-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.brand-card-logo { height: 48px; width: auto; max-width: 180px; object-fit: contain; margin: 0 auto var(--space-5); background: #fff; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
.brand-card-name { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-2); }
.brand-card-desc { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.5; }

/* ============================================================ Products */
.products-section { background: var(--color-surface-2); }
.products-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-6); }
.product-card {
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.product-card-image { aspect-ratio: 4/3; overflow: hidden; background: var(--color-surface-offset); }
.product-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s cubic-bezier(0.16,1,0.3,1); }
.product-card:hover .product-card-image img { transform: scale(1.05); }
.product-card-body { padding: var(--space-6); }
.product-card-tag {
  display: inline-block; font-size: var(--text-xs); font-weight: 600; color: var(--color-primary);
  background: var(--color-primary-light); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); margin-bottom: var(--space-3);
}
.product-card-title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-3); }
.product-card-desc { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; margin-bottom: var(--space-4); }
.product-card-specs { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.spec-badge { font-size: var(--text-xs); color: var(--color-text-muted); background: var(--color-surface-2); padding: var(--space-1) var(--space-2); border-radius: var(--radius-sm); border: 1px solid var(--color-divider); }
.product-icon-placeholder { width: 80px; height: 80px; color: var(--color-primary); opacity: 0.5; }

/* ============================================================ Applications */
.applications-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--space-6); }
.app-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4/3; cursor: default; }
.app-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s cubic-bezier(0.16,1,0.3,1); }
.app-card:hover img { transform: scale(1.08); }
.app-card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(14,21,32,0.9) 0%, transparent 60%);
  display: flex; flex-direction: column; justify-content: flex-end; padding: var(--space-6);
}
.app-card-title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; color: #fff; margin-bottom: var(--space-2); }
.app-card-desc { font-size: var(--text-sm); color: rgba(255,255,255,0.7); line-height: 1.5; }

/* ============================================================ Advantages */
.advantages-section { background: var(--color-surface-2); }
.advantages-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-6); }
.advantage-card {
  background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg);
  padding: var(--space-8); text-align: center;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.advantage-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.advantage-icon {
  width: 56px; height: 56px; margin: 0 auto var(--space-5);
  background: var(--color-primary-light); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center; color: var(--color-primary);
}
.advantage-title { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-3); }
.advantage-desc { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; }

/* ============================================================ CTA */
.cta-section {
  background: linear-gradient(135deg, #3a7db8 0%, #5a9bd5 50%, #4a8ec8 100%);
  text-align: center; padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.cta-section h2 { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: #fff; letter-spacing: -0.02em; margin-bottom: var(--space-4); }
.cta-section p { font-size: var(--text-base); color: rgba(255,255,255,0.85); margin-bottom: var(--space-8); margin-inline: auto; }

/* ============================================================ Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); }
.contact-info-list { display: flex; flex-direction: column; gap: var(--space-6); margin-top: var(--space-6); }
.contact-info-item { display: flex; gap: var(--space-4); }
.contact-info-icon {
  width: 48px; height: 48px; flex-shrink: 0; background: var(--color-primary-light);
  border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; color: var(--color-primary);
}
.contact-info-content h4 { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-1); }
.contact-info-content p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.5; }
.contact-form { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); padding: var(--space-8); }
.form-group { margin-bottom: var(--space-5); }
.form-group label { display: block; font-size: var(--text-sm); font-weight: 500; color: var(--color-text); margin-bottom: var(--space-2); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: var(--space-3) var(--space-4); background: var(--color-bg);
  border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--text-sm);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(90,155,213,0.15); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

/* ============================================================ Footer */
.footer { background: var(--color-surface); border-top: 1px solid var(--color-divider); padding-block: var(--space-12); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-8); }
.footer-brand p { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-4); line-height: 1.6; max-width: 300px; }
.footer-col h4 { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-4); }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; transition: color var(--transition-interactive); }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom { margin-top: var(--space-10); padding-top: var(--space-6); border-top: 1px solid var(--color-divider); display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p, .footer-bottom a { font-size: var(--text-xs); color: var(--color-text-faint); text-decoration: none; }
.footer-bottom a:hover { color: var(--color-primary); }

/* ============================================================ Animations */
.fade-in { opacity: 0; transition: opacity 0.6s cubic-bezier(0.16,1,0.3,1); }
.fade-in.visible { opacity: 1; }

/* ============================================================ Responsive */
@media (max-width: 1024px) {
  .products-grid, .applications-grid { grid-template-columns: repeat(2,1fr); }
  .advantages-grid, .brands-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .theme-toggle.desktop { display: none; }
  .mobile-toggle { display: flex; }
  .header-inner { height: 60px; }
  .logo-img { height: 38px; }
  .mobile-nav { top: 60px; }
  .hero { min-height: 70vh; }
  .hero h1 { font-size: var(--text-2xl); }
  .stats-grid { grid-template-columns: repeat(2,1fr); gap: var(--space-6); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .products-grid, .applications-grid, .advantages-grid, .brands-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-3); text-align: center; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; justify-content: center; }
}