:root {
  --primary-deep: #0a2240;
  --aqua-vibrant: #00b4d8;
  --aqua-light: #90e0ef;
  --dark-neutral: #1d2d44;
  --light-bg: #f8f9fa;
  --pure-white: #ffffff;
  --error-red: #e63946;
  --success-green: #2a9d8f;
  --text-dark: #2b2d42;
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: var(--light-bg); color: var(--text-dark); line-height: 1.6; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }
.loader-container { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background-color: var(--primary-deep); z-index: 9999; display: flex; justify-content: center; align-items: center; transition: opacity 0.5s ease, visibility 0.5s; }
.loader-hidden { opacity: 0; visibility: hidden; }
.aqua-spinner { width: 50px; height: 50px; border: 5px solid var(--dark-neutral); border-top-color: var(--aqua-vibrant); border-radius: 50%; animation: spin 1s infinite linear; }
@keyframes spin { to { transform: rotate(360deg); } }
.navbar { background-color: var(--primary-deep); padding: 1rem 0; position: sticky; top: 0; z-index: 1000; box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.nav-container { display: flex; justify-content: space-between; align-items: center; width: 90%; max-width: 1200px; margin: 0 auto; }
.nav-logo { color: var(--pure-white); font-size: 1.5rem; font-weight: 700; text-decoration: none; display: flex; align-items: center; gap: 0.5rem; }
.nav-logo i { color: var(--aqua-vibrant); }
.nav-menu { display: flex; align-items: center; list-style: none; gap: 2rem; }
.nav-menu a { color: var(--light-bg); text-decoration: none; font-weight: 500; transition: var(--transition-smooth); padding-bottom: 4px; }
.nav-menu a:hover, .nav-menu a.active { color: var(--aqua-vibrant); border-bottom: 2px solid var(--aqua-vibrant); }
.cart-icon-btn { position: relative; }
.cart-badge { position: absolute; top: -12px; right: -15px; background-color: var(--aqua-vibrant); color: var(--primary-deep); font-size: 0.75rem; font-weight: 700; padding: 2px 7px; border-radius: 50%; }
.hamburger { display: none; cursor: pointer; }
.bar { display: block; width: 25px; height: 3px; margin: 5px auto; background-color: var(--pure-white); transition: var(--transition-smooth); }
.hero-section { height: 80vh; display: flex; align-items: center; justify-content: center; text-align: center; color: var(--pure-white); padding: 0 1rem; }
.hero-content h1 { font-size: 3.5rem; margin-bottom: 1rem; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; }
.hero-content p { font-size: 1.25rem; max-width: 700px; margin: 0 auto 2rem auto; color: var(--aqua-light); }
.btn { display: inline-block; padding: 0.75rem 2rem; border: none; border-radius: 4px; font-weight: 600; cursor: pointer; text-decoration: none; transition: var(--transition-smooth); }
.btn-primary { background-color: var(--aqua-vibrant); color: var(--primary-deep); }
.btn-primary:hover { background-color: var(--pure-white); transform: translateY(-3px); box-shadow: 0 4px 15px rgba(0, 180, 216, 0.4); }
.btn-block { width: 100%; display: block; text-align: center; }
.page-header { text-align: center; padding: 4rem 1rem; color: var(--pure-white); margin-bottom: 2rem; }
.page-header h1 { font-size: 2.5rem; }
.features { padding: 4rem 0; background: var(--pure-white); text-align: center; }
.features .container { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.feature-card { padding: 2rem; background: var(--light-bg); border-radius: 8px; transition: var(--transition-smooth); }
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.05); }
.feature-card i { font-size: 2.5rem; color: var(--aqua-vibrant); margin-bottom: 1rem; }
.mv-blocks { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin: 2rem 0; }
.mv-card, .quality-assurance { background: var(--pure-white); padding: 2rem; border-left: 4px solid var(--aqua-vibrant); border-radius: 4px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.quality-assurance { margin-top: 2rem; }
.contact-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 3rem; margin-bottom: 4rem; }
.form-control { margin-bottom: 1.5rem; position: relative; }
.form-control label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
.form-control input, .form-control textarea { width: 100%; padding: 0.75rem; border: 1px solid #ccc; border-radius: 4px; background: var(--pure-white); font-size: 1rem; }
.form-control.invalid input, .form-control.invalid textarea { border-color: var(--error-red); }
.error-msg { color: var(--error-red); font-size: 0.85rem; display: none; margin-top: 0.25rem; }
.form-control.invalid .error-msg { display: block; }
.form-success-alert { display: none; background: var(--success-green); color: white; padding: 1rem; border-radius: 4px; margin-top: 1rem; text-align: center; }
.contact-info { background: var(--primary-deep); color: white; padding: 2rem; border-radius: 8px; }
.info-item { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }
.info-item i { color: var(--aqua-vibrant); font-size: 1.2rem; }
#scrollTopBtn { display: none; position: fixed; bottom: 20px; right: 30px; z-index: 99; border: none; outline: none; background-color: var(--aqua-vibrant); color: var(--primary-deep); cursor: pointer; padding: 15px; border-radius: 50%; font-size: 18px; transition: var(--transition-smooth); }
#scrollTopBtn:hover { background-color: var(--primary-deep); color: white; }
.footer { background-color: var(--primary-deep); color: var(--pure-white); text-align: center; padding: 2rem 0; margin-top: 4rem; border-top: 3px solid var(--aqua-vibrant); }
.fade-in { animation: fadeIn 1s ease-out forwards; }
.fade-in-delayed { opacity: 0; animation: fadeIn 1s ease-out 0.5s forwards; }
@keyframes fadeIn { to { opacity: 1; transform: translateY(0); } }