/* ============================================================
   Kassowary Technologies — Main Stylesheet
   Brand Colors: #1800ac (Deep Blue), #3095b4 (Teal), #1F497D
   ============================================================ */

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

:root {
  --color-primary: #1800ac;
  --color-primary-light: #2a1ad0;
  --color-primary-dark: #11007a;
  --color-teal: #3095b4;
  --color-teal-light: #4BACC6;
  --color-navy: #1F497D;
  --color-navy-light: #4F81BD;
  --color-dark: #21201f;
  --color-gray-900: #1a1a2e;
  --color-gray-800: #2d2d44;
  --color-gray-600: #6b7280;
  --color-gray-400: #9ca3af;
  --color-gray-200: #e5e7eb;
  --color-gray-100: #f3f4f6;
  --color-gray-50: #f9fafb;
  --color-white: #ffffff;
  --color-beige: #EEECE1;
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-dark);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

ul {
  list-style: none;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  color: var(--color-gray-900);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-primary);
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

.btn--primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: box-shadow var(--transition);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
}

.header__logo-img {
  height: 40px;
  width: auto;
}

.header__logo-text {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.nav__list {
  display: flex;
  gap: 36px;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray-600);
  position: relative;
  padding: 4px 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav__link:hover {
  color: var(--color-primary);
}

.nav__link:hover::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger--active .hamburger__bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger--active .hamburger__bar:nth-child(2) {
  opacity: 0;
}

.hamburger--active .hamburger__bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-navy) 40%, var(--color-teal) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(48, 149, 180, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 150%;
  background: radial-gradient(ellipse, rgba(24, 0, 172, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 0 80px;
}

.hero__tagline {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: rgba(255, 255, 255, 0.75);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.4), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* --- About --- */
.about {
  background: var(--color-gray-50);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.about__card {
  background: var(--color-white);
  padding: 36px 28px;
  border-radius: 12px;
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition);
}

.about__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.about__card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: rgba(24, 0, 172, 0.08);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.about__card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 10px;
}

.about__card p {
  font-size: 0.95rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

.about__stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat__number {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat__label {
  font-size: 0.85rem;
  color: var(--color-gray-600);
  font-weight: 500;
}

/* --- Products --- */
.products {
  background: var(--color-white);
}

/* Featured Product */
.product-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-navy) 100%);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 48px;
  position: relative;
}

.product-featured__badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--color-teal);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  z-index: 1;
}

.product-featured__content {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.product-featured::after {
  content: '';
  background: linear-gradient(135deg, rgba(48, 149, 180, 0.2) 0%, rgba(24, 0, 172, 0.1) 100%);
  pointer-events: none;
}

.product-featured__category {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal-light);
  margin-bottom: 12px;
}

.product-featured__title {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-white);
  margin-bottom: 16px;
  line-height: 1.1;
}

.product-featured__desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 24px;
}

.product-featured__features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.product-featured__features li {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  padding-left: 20px;
  position: relative;
}

.product-featured__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-teal-light);
  font-weight: 700;
}

/* Product Grid */
.products__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--color-gray-50);
  border-radius: 12px;
  padding: 32px 24px;
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition);
}

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

.product-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(48, 149, 180, 0.1);
  color: var(--color-teal);
  margin-bottom: 16px;
}

.product-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.9rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* --- Contact --- */
.contact {
  background: var(--color-gray-50);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact__item svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.contact__item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 4px;
}

.contact__item p,
.contact__item a {
  font-size: 0.95rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

.contact__item a:hover {
  color: var(--color-primary);
}

.contact__form {
  background: var(--color-white);
  padding: 36px;
  border-radius: 12px;
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-primary);
  border: 1.5px solid var(--color-gray-200);
  border-radius: 8px;
  background: var(--color-gray-50);
  color: var(--color-dark);
  transition: all var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(24, 0, 172, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-gray-400);
}

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

/* --- Footer --- */
.footer {
  background: var(--color-gray-900);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__logo {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--color-white);
  display: block;
  margin-bottom: 12px;
}

.footer__brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer__links h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--color-teal-light);
}

.footer__bottom {
  padding: 24px 0;
  text-align: center;
}

.footer__bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Form Success Message --- */
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success--visible {
  display: block;
}

.form-success__icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.form-success h3 {
  color: var(--color-gray-900);
  margin-bottom: 8px;
}

.form-success p {
  color: var(--color-gray-600);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-featured {
    grid-template-columns: 1fr;
  }

  .product-featured__content {
    padding: 36px 28px;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-white);
    padding: 100px 32px 32px;
    transition: right var(--transition);
    box-shadow: var(--shadow-xl);
    z-index: 1000;
  }

  .nav--open {
    right: 0;
  }

  .nav__list {
    flex-direction: column;
    gap: 8px;
  }

  .nav__link {
    display: block;
    padding: 12px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--color-gray-100);
  }

  .hamburger {
    display: flex;
  }

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

  .about__stats {
    gap: 32px;
  }

  .product-featured__features {
    grid-template-columns: 1fr;
  }

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

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .product-featured__content {
    padding: 28px 20px;
  }

  .product-featured__title {
    font-size: 1.8rem;
  }

  .contact__form {
    padding: 24px 20px;
  }

  .stat__number {
    font-size: 1.6rem;
  }
}