/* ========================================
   Aquana Landing Page - Styles
   ======================================== */

:root {
  --navy: #0A1F3D;
  --navy-dark: #061428;
  --navy-overlay: rgba(10, 31, 61, 0.72);
  --cyan: #4FC3E8;
  --cyan-glow: rgba(79, 195, 232, 0.35);
  --white: #ffffff;
  --card-bg: rgba(10, 31, 61, 0.55);
  --card-border: rgba(79, 195, 232, 0.45);
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--white);
  background-color: var(--navy-dark);
  overflow-x: hidden;
}

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

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

/* ========================================
   Header
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  padding: 1.25rem 2.5rem;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

.header__logo img {
  height: 144px;
  width: auto;
}

.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 110;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.header__hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.header__hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.header__link {
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.header__link:hover {
  color: var(--cyan);
}

.header__separator {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.85rem;
  user-select: none;
}

.header__login {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 1rem;
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.header__login:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--white);
}

.header__login-icon {
  flex-shrink: 0;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url('../assets/hero-bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: var(--navy-overlay);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1.5rem;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.2;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1.2s ease forwards 0.3s;
}

.hero__divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 1.75rem;
  opacity: 0;
  animation: fadeIn 1s ease forwards 0.9s;
}

.hero__divider-line {
  display: block;
  width: 120px;
  height: 1px;
  background: rgba(255, 255, 255, 0.6);
}

.hero__droplet {
  color: var(--white);
  margin: 0 0.5rem;
  flex-shrink: 0;
}

/* ========================================
   Cards Section
   ======================================== */

.cards {
  position: relative;
  margin-top: -120px;
  padding: 0 2rem 4rem;
  z-index: 10;
}

.cards__inner {
  display: flex;
  justify-content: center;
  gap: 2rem;
  max-width: 700px;
  margin: 0 auto;
}

.card {
  flex: 1;
  max-width: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  padding: 2.5rem 2rem 2rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.2),
    inset 0 -30px 40px -20px var(--cyan-glow);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  cursor: pointer;
  scroll-margin-top: 100px;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 0 20px var(--cyan-glow),
    inset 0 -30px 40px -20px var(--cyan-glow);
}

.card__icon {
  color: var(--cyan);
}

.card__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

/* Scroll reveal */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.scroll-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.scroll-reveal:nth-child(2) {
  transition-delay: 0.15s;
}

/* ========================================
   Inquiry Popup
   ======================================== */

.inquiry-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 20, 40, 0.5);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.inquiry-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.inquiry-popup {
  position: fixed;
  top: 50%;
  right: 2.5rem;
  transform: translateY(-50%) translateX(120%);
  z-index: 210;
  width: 320px;
  padding: 1.75rem 1.5rem 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.35),
    inset 0 -20px 30px -15px var(--cyan-glow);
  opacity: 0;
  visibility: hidden;
  transition:
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.35s ease,
    visibility 0.35s ease;
}

.inquiry-popup.is-visible {
  transform: translateY(-50%) translateX(0);
  opacity: 1;
  visibility: visible;
}

.inquiry-popup__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.inquiry-popup__title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.inquiry-popup__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(79, 195, 232, 0.15);
  border: 1px solid var(--card-border);
  color: var(--cyan);
}

.inquiry-popup__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
}

.inquiry-popup__close {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--white);
  cursor: pointer;
  padding: 4px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.inquiry-popup__close:hover {
  opacity: 1;
}

.inquiry-popup__divider {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.inquiry-popup__divider-line {
  display: block;
  width: 80px;
  height: 1px;
  background: rgba(255, 255, 255, 0.4);
}

.inquiry-popup__droplet {
  color: var(--white);
  margin: 0 0.4rem;
  flex-shrink: 0;
}

.inquiry-popup__email {
  display: block;
  text-align: center;
  padding: 0.75rem 1rem;
  border: 1px solid var(--cyan);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.inquiry-popup__email:hover {
  background: rgba(79, 195, 232, 0.1);
  box-shadow: 0 0 12px var(--cyan-glow);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ========================================
   Responsive - Tablet & Mobile
   ======================================== */

@media (max-width: 768px) {
  .header {
    padding: 1rem 1.25rem;
  }

  .header__hamburger {
    display: flex;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 5rem 2rem 2rem;
    background: rgba(10, 31, 61, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transform: translateX(100%);
    transition: transform 0.35s ease;
    z-index: 105;
  }

  .header__nav.is-open {
    transform: translateX(0);
  }

  .header__link {
    display: block;
    width: 100%;
    padding: 1rem 0;
    font-size: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .header__separator {
    display: none;
  }

  .header__login {
    margin-left: 0;
    margin-top: 1.5rem;
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1.25rem;
  }

  .hero__divider-line {
    width: 60px;
  }

  .cards {
    margin-top: -80px;
    padding: 0 1.25rem 3rem;
  }

  .cards__inner {
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
  }

  .card {
    max-width: 100%;
    width: 100%;
    padding: 2rem 1.5rem;
  }

  /* Inquiry popup - bottom sheet on mobile */
  .inquiry-popup {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    border-radius: 16px 16px 0 0;
    transform: translateY(100%);
    padding: 1.5rem 1.25rem 2rem;
  }

  .inquiry-popup.is-visible {
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .header__logo img {
    height: 36px;
  }

  .hero__title {
    font-size: 2rem;
  }
}