/* ==========================================================================
   Front Page Specific Styles — design-system.md 準拠
   Version 2.0.0
   ========================================================================== */

/* ==========================================================================
   1. Hero Section — media-structure.md S2 準拠
   ========================================================================== */

.hero {
  position: relative;
  min-height: 400px;
  max-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0d1452 0%, #1a237e 50%, #283593 100%);
  overflow: hidden;
  padding: var(--space-16) 0;
}

@media (min-width: 768px) {
  .hero {
    min-height: 440px;
    max-height: 480px;
    padding: var(--space-20) 0;
  }
}

@media (min-width: 1024px) {
  .hero {
    min-height: 480px;
  }
}

.hero__particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 30% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 70%),
              radial-gradient(ellipse at 70% 30%, rgba(5, 150, 105, 0.1) 0%, transparent 60%);
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: var(--color-text-inverse);
  max-width: 680px;
  margin: 0 auto;
}

.hero__label {
  display: inline-block;
  padding: var(--space-2) var(--space-5);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: var(--text-3xl);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: var(--space-5);
  min-height: 2.5em;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--text-4xl);
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: var(--text-5xl);
  }
}

.hero__typing {
  display: inline;
}

.hero__typing::after {
  content: '|';
  animation: blink 1s infinite;
  color: var(--color-cta-light);
  font-weight: 300;
}

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

.hero__subtitle {
  font-size: var(--text-base);
  opacity: 0.85;
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .hero__subtitle {
    font-size: var(--text-lg);
  }
}

/* --- Hero Search Bar --- */
.hero__search {
  max-width: 560px;
  margin: 0 auto var(--space-8);
}

.hero__search-form {
  display: flex;
  align-items: center;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.hero__search-icon {
  margin-left: var(--space-4);
  color: var(--color-gray-400);
  flex-shrink: 0;
}

.hero__search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  background: transparent;
  font-family: var(--font-sans);
}

.hero__search-input::placeholder {
  color: var(--color-gray-400);
}

.hero__search-btn {
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: background var(--transition-fast);
  white-space: nowrap;
  font-family: var(--font-sans);
}

.hero__search-btn:hover {
  background: var(--color-accent-dark);
}

/* --- Trust Message --- */
.hero__trust-message {
  font-size: var(--text-sm);
  opacity: 0.6;
  letter-spacing: 0.05em;
}

/* --- Scroll Indicator --- */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  51% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__typing::after,
  .hero__scroll-line {
    animation: none;
  }
}