/* ==========================================================================
   Solution Partners ― 取り扱い製品ページ
   style.css
   ========================================================================== */

/* ---------- 1. Design Tokens ---------- */
:root {
  /* Colors ― Enterprise Navy Palette */
  --c-navy-900: #071021;
  --c-navy-800: #0a1930;
  --c-navy-700: #102544;
  --c-navy-600: #16325c;
  --c-blue-600: #0d6efd;
  --c-blue-500: #2b7fe0;
  --c-blue-400: #5b9df9;

  --c-ink: #101828;
  --c-body: #475569;
  --c-muted: #7c8aa0;
  --c-border: #e4e9f2;
  --c-border-strong: #cbd5e5;
  --c-surface: #ffffff;
  --c-surface-alt: #f6f8fc;
  --c-surface-sunken: #eef2f8;

  /* Category accents */
  --accent-ai: #3d6cf0;
  --accent-ai-soft: #eef1fe;
  --accent-security: #0fae96;
  --accent-security-soft: #e9faf6;
  --accent-network: #e08a1e;
  --accent-network-soft: #fdf3e5;

  /* Radius */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-pill: 999px;

  /* Shadow */
  --shadow-xs: 0 1px 2px rgba(10, 25, 48, 0.06);
  --shadow-sm: 0 4px 14px rgba(10, 25, 48, 0.08);
  --shadow-md: 0 16px 36px -12px rgba(10, 25, 48, 0.22);
  --shadow-lg: 0 28px 64px -16px rgba(10, 25, 48, 0.32);
  --shadow-glow: 0 0 0 1px rgba(43, 127, 224, 0.16), 0 12px 28px -8px rgba(13, 110, 253, 0.35);

  /* Spacing scale */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 2.75rem;
  --sp-8: 3.5rem;
  --sp-9: 5rem;
  --sp-10: 7rem;

  /* Type */
  --font-sans: "Segoe UI", "Yu Gothic UI", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.28s var(--ease);
  --transition-slow: 0.5s var(--ease);

  --container-w: 1200px;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--c-ink);
  background: var(--c-surface);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

button,
input {
  font: inherit;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* ---------- 3. Accessibility helpers ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  z-index: 1000;
  background: var(--c-navy-800);
  color: #fff;
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-sm);
  transition: top var(--transition);
}

.skip-link:focus {
  top: var(--sp-4);
}

:focus-visible {
  outline: 3px solid var(--c-blue-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 4. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

/* ---------- 5. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: var(--sp-3);
  flex-wrap: wrap;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--c-navy-800);
}

.logo__mark {
  width: 32px;
  height: 32px;
  color: var(--c-blue-600);
  flex-shrink: 0;
}

.logo__text strong {
  color: var(--c-blue-600);
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.85rem;
  color: var(--c-muted);
  flex-wrap: wrap;
}

.breadcrumb li:not(:last-child)::after {
  content: "›";
  margin-left: var(--sp-2);
  color: var(--c-border-strong);
}

.breadcrumb a {
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--c-blue-600);
}

.breadcrumb li[aria-current="page"] {
  color: var(--c-ink);
  font-weight: 600;
}

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--sp-10) var(--sp-9);
  text-align: center;
  isolation: isolate;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(60% 80% at 50% -10%, #eaf1ff 0%, rgba(234, 241, 255, 0) 60%),
    radial-gradient(45% 60% at 90% 10%, rgba(15, 174, 150, 0.12) 0%, rgba(15, 174, 150, 0) 60%),
    linear-gradient(180deg, var(--c-surface) 0%, var(--c-surface-alt) 100%);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-blue-600);
  margin-bottom: var(--sp-3);
}

.hero__title {
  font-size: clamp(2.1rem, 4.5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--c-navy-800);
  margin-bottom: var(--sp-5);
}

.hero__lead {
  max-width: 760px;
  margin-inline: auto;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--c-body);
  line-height: 1.9;
}

/* ---------- 7. Products grid ---------- */
.products {
  padding-block: var(--sp-8) var(--sp-9);
  background: var(--c-surface-alt);
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.75rem);
}

/* ---------- 8. Product card ---------- */
.product-card {
  --accent: var(--accent-ai);
  --accent-soft: var(--accent-ai-soft);
  display: flex;
  flex-direction: column;
  background: var(--c-surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow),
    border-color var(--transition-slow);
}

.product-card:hover,
.product-card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.product-card--security {
  --accent: var(--accent-security);
  --accent-soft: var(--accent-security-soft);
}

.product-card--network {
  --accent: var(--accent-network);
  --accent-soft: var(--accent-network-soft);
}

.product-card__header {
  position: relative;
  padding: var(--sp-6) var(--sp-6) var(--sp-5);
  background: linear-gradient(135deg, var(--c-navy-800) 0%, var(--c-navy-600) 100%);
  overflow: hidden;
}

.product-card__header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 140% at 100% 0%, rgba(255, 255, 255, 0.12), transparent 55%);
  pointer-events: none;
}

.product-card__header::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent);
}

.product-card__heading {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3);
}

.product-card__title {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.01em;
}

.product-card__title-sub {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
}

.product-card__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4em 0.95em;
  border-radius: var(--r-pill);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #fff;
  background: color-mix(in srgb, var(--accent) 55%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 70%, white 10%);
  backdrop-filter: blur(6px);
}

.product-card__body {
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  flex: 1;
}

.product-card__provider {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.9rem;
  color: var(--c-muted);
}

.product-card__provider .icon--inline {
  width: 16px;
  height: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

.product-card__provider-label {
  font-weight: 700;
  color: var(--c-ink);
  padding-right: var(--sp-1);
}

.product-card__description {
  color: var(--c-body);
  font-size: 0.98rem;
  line-height: 1.85;
}

.product-card__section {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.product-card__section-title {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-navy-800);
}

.product-card__section-title .icon {
  width: 18px;
  height: 18px;
  color: var(--accent);
}

.product-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.product-card__feature {
  display: flex;
  flex-direction: column;
  gap: 0.3em;
  padding: var(--sp-4) var(--sp-5);
  background: var(--c-surface-sunken);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  transition: background var(--transition), transform var(--transition);
}

.product-card__feature:hover {
  background: var(--accent-soft);
  transform: translateX(4px);
}

.product-card__feature-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--c-ink);
}

.product-card__feature-desc {
  font-size: 0.88rem;
  color: var(--c-body);
  line-height: 1.7;
}

.product-card__scenarios {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.product-card__scenarios li {
  position: relative;
  padding-left: 1.4em;
  font-size: 0.92rem;
  color: var(--c-body);
}

.product-card__scenarios li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.product-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: auto;
  padding-top: var(--sp-4);
}

/* ---------- 9. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.85em 1.5em;
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: 0.92rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition), color var(--transition), border-color var(--transition);
  flex: 1 1 auto;
  white-space: nowrap;
}

.btn .icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.btn:hover .icon {
  transform: translateX(3px);
}

.btn--outline {
  background: transparent;
  border-color: var(--c-border-strong);
  color: var(--c-navy-800);
}

.btn--outline:hover {
  border-color: var(--c-navy-800);
  background: var(--c-surface-sunken);
  transform: translateY(-2px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--c-blue-600), var(--c-navy-700));
  color: #fff;
  box-shadow: var(--shadow-xs);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--light {
  background: #fff;
  color: var(--c-navy-800);
}

.btn--light:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ---------- 10. CTA band ---------- */
.cta-band {
  padding-block: var(--sp-8);
  background: linear-gradient(120deg, var(--c-navy-900), var(--c-navy-700) 60%, var(--c-blue-600));
}

.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
}

.cta-band__title {
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--sp-2);
}

.cta-band__lead {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
  max-width: 640px;
}

.cta-band .btn--light {
  flex: 0 0 auto;
}

/* ---------- 11. Footer ---------- */
.site-footer {
  padding-block: var(--sp-6);
  border-top: 1px solid var(--c-border);
  background: var(--c-surface);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.footer__note {
  font-size: 0.8rem;
  color: var(--c-muted);
  line-height: 1.8;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--c-muted);
}

/* ---------- 12. Fade-in animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  animation: fadeInUp 0.8s var(--ease) forwards;
  animation-delay: var(--d, 0s);
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .product-card,
  .btn,
  .product-card__feature {
    transition: none !important;
  }

  .product-card:hover {
    transform: none;
  }
}

/* ---------- 13. Responsive breakpoints ---------- */

/* Tablet */
@media (max-width: 1024px) {
  .products__grid {
    grid-template-columns: 1fr;
    max-width: 720px;
    margin-inline: auto;
  }
}

/* Small tablet / large phone */
@media (max-width: 640px) {
  .hero {
    padding-block: var(--sp-8) var(--sp-7);
  }

  .header__inner {
    justify-content: center;
    text-align: center;
  }

  .product-card__header {
    padding: var(--sp-5) var(--sp-5) var(--sp-4);
  }

  .product-card__body {
    padding: var(--sp-5);
    gap: var(--sp-4);
  }

  .product-card__heading {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  .product-card__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .cta-band__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-band .btn--light {
    width: 100%;
  }
}

/* Small phone */
@media (max-width: 380px) {
  .product-card__title {
    font-size: 1.2rem;
  }

  .hero__title {
    font-size: 1.8rem;
  }
}

/* Large desktop refinement */
@media (min-width: 1400px) {
  :root {
    --container-w: 1320px;
  }
}