/* TMSystems Portal — design tokens & layout */

/* デフォルト: ダーク */
:root,
html[data-theme="dark"] {
  --ink: #e8eef4;
  --ink-soft: #9eb0bd;
  --paper: #0c141c;
  --paper-2: #121c28;
  --ocean: #7ec8e3;
  --ocean-mid: #5eb0d0;
  --ocean-soft: rgba(126, 200, 227, 0.14);
  --amber: #e6a23c;
  --amber-soft: rgba(230, 162, 60, 0.16);
  --line: rgba(232, 238, 244, 0.12);
  --line-strong: rgba(232, 238, 244, 0.22);
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.35);
  --body-bg:
    radial-gradient(1200px 600px at 10% -10%, rgba(230, 162, 60, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(94, 176, 208, 0.12), transparent 50%),
    linear-gradient(180deg, #0a121a 0%, var(--paper) 40%, #0e1822 100%);
  --card-bg: rgba(18, 28, 40, 0.78);
  --surface-tint: rgba(126, 200, 227, 0.06);
  --footer-bg: rgba(0, 0, 0, 0.28);
  --coming-bg: linear-gradient(135deg, rgba(126, 200, 227, 0.1), rgba(230, 162, 60, 0.12));
  --placeholder-bg: rgba(230, 162, 60, 0.1);
  --btn-fill: #1a6f8f;
  --btn-fill-hover: #2289b0;
  --btn-fill-fg: #f4f7fa;
  --radius: 14px;
  --max: 1080px;
  --font-display: "Sora", "IBM Plex Sans JP", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --font-body: "IBM Plex Sans JP", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: dark;
}

html[data-theme="light"] {
  --ink: #0f1c28;
  --ink-soft: #3a4d5c;
  --paper: #f3f6f9;
  --paper-2: #e8eef3;
  --ocean: #0b3d5c;
  --ocean-mid: #145a7a;
  --ocean-soft: #d6e7f0;
  --amber: #e6a23c;
  --amber-soft: #f7e6c4;
  --line: rgba(15, 28, 40, 0.12);
  --line-strong: rgba(15, 28, 40, 0.22);
  --shadow-soft: 0 18px 40px rgba(11, 61, 92, 0.08);
  --body-bg:
    radial-gradient(1200px 600px at 10% -10%, rgba(230, 162, 60, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(20, 90, 122, 0.1), transparent 50%),
    linear-gradient(180deg, #eef3f7 0%, var(--paper) 35%, #f7f9fb 100%);
  --card-bg: rgba(255, 255, 255, 0.72);
  --surface-tint: rgba(11, 61, 92, 0.04);
  --footer-bg: rgba(11, 61, 92, 0.04);
  --coming-bg: linear-gradient(135deg, rgba(11, 61, 92, 0.08), rgba(230, 162, 60, 0.1));
  --placeholder-bg: rgba(230, 162, 60, 0.08);
  --btn-fill: #0b3d5c;
  --btn-fill-hover: #145a7a;
  --btn-fill-fg: #f4f7fa;
  color-scheme: light;
}

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

html {
  scroll-behavior: auto;
}

html.is-smooth-scrolling {
  pointer-events: none;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s var(--ease), color 0.35s var(--ease);
}

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

a {
  color: var(--ocean-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--ocean);
}

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--ocean);
  color: #fff;
  border-radius: 8px;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 1rem;
}

/* —— Site header —— */
.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  padding: 1.25rem 1.5rem;
}

.site-header--page {
  position: relative;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}

.site-header--page .brand-lockup {
  color: var(--ocean);
}

.site-header--page .brand-lockup:hover {
  color: var(--ink);
}

.site-header--page .site-nav a {
  color: var(--ink-soft);
}

.site-header--page .site-nav a:hover,
.site-header--page .site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-header--page .tm-theme-toggle {
  color: var(--ink-soft);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: #f4f7fa;
  text-decoration: none;
}

.brand-lockup:hover {
  color: #fff;
}

.brand-lockup__mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand-lockup__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}

.site-nav a {
  color: rgba(244, 247, 250, 0.88);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -0.2em;
  height: 2px;
  background: var(--amber);
  transition: right 0.35s var(--ease);
}

.site-nav a:hover {
  color: #fff;
}

.site-nav a:hover::after {
  right: 0;
}

/* —— Theme switch（TST タブカラー設定画面と同型） —— */
.tm-theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  user-select: none;
  color: rgba(244, 247, 250, 0.92);
}

.tm-theme-toggle .tm-theme-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.tm-theme-switch {
  position: relative;
  width: 40px;
  height: 20px;
  flex-shrink: 0;
}

.tm-theme-switch input[type="checkbox"] {
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  position: absolute;
  inset: 0;
  cursor: pointer;
  z-index: 2;
}

.tm-theme-switch .tm-theme-slider {
  position: absolute;
  inset: 0;
  background: #aaa;
  border-radius: 999px;
  transition: background 0.15s ease-in-out;
}

.tm-theme-switch .tm-theme-slider::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.15s ease-in-out;
}

.tm-theme-switch input[type="checkbox"]:checked ~ .tm-theme-slider {
  background: #4a90e2;
}

.tm-theme-switch input[type="checkbox"]:checked ~ .tm-theme-slider::before {
  transform: translateX(20px);
}

.tm-theme-switch input[type="checkbox"]:focus-visible ~ .tm-theme-slider {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: min(100vh, 820px);
  display: grid;
  align-items: end;
  color: #f4f7fa;
  overflow: hidden;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  transform: scale(1.04);
  animation: hero-drift 18s var(--ease) infinite alternate;
}

.hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 24, 38, 0.55) 0%, rgba(8, 24, 38, 0.35) 40%, rgba(8, 24, 38, 0.78) 100%),
    linear-gradient(90deg, rgba(11, 61, 92, 0.45) 0%, transparent 55%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: 7.5rem 1.5rem 4.5rem;
}

.hero__brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.5rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.15s forwards;
}

.hero__brand-mark {
  width: 72px;
  height: 72px;
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.35));
}

.hero__brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  text-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.hero__lead {
  margin: 0 0 0.75rem;
  max-width: 28em;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 500;
  line-height: 1.55;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.35s forwards;
}

.hero__sub {
  margin: 0 0 2rem;
  max-width: 34em;
  color: rgba(244, 247, 250, 0.82);
  font-size: 1rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.5s forwards;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.65s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 48px;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--amber);
  color: #1a1205;
}

.btn--primary:hover {
  background: #f0b24f;
  color: #1a1205;
}

.btn--ghost {
  background: rgba(244, 247, 250, 0.08);
  border-color: rgba(244, 247, 250, 0.35);
  color: #f4f7fa;
  backdrop-filter: blur(6px);
}

.btn--ghost:hover {
  background: rgba(244, 247, 250, 0.16);
  color: #fff;
}

.btn--secondary {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ocean);
}

.btn--secondary:hover {
  background: var(--ocean-soft);
  color: var(--ocean);
}

.btn--small {
  min-height: 40px;
  padding: 0.45rem 1rem;
  font-size: 0.88rem;
}

/* —— Sections —— */
.section {
  padding: 5rem 1.5rem;
}

.section__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section__head {
  margin-bottom: 2.25rem;
  max-width: 40rem;
}

.section__eyebrow {
  display: inline-block;
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ocean-mid);
}

.section__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.25;
  color: var(--ocean);
}

.section__desc {
  margin: 0;
  color: var(--ink-soft);
}

.section--about {
  background: transparent;
}

.about-copy {
  max-width: 42rem;
  color: var(--ink-soft);
}

.about-copy p {
  margin: 0 0 1rem;
}

.about-copy p:last-child {
  margin-bottom: 0;
}

.placeholder-note {
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--amber);
  background: var(--placeholder-bg);
  color: var(--ink-soft);
  font-size: 0.9rem;
}

/* —— News —— */
.section--news {
  background: linear-gradient(180deg, var(--surface-tint), transparent);
}

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.news-item {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.news-item__date {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ocean-mid);
  letter-spacing: 0.02em;
}

.news-item__title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

.news-item__body {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* —— Apps —— */
.section--apps {
  padding-bottom: 4rem;
}

.app-group {
  margin-bottom: 3rem;
}

.app-group:last-of-type {
  margin-bottom: 2rem;
}

.app-group__title {
  margin: 0 0 1.25rem;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ocean);
}

.app-group__title span {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--ink-soft);
}

.app-list {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .app-list {
    grid-template-columns: 1fr 1fr;
  }
}

.app-item {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.35rem 1.4rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.35s var(--ease);
}

.app-item:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.app-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

.app-item__platform {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.55rem;
  border-radius: 6px;
  background: var(--ocean-soft);
  color: var(--ocean);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.app-item__version {
  font-family: var(--font-display);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.app-item__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.3;
}

.app-item__desc {
  margin: 0;
  flex: 1;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.app-item__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.25rem;
}

.app-item .btn--primary {
  background: var(--btn-fill);
  color: var(--btn-fill-fg);
}

.app-item .btn--primary:hover {
  background: var(--btn-fill-hover);
  color: var(--btn-fill-fg);
}

.app-item .btn--secondary {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ocean);
}

.app-item .btn--secondary:hover {
  background: var(--ocean-soft);
  color: var(--ocean);
}

.apps-coming {
  margin: 0;
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius);
  background: var(--coming-bg);
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

.apps-coming strong {
  color: var(--ocean);
  font-weight: 700;
}

/* —— Reveal on scroll —— */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* —— Anchor arrival flash —— */
.is-anchor-flash {
  animation: anchor-flash 1s var(--ease);
}

@keyframes anchor-flash {
  0% {
    box-shadow: 0 0 0 0 rgba(230, 162, 60, 0);
    transform: translateY(10px);
    opacity: 0.72;
  }
  35% {
    box-shadow: 0 0 0 6px rgba(230, 162, 60, 0.22);
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    box-shadow: 0 0 0 0 rgba(230, 162, 60, 0);
    transform: translateY(0);
    opacity: 1;
  }
}

.section__inner.is-anchor-flash,
.hero__content.is-anchor-flash {
  border-radius: var(--radius);
}

/* —— Back to top —— */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.55rem 1rem 0.55rem 0.85rem;
  border: 1px solid rgba(244, 247, 250, 0.18);
  border-radius: 999px;
  background: rgba(11, 61, 92, 0.92);
  color: #f4f7fa;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(8, 24, 38, 0.28);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), background 0.25s var(--ease);
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--ocean-mid);
}

.back-to-top__arrow {
  width: 0.55rem;
  height: 0.55rem;
  border-left: 2px solid currentColor;
  border-top: 2px solid currentColor;
  transform: rotate(45deg) translateY(2px);
}

/* —— Footer —— */
.site-footer {
  padding: 2.5rem 1.5rem 3rem;
  border-top: 1px solid var(--line);
  background: var(--footer-bg);
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ocean);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
}

.site-footer__brand img {
  width: 28px;
  height: 28px;
}

.site-footer__copy {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

/* —— Subpage hero / Contact —— */
.page-hero {
  padding: 3.5rem 1.5rem 1.5rem;
}

.page-hero__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.page-hero__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--ocean);
}

.page-hero__desc {
  margin: 0;
  max-width: 36rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section--contact {
  padding-top: 1.5rem;
}

.contact-card {
  max-width: 40rem;
  padding: 1.75rem 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card-bg);
}

.contact-card__label {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ocean-mid);
}

.contact-card__mail {
  display: inline-block;
  margin: 0 0 1.15rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  word-break: break-all;
}

.contact-card__mail:hover {
  color: var(--ocean);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.contact-card__note {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.75;
}

.contact-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact-card__actions .btn--primary {
  background: var(--btn-fill);
  color: var(--btn-fill-fg);
  text-decoration: none;
}

.contact-card__actions .btn--primary:hover {
  background: var(--btn-fill-hover);
  color: var(--btn-fill-fg);
}

.contact-card__actions .btn--secondary {
  text-decoration: none;
}

/* —— Animations —— */
@keyframes rise-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-drift {
  from {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.08) translate3d(-1.2%, -0.8%, 0);
  }
}

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

  .hero__media img,
  .hero__brand,
  .hero__lead,
  .hero__sub,
  .hero__actions,
  .reveal,
  .is-anchor-flash,
  .back-to-top {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }

  .back-to-top:not(.is-visible) {
    opacity: 0;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 1rem;
  }

  .site-nav {
    display: none;
  }

  .tm-theme-toggle {
    font-size: 12px;
    gap: 6px;
  }

  .hero__content {
    padding: 6.5rem 1.15rem 3.25rem;
  }

  .hero__brand-mark {
    width: 56px;
    height: 56px;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .section {
    padding: 3.5rem 1.15rem;
  }

  .page-hero {
    padding: 2.5rem 1.15rem 1rem;
  }

  .contact-card {
    padding: 1.35rem 1.15rem;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
  }
}