/*
Theme Name: GO-IKU Corporate Site
Theme URI: https://go-iku.example.com
Author: GO-IKU Inc.
Author URI: https://go-iku.example.com
Description: Base stylesheet for GO-IKU corporate site.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 8.0
Text Domain: goiku
*/

@charset "UTF-8";
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;700&family=Noto+Sans+JP:wght@300;400;500;700&display=swap");

:root {
  --color-base: #f2f5fb;
  --color-main: #001a3a;
  --color-text: #0f1c31;
  --color-sub: #dfe8f5;
  --color-border: #c5d3e6;

  --font-ja: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-en: "Inter", "Segoe UI", sans-serif;
  --font-body: var(--font-en), var(--font-ja);

  --fs-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --fs-sm: clamp(0.875rem, 0.83rem + 0.22vw, 0.9375rem);
  --fs-md: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --fs-lg: clamp(1.25rem, 1.1rem + 0.75vw, 1.625rem);
  --fs-xl: clamp(1.8rem, 1.35rem + 2vw, 3.25rem);

  --lh-tight: 1.25;
  --lh-base: 1.8;
  --lh-loose: 2;
  --ls-tight: 0.05em;
  --ls-wide: 0.1em;

  --content-max: 1200px;
  --content-gutter: clamp(1.25rem, 2vw, 2rem);
  --section-y: clamp(4.5rem, 7vw, 8rem);
  --section-y-hero: clamp(7rem, 12vw, 12rem);

  --ease-out-expo: cubic-bezier(0.25, 1, 0.5, 1);
  --dur-fast: 220ms;
  --dur-base: 600ms;
  --dur-slow: 900ms;
}

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

* {
  margin: 0;
}

html,
body {
  min-height: 100%;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  background: var(--color-base);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-md);
  font-weight: 400;
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-base);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

input,
button,
textarea,
select {
  color: inherit;
  font: inherit;
}

button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

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

ul,
ol {
  list-style: none;
  padding: 0;
}

.l-page {
  display: flex;
  min-height: 100dvh;
  flex-direction: column;
}

.l-main {
  flex: 1;
}

.l-container {
  width: min(calc(100% - var(--content-gutter) * 2), var(--content-max));
  margin-inline: auto;
}

.l-section {
  padding-block: var(--section-y);
}

.l-section--hero {
  padding-block: var(--section-y-hero);
}

.u-bg-sub {
  background: var(--color-sub);
}

.u-eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-main);
}

.u-title {
  font-family: var(--font-ja);
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  line-height: var(--lh-tight);
}

.u-lead {
  max-width: 72ch;
  margin-top: 1.5rem;
  font-size: var(--fs-lg);
  font-weight: 300;
  line-height: var(--lh-loose);
}

.u-text-main {
  color: var(--color-main);
}

.c-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity var(--dur-fast) var(--ease-out-expo);
}

.c-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0.35);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out-expo);
}

.c-link:hover,
.c-link:focus-visible {
  opacity: 0.82;
}

.c-link:hover::after,
.c-link:focus-visible::after {
  transform: scaleX(1);
}

.c-link:focus-visible,
.c-button:focus-visible,
.site-header__menu-btn:focus-visible,
.form-field__control:focus-visible {
  outline: 2px solid var(--color-main);
  outline-offset: 3px;
}

.c-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.8rem 1.4rem;
  border: 1px solid var(--color-main);
  color: var(--color-main);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  transition:
    background-color var(--dur-fast) var(--ease-out-expo),
    color var(--dur-fast) var(--ease-out-expo),
    opacity var(--dur-fast) var(--ease-out-expo);
}

.c-button:hover {
  background: var(--color-main);
  color: var(--color-base);
}

.c-button--solid {
  background: var(--color-main);
  color: var(--color-base);
}

.c-button--solid:hover {
  opacity: 0.86;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--color-base) 90%, transparent);
  backdrop-filter: blur(10px);
  transition: border-color var(--dur-fast) var(--ease-out-expo);
}

.site-header.is-scrolled {
  border-color: var(--color-border);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 1.5rem;
  min-height: 5.2rem;
}

.site-header__brand {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
}

.site-header__brand-main {
  color: var(--color-main);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.site-header__brand-sub {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-text) 65%, var(--color-base));
}

.site-header__menu-btn {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--color-border);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.site-nav__link {
  position: relative;
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
  text-transform: none;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out-expo);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link.is-current::after {
  transform: scaleX(1);
}

.top-announcement {
  padding: clamp(1.35rem, 3.5vw, 2rem) 0;
  background: linear-gradient(
    125deg,
    color-mix(in srgb, var(--color-main) 16%, var(--color-base)) 0%,
    color-mix(in srgb, var(--color-main) 6%, var(--color-sub)) 100%
  );
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 6px 28px rgb(0 26 58 / 10%);
}

.top-announcement__inner {
  display: grid;
  gap: 1rem;
  align-items: start;
  border-left: 4px solid var(--color-main);
  padding-left: clamp(1rem, 2vw, 1.5rem);
}

@media (min-width: 768px) {
  .top-announcement__inner {
    grid-template-columns: auto 1fr;
    gap: clamp(1.25rem, 3vw, 2rem);
    align-items: center;
  }
}

.top-announcement__label {
  display: inline-block;
  margin: 0;
  padding: 0.4rem 0.85rem;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-base);
  background: var(--color-main);
  border-radius: 2px;
  white-space: nowrap;
}

.top-announcement__title {
  font-size: clamp(1.1rem, 1rem + 0.55vw, 1.55rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: var(--lh-tight);
  color: var(--color-main);
}

.top-announcement__text {
  margin-top: 0.6rem;
  margin-bottom: 0;
  max-width: 52ch;
  font-size: var(--fs-sm);
}

.top-announcement__cta {
  margin-top: 1.15rem;
}

.hero {
  position: relative;
  border-bottom: 1px solid var(--color-border);
  color: #eef3fb;
  background:
    radial-gradient(ellipse 120% 80% at 85% 20%, rgb(30 72 130 / 35%) 0%, transparent 55%),
    radial-gradient(ellipse 90% 70% at 10% 90%, rgb(12 48 98 / 45%) 0%, transparent 50%),
    linear-gradient(112deg, rgb(0 20 47 / 92%) 0%, rgb(0 28 64 / 78%) 46%, rgb(6 31 66 / 55%) 100%);
}

.hero .u-eyebrow {
  color: #c8d8f0;
}

.hero .u-title {
  color: #f6f9ff;
}

.hero .u-lead,
.hero__copy {
  color: #dbe6f6;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(2rem, 4vw, 5rem);
  align-items: end;
}

.hero__copy {
  max-width: 32ch;
  margin-top: 2.2rem;
  font-size: var(--fs-md);
}

.hero__panel {
  border: 1px solid rgb(197 211 230 / 45%);
  background: linear-gradient(145deg, rgb(10 35 72 / 55%), rgb(6 28 59 / 62%));
  backdrop-filter: blur(1.5px);
  padding: clamp(1.2rem, 2.5vw, 2rem);
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.hero__meta dt {
  margin-bottom: 0.3rem;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: #b5c8e5;
}

.hero__meta dd {
  font-weight: 500;
  color: #eff5ff;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: clamp(2rem, 3.4vw, 3rem);
}

.section-head__title {
  font-size: clamp(1.4rem, 1.15rem + 1.1vw, 2rem);
  letter-spacing: 0.08em;
  color: var(--color-main);
}

.section-head__text {
  max-width: 44ch;
  font-size: var(--fs-sm);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.8rem);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.8rem);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-base);
  padding: clamp(1.2rem, 2vw, 1.8rem);
}

.card__index {
  color: color-mix(in srgb, var(--color-main) 88%, var(--color-base));
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
}

.card__title {
  font-size: clamp(1.05rem, 0.95rem + 0.45vw, 1.3rem);
  letter-spacing: 0.07em;
  color: var(--color-main);
}

.card__text {
  font-size: var(--fs-sm);
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
}

.list {
  border-top: 1px solid var(--color-border);
}

.list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-sm);
}

.list__date {
  color: color-mix(in srgb, var(--color-text) 65%, var(--color-base));
}

.service-grid {
  display: grid;
  gap: 1.2rem;
}

.service-row {
  display: grid;
  grid-template-columns: minmax(7rem, 10rem) 1fr auto;
  gap: 1.3rem;
  align-items: center;
  border: 1px solid var(--color-border);
  background: var(--color-base);
  padding: 1.1rem 1.2rem;
}

.service-row__tag {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--color-main);
}

.service-row__title {
  font-size: var(--fs-md);
  font-weight: 500;
}

.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.process__step {
  border-top: 1px solid var(--color-main);
  padding-top: 1rem;
}

.process__number {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--color-main);
}

.profile {
  width: 100%;
  border-top: 1px solid var(--color-border);
}

.profile tr {
  border-bottom: 1px solid var(--color-border);
}

.profile th,
.profile td {
  padding: 1rem 0.5rem 1rem 0;
  font-size: var(--fs-sm);
  text-align: left;
  vertical-align: top;
}

.profile th {
  width: 11rem;
  color: color-mix(in srgb, var(--color-text) 65%, var(--color-base));
  font-weight: 500;
}

.profile td ol {
  margin: 0;
  padding-left: 1.5rem;
  list-style-type: decimal;
  list-style-position: outside;
}

.profile td li + li {
  margin-top: 0.4rem;
}

.service-block {
  margin-top: 1.5rem;
}

.service-block:first-of-type {
  margin-top: 0;
}

.service-block__title {
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--color-main);
  margin-bottom: 0.5rem;
}

.service-block__text {
  font-size: var(--fs-sm);
  margin: 0;
}

.service-detail-lead {
  max-width: 52ch;
  font-size: var(--fs-sm);
}

.service-cta {
  margin-top: 1.5rem;
}

.legal-table {
  width: 100%;
  border-top: 1px solid var(--color-border);
}

.legal-table tr {
  border-bottom: 1px solid var(--color-border);
}

.legal-table th,
.legal-table td {
  padding: 1rem 0.5rem 1rem 0;
  font-size: var(--fs-sm);
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  width: 11rem;
  color: color-mix(in srgb, var(--color-text) 65%, var(--color-base));
  font-weight: 500;
}

.legal-note {
  margin-top: 2rem;
  max-width: 44ch;
  font-size: var(--fs-sm);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.contact-card {
  border: 1px solid var(--color-border);
  padding: clamp(1.2rem, 2vw, 1.8rem);
}

.form {
  display: grid;
  gap: 1rem;
}

.form-field {
  display: grid;
  gap: 0.4rem;
}

.form-field__label {
  font-size: var(--fs-sm);
  font-weight: 500;
}

.form-field__control {
  width: 100%;
  border: 1px solid var(--color-border);
  padding: 0.75rem 0.9rem;
  background: var(--color-base);
}

textarea.form-field__control {
  min-height: 10rem;
  resize: vertical;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: var(--fs-xs);
}

[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 20px, 0);
  transition:
    opacity var(--dur-base) var(--ease-out-expo),
    transform var(--dur-base) var(--ease-out-expo);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

[data-reveal="delayed"] {
  transition-delay: 120ms;
}

[data-reveal="deep"] {
  transform: translate3d(0, 32px, 0);
  transition-duration: var(--dur-slow);
}

@media (max-width: 1024px) {
  .hero__grid,
  .split,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-4,
  .process {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .service-row {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }
}

@media (max-width: 760px) {
  .site-header__inner {
    grid-template-columns: 1fr auto;
  }

  .site-header__menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-main);
    letter-spacing: 0.06em;
    text-transform: none;
    font-size: var(--fs-xs);
  }

  .site-nav {
    display: none;
    grid-column: 1 / -1;
    padding-bottom: 1rem;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid-3,
  .grid-4,
  .process {
    grid-template-columns: 1fr;
  }

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

  .profile th,
  .profile td {
    display: block;
    width: 100%;
    padding-right: 0;
  }

  .profile th {
    padding-bottom: 0.2rem;
    border-bottom: 0;
  }

  .legal-table th,
  .legal-table td {
    display: block;
    width: 100%;
    padding-right: 0;
  }

  .legal-table th {
    padding-bottom: 0.2rem;
    border-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

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

.notice-board {
  border: 1px solid var(--color-border);
  background: var(--color-base);
  padding: clamp(1.1rem, 1.8vw, 1.6rem);
}

.notice-board__title {
  color: var(--color-main);
  font-size: var(--fs-md);
  font-weight: 500;
}

.notice-board__text {
  margin-top: 0.55rem;
  font-size: var(--fs-sm);
  color: color-mix(in srgb, var(--color-text) 78%, var(--color-base));
}

.notice-board .c-link {
  margin-top: 0.9rem;
}

@media (max-width: 760px) {
  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer__links {
    gap: 0.85rem;
  }
}