/* ============================================
   Aegis Works Recruit Site - Base Styles
   Design: Minimal, modern, Hubble-inspired
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Noto+Sans+JP:wght@300;400;500;600;700;900&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Brand Colors */
  --color-primary: #1a3a5c;
  --color-primary-light: #24506e;
  --color-primary-dark: #15304d;
  --color-primary-bg: #f0f4f8;
  --color-primary-subtle: #dce6f0;

  /* Accent */
  --color-accent: #06B6D4;
  --color-accent-light: #22D3EE;

  /* Neutrals */
  --color-black: #0F172A;
  --color-dark: #1E293B;
  --color-text: #334155;
  --color-text-light: #64748B;
  --color-text-muted: #94A3B8;
  --color-border: #E2E8F0;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F8FAFC;
  --color-bg-card: #F1F5F9;

  /* Typography */
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-jp: '游ゴシック体', 'YuGothic', '游ゴシック', 'Yu Gothic', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-body: var(--font-jp);

  /* Spacing */
  --section-padding: 120px;
  --container-max: 1100px;
  --container-narrow: 800px;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-smooth: cubic-bezier(0.4, 0.4, 0, 1);
  --transition-base: 0.3s var(--ease-out);
  --transition-slow: 0.6s var(--ease-smooth);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.9;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: bold;
  line-height: 1.4;
  color: var(--color-black);
  font-feature-settings: "palt";
}

.heading-en {
  font-family: var(--font-en);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.heading-label {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
  display: block;
}

.heading-section {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.heading-section-sub {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-light);
  max-width: 600px;
}

/* ── Layout ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
  z-index: 2;
}

.section--bg {
  background-color: var(--color-bg-soft);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-base);
}

.btn--primary {
  background: var(--color-black);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
}

.btn--outline {
  background: transparent;
  color: var(--color-black);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-black);
  transform: translateY(-2px);
}

.btn--primary-color {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary-color:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 58, 92, 0.25);
}

.btn__arrow {
  font-size: 1.1em;
  transition: transform 0.3s ease;
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ── Scroll Animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.fade-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.fade-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-smooth), transform 0.6s var(--ease-smooth);
}

.stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

.stagger.is-visible > *:nth-child(1) { transition-delay: 0s; }
.stagger.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger.is-visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger.is-visible > *:nth-child(4) { transition-delay: 0.3s; }
.stagger.is-visible > *:nth-child(5) { transition-delay: 0.4s; }
.stagger.is-visible > *:nth-child(6) { transition-delay: 0.5s; }
.stagger.is-visible > *:nth-child(7) { transition-delay: 0.6s; }
.stagger.is-visible > *:nth-child(8) { transition-delay: 0.7s; }
.stagger.is-visible > *:nth-child(9) { transition-delay: 0.8s; }
.stagger.is-visible > *:nth-child(10) { transition-delay: 0.9s; }

/* ── Wave Decoration ── */
.wave-divider {
  width: 100%;
  overflow: hidden;
  line-height: 0;
}

.wave-divider svg {
  width: 100%;
  height: 80px;
  display: block;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  :root {
    --section-padding: 80px;
  }

  body {
    font-size: 14px;
  }

  .container {
    padding: 0 20px;
  }

  .heading-section {
    font-size: 1.6rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.85rem;
  }
}