/* ============================================================
   kosen-cta.css — 高専LP 採用CTA（ダーク navy-deep）
   「高専の先輩と、まず話してみませんか。」カジュアル面談申込
   careers-cta と同構造・kosen固有スコープで実装
   ============================================================ */

/* --- Section --- */
.kosen-cta {
  position: relative;
  z-index: var(--z-content, 10);
  padding: 120px 0 100px;
  background: var(--c-navy-deep, #0D1B2E);
  overflow: hidden;
  text-align: center;
}

/* --- Background Decoration --- */
.kosen-cta__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.kosen-cta__flare {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
}

.kosen-cta__flare--orange {
  top: -200px;
  left: -200px;
  background: radial-gradient(circle, var(--c-orange, #E8672A) 0%, transparent 70%);
}

.kosen-cta__flare--gold {
  bottom: -200px;
  right: -200px;
  background: radial-gradient(circle, var(--c-gold) 0%, transparent 70%);
}

/* --- Container --- */
.kosen-cta__container {
  position: relative;
  z-index: 1;
  max-width: var(--s-container, 1200px);
  margin: 0 auto;
  padding: 0 var(--s-gutter, 32px);
}

/* --- Eyebrow --- */
.kosen-cta__eyebrow {
  display: inline-block;
  font-family: var(--f-label, 'Inter', sans-serif);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 20px;
  padding: 6px 16px;
  border: 1px solid rgba(201, 168, 76, 0.4);
  border-radius: 100px;
}

/* --- Title --- */
.kosen-cta__title {
  font-family: var(--f-heading-ja, 'Noto Serif JP', serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: #FFFFFF;
  margin: 0 0 28px;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.kosen-cta__em {
  font-style: normal;
  color: var(--c-gold);
}

.kosen-cta__br {
  display: none;
}

/* --- Body --- */
.kosen-cta__body {
  font-family: var(--f-body, 'Noto Sans JP', sans-serif);
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: rgba(255, 255, 255, 0.75);
  line-height: 2;
  margin: 0 0 52px;
}

/* --- Actions --- */
.kosen-cta__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

/* --- Buttons --- */
.kosen-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-body, 'Noto Sans JP', sans-serif);
  font-weight: 700;
  text-decoration: none;
  border-radius: 100px;
  transition: all var(--t-base, 0.4s) var(--ease-smooth);
  cursor: pointer;
  white-space: nowrap;
}

/* Primary Button */
.kosen-cta__btn--primary {
  padding: 18px 44px;
  font-size: 1rem;
  color: #FFFFFF;
  background: linear-gradient(170deg, var(--c-orange, #E8672A) 0%, var(--c-orange-light, #F0834E) 100%);
  box-shadow: 0 8px 32px rgba(232, 103, 42, 0.4);
  border: none;
}

.kosen-cta__btn--primary:hover {
  background: linear-gradient(170deg, var(--c-orange-deep, #D4551A) 0%, var(--c-orange, #E8672A) 100%);
  box-shadow: 0 12px 40px rgba(232, 103, 42, 0.55);
  transform: translateY(-2px);
}

.kosen-cta__btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 16px rgba(232, 103, 42, 0.35);
}

.kosen-cta__btn-icon {
  font-size: 0.85rem;
  transition: transform var(--t-base, 0.4s) var(--ease-out);
}

.kosen-cta__btn--primary:hover .kosen-cta__btn-icon {
  transform: translateX(4px);
}

/* Ghost Button */
.kosen-cta__btn--ghost {
  padding: 16px 32px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.kosen-cta__btn--ghost:hover {
  color: #FFFFFF;
  border-color: rgba(201, 168, 76, 0.6);
  background: rgba(201, 168, 76, 0.08);
  transform: translateY(-2px);
}

.kosen-cta__btn-icon-sm {
  font-size: 0.75rem;
  transition: transform var(--t-base, 0.4s) var(--ease-out);
}

.kosen-cta__btn--ghost:hover .kosen-cta__btn-icon-sm {
  transform: translateX(3px);
}

/* --- Note --- */
.kosen-cta__note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--f-body, 'Noto Sans JP', sans-serif);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  margin: 0;
  letter-spacing: 0.02em;
}

.kosen-cta__note .fa-shield-alt {
  color: rgba(201, 168, 76, 0.6);
  font-size: 0.75rem;
}

/* --- Reveal Animation (delay only — .rv 基本定義は base.css に集約済み) --- */
.kosen-cta .d1 { transition-delay: 0.10s; }
.kosen-cta .d2 { transition-delay: 0.20s; }
.kosen-cta .d3 { transition-delay: 0.30s; }
.kosen-cta .d4 { transition-delay: 0.40s; }

/* ============================================================
   Responsive
   ============================================================ */

/* --- Tablet (768px) --- */
@media (max-width: 768px) {
  .kosen-cta {
    padding: 88px 0 72px;
  }

  .kosen-cta__br {
    display: block;
  }

  .kosen-cta__title {
    font-size: clamp(1.7rem, 5vw, 2.4rem);
    margin-bottom: 24px;
  }

  .kosen-cta__body {
    margin-bottom: 40px;
    font-size: 0.95rem;
  }

  .kosen-cta__actions {
    flex-direction: column;
    align-items: center;
    gap: 14px;
  }

  .kosen-cta__btn--primary {
    padding: 16px 36px;
    font-size: 0.95rem;
    width: 100%;
    max-width: 340px;
    justify-content: center;
  }

  .kosen-cta__btn--ghost {
    padding: 14px 28px;
    font-size: 0.9rem;
    width: 100%;
    max-width: 340px;
    justify-content: center;
  }
}

/* --- Mobile (480px) --- */
@media (max-width: 480px) {
  .kosen-cta {
    padding: 72px 0 56px;
  }

  .kosen-cta__container {
    padding: 0 20px;
  }

  .kosen-cta__title {
    font-size: 1.65rem;
    margin-bottom: 20px;
  }

  .kosen-cta__body {
    font-size: 0.9rem;
    line-height: 1.9;
    margin-bottom: 36px;
  }

  .kosen-cta__flare {
    width: 400px;
    height: 400px;
  }

  .kosen-cta__btn--primary {
    padding: 15px 28px;
    font-size: 0.9rem;
  }

  .kosen-cta__btn--ghost {
    padding: 13px 24px;
    font-size: 0.85rem;
  }

  .kosen-cta__note {
    font-size: 0.75rem;
  }
}