/* ============================================================
   Masterkey&Company — Front Page Styles
   ============================================================ */

/* ---- Variables ------------------------------------------- */
:root {
  --mk-bg:        #FAFAF8;
  --mk-white:     #FFFFFF;
  --mk-text:      #111111;
  --mk-sub:       #555555;
  --mk-border:    #E5E5E5;
  --mk-accent:    #1F2937;

  --mk-font-jp:   'Noto Sans JP', 'Hiragino Sans', 'ヒラギノ角ゴシック', sans-serif;
  --mk-font-en:   'Inter', system-ui, -apple-system, sans-serif;

  --mk-max:       1200px;
  --mk-py:        140px;
  --mk-r:         16px;
  --mk-r-lg:      24px;
  --mk-ease:      0.3s ease;
}

/* ---- Base ------------------------------------------------- */
#mk-front-page {
  background-color: var(--mk-bg);
  color: var(--mk-text);
  font-family: var(--mk-font-jp);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#mk-front-page *,
#mk-front-page *::before,
#mk-front-page *::after {
  box-sizing: border-box;
  font-family: var(--mk-font-jp);
}

/* ---- Container -------------------------------------------- */
.mk-container {
  max-width: var(--mk-max);
  margin: 0 auto;
  padding: 0 48px;
}

/* ---- Section ---------------------------------------------- */
.mk-section {
  padding: var(--mk-py) 0;
}

/* ---- Label (英字キャプション) ------------------------------ */
.mk-label {
  font-family: var(--mk-font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mk-sub);
  display: block;
  margin-bottom: 20px;
}

/* ---- Headings --------------------------------------------- */
.mk-heading {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--mk-text);
  margin: 0 0 24px;
}

/* ---- Body text -------------------------------------------- */
.mk-body {
  font-size: 16px;
  line-height: 2.0;
  color: var(--mk-sub);
  margin: 0;
}

/* ---- Buttons ---------------------------------------------- */
.mk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border-radius: 100px;
  font-family: var(--mk-font-jp);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--mk-ease), border-color var(--mk-ease),
              color var(--mk-ease), transform var(--mk-ease);
  cursor: pointer;
}

.mk-btn-primary {
  background-color: var(--mk-accent);
  color: #fff;
  border: 2px solid var(--mk-accent);
}
.mk-btn-primary:hover {
  background-color: #374151;
  border-color: #374151;
  color: #fff;
  transform: translateY(-2px);
}

.mk-btn-secondary {
  background-color: transparent;
  color: var(--mk-text);
  border: 2px solid var(--mk-border);
}
.mk-btn-secondary:hover {
  border-color: var(--mk-accent);
  color: var(--mk-accent);
  transform: translateY(-2px);
}

.mk-btn-white {
  background-color: #fff;
  color: var(--mk-accent);
  border: 2px solid #fff;
  font-size: 16px;
  padding: 18px 40px;
}
.mk-btn-white:hover {
  background-color: var(--mk-bg);
  border-color: var(--mk-bg);
  color: var(--mk-accent);
  transform: translateY(-2px);
}

/* ---- Divider ---------------------------------------------- */
.mk-divider {
  border: none;
  border-top: 1px solid var(--mk-border);
  margin: 0;
}

/* ============================================================
   01. HERO
   ============================================================ */

#mk-hero {
  padding: 100px 0 120px;
  background-color: var(--mk-bg);
}

.mk-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.mk-hero-content {
  max-width: 560px;
}

.mk-hero-tag {
  display: inline-flex;
  align-items: center;
  background-color: var(--mk-white);
  border: 1px solid var(--mk-border);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 500;
  color: var(--mk-sub);
  letter-spacing: 0.04em;
  margin-bottom: 32px;
}

.mk-hero-title {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--mk-text);
  margin: 0 0 28px;
}

.mk-hero-subtitle {
  font-size: 16px;
  line-height: 2.0;
  color: var(--mk-sub);
  margin: 0 0 48px;
}

.mk-hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.mk-hero-image-wrap {
  border-radius: var(--mk-r-lg);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background-color: var(--mk-border);
}

.mk-hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.mk-img-placeholder {
  width: 100%;
  height: 100%;
  background-color: #e8e8e5;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mk-font-en);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #aaa;
}

/* ============================================================
   02. PROBLEM
   ============================================================ */

#mk-problem {
  background-color: var(--mk-white);
}

.mk-problem-header {
  max-width: 600px;
  margin-bottom: 64px;
}

.mk-problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--mk-border);
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-r);
  overflow: hidden;
}

.mk-problem-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 28px 32px;
  background-color: var(--mk-white);
  transition: background-color var(--mk-ease);
}
.mk-problem-item:hover {
  background-color: var(--mk-bg);
}

.mk-problem-num {
  font-family: var(--mk-font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mk-border);
  padding-top: 3px;
  flex-shrink: 0;
}

.mk-problem-text {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--mk-text);
}

/* ============================================================
   03. VALUE
   ============================================================ */

#mk-value {
  background-color: var(--mk-bg);
}

.mk-value-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 72px;
}

.mk-value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.mk-value-card {
  background-color: var(--mk-white);
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-r);
  padding: 40px 32px;
}

.mk-value-num {
  display: block;
  font-family: var(--mk-font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--mk-border);
  margin-bottom: 16px;
}

.mk-value-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--mk-text);
  margin: 0 0 12px;
}

.mk-value-desc {
  font-size: 14px;
  line-height: 2.0;
  color: var(--mk-sub);
  margin: 0;
}

/* ============================================================
   04. SERVICE
   ============================================================ */

#mk-service {
  background-color: var(--mk-white);
}

.mk-service-header {
  margin-bottom: 56px;
}

.mk-service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.mk-service-card {
  background-color: var(--mk-bg);
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-r);
  padding: 36px 28px;
  transition: border-color var(--mk-ease), transform var(--mk-ease);
}
.mk-service-card:hover {
  border-color: var(--mk-accent);
  transform: translateY(-4px);
}

.mk-service-tag {
  display: inline-block;
  background-color: var(--mk-border);
  border-radius: 100px;
  padding: 3px 12px;
  font-family: var(--mk-font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mk-sub);
  margin-bottom: 16px;
}

.mk-service-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--mk-text);
  margin: 0 0 12px;
}

.mk-service-desc {
  font-size: 13px;
  line-height: 2.0;
  color: var(--mk-sub);
  margin: 0;
}

/* ============================================================
   05. PROFILE
   ============================================================ */

#mk-profile {
  background-color: var(--mk-bg);
}

.mk-profile-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}

.mk-profile-heading {
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--mk-text);
  margin: 0 0 28px;
}

.mk-profile-body {
  font-size: 15px;
  line-height: 2.0;
  color: var(--mk-sub);
  margin: 0 0 36px;
}

.mk-profile-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mk-profile-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mk-text);
}

.mk-profile-list li::before {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--mk-accent);
  flex-shrink: 0;
  margin-top: 8px;
}

.mk-profile-image-wrap {
  border-radius: var(--mk-r-lg);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background-color: var(--mk-border);
}

.mk-profile-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

/* ============================================================
   06. INSIGHT
   ============================================================ */

#mk-insight {
  background-color: var(--mk-white);
}

.mk-insight-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 56px;
}

.mk-insight-header-text {
  max-width: 520px;
}

.mk-insight-all {
  font-family: var(--mk-font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--mk-accent);
  text-decoration: none;
  white-space: nowrap;
  transition: opacity var(--mk-ease);
}
.mk-insight-all:hover {
  opacity: 0.7;
  color: var(--mk-accent);
}

.mk-insight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.mk-insight-card {
  background-color: var(--mk-bg);
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-r);
  overflow: hidden;
  text-decoration: none;
  color: var(--mk-text);
  display: block;
  transition: transform var(--mk-ease), border-color var(--mk-ease);
}
.mk-insight-card:hover {
  transform: translateY(-4px);
  border-color: var(--mk-accent);
  color: var(--mk-text);
}

.mk-insight-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--mk-border);
}

.mk-insight-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.mk-insight-card:hover .mk-insight-thumb img {
  transform: scale(1.03);
}

.mk-insight-thumb-ph {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mk-font-en);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: #aaa;
  background-color: #f0f0ec;
}

.mk-insight-body {
  padding: 24px 24px 28px;
}

.mk-insight-cat {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--mk-sub);
  border: 1px solid var(--mk-border);
  border-radius: 100px;
  padding: 3px 10px;
  margin-bottom: 10px;
}

.mk-insight-title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--mk-text);
  margin: 0 0 10px;
}

.mk-insight-date {
  font-family: var(--mk-font-en);
  font-size: 12px;
  color: var(--mk-sub);
}

.mk-insight-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 0;
  color: var(--mk-sub);
  font-size: 14px;
}

/* ============================================================
   07. FINAL CTA
   ============================================================ */

#mk-final-cta {
  background-color: var(--mk-accent);
  padding: var(--mk-py) 0;
}

.mk-cta-inner {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.mk-cta-label {
  color: rgba(255, 255, 255, 0.45);
}

.mk-cta-heading {
  font-size: clamp(26px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
  margin: 0 0 24px;
}

.mk-cta-body {
  font-size: 16px;
  line-height: 2.0;
  color: rgba(255, 255, 255, 0.65);
  margin: 0 0 48px;
}

/* ============================================================
   SMILEY CYCLER
   ============================================================ */

.mk-smiley-img {
  transition: opacity 0.35s ease;
}

.mk-smiley-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  padding: 10px 22px;
  background: var(--mk-white);
  border: 1px solid var(--mk-border);
  border-radius: 100px;
  font-family: var(--mk-font-jp);
  font-size: 13px;
  font-weight: 500;
  color: var(--mk-sub);
  cursor: pointer;
  transition: border-color var(--mk-ease), color var(--mk-ease), transform var(--mk-ease);
}

.mk-smiley-btn:hover {
  border-color: var(--mk-accent);
  color: var(--mk-accent);
  transform: translateY(-1px);
}

.mk-smiley-btn::before {
  content: '😊';
  font-size: 16px;
  transition: transform 0.4s ease;
}

.mk-smiley-btn:hover::before {
  transform: rotate(20deg) scale(1.2);
}

.mk-smiley-count {
  font-family: var(--mk-font-en);
  font-size: 11px;
  font-weight: 700;
  color: var(--mk-accent);
  min-width: 1em;
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */

.mk-fade {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.mk-delay-1 { transition-delay: 0.10s; }
.mk-delay-2 { transition-delay: 0.20s; }
.mk-delay-3 { transition-delay: 0.30s; }
.mk-delay-4 { transition-delay: 0.40s; }

/* ============================================================
   RESPONSIVE — TABLET (≤ 1024px)
   ============================================================ */

@media (max-width: 1024px) {
  .mk-container { padding: 0 32px; }
  .mk-hero-inner { gap: 48px; }
  .mk-service-grid { grid-template-columns: repeat(2, 1fr); }
  .mk-profile-inner { gap: 60px; }
}

/* ============================================================
   RESPONSIVE — MOBILE (≤ 768px)
   ============================================================ */

@media (max-width: 768px) {
  :root {
    --mk-py: 80px;
  }

  .mk-container { padding: 0 20px; }

  /* Hero */
  #mk-hero { padding: 64px 0 80px; }
  .mk-hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .mk-hero-image { order: -1; }
  .mk-hero-image-wrap { aspect-ratio: 4 / 3; }
  .mk-hero-content { max-width: 100%; }
  .mk-hero-actions { flex-direction: column; }
  .mk-btn { width: 100%; text-align: center; justify-content: center; }

  /* Problem */
  .mk-problem-grid { grid-template-columns: 1fr; }

  /* Value */
  .mk-value-grid { grid-template-columns: 1fr; gap: 16px; }

  /* Service */
  .mk-service-grid { grid-template-columns: 1fr; gap: 14px; }

  /* Profile */
  .mk-profile-inner { grid-template-columns: 1fr; gap: 40px; }
  .mk-profile-image { order: -1; }
  .mk-profile-image-wrap { aspect-ratio: 4 / 3; }

  /* Insight */
  .mk-insight-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
  .mk-insight-grid { grid-template-columns: 1fr; gap: 16px; }
}