/* ========================================
   LINERA Landing Page Styles
   ======================================== */

/* CSS Variables */
:root {
  --linera-primary: #5a6a5c;
  --linera-primary-dark: #3d4a3f;
  --linera-accent: #8b9a6b;
  --linera-text: #333333;
  --linera-text-light: #666666;
  --linera-bg: #ffffff;
  --linera-bg-gray: #f7f8f6;
  --linera-bg-warm: #faf9f7;
  --linera-border: #e5e5e5;
  --linera-gold: #b8a06a;
}

/* Base Styles */
.linera-page {
  font-family: "游ゴシック体", YuGothic, "游ゴシック", "Yu Gothic", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "メイリオ", Meiryo, sans-serif;
  color: var(--linera-text);
  line-height: 1.8;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}

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

.linera-page img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

.linera-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 60px);
}

/* Utility Classes */
.sp-only {
  display: none;
}

@media (max-width: 768px) {
  .sp-only {
    display: inline;
  }
}

/* ========================================
   Section: First View
   ======================================== */
.linera-fv {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 1000px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.linera-fv__bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.linera-fv__bg::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.7) 40%,
    rgba(255, 255, 255, 0.2) 70%,
    transparent 100%
  );
}

.linera-fv__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
}

.linera-fv__content {
  position: relative;
  z-index: 2;
  padding: 0 clamp(30px, 8vw, 120px);
  max-width: 700px;
}

.linera-fv__logo {
  margin-bottom: clamp(20px, 3vw, 40px);
}

.linera-fv__logo img {
  width: clamp(140px, 18vw, 220px);
  height: auto;
}

.linera-fv__sub {
  font-size: clamp(14px, 2vw, 18px);
  color: var(--linera-primary);
  letter-spacing: 0.2em;
  margin-bottom: clamp(15px, 2vw, 25px);
  font-weight: 500;
}

.linera-fv__catch {
  font-size: clamp(28px, 4.5vw, 48px);
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: clamp(20px, 3vw, 35px);
  color: var(--linera-text);
  letter-spacing: 0.05em;
}

.linera-fv__lead {
  font-size: clamp(14px, 1.8vw, 18px);
  line-height: 2;
  color: var(--linera-text-light);
}

.linera-fv__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.linera-fv__scroll span {
  display: block;
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--linera-primary);
  text-transform: uppercase;
  writing-mode: vertical-rl;
  padding-bottom: 60px;
  position: relative;
}

.linera-fv__scroll span::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 1px;
  height: 50px;
  background: var(--linera-primary);
  animation: scrollLine 1.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  51% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* ========================================
   Section Title
   ======================================== */
.linera-section-title {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--linera-text);
  margin-bottom: clamp(30px, 5vw, 50px);
}

.linera-section-title--center {
  text-align: center;
}

/* ========================================
   Section: Concept
   ======================================== */
.linera-concept {
  padding: clamp(80px, 12vw, 150px) 0;
  background-color: var(--linera-bg);
}

.linera-concept__inner {
  display: flex;
  align-items: center;
  gap: clamp(40px, 6vw, 80px);
}

.linera-concept__text {
  flex: 1;
}

.linera-concept__desc {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2.2;
  color: var(--linera-text);
  margin-bottom: 30px;
}

.linera-concept__note {
  font-size: 12px;
  color: var(--linera-text-light);
}

.linera-concept__images {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.linera-concept__images img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

@media (max-width: 900px) {
  .linera-concept__inner {
    flex-direction: column;
  }

  .linera-concept__images {
    flex-direction: row;
    width: 100%;
  }

  .linera-concept__images img {
    width: calc(50% - 7.5px);
  }
}

/* ========================================
   Section: Feature
   ======================================== */
.linera-feature {
  padding: clamp(80px, 12vw, 150px) 0;
  background-color: var(--linera-bg-gray);
}

.linera-feature__list {
  display: flex;
  flex-direction: column;
  gap: clamp(60px, 10vw, 120px);
}

.linera-feature__item {
  display: flex;
  align-items: center;
  gap: clamp(40px, 6vw, 80px);
}

.linera-feature__item--reverse {
  flex-direction: row-reverse;
}

.linera-feature__item-images {
  flex: 1;
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.linera-feature__item-images img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.linera-feature__item-images img:nth-child(2) {
  width: calc(50% - 7.5px);
}

.linera-feature__item-images img:first-child:nth-last-child(2) {
  width: calc(50% - 7.5px);
}

.linera-feature__item-content {
  flex: 1;
}

.linera-feature__num {
  display: inline-block;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  color: var(--linera-accent);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 15px;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.linera-feature__item-title {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: clamp(15px, 2vw, 25px);
  color: var(--linera-text);
}

.linera-feature__item-desc {
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 2;
  color: var(--linera-text-light);
}

@media (max-width: 900px) {
  .linera-feature__item,
  .linera-feature__item--reverse {
    flex-direction: column;
  }

  .linera-feature__item-images {
    width: 100%;
  }
}

/* ========================================
   Section: Design Style
   ======================================== */
.linera-style {
  padding: clamp(80px, 12vw, 150px) 0;
  background-color: var(--linera-bg);
}

.linera-style__tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: clamp(40px, 6vw, 60px);
  flex-wrap: wrap;
}

.linera-style__tab {
  padding: clamp(12px, 1.5vw, 16px) clamp(24px, 3vw, 40px);
  font-size: clamp(13px, 1.4vw, 15px);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--linera-text-light);
  background: transparent;
  border: 2px solid var(--linera-border);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
}

.linera-style__tab:hover {
  border-color: var(--linera-primary);
  color: var(--linera-primary);
}

.linera-style__tab.is-active {
  background: var(--linera-primary);
  border-color: var(--linera-primary);
  color: #ffffff;
}

.linera-style__panels {
  position: relative;
}

.linera-style__panel {
  display: none;
  animation: fadeIn 0.5s ease;
}

.linera-style__panel.is-active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.linera-style__panel-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(30px, 4vw, 50px);
}

.linera-style__panel-images {
  width: 100%;
  max-width: 900px;
  display: flex;
  gap: 15px;
  align-items: flex-start;
}

.linera-style__panel-images img {
  min-width: 0;
  height: auto;
}

.linera-style__panel-img-main {
  flex: 1.5 1 0;
  border-radius: 4px;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.linera-style__panel-img-sub {
  flex: 1 1 0;
  border-radius: 4px;
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
}

.linera-style__panel-content {
  text-align: center;
  max-width: 700px;
}

.linera-style__panel-title {
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--linera-text);
  margin-bottom: clamp(15px, 2vw, 25px);
  line-height: 1.4;
}

.linera-style__panel-title span {
  display: block;
  font-size: clamp(13px, 1.4vw, 15px);
  font-weight: 400;
  color: var(--linera-text-light);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

.linera-style__panel-desc {
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 2;
  color: var(--linera-text-light);
}

@media (max-width: 768px) {
  .linera-style__panel-images {
    flex-direction: column;
  }

  .linera-style__panel-img-main,
  .linera-style__panel-img-sub {
    flex: none;
    width: 100%;
  }
}

/* ========================================
   Section: Performance
   ======================================== */
.linera-performance {
  padding: clamp(80px, 12vw, 150px) 0;
  background-color: var(--linera-bg-warm);
}

.linera-performance__header {
  text-align: center;
  margin-bottom: clamp(50px, 8vw, 80px);
}

.linera-performance__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2;
  color: var(--linera-text-light);
}

.linera-performance__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(15px, 2vw, 25px);
  margin-bottom: clamp(60px, 8vw, 100px);
}

.linera-performance__card {
  background: #ffffff;
  border-radius: 12px;
  padding: clamp(25px, 3vw, 40px) clamp(20px, 2.5vw, 30px);
  text-align: center;
  box-shadow: 0 5px 30px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.linera-performance__card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.linera-performance__card-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto clamp(15px, 2vw, 25px);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--linera-bg-gray) 0%, var(--linera-bg-warm) 100%);
  border-radius: 50%;
  color: var(--linera-primary);
}

.linera-performance__card-icon svg {
  width: 40px;
  height: 40px;
}

.linera-performance__card-title {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  color: var(--linera-text);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.linera-performance__card-subtitle {
  font-size: clamp(12px, 1.3vw, 14px);
  color: var(--linera-primary);
  font-weight: 500;
  margin-bottom: clamp(12px, 1.5vw, 18px);
}

.linera-performance__card-desc {
  font-size: clamp(13px, 1.3vw, 14px);
  line-height: 1.9;
  color: var(--linera-text-light);
  margin-bottom: clamp(15px, 2vw, 25px);
}

.linera-performance__card-data {
  padding-top: clamp(15px, 2vw, 20px);
  border-top: 1px solid var(--linera-border);
}

.linera-performance__card-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--linera-text-light);
  margin-bottom: 5px;
  text-transform: uppercase;
}

.linera-performance__card-value {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 700;
  color: var(--linera-primary);
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.2;
}

.linera-performance__card-value small {
  font-size: clamp(12px, 1.3vw, 14px);
  font-weight: 500;
  color: var(--linera-text-light);
  margin-left: 3px;
}

/* Benefits */
.linera-performance__benefits {
  background: linear-gradient(135deg, var(--linera-primary) 0%, var(--linera-primary-dark) 100%);
  border-radius: 16px;
  padding: clamp(40px, 5vw, 60px);
  color: #ffffff;
}

.linera-performance__benefits-title {
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 600;
  text-align: center;
  margin-bottom: clamp(25px, 4vw, 40px);
  letter-spacing: 0.05em;
}

.linera-performance__benefits-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(12px, 1.5vw, 20px) clamp(30px, 4vw, 60px);
}

.linera-performance__benefit {
  display: flex;
  align-items: center;
  gap: 12px;
}

.linera-performance__benefit-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.linera-performance__benefit-icon svg {
  width: 16px;
  height: 16px;
}

.linera-performance__benefit-text {
  font-size: clamp(13px, 1.4vw, 15px);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .linera-performance__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .linera-performance__benefits-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .linera-performance__grid {
    grid-template-columns: 1fr;
  }

  .linera-performance__card {
    max-width: 400px;
    margin: 0 auto;
  }
}

/* ========================================
   Section: Closing Message
   ======================================== */
.linera-closing {
  padding: clamp(60px, 10vw, 100px) 0;
  background-color: var(--linera-bg-gray);
  text-align: center;
}

.linera-closing__text {
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 500;
  line-height: 1.9;
  color: var(--linera-text);
  letter-spacing: 0.05em;
}

/* ========================================
   Section: CTA (unused)
   ======================================== */
.linera-cta {
  padding: clamp(80px, 12vw, 120px) 0;
  background-color: var(--linera-bg-gray);
}

.linera-cta__inner {
  text-align: center;
}

.linera-cta__lead {
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 2.2;
  color: var(--linera-text);
  margin-bottom: clamp(40px, 6vw, 60px);
}

.linera-cta__buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(15px, 2vw, 25px);
  max-width: 1000px;
  margin: 0 auto;
}

.linera-cta__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(25px, 3vw, 40px) clamp(20px, 2.5vw, 30px);
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.3s ease;
  min-height: 140px;
}

.linera-cta__btn--primary {
  background: var(--linera-primary);
  color: #ffffff;
}

.linera-cta__btn--primary:hover {
  background: var(--linera-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(90, 106, 92, 0.3);
}

.linera-cta__btn--secondary {
  background: var(--linera-gold);
  color: #ffffff;
}

.linera-cta__btn--secondary:hover {
  background: #a8904f;
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(184, 160, 106, 0.3);
}

.linera-cta__btn--tel {
  background: #ffffff;
  color: var(--linera-text);
  border: 2px solid var(--linera-border);
}

.linera-cta__btn--tel:hover {
  border-color: var(--linera-primary);
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
}

.linera-cta__btn-icon {
  margin-bottom: 12px;
}

.linera-cta__btn-icon svg {
  width: clamp(24px, 3vw, 32px);
  height: clamp(24px, 3vw, 32px);
}

.linera-cta__btn-text {
  font-size: clamp(13px, 1.4vw, 15px);
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.5;
}

.linera-cta__btn-text small {
  display: block;
  font-size: clamp(11px, 1.2vw, 12px);
  font-weight: 400;
  opacity: 0.7;
  margin-bottom: 5px;
}

@media (max-width: 768px) {
  .linera-cta__buttons {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .linera-cta__btn {
    flex-direction: row;
    min-height: auto;
    padding: 20px 25px;
    gap: 15px;
  }

  .linera-cta__btn-icon {
    margin-bottom: 0;
  }

  .linera-cta__btn-text {
    text-align: left;
  }
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 768px) {
  .linera-fv {
    height: auto;
    min-height: 100vh;
    padding: 100px 0 80px;
  }

  .linera-fv__bg::after {
    background: linear-gradient(
      to bottom,
      rgba(255, 255, 255, 0.95) 0%,
      rgba(255, 255, 255, 0.85) 50%,
      rgba(255, 255, 255, 0.6) 100%
    );
  }

  .linera-fv__content {
    max-width: 100%;
    text-align: center;
  }

  .linera-fv__logo {
    display: flex;
    justify-content: center;
  }
}

/* ========================================
   Smooth Scroll & Accessibility
   ======================================== */
@media (prefers-reduced-motion: no-preference) {
  .linera-page {
    scroll-behavior: smooth;
  }
}

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

/* Focus States for Accessibility */
.linera-style__tab:focus,
.linera-btn:focus,
.linera-cta__btn:focus {
  outline: 3px solid var(--linera-accent);
  outline-offset: 3px;
}

.linera-style__tab:focus:not(:focus-visible),
.linera-btn:focus:not(:focus-visible),
.linera-cta__btn:focus:not(:focus-visible) {
  outline: none;
}