/* ============================================
   Piste AI EVANGELISTS - Main Stylesheet
   Color: Black + White + Gold
   ============================================ */

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

:root {
  --black: #1a1a1a;
  --dark: #2c2c2c;
  --white: #ffffff;
  --off-white: #f8f7f4;
  --gold: #c4a24e;
  --gold-light: #d4b96a;
  --gold-dark: #a8882e;
  --gray: #888888;
  --gray-light: #e0e0e0;
  --gray-bg: #f5f5f5;
  --text: #333333;
  --text-light: #666666;
  --font-main: 'Noto Sans JP', sans-serif;
  --font-en: 'Inter', sans-serif;
  --transition: 0.3s ease;
  --max-width: 1200px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  color: var(--text);
  line-height: 1.8;
  background: var(--white);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 100px 0;
}

.section-title {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.section-heading {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--black);
}

.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 700px;
  line-height: 2;
}

.section-desc.center {
  margin: 0 auto;
}

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

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

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

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

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

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

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

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 15px 0;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header.scrolled {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
  padding: 10px 0;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo img {
  height: 50px;
  /* original logo colors */
}

.header.scrolled .header-logo img {
  height: 40px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.header-nav a {
  color: var(--white);
  font-size: 0.85rem;
  letter-spacing: 1px;
  position: relative;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.3s ease;
}

.header-nav a:hover::after {
  width: 100%;
}

.header-cta {
  background: var(--gold);
  color: var(--white);
  padding: 10px 24px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.header-cta:hover {
  background: var(--gold-dark);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--black);
  z-index: 999;
  padding: 80px 30px 30px;
  transition: right 0.3s ease;
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav a {
  display: block;
  color: var(--white);
  padding: 15px 0;
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
}

.mobile-overlay.open {
  display: block;
}

/* --- Hero --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--black);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 50%, #1a1a1a 100%);
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(196, 162, 78, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(196, 162, 78, 0.05) 0%, transparent 50%);
}

/* Geometric lines */
.hero-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.hero-lines span {
  position: absolute;
  background: linear-gradient(to bottom, transparent, rgba(196, 162, 78, 0.1), transparent);
  width: 1px;
  height: 100%;
  animation: lineFade 4s ease-in-out infinite;
}

.hero-lines span:nth-child(1) { left: 20%; animation-delay: 0s; }
.hero-lines span:nth-child(2) { left: 40%; animation-delay: 1s; }
.hero-lines span:nth-child(3) { left: 60%; animation-delay: 2s; }
.hero-lines span:nth-child(4) { left: 80%; animation-delay: 3s; }

@keyframes lineFade {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 20px;
}

.hero-logo {
  width: 120px;
  margin: 0 auto 30px;
  /* original logo colors */
}

.hero-catch {
  font-size: 3rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.hero-catch .gold {
  color: var(--gold);
}

.hero-sub {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 50px;
  letter-spacing: 2px;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--gold);
  color: var(--white);
  padding: 16px 40px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 2px;
  border-radius: 4px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--gold-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(196, 162, 78, 0.3);
}

.btn-outline {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: var(--white);
  padding: 16px 40px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 2px;
  border-radius: 4px;
  transition: var(--transition);
  cursor: pointer;
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-family: var(--font-en);
}

.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.3);
  margin: 10px auto 0;
  animation: scrollLine 2s ease-in-out infinite;
}

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

/* --- Problems --- */
.problems {
  background: var(--off-white);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.problem-card {
  background: var(--white);
  padding: 40px 30px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}

.problem-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.problem-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
}

.problem-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.problem-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--black);
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* --- Services (Numbered Cards) --- */
.services {
  background: var(--white);
}

.service-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 100px;
}

.service-item:last-child {
  margin-bottom: 0;
}

.service-item.reverse {
  direction: rtl;
}

.service-item.reverse > * {
  direction: ltr;
}

.service-number {
  font-family: var(--font-en);
  font-size: 5rem;
  font-weight: 700;
  color: rgba(196, 162, 78, 0.15);
  line-height: 1;
  margin-bottom: 15px;
}

.service-item h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--black);
}

.service-item p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 2;
}

.service-image {
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--gray-bg);
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- Seminar --- */
.seminar {
  background: var(--black);
  color: var(--white);
}

.seminar .section-heading {
  color: var(--white);
}

.seminar .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

.seminar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.seminar-card {
  background: var(--dark);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
}

.seminar-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.seminar-thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #333 0%, #444 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.seminar-thumb img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.seminar-thumb .play-icon {
  width: 60px;
  height: 60px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.seminar-thumb .play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 16px solid var(--gold);
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  margin-left: 4px;
}

.seminar-info {
  padding: 25px;
}

.seminar-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.5;
}

.seminar-info .price {
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gold);
}

.seminar-more {
  text-align: center;
  margin-top: 50px;
}

.btn-gold-outline {
  display: inline-block;
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 14px 40px;
  font-size: 0.9rem;
  letter-spacing: 2px;
  border-radius: 4px;
  transition: var(--transition);
}

.btn-gold-outline:hover {
  background: var(--gold);
  color: var(--white);
}

/* --- Subscription --- */
.subscription {
  background: var(--off-white);
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.plan-card {
  background: var(--white);
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  position: relative;
  transition: var(--transition);
}

.plan-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.plan-card.recommended {
  border: 2px solid var(--gold);
}

.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gold);
  color: var(--white);
  padding: 4px 20px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
}

.plan-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--black);
}

.plan-price {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 5px;
}

.plan-price span {
  font-size: 1rem;
  color: var(--text-light);
}

.plan-period {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 25px;
}

.plan-features {
  text-align: left;
  margin-bottom: 30px;
}

.plan-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text);
  border-bottom: 1px solid var(--gray-bg);
  padding-left: 24px;
  position: relative;
}

.plan-features li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 700;
}

.plan-payment-note {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 15px;
}

/* --- Blog --- */
.blog {
  background: var(--white);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.blog-card {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  background: var(--white);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.blog-thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--gray-bg) 0%, var(--gray-light) 100%);
  overflow: hidden;
}

.blog-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-body {
  padding: 25px;
}

.blog-date {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--gray);
  margin-bottom: 8px;
}

.blog-body h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 10px;
  color: var(--black);
}

.blog-body p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* --- Profile --- */
.profile {
  background: var(--off-white);
}

.profile-inner {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 50px;
}

.profile-image {
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 4/5;
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-name {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--black);
}

.profile-role {
  font-size: 0.9rem;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 25px;
  letter-spacing: 1px;
}

.profile-text {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 2.2;
  margin-bottom: 25px;
}

/* --- LINE CTA --- */
.line-cta {
  background: var(--black);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.line-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(196, 162, 78, 0.08) 0%, transparent 70%);
}

.line-cta .container {
  position: relative;
  z-index: 1;
}

.line-cta .section-heading {
  color: var(--white);
}

.line-benefits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin: 40px 0;
}

.line-benefit {
  padding: 30px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.line-benefit-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 15px;
}

.line-benefit-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.line-benefit h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.line-benefit p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.btn-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #06C755;
  color: var(--white);
  padding: 18px 50px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  margin-top: 10px;
}

.btn-line:hover {
  background: #05a847;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(6, 199, 85, 0.3);
}

.btn-line svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
}

/* --- Contact --- */
.contact {
  background: var(--white);
}

.contact-form {
  max-width: 600px;
  margin: 50px auto 0;
}

.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--black);
}

.form-group label .required {
  background: var(--gold);
  color: var(--white);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.7rem;
  margin-left: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--gray-light);
  border-radius: 4px;
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(196, 162, 78, 0.1);
}

.form-group textarea {
  height: 150px;
  resize: vertical;
}

.form-submit {
  text-align: center;
}

/* --- News Accordion --- */
.news-detail.open {
  max-height: 300px !important;
}

.news-item:hover {
  box-shadow: 0 4px 15px rgba(0,0,0,0.1) !important;
}

/* --- Footer --- */
.footer {
  background: var(--black);
  color: rgba(255, 255, 255, 0.6);
  padding: 60px 0 30px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo img {
  height: 60px;
  /* original logo colors */
  margin-bottom: 15px;
}

.footer-desc {
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-nav h4,
.footer-links h4 {
  color: var(--white);
  font-size: 0.9rem;
  margin-bottom: 15px;
  letter-spacing: 1px;
}

.footer-nav a,
.footer-links a {
  display: block;
  padding: 5px 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.footer-nav a:hover,
.footer-links a:hover {
  color: var(--gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.footer-payment {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

/* --- LINE Floating Button --- */
.line-float {
  position: fixed;
  bottom: 25px;
  right: 25px;
  z-index: 900;
  width: 60px;
  height: 60px;
  background: #06C755;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(6, 199, 85, 0.4);
  transition: var(--transition);
  cursor: pointer;
}

.line-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(6, 199, 85, 0.5);
}

.line-float svg {
  width: 32px;
  height: 32px;
  fill: var(--white);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .service-item {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .service-item.reverse {
    direction: ltr;
  }

  .profile-inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .profile-image {
    max-width: 350px;
  }
}

@media (max-width: 768px) {
  #spot .container > div {
    grid-template-columns: 1fr !important;
  }

  .section {
    padding: 70px 0;
  }

  .section-heading {
    font-size: 1.5rem;
  }

  .header-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .hero-catch {
    font-size: 1.8rem;
  }

  .hero-sub {
    font-size: 0.9rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .problems-grid,
  .seminar-grid,
  .blog-grid,
  .line-benefits {
    grid-template-columns: 1fr;
  }

  .plan-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .service-number {
    font-size: 3.5rem;
  }
}