/* ==============================
   株式会社知らんがな | Shirangana Inc.
   Main Stylesheet
   ============================== */

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

:root {
  --primary: #6C3BF5;
  --primary-dark: #5228CC;
  --primary-light: #8B5CF6;
  --secondary: #F472B6;
  --accent: #06D6A0;
  --bg-dark: #0B0B1A;
  --bg-card: #13132B;
  --bg-card-hover: #1A1A3E;
  --text-primary: #F1F1F7;
  --text-secondary: #9494B8;
  --text-muted: #6B6B8D;
  --gradient-main: linear-gradient(135deg, #6C3BF5, #F472B6);
  --gradient-hero: linear-gradient(135deg, #0B0B1A, #1A0A2E);
  --gradient-card: linear-gradient(145deg, rgba(108, 59, 245, 0.08), rgba(244, 114, 182, 0.05));
  --border-color: rgba(108, 59, 245, 0.2);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* Typography */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--primary-light);
  margin-bottom: 16px;
  position: relative;
}

.section-tag::before,
.section-tag::after {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--primary-light);
  vertical-align: middle;
  margin: 0 12px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 auto;
}

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-main);
  color: white;
  box-shadow: 0 4px 20px rgba(108, 59, 245, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 59, 245, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--primary-light);
  background: rgba(108, 59, 245, 0.1);
  transform: translateY(-2px);
}

/* ==============================
   Navigation
   ============================== */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(11, 11, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(108, 59, 245, 0.15);
  padding: 12px 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
}

.logo-icon {
  font-size: 1.6rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
}

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

.nav-cta {
  background: var(--gradient-main);
  color: white !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
}

.nav-cta::after { display: none; }
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(108, 59, 245, 0.4); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ==============================
   Hero Section
   ============================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.gradient-sphere {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 59, 245, 0.25), transparent 70%);
  top: -150px;
  right: -100px;
  animation: floatSphere 8s ease-in-out infinite;
}

.gradient-sphere::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 114, 182, 0.15), transparent 70%);
  bottom: -200px;
  left: -200px;
  animation: floatSphere 10s ease-in-out infinite reverse;
}

@keyframes floatSphere {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.05); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(108, 59, 245, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 59, 245, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 820px;
}

.hero-badge {
  display: inline-block;
  background: rgba(108, 59, 245, 0.15);
  border: 1px solid rgba(108, 59, 245, 0.3);
  color: var(--primary-light);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease;
}

.hero-title {
  margin-bottom: 24px;
}

.title-line {
  display: block;
  font-size: clamp(3rem, 10vw, 5.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.title-line:first-child {
  animation: fadeInUp 0.6s ease 0.1s both;
}

.title-line.accent {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: clamp(1rem, 2vw, 1.2rem);
  margin-bottom: 40px;
  line-height: 1.8;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  animation: fadeInUp 0.6s ease 0.5s both;
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item + .stat-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: rgba(108, 59, 245, 0.3);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-plus, .stat-unit {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-light);
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==============================
   Services Section
   ============================== */
.services {
  padding: 120px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(108, 59, 245, 0.4);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card > p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
  line-height: 1.7;
}

.card-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-features li {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ==============================
   About Section
   ============================== */
.about {
  padding: 120px 24px;
  background: radial-gradient(ellipse at 50% 0%, rgba(108, 59, 245, 0.05), transparent 70%);
}

.about-container {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-content .section-title {
  text-align: left;
}

.about-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-text strong {
  color: var(--text-primary);
  font-weight: 700;
}

.about-mission {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.mission-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.mission-item:hover {
  background: var(--bg-card-hover);
  transform: translateX(8px);
}

.mission-number {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  min-width: 40px;
}

.mission-text {
  font-weight: 500;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-illust {
  position: relative;
  width: 280px;
  height: 280px;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.illust-emoji {
  font-size: 5rem;
}

.illust-bubble {
  position: absolute;
  top: 40px;
  right: -20px;
  background: var(--gradient-main);
  color: white;
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 4px 20px rgba(108, 59, 245, 0.4);
  animation: float 4s ease-in-out infinite reverse;
}

/* ==============================
   Works Section
   ============================== */
.works {
  padding: 120px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.work-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 59, 245, 0.4);
}

.work-thumb {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
  position: relative;
  overflow: hidden;
}

.work-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, var(--bg-card));
}

.work-emoji {
  font-size: 3.5rem;
  z-index: 1;
  transition: var(--transition);
}

.work-card:hover .work-emoji {
  transform: scale(1.2);
}

.work-info {
  padding: 20px;
}

.work-category {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary-light);
  margin-bottom: 8px;
}

.work-info h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.work-info p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ==============================
   Team Section
   ============================== */
.team {
  padding: 120px 24px;
  background: radial-gradient(ellipse at 50% 100%, rgba(244, 114, 182, 0.05), transparent 70%);
}

.team-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: var(--transition);
}

.team-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(108, 59, 245, 0.4);
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.team-avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 20px;
  background: var(--gradient-card);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.team-card:hover .team-avatar {
  border-color: var(--primary-light);
  box-shadow: 0 0 30px rgba(108, 59, 245, 0.3);
}

.avatar-emoji {
  font-size: 2.8rem;
}

.team-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-role {
  display: block;
  font-size: 0.8rem;
  color: var(--primary-light);
  font-weight: 500;
  margin-bottom: 12px;
}

.team-card p {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

/* ==============================
   Contact Section
   ============================== */
.contact {
  padding: 120px 24px;
  max-width: 700px;
  margin: 0 auto;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.required {
  color: var(--secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(108, 59, 245, 0.15);
  background: rgba(255,255,255,0.06);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 16px 32px;
  font-size: 1rem;
  margin-top: 8px;
}

.btn-arrow {
  transition: var(--transition);
}

.btn-submit:hover .btn-arrow {
  transform: translateX(4px);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 20px 32px;
  color: var(--text-primary);
  font-weight: 500;
  text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
  opacity: 0;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2000;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ==============================
   Footer
   ============================== */
.footer {
  background: rgba(255,255,255,0.02);
  border-top: 1px solid rgba(108, 59, 245, 0.1);
  padding: 64px 24px 24px;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 64px;
  margin-bottom: 48px;
}

.footer-brand .logo-text {
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 12px;
  line-height: 1.8;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h5 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 10px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(108, 59, 245, 0.1);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ==============================
   Responsive
   ============================== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(11, 11, 26, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 100px 32px 32px;
    gap: 20px;
    transition: var(--transition);
    border-left: 1px solid var(--border-color);
    align-items: flex-start;
  }

  .nav-menu.active {
    right: 0;
  }

  .hamburger {
    display: flex;
    z-index: 1001;
  }

  .pc-br { display: none; }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .stat-item + .stat-item::before { display: none; }

  .stat-number { font-size: 2rem; }

  .about-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-illust {
    width: 200px;
    height: 200px;
  }

  .illust-emoji { font-size: 3.5rem; }
  .illust-bubble { font-size: 0.75rem; padding: 6px 16px; top: 20px; right: -10px; }

  .contact-form {
    padding: 28px 20px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

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