/* ============================================
   HappyWebStudio - Custom Styles
   Base: Tailwind CSS (CDN)
   Accent: Emerald Green
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --emerald-50: #e6fbf4;
  --emerald-100: #c0f5e3;
  --emerald-200: #8eedc9;
  --emerald-300: #5ce5b2;
  --emerald-400: #4dd9b4;
  --emerald-500: #3cc8a4;
  --emerald-600: #2bb896;
  --emerald-700: #1fa383;
  --emerald-800: #168c6e;
  --emerald-900: #0d6b53;
  --gray-900: #1a1a2e;
  --gray-800: #2d2d3f;
  --gray-700: #4a4a5a;
  --gray-100: #f5f5f7;
  --gray-50: #fafafa;
  --white: #ffffff;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color .3s; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: #ffffff;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,.06);
  transition: background .3s, box-shadow .3s;
}

.site-header.scrolled {
  background: #ffffff;
  box-shadow: 0 1px 20px rgba(0,0,0,.06);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  display: flex;
  align-items: center;
}

.site-logo .logo-img {
  height: 80px;
  width: auto;
}

.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--gray-700);
  position: relative;
  padding: .25rem 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--emerald-500);
  transition: width .3s;
}
.nav-links a:hover { color: var(--emerald-600); }
.nav-links a:hover::after { width: 100%; }

.nav-contact-btn {
  background: var(--emerald-600) !important;
  color: #fff !important;
  padding: .5rem 1.25rem !important;
  border-radius: 6px;
  font-size: .85rem !important;
  font-weight: 600 !important;
  transition: background .3s, transform .2s !important;
}
.nav-contact-btn:hover {
  background: var(--emerald-700) !important;
  transform: translateY(-1px);
}
.nav-contact-btn::after { display: none !important; }

/* Mobile menu */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.mobile-toggle span {
  width: 24px; height: 2px;
  background: var(--gray-800);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .mobile-toggle { display: flex; margin-left: auto; }
  .nav-links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform .4s cubic-bezier(.4,0,.2,1), opacity .3s;
    border-bottom: 1px solid rgba(0,0,0,.06);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; }
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(2,6,22,.99) 0%, rgba(4,14,52,.96) 50%, rgba(10,34,92,.9) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1800&q=80') center/cover no-repeat;
  transform: scale(1.04);
  transform-origin: center;
  animation: heroVisualFloat 18s ease-in-out infinite alternate;
  will-change: transform;
  opacity: .42;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  opacity: .12;
  background-image:
    radial-gradient(circle at 20% 50%, var(--emerald-400) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, var(--emerald-300) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, var(--emerald-500) 0%, transparent 45%);
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  opacity: .42;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.flow-line {
  position: absolute;
  display: block;
  width: 240px;
  height: 2px;
  background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(120,220,255,.95) 45%, rgba(255,255,255,0) 100%);
  box-shadow: 0 0 18px rgba(120,220,255,.45);
  opacity: .5;
  border-radius: 999px;
  animation: flowLineMove 9s linear infinite;
}

.flow-line::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 8%;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(255,255,255,.95) 0%, rgba(120,220,255,.7) 55%, rgba(120,220,255,0) 100%);
  transform: translateY(-50%);
  box-shadow: 0 0 20px rgba(120,220,255,.7);
}

.flow-line-1 { top: 18%; left: -30%; transform: rotate(10deg); animation-duration: 10s; animation-delay: -2s; }
.flow-line-2 { top: 32%; left: -20%; transform: rotate(-8deg); animation-duration: 12s; animation-delay: -6s; }
.flow-line-3 { top: 48%; left: -35%; transform: rotate(6deg); animation-duration: 9s; animation-delay: -3s; }
.flow-line-4 { top: 62%; left: -25%; transform: rotate(-10deg); animation-duration: 11s; animation-delay: -7s; }
.flow-line-5 { top: 74%; left: -28%; transform: rotate(4deg); animation-duration: 13s; animation-delay: -5s; }
.flow-line-6 { top: 86%; left: -18%; transform: rotate(-6deg); animation-duration: 10.5s; animation-delay: -8s; }

@keyframes heroVisualFloat {
  0% {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  50% {
    transform: scale(1.08) translate3d(-1.2%, 0.8%, 0);
  }
  100% {
    transform: scale(1.12) translate3d(1.2%, -0.8%, 0);
  }
}

@keyframes flowLineMove {
  0% {
    transform: translate3d(0, 0, 0) scaleX(.85);
    opacity: 0;
  }
  15% {
    opacity: .28;
  }
  50% {
    transform: translate3d(85vw, -8px, 0) scaleX(1);
    opacity: .75;
  }
  100% {
    transform: translate3d(120vw, -16px, 0) scaleX(.92);
    opacity: 0;
  }
}

@media (max-width: 768px) {
  .hero::before {
    background-image: url('/assets/images/main.webp');
    background-position: center center;
    background-size: cover;
    transform: scale(1.02);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem 1.5rem;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(16,185,129,.15);
  border: 1px solid rgba(16,185,129,.3);
  border-radius: 50px;
  padding: .4rem 1.2rem;
  font-size: .8rem;
  font-weight: 500;
  color: var(--emerald-300);
  margin-bottom: 2rem;
  letter-spacing: .06em;
}

.hero-badge-dot {
  width: 6px; height: 6px;
  background: var(--emerald-400);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 1.25rem;
  letter-spacing: -.02em;
}

.hero h1 .text-accent {
  background: linear-gradient(135deg, var(--emerald-300), var(--emerald-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.6);
  font-weight: 400;
  letter-spacing: .08em;
  margin-bottom: 2.5rem;
}

.hero-cta-group { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--emerald-500);
  color: #fff;
  padding: .85rem 2rem;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background .3s, transform .2s, box-shadow .3s;
}
.btn-primary:hover {
  background: var(--emerald-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16,185,129,.3);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: transparent;
  color: rgba(255,255,255,.8);
  padding: .85rem 2rem;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 500;
  border: 1px solid rgba(255,255,255,.2);
  cursor: pointer;
  transition: background .3s, border-color .3s, color .3s;
}
.btn-outline:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.4);
  color: #fff;
}

/* ---------- Sections ---------- */
.section {
  padding: 7rem 1.5rem;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--emerald-600);
  margin-bottom: .75rem;
}

.section-label::before {
  content: '';
  width: 20px; height: 2px;
  background: var(--emerald-500);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -.02em;
  line-height: 1.3;
  margin-bottom: 1.25rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--gray-700);
  line-height: 2;
  max-width: 680px;
}

/* ---------- About ---------- */
.about-section {
  background: var(--gray-50);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.about-image-wrapper {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--emerald-100), var(--emerald-200));
}

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

.about-image-accent {
  position: absolute;
  bottom: -12px; right: -12px;
  width: 100px; height: 100px;
  border: 3px solid var(--emerald-400);
  border-radius: 16px;
  z-index: -1;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
}

.about-feature-icon {
  width: 40px; height: 40px;
  min-width: 40px;
  background: var(--emerald-100);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald-600);
  font-size: 1.1rem;
}

.about-feature h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: .2rem;
}

.about-feature p {
  font-size: .8rem;
  color: var(--gray-700);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-features { grid-template-columns: 1fr; }
}

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.service-card {
  background: #fff;
  border: 1px solid rgba(0,0,0,.06);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  transition: transform .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--emerald-400), var(--emerald-600));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s;
}

.service-card:hover { transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,.14); }
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px; height: 56px;
  background: var(--emerald-50);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--emerald-600);
  margin-bottom: 1.5rem;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: .75rem;
}

.service-card p {
  font-size: .92rem;
  color: var(--gray-700);
  line-height: 1.9;
}

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

/* ---------- Works ---------- */
.works-section { background: var(--gray-50); }

.works-tabs {
  display: flex;
  gap: .75rem;
  margin-top: 2.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.works-tab {
  padding: .5rem 1.25rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--gray-700);
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  cursor: pointer;
  transition: all .3s;
}

.works-tab:hover,
.works-tab.active {
  background: var(--emerald-600);
  color: #fff;
  border-color: var(--emerald-600);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.work-card-text {
  background: #fff;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,.06);
  padding: 1.75rem;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  transition: transform .3s, box-shadow .3s, border-color .3s;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .5rem;
  position: relative;
  overflow: hidden;
}

.work-card-text::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--emerald-400), var(--emerald-600));
  opacity: 0;
  transition: opacity .3s;
}

.work-card-text:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,.13);
  border-color: var(--emerald-200);
}
.work-card-text:hover::before { opacity: 1; }

.work-card-icon {
  width: 44px; height: 44px;
  background: var(--emerald-50);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald-600);
  margin-bottom: .25rem;
  transition: background .3s;
}
.work-card-text:hover .work-card-icon {
  background: var(--emerald-100);
}

.work-category {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--emerald-600);
}

.work-card-text h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .works-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
  .works-grid { grid-template-columns: 1fr; }
}

/* ---------- Contact ---------- */
.contact-section {
  background: var(--gray-900);
  color: #fff;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  margin-top: 3rem;
}

.contact-info-block .section-desc {
  color: rgba(255,255,255,.6);
}

.contact-info-items {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.contact-info-icon {
  width: 40px; height: 40px;
  min-width: 40px;
  background: rgba(16,185,129,.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald-400);
}

.contact-info-item p {
  font-size: .9rem;
  color: rgba(255,255,255,.7);
}

.contact-form {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px;
  padding: 2.5rem;
}

.form-group { margin-bottom: 1.5rem; }

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 500;
  color: rgba(255,255,255,.7);
  margin-bottom: .5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: .85rem 1rem;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  color: #fff;
  font-size: .95rem;
  font-family: inherit;
  outline: none;
  transition: border-color .3s, background .3s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--emerald-500);
  background: rgba(255,255,255,.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,.3);
}

.form-group textarea { resize: vertical; min-height: 140px; }

.btn-submit {
  width: 100%;
  padding: 1rem;
  background: var(--emerald-500);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background .3s, transform .2s, box-shadow .3s;
}
.btn-submit:hover {
  background: var(--emerald-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16,185,129,.3);
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--gray-900);
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 3rem 1.5rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
}

.footer-logo-img {
  height: 80px;
  width: auto;
}

.footer-links { display: flex; gap: 2rem; list-style: none; }
.footer-links a {
  font-size: .8rem;
  color: rgba(255,255,255,.5);
  transition: color .3s;
}
.footer-links a:hover { color: var(--emerald-400); }

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: .75rem;
  color: rgba(255,255,255,.3);
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,.06);
}

/* ---------- Scroll Animation ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s cubic-bezier(.4,0,.2,1), transform .7s cubic-bezier(.4,0,.2,1);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}