/* ── CUSTOM PROPERTIES ──────────────────────────────────────── */
:root {
  --color-bg:          #0d0d0d;
  --color-surface:     #1a1a1a;
  --color-surface-2:   #242424;
  --color-accent:      #ff5500;
  --color-accent-dark: #cc4400;
  --color-accent-glow: rgba(255, 85, 0, 0.25);
  --color-text:        #f0f0f0;
  --color-text-muted:  #999999;
  --color-border:      #2e2e2e;
  --color-success:     #22c55e;
  --color-error:       #ef4444;

  --font-display: 'Oswald', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-body:    'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;

  --font-size-xs:   0.75rem;
  --font-size-sm:   0.875rem;
  --font-size-base: 1rem;
  --font-size-lg:   1.125rem;
  --font-size-xl:   1.5rem;
  --font-size-2xl:  2rem;
  --font-size-hero: clamp(2.4rem, 6vw, 4.5rem);

  --section-padding: clamp(4rem, 8vw, 8rem);
  --gap-sm:  1rem;
  --gap-md:  2rem;
  --gap-lg:  3rem;

  --container-max: 1200px;
  --container-pad: 1.5rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;

  --header-height: 70px;
}

/* ── RESET / BASE ───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* ── UTILITIES ──────────────────────────────────────────────── */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.accent {
  color: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--font-size-base);
  font-weight: 600;
  letter-spacing: 0.05em;
  border: 2px solid transparent;
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base),
              transform var(--transition-fast),
              box-shadow var(--transition-base);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  box-shadow: 0 4px 20px var(--color-accent-glow);
}

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

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

.btn-full {
  width: 100%;
}

/* ── REVEAL ANIMATION ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ── HEADER ─────────────────────────────────────────────────── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base);
}

#site-header.scrolled {
  background-color: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
  transform-origin: left;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

/* ── HAMBURGER ──────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  padding: 4px;
  z-index: 1100;
}

.hamburger span {
  display: block;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base),
              opacity var(--transition-base),
              background-color var(--transition-fast);
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── NAV OVERLAY ────────────────────────────────────────────── */
.nav-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 990;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: all;
}

/* ── HERO ───────────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(13, 13, 13, 0.55) 0%, rgba(26, 10, 0, 0.48) 100%),
    radial-gradient(ellipse at 70% 50%, rgba(255, 85, 0, 0.08) 0%, transparent 70%),
    url('../images/hero.webp') center/cover no-repeat;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 4rem;
  max-width: 720px;
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  animation: fadeInUp 0.8s ease both;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--font-size-hero);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-title .accent {
  display: inline;
  background: linear-gradient(135deg, #ff5500, #ff8c42);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-sub strong {
  color: var(--color-accent);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.3s both;
}

/* ── SCROLL INDICATOR ───────────────────────────────────────── */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-indicator span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator span::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 2px;
  animation: scrollBounce 1.8s ease infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  80%       { transform: translateX(-50%) translateY(12px); opacity: 0; }
}

/* ── SECTION COMMON ─────────────────────────────────────────── */
section {
  padding-block: var(--section-padding);
}

#services {
  background-color: var(--color-bg);
  position: relative;
}

#services::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/pricing-bg.webp') center/cover no-repeat;
  opacity: 0.07;
  z-index: 0;
}

#services .container {
  position: relative;
  z-index: 1;
}

#pricing  { background-color: var(--color-surface); }
#contact  { background-color: var(--color-bg); }

.section-header {
  text-align: center;
  margin-bottom: var(--gap-lg);
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.4em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-sub {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
}

/* ── SERVICES ───────────────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.18;
  z-index: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover::before {
  opacity: 0.32;
}

.service-card > * {
  position: relative;
  z-index: 1;
}

.service-card:nth-child(1)::before {
  background-image: url('../images/card1.webp');
}
.service-card:nth-child(2)::before {
  background-image: url('../images/card2.webp');
}
.service-card:nth-child(3)::before {
  background-image: url('../images/card3.webp');
}
.service-card:nth-child(4)::before {
  background-image: url('../images/card4.webp');
}
.service-card:nth-child(5)::before {
  background-image: url('../images/card5.webp');
}
.service-card:nth-child(6)::before {
  background-image: url('../images/card6.webp');
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  border-color: var(--color-accent);
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.service-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ── PRICING ────────────────────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.pricing-card {
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
  border-color: var(--color-accent);
  transform: scale(1.03);
  box-shadow: 0 0 40px var(--color-accent-glow);
  background-color: var(--color-surface);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-4px);
}

.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0.3rem 1rem;
  border-radius: 20px;
  white-space: nowrap;
}

.plan-name {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
  margin-bottom: 0.75rem;
}

.price-currency {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text-muted);
}

.price-amount {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
}

.pricing-card.featured .price-amount {
  color: var(--color-accent);
}

.price-period {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.plan-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.plan-features li {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.5;
}

.plan-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.pricing-note {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: 2.5rem;
}

.pricing-note strong {
  color: var(--color-accent);
}

/* ── CONTACT ────────────────────────────────────────────────── */
.contact-form {
  max-width: 680px;
  margin-inline: auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

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

.form-group input,
.form-group select,
.form-group textarea {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  padding: 0.75rem 1rem;
  outline: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  width: 100%;
}

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='%23999'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group select option {
  background-color: var(--color-surface);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group input.input-error,
.form-group select.input-error,
.form-group textarea.input-error {
  border-color: var(--color-error);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.error-msg {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  min-height: 1rem;
}

.contact-form > .form-group,
.contact-form > .btn {
  margin-bottom: 1.25rem;
}

.form-success {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-md);
  color: var(--color-success);
  font-size: var(--font-size-sm);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
}

.form-success svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ── FOOTER ─────────────────────────────────────────────────── */
#site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 3rem;
  padding-top: 3rem;
  padding-bottom: 2.5rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 2;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: right;
}

.footer-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-block: 1.25rem;
  text-align: center;
}

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

/* ── KEYFRAMES ──────────────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-inline: auto;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  #site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 80vw);
    background-color: var(--color-surface);
    border-left: 1px solid var(--color-border);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

  #site-nav.nav-open {
    transform: translateX(0);
  }

  .nav-links {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .nav-links a {
    font-size: var(--font-size-xl);
  }

  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 300px;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-nav ul {
    text-align: left;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --container-pad: 1rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }
}