@charset "UTF-8";

/* ==========================================================================
   RIVELAS - Profound Luxury Theme
   Monolithic Elegance, Heavy & Premium
   ========================================================================== */

/* --- Variables --- */
:root {
  /* Colors */
  --bg-base: #0a0a0a;
  --bg-surface: #111111;
  --bg-alt: #161616;
  
  --text-main: #Eaeaea;
  --text-muted: #888888;
  --text-dark: #333333;
  
  --accent-gold: #c5a97a;
  --accent-gold-dim: rgba(197, 169, 122, 0.3);
  --accent-line: rgba(255, 255, 255, 0.1);

  /* Typography */
  --font-en: 'Cormorant Garamond', serif;
  --font-ja: 'Shippori Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  
  /* Layout */
  --max-width: 1280px;
  --section-padding: 10rem 0;
  
  /* Animation */
  --transition-slow: 1s cubic-bezier(0.2, 0, 0.1, 1);
  --transition-med: 0.6s cubic-bezier(0.2, 0, 0.1, 1);
}

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

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

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-ja);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  letter-spacing: 0.08em;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  line-height: 1.3;
}

.en-text {
  font-family: var(--font-en);
}

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

a:hover {
  color: var(--accent-gold);
}

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

ul {
  list-style: none;
}

.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* --- Typography Classes --- */
.heading-xl {
  font-family: var(--font-en);
  font-size: clamp(4.5rem, 15vw, 11rem);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
}

.heading-lg {
  font-family: var(--font-ja);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: 0.15em;
  margin-bottom: 2rem;
  font-weight: 400;
}

.heading-en-lg {
  font-family: var(--font-en);
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: 0.05em;
  font-style: italic;
  color: var(--accent-gold);
}

.eyebrow {
  display: block;
  font-family: var(--font-en);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--accent-gold);
  margin-bottom: 1rem;
}

.body-text {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 2;
}

/* --- UI Elements --- */
.line-separator {
  width: 1px;
  height: 60px;
  background-color: var(--accent-gold);
  margin: 2rem auto;
}

.horizontal-line {
  height: 1px;
  width: 100%;
  background-color: var(--accent-line);
  margin: 4rem 0;
}

.btn-luxury {
  display: inline-block;
  padding: 1rem 3rem;
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  font-family: var(--font-en);
  font-size: 0.875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-med);
  background: transparent;
}

.btn-luxury::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: var(--accent-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-med);
  z-index: -1;
}

.btn-luxury:hover {
  color: var(--bg-base);
}

.btn-luxury:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 100;
  padding: 2rem 0;
  transition: all var(--transition-med);
}

.site-header.scrolled {
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  border-bottom: 1px solid var(--accent-line);
}

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

.logo {
  font-family: var(--font-en);
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  color: #fff;
}

.nav-links {
  display: flex;
  gap: 3rem;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-en);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-main);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 100%; height: 1px;
  background: var(--accent-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 8px;
  z-index: 101;
}

.mobile-toggle span {
  display: block;
  width: 30px;
  height: 1px;
  background: #fff;
  transition: var(--transition-med);
}

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav a {
  font-family: var(--font-en);
  font-size: 2rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
  padding-bottom: 25vh;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  animation: slowZoom 20s ease-out forwards;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) brightness(0.3);
}

@keyframes slowZoom {
  0% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 5rem;
}

.hero-subtitle {
  font-family: var(--font-ja);
  font-size: clamp(0.65rem, 3.5vw, 1rem);
  letter-spacing: 0.2em;
  color: var(--accent-gold);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 1.5s 0.5s forwards ease-out;
  white-space: nowrap;
}

@media (min-width: 768px) {
  .hero-subtitle {
    letter-spacing: 0.4em;
  }
}

.hero-title {
  opacity: 0;
  animation: fadeUp 1.5s 1s forwards ease-out;
}

@keyframes fadeUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

.hero-scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  animation: fadeUp 1.5s 1.5s forwards ease-out;
}

.hero-scroll span {
  font-family: var(--font-en);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: 1rem;
  writing-mode: vertical-rl;
}

.hero-scroll-line {
  width: 1px;
  height: 80px;
  background: rgba(255,255,255,0.1);
  position: relative;
  overflow: hidden;
}

.hero-scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 1px; height: 100%;
  background: var(--accent-gold);
  animation: scrollLineDrop 2.5s infinite;
}

@keyframes scrollLineDrop {
  0% { transform: translateY(-100%); }
  50% { transform: translateY(100%); }
  100% { transform: translateY(100%); }
}

/* --- Section Shared --- */
.section {
  padding: var(--section-padding);
}

/* --- Value Proposition --- */
.value-prop-section {
  background: var(--bg-surface);
}

.value-prop-header {
  text-align: center;
  margin-bottom: 6rem;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4rem;
}

.value-item {
  border-top: 1px solid var(--accent-gold);
  padding-top: 2rem;
}

.value-num {
  font-family: var(--font-en);
  font-size: 2rem;
  color: var(--accent-gold);
  margin-bottom: 1.5rem;
  display: block;
}

.value-item h3 {
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.value-item p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 2.2;
}

/* --- Services (Editorial Layout) --- */
.service-block {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 6rem;
  align-items: center;
  margin-bottom: 10rem;
}

.service-block:nth-child(even) {
  grid-template-columns: 7fr 5fr;
}

.service-block:nth-child(even) .service-visual {
  order: 2;
}
.service-block:nth-child(even) .service-content {
  order: 1;
}

.service-visual {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/5;
}

.service-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.2);
  transition: filter var(--transition-slow), transform var(--transition-slow);
}

.service-block:hover .service-visual img {
  filter: grayscale(30%) contrast(1.1);
  transform: scale(1.03);
}

.service-num-large {
  font-family: var(--font-en);
  font-size: clamp(4rem, 10vw, 8rem);
  color: var(--bg-surface);
  line-height: 1;
  position: absolute;
  top: -2rem;
  left: -2rem;
  z-index: -1;
}

.service-content h3 {
  font-size: 1.75rem;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--accent-line);
  padding-bottom: 1.5rem;
}

.service-content p {
  color: var(--text-muted);
  line-height: 2.2;
  margin-bottom: 2rem;
}

.service-tags {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.service-tag {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold-dim);
  padding: 0.5rem 1rem;
}

/* --- Pricing (Minimalist Menu) --- */
.pricing-section {
  background: var(--bg-surface);
}

.pricing-container {
  max-width: 900px;
  margin: 0 auto;
}

.pricing-menu {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 5rem;
  border-bottom: 1px solid var(--accent-line);
}

.pricing-tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-ja);
  font-size: 1rem;
  letter-spacing: 0.1em;
  padding: 1rem 0;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-med);
}

.pricing-tab.active {
  color: var(--text-main);
}

.pricing-tab::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 100%; height: 1px;
  background: var(--accent-gold);
  transform: scaleX(0);
  transition: transform var(--transition-med);
}

.pricing-tab.active::after {
  transform: scaleX(1);
}

.pricing-panel {
  display: none;
  animation: subtleFade 0.8s ease forwards;
}

.pricing-panel.active {
  display: block;
}

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

.pricing-list {
  display: flex;
  flex-direction: column;
}

.pricing-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 2rem 0;
  border-bottom: 1px dashed var(--accent-line);
}

.pricing-item-detail {
  max-width: 60%;
}

.pricing-item h4 {
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.pricing-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pricing-item-price {
  font-family: var(--font-en);
  font-size: 1.75rem;
  color: var(--accent-gold);
  text-align: right;
}

.pricing-item-price small {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-family: var(--font-ja);
  display: block;
}

/* --- Founder (Cinematic Block) --- */
.founder-block {
  position: relative;
  padding: 8rem 0;
}

.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}

.founder-visual {
  position: relative;
}

.founder-visual img {
  width: 100%;
  filter: grayscale(100%);
}

.founder-content {
  padding-left: 2rem;
  border-left: 1px solid var(--accent-gold);
}

.founder-quote {
  font-family: var(--font-ja);
  font-size: 1.5rem;
  line-height: 2;
  margin-bottom: 3rem;
  color: var(--text-main);
}

.founder-text {
  color: var(--text-muted);
  margin-bottom: 3rem;
}

.founder-text p {
  margin-bottom: 1.5rem;
}

.founder-sig {
  font-family: var(--font-en);
  font-size: 1.25rem;
  color: var(--accent-gold);
  letter-spacing: 0.2em;
}

/* --- Contact --- */
.contact-section {
  text-align: center;
  background: var(--bg-surface);
  padding: 10rem 0;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 4rem;
}

.contact-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.contact-link span {
  font-family: var(--font-en);
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color var(--transition-med);
}

.contact-link:hover span {
  color: var(--accent-gold);
}

/* --- Footer --- */
.site-footer {
  padding: 4rem 0;
  text-align: center;
  border-top: 1px solid var(--accent-line);
}

.footer-logo {
  font-family: var(--font-en);
  font-size: 1.5rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-copy {
  font-family: var(--font-en);
  color: var(--text-dark);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

/* --- Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s cubic-bezier(0.2, 0, 0.1, 1), transform 1.2s cubic-bezier(0.2, 0, 0.1, 1);
}

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

.reveal-delay-1 { transition-delay: 0.2s; }
.reveal-delay-2 { transition-delay: 0.4s; }
.reveal-delay-3 { transition-delay: 0.6s; }

/* --- Responsive --- */
@media (max-width: 992px) {
  .service-block, .service-block:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .service-block:nth-child(even) .service-visual { order: 1; }
  .service-block:nth-child(even) .service-content { order: 2; }
  .service-visual {
    aspect-ratio: 16/9;
  }
  
  .founder-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .founder-content {
    border-left: none;
    border-top: 1px solid var(--accent-gold);
    padding-left: 0;
    padding-top: 3rem;
  }
  .value-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: flex; }
  .mobile-toggle.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
  .mobile-toggle.active span:nth-child(2) { opacity: 0; }
  .mobile-toggle.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
  
  :root {
    --section-padding: 6rem 0;
  }
  
  .pricing-menu {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    gap: 2rem;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .pricing-menu::-webkit-scrollbar {
    display: none;
  }
  .pricing-tab {
    white-space: nowrap;
    font-size: 0.875rem;
  }
  .contact-links {
    flex-direction: column;
    gap: 2rem;
  }
  .pricing-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .pricing-item-detail {
    max-width: 100%;
  }
  .pricing-item-price {
    align-self: flex-end;
  }
}