/* =============================================
   BLACK & WHITE CONSULTORIA — DESIGN SYSTEM
   Dark Mode · Brutalist Luxury
   ============================================= */

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

:root {
  --black:   #050505;
  --black-2: #0E0E0E;
  --black-3: #151515;
  --black-4: #1C1C1C;
  --white:   #F5F3EE;
  --gray-1:  #EBEBEB;
  --gray-2:  #A8A8A8;
  --gray-3:  #555555;
  --red:     #8B0000;
  --red-light: #A80000;

  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans:  'Inter', system-ui, sans-serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  --container: 1100px;
  --section-gap: 9rem;
}

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

body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* =============================================
   INTRO SPLASH SCREEN
   ============================================= */
.intro-screen {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: all;
  overflow: hidden;
}

.intro-bg {
  position: absolute;
  inset: 0;
  background: #050505;
}

/* Two curtain panels for the exit animation */
.intro-bg::before,
.intro-bg::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  background: #050505;
  transition: transform 0.9s cubic-bezier(0.76, 0, 0.24, 1);
}
.intro-bg::before { left: 0; transform: translateX(0); }
.intro-bg::after  { right: 0; transform: translateX(0); }

.intro-screen.exit .intro-bg::before { transform: translateX(-100%); }
.intro-screen.exit .intro-bg::after  { transform: translateX(100%); }

.intro-screen.exit .intro-content,
.intro-screen.exit .intro-progress {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.intro-screen.done {
  pointer-events: none;
  display: none;
}

.intro-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Logo wrapper — clips the logo so it slides up from bottom */
.intro-logo-wrap {
  overflow: hidden;
  padding: 0.5rem;
}

.intro-logo {
  height: 140px;
  width: auto;
  mix-blend-mode: screen;
  filter: invert(1);
  opacity: 0;
  transform: translateY(30px);
  animation: introLogoIn 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

@keyframes introLogoIn {
  to { opacity: 0.95; transform: translateY(0); }
}

/* Tagline — each letter fades in staggered */
.intro-tagline {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.5em;
  color: var(--gray-3);
  text-transform: uppercase;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
}

.intro-tag-char {
  opacity: 0;
  animation: introCharIn 0.4s ease forwards;
}

/* JS assigns animation-delay per character */

@keyframes introCharIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Progress bar at bottom */
.intro-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(245,243,238,0.06);
  z-index: 2;
  transition: opacity 0.3s ease;
}

.intro-progress-bar {
  height: 100%;
  width: 0%;
  background: rgba(245,243,238,0.3);
  transition: width 0.1s linear;
}

/* Global noise overlay */

body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- TYPOGRAPHY UTILITIES --- */
.section-pre {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--gray-3);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--gray-3);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}
.section-title em {
  font-style: italic;
  color: var(--gray-2);
}

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 1rem 2rem;
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out),
              background-color 0.3s var(--ease-out),
              color 0.3s var(--ease-out),
              border-color 0.3s var(--ease-out);
  cursor: pointer;
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(245,243,238,0.25);
  color: var(--white);
}
.btn-ghost:hover {
  background: rgba(245,243,238,0.06);
  border-color: rgba(245,243,238,0.5);
  transform: scale(1.03);
}

.btn-icon {
  opacity: 0.7;
  font-size: 0.8rem;
}

.btn-solid {
  background: var(--white);
  border: 1px solid var(--white);
  color: var(--black);
  font-weight: 600;
}
.btn-solid:hover {
  background: var(--gray-1);
  transform: scale(1.03);
}

/* =============================================
   HEADER
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.25rem 2rem;
  transition: background 0.4s var(--ease-out),
              backdrop-filter 0.4s var(--ease-out),
              padding 0.4s var(--ease-out);
}

.header.scrolled {
  background: rgba(5,5,5,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.9rem 2rem;
  border-bottom: 1px solid rgba(245,243,238,0.06);
}

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

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

.logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: screen;
  filter: invert(1);
  opacity: 0.92;
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.logo-img:hover {
  opacity: 1;
  transform: scale(1.04);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(139,0,0,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 80% at 20% 80%, rgba(30,30,30,0.8) 0%, transparent 60%),
    linear-gradient(180deg, #050505 0%, #0A0A0A 100%);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 79px,
      rgba(245,243,238,0.025) 80px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 79px,
      rgba(245,243,238,0.025) 80px
    );
  z-index: 1;
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 900px;
}

.hero-pretitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.35em;
  color: var(--gray-3);
  text-transform: uppercase;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
}

.hero-title-line {
  display: block;
  opacity: 0;
  transform: translateY(30px);
}

.hero-title-line.line-1 { animation: fadeUp 0.9s var(--ease-out) 0.4s forwards; }
.hero-title-line.line-2 { animation: fadeUp 0.9s var(--ease-out) 0.55s forwards; }
.hero-title-line.line-3 { animation: fadeUp 0.9s var(--ease-out) 0.7s forwards; }

.hero-title em {
  font-style: italic;
  color: var(--gray-2);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--gray-2);
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto 2.5rem;
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.9s var(--ease-out) 0.9s forwards;
}

.hero-cta-wrap {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.9s var(--ease-out) 1.1s forwards;
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  z-index: 3;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 1.5s forwards;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(245,243,238,0.4), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* =============================================
   PAIN SECTION
   ============================================= */
.pain-section {
  padding: var(--section-gap) 0;
  border-top: 1px solid rgba(245,243,238,0.06);
}

.section-header {
  max-width: 640px;
  margin-bottom: 4rem;
}

.section-desc {
  margin-top: 1.5rem;
  font-size: 1rem;
  color: var(--gray-2);
  line-height: 1.8;
}
.section-desc strong {
  color: var(--white);
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(245,243,238,0.06);
  border: 1px solid rgba(245,243,238,0.06);
  border-radius: 4px;
  overflow: hidden;
}

.pain-card {
  background: var(--black-2);
  position: relative;
  overflow: hidden;
  transition: background 0.4s var(--ease-out);
}

.pain-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--red) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
}

.pain-card:hover {
  background: var(--black-3);
}

.pain-card:hover::before {
  opacity: 0.06;
}

.pain-card-inner {
  padding: 2.5rem;
  position: relative;
  z-index: 1;
}

.pain-num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--gray-3);
  display: block;
  margin-bottom: 1.25rem;
}

.pain-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.75rem;
}

.pain-desc {
  font-size: 0.9rem;
  color: var(--gray-2);
  line-height: 1.7;
}

/* =============================================
   MECHANISM SECTION
   ============================================= */
.mechanism-section {
  padding: var(--section-gap) 0;
  position: relative;
}

.mechanism-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245,243,238,0.1), transparent);
}

.mechanism-header {
  margin-bottom: 5rem;
}

.mechanism-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.01em;
  color: var(--white);
  margin-top: 1rem;
}

.mechanism-title em {
  font-style: italic;
  color: var(--gray-2);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  background: rgba(245,243,238,0.08);
}

.pillar-card {
  background: var(--black);
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
  transition: background 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.pillar-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}

.pillar-card:hover {
  background: var(--black-3);
}

.pillar-card:hover::after {
  transform: scaleX(1);
}

.pillar-icon {
  color: var(--gray-3);
  transition: color 0.3s;
}

.pillar-card:hover .pillar-icon {
  color: var(--white);
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--gray-3);
}

.pillar-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

.pillar-desc {
  font-size: 0.9rem;
  color: var(--gray-2);
  line-height: 1.75;
  margin-top: 0.25rem;
}

/* =============================================
   COMPARE SECTION
   ============================================= */
.compare-section {
  padding: var(--section-gap) 0;
  background: var(--black-2);
  border-top: 1px solid rgba(245,243,238,0.06);
  border-bottom: 1px solid rgba(245,243,238,0.06);
}

.compare-header {
  margin-bottom: 4rem;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: start;
}

.compare-col {
  padding: 2rem 0;
}

.compare-col-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(245,243,238,0.08);
}

.compare-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--gray-3);
}

.compare-label--bw {
  color: var(--white);
}

.compare-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.compare-list li {
  font-size: 0.95rem;
  color: var(--gray-3);
  padding-left: 1rem;
  position: relative;
}

.compare-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--gray-3);
  opacity: 0.5;
  font-size: 0.7rem;
}

.compare-list--bw li {
  color: var(--white);
}

.compare-list--bw li::before {
  content: '✓';
  color: var(--red-light);
  opacity: 1;
  font-size: 0.65rem;
}

.compare-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem 3rem;
  padding-top: 2.5rem;
}

.divider-line {
  flex: 1;
  width: 1px;
  background: rgba(245,243,238,0.1);
}

.divider-vs {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--gray-3);
}

/* =============================================
   CLOSING SECTION
   ============================================= */
.closing-section {
  padding: var(--section-gap) 0;
}

.closing-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
}

.closing-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-style: italic;
  line-height: 1.3;
  color: var(--white);
}

.closing-body {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.closing-text {
  font-size: 1.05rem;
  color: var(--gray-2);
  line-height: 1.8;
}

.closing-text strong {
  color: var(--white);
}

.closing-divider {
  width: 48px;
  height: 1px;
  background: rgba(245,243,238,0.15);
}

.closing-warning {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--gray-3);
  line-height: 1.8;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  padding: 3rem 0 2.5rem;
  border-top: 1px solid rgba(245,243,238,0.06);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
}

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

.footer-logo {
  height: 72px;
  width: auto;
  mix-blend-mode: screen;
  filter: invert(1);
  opacity: 0.65;
  transition: opacity 0.3s var(--ease-out);
}

.footer-logo:hover { opacity: 0.9; }

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--gray-3);
  text-transform: uppercase;
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse 2s ease-in-out infinite;
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 0.9; transform: scaleY(1.1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 4px rgba(34,197,94,0); }
}

/* =============================================
   SCROLL-DRIVEN REVEAL
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  :root {
    --section-gap: 5rem;
  }

  .hero {
    padding: 7rem 1.5rem 5rem;
  }

  .hero-title {
    font-size: clamp(3rem, 14vw, 5.5rem);
  }

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

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

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

  .compare-divider {
    flex-direction: row;
    padding: 1.5rem 0;
  }

  .divider-line {
    height: 1px;
    width: auto;
    flex: 1;
  }

  .mechanism-title {
    font-size: clamp(2.2rem, 10vw, 4rem);
  }

  .container {
    padding: 0 1.25rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: clamp(2.6rem, 16vw, 4rem);
  }

  .pillar-card {
    padding: 2rem 1.5rem;
  }

  .pain-card-inner {
    padding: 1.75rem;
  }
}