/* style.css — Presence Architecture
   Art direction: Premium executive video presence service → Architectural minimalism with warmth
   Palette: Warm blush/charcoal/brass — Aesop meets a top architecture firm
   Typography: Cormorant (display) + Satoshi (body) — editorial authority + clean readability
   Density: Spacious/editorial — generous whitespace, let environments breathe */

/* ===== DESIGN TOKENS ===== */
:root, [data-theme="light"] {
  /* Typography */
  --font-display: 'Cormorant', Georgia, serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Custom Warm Palette */
  --color-bg:             #F5F0EE;
  --color-surface:        #FAF7F5;
  --color-surface-2:      #FFFFFF;
  --color-surface-offset: #EDE8E4;
  --color-text:           #3D3D3B;
  --color-text-muted:     #7A7A78;
  --color-text-faint:     #B5B0AB;
  --color-primary:        #C4A882;
  --color-primary-hover:  #A88E6B;
  --color-primary-active: #917A5C;
  --color-divider:        #DDD8D3;
  --color-border:         #D4CFC9;
  --color-text-inverse:   #F5F0EE;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows (warm-tinted) */
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 60 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.2 0.02 60 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.2 0.02 60 / 0.12);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg:             #1C1B19;
  --color-surface:        #242320;
  --color-surface-2:      #2C2B28;
  --color-surface-offset: #1A1918;
  --color-text:           #E5E0DB;
  --color-text-muted:     #9A958E;
  --color-text-faint:     #5E5B56;
  --color-primary:        #C4A882;
  --color-primary-hover:  #D4BA96;
  --color-primary-active: #B09670;
  --color-divider:        #3A3835;
  --color-border:         #454240;
  --color-text-inverse:   #1C1B19;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #1C1B19;
    --color-surface:        #242320;
    --color-surface-2:      #2C2B28;
    --color-surface-offset: #1A1918;
    --color-text:           #E5E0DB;
    --color-text-muted:     #9A958E;
    --color-text-faint:     #5E5B56;
    --color-primary:        #C4A882;
    --color-primary-hover:  #D4BA96;
    --color-primary-active: #B09670;
    --color-divider:        #3A3835;
    --color-border:         #454240;
    --color-text-inverse:   #1C1B19;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

/* ===== GLOBAL ===== */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

@media (min-width: 1024px) {
  .container { padding-inline: var(--space-12); }
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 56ch;
}

/* ===== HEADER / NAV ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--scrolled {
  border-bottom-color: var(--color-divider);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .header-inner { padding-inline: var(--space-8); }
}

@media (min-width: 1024px) {
  .header-inner { padding-inline: var(--space-12); height: 80px; }
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* Logo text in nav */
.logo-text {
  font-family: var(--font-body);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1.4;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .logo-text { font-size: 0.77rem; }
}

@media (min-width: 1024px) {
  .logo-text { font-size: 0.825rem; letter-spacing: 0.22em; }
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav-desktop { display: flex; }
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
  padding: var(--space-2) 0;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.btn-cta {
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: #FFFFFF;
  background: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

@media (min-width: 768px) {
  .btn-cta { display: inline-flex; }
}

.btn-cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-cta:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Mobile menu */
.hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text);
}

@media (min-width: 768px) {
  .hamburger { display: none; }
}

.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.mobile-nav-cta {
  display: inline-flex;
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: #FFFFFF;
  background: var(--color-text);
  border-radius: var(--radius-sm);
  margin-top: var(--space-4);
}

.mobile-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  padding-top: calc(80px + var(--space-16));
  padding-bottom: var(--space-20);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .hero {
    padding-top: calc(80px + var(--space-20));
    padding-bottom: var(--space-24);
  }
}



.hero-content {
  text-align: center;
  margin-bottom: var(--space-12);
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .hero-content { margin-bottom: var(--space-16); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.01em;
}

@media (min-width: 768px) {
  .hero-title { font-size: var(--text-3xl); }
}

@media (min-width: 1024px) {
  .hero-title { font-size: var(--text-hero); font-size: clamp(3rem, 0.5rem + 5.5vw, 6rem); }
}

.hero-image {
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 48ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .hero-subtitle { font-size: var(--text-lg); }
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-primary);
  transition: color var(--transition-interactive),
              border-color var(--transition-interactive);
}

.hero-cta:hover {
  color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.hero-cta svg {
  transition: transform var(--transition-interactive);
}

.hero-cta:hover svg {
  transform: translateY(2px);
}

.hero-image {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== PROBLEM SECTION ===== */
.problem {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.problem-inner {
  max-width: 720px;
  margin-inline: auto;
  text-align: center;
}

.problem-text {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 60ch;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .problem-text { font-size: var(--text-lg); }
}

/* ===== THE SYSTEM ===== */
.system {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  background: var(--color-surface);
}

.system-grid {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-12);
}

@media (min-width: 768px) {
  .system-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .system-grid { gap: var(--space-10); }
}

.system-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}

@media (min-width: 768px) {
  .system-card { text-align: left; }
}

.system-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-6);
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .system-card-icon { margin-inline: 0; }
}

.system-card-icon svg {
  width: 48px;
  height: 48px;
}

.system-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.system-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Brass accent line on cards */
.system-card::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-primary);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .system-card::before { margin-inline: 0; }
}

@media (max-width: 767px) {
  .system-card::before { margin-inline: auto; }
  .system-card-icon { margin-inline: auto; }
}

/* Selling Points Callout */
.selling-points {
  margin-top: var(--space-16);
  padding: var(--space-12) var(--space-8);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}

@media (min-width: 768px) {
  .selling-points { padding: var(--space-16) var(--space-12); }
}

.selling-points-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  text-align: center;
  margin-bottom: var(--space-12);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .selling-points-title { font-size: var(--text-2xl); }
}

.selling-points-grid {
  display: grid;
  gap: var(--space-10);
}

@media (min-width: 768px) {
  .selling-points-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-10) var(--space-12);
  }
}

.selling-point {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.selling-point-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-primary);
}

.selling-point strong {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.selling-point p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}

/* ===== ENVIRONMENT LIBRARY ===== */
.library {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.library-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

@media (min-width: 1024px) {
  .library-header { margin-bottom: var(--space-16); }
}

.library-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .library-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .library-grid { gap: var(--space-8); }
}

.library-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.library-card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  display: block;
}

.library-card-info {
  padding: var(--space-5) var(--space-5) var(--space-6);
}

.library-card-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.library-card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.library-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== MEETING SIMULATION ===== */
.simulation {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  background: var(--color-surface);
}

.simulation-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

@media (min-width: 1024px) {
  .simulation-header { margin-bottom: var(--space-16); }
}

.simulation-image-wrapper {
  max-width: 1100px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-divider);
}

.simulation-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

.simulation-caption {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  font-style: italic;
}

/* ===== HOW IT WORKS ===== */
.process {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.process-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

@media (min-width: 1024px) {
  .process-header { margin-bottom: var(--space-16); }
}

.process-steps {
  display: grid;
  gap: var(--space-10);
  max-width: 800px;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12) var(--space-10);
    max-width: none;
  }
}

.process-step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.step-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--color-primary);
  line-height: 1;
  flex-shrink: 0;
  min-width: 40px;
}

.step-content h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.step-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== CTA / CONTACT ===== */
.contact {
  padding-block: clamp(var(--space-20), 10vw, var(--space-32));
  background: var(--color-text);
  color: var(--color-bg);
}

.contact-inner {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}

.contact .section-label {
  color: var(--color-primary);
}

.contact .section-title {
  color: var(--color-bg);
}

[data-theme="dark"] .contact {
  background: var(--color-surface-2);
}

[data-theme="dark"] .contact .section-title {
  color: var(--color-text);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .contact {
    background: var(--color-surface-2);
  }
  :root:not([data-theme]) .contact .section-title {
    color: var(--color-text);
  }
}

.contact-text {
  font-size: var(--text-base);
  color: var(--color-text-faint);
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

[data-theme="dark"] .contact-text {
  color: var(--color-text-muted);
}

.contact-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-10);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.contact-cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px oklch(0 0 0 / 0.2);
}

.contact-cta:active {
  transform: translateY(0);
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-brand {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-right {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-right a {
  color: var(--color-text-faint);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-interactive);
}

.footer-right a:hover {
  color: var(--color-text-muted);
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}

/* Staggered delays */
.fade-in-d1 { animation-delay: 0ms; }
.fade-in-d2 { animation-delay: 60ms; }
.fade-in-d3 { animation-delay: 120ms; }
.fade-in-d4 { animation-delay: 180ms; }

/* ===== MISC ===== */
.brass-rule {
  width: 48px;
  height: 1px;
  background: var(--color-primary);
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

/* Skip link — visible only on focus */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  text-decoration: none;
  z-index: 200;
  border-radius: var(--radius-sm);
  transition: top 0.2s;
}

.skip-link:focus {
  top: var(--space-4);
}