/* ============================================
   PERSEUS VENTURES — Design Tokens & Styles
   Art Direction: Corporate, authoritative, navy + brass
   Inspired by Glencore / Vitol / Trafigura
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@400;500;600;700&family=DM+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* 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);

  /* Spacing */
  --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;

  /* Fonts */
  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;

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

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

/* ===== LIGHT MODE (DEFAULT) ===== */
:root, [data-theme="light"] {
  --color-bg:           #F5F4F0;
  --color-surface:      #FFFFFF;
  --color-surface-alt:  #EDE9E3;
  --color-border:       #D1CDC6;
  --color-text:         #1A1D2B;
  --color-text-muted:   #5A5E6B;
  --color-text-faint:   #9A9DA8;
  --color-text-inverse: #F5F4F0;
  --color-primary:      #0F2B4C;
  --color-primary-hover:#1A3D66;
  --color-accent:       #B8944F;
  --color-accent-hover: #9A7B3F;
  --shadow-sm: 0 1px 3px rgba(15,43,76,0.06);
  --shadow-md: 0 4px 16px rgba(15,43,76,0.08);
  --shadow-lg: 0 12px 40px rgba(15,43,76,0.12);
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --color-bg:           #0C1220;
  --color-surface:      #121A2A;
  --color-surface-alt:  #1A2438;
  --color-border:       #2A3448;
  --color-text:         #D4D6DC;
  --color-text-muted:   #8A8E9A;
  --color-text-faint:   #5A5E6B;
  --color-text-inverse: #0C1220;
  --color-primary:      #6B9AC4;
  --color-primary-hover:#8AB4DA;
  --color-accent:       #D4AE6A;
  --color-accent-hover: #E0C080;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:           #0C1220;
    --color-surface:      #121A2A;
    --color-surface-alt:  #1A2438;
    --color-border:       #2A3448;
    --color-text:         #D4D6DC;
    --color-text-muted:   #8A8E9A;
    --color-text-faint:   #5A5E6B;
    --color-text-inverse: #0C1220;
    --color-primary:      #6B9AC4;
    --color-primary-hover:#8AB4DA;
    --color-accent:       #D4AE6A;
    --color-accent-hover: #E0C080;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  }
}

/* ===== HEADER / NAV ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-4) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.header--scrolled {
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: #fff;
  transition: color 0.4s var(--ease-out);
}

.header--scrolled .header__logo {
  color: var(--color-text);
}

.header__logo img {
  height: 44px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: filter 0.4s var(--ease-out);
}

.header--scrolled .header__logo img {
  filter: none;
}

[data-theme="dark"] .header--scrolled .header__logo img {
  filter: brightness(0) invert(1);
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header__logo-text span {
  display: block;
  font-weight: 400;
  font-size: 0.8em;
  letter-spacing: 0.15em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.header__nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

.header--scrolled .header__nav a {
  color: var(--color-text-muted);
}

.header__nav a:hover {
  color: #fff;
}

.header--scrolled .header__nav a:hover {
  color: var(--color-text);
}

.header__theme-toggle {
  color: rgba(255,255,255,0.85);
  padding: var(--space-2);
  border-radius: 50%;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.header--scrolled .header__theme-toggle {
  color: var(--color-text-muted);
}

.header__theme-toggle:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.header--scrolled .header__theme-toggle:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

/* Mobile nav toggle */
.header__menu-toggle {
  display: none;
  color: rgba(255,255,255,0.85);
  padding: var(--space-2);
}

.header--scrolled .header__menu-toggle {
  color: var(--color-text-muted);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10, 18, 32, 0.85) 0%,
    rgba(10, 18, 32, 0.4) 40%,
    rgba(10, 18, 32, 0.2) 100%
  );
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-32) var(--space-8) var(--space-16);
  width: 100%;
}

.hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  color: #fff;
  line-height: 1.1;
  max-width: 14ch;
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  max-width: 52ch;
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  background: var(--color-accent);
  color: #0F2B4C;
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}

.hero__cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

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

.hero__cta svg {
  width: 18px;
  height: 18px;
}

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

.section__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-bottom: var(--space-10);
}

.section--dark {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.section--dark .section__title {
  color: #fff;
}

.section--dark .section__subtitle {
  color: rgba(255,255,255,0.7);
}

/* ===== ABOUT / PURPOSE ===== */
.purpose {
  background: var(--color-surface);
}

.purpose__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.purpose__text {
  max-width: 520px;
}

.purpose__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.purpose__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.stat {
  text-align: left;
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.2;
}

.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-top: var(--space-1);
}

.purpose__image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.purpose__image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* ===== COMMODITIES GRID ===== */
.commodities__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.commodity-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  aspect-ratio: 4/3;
  cursor: default;
}

.commodity-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.commodity-card:hover img {
  transform: scale(1.04);
}

.commodity-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,18,32,0.82) 0%, rgba(10,18,32,0.1) 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
}

.commodity-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-2);
}

.commodity-card__desc {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

/* ===== TOKENIZATION ===== */
.tokenization {
  position: relative;
  overflow: hidden;
}

.tokenization__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.tokenization__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.tokenization .section__inner {
  position: relative;
  z-index: 1;
}

.tokenization__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-10);
}

.feature {
  padding: var(--space-8);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}

.feature:hover {
  border-color: rgba(184,148,79,0.3);
  background: rgba(255,255,255,0.08);
}

.feature__icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

[data-theme="dark"] .feature__icon {
  color: var(--color-accent);
}

.feature__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-3);
}

.feature__desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
}

/* ===== PRIVATE EQUITY ===== */
.equity__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.equity__image {
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.equity__image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.equity__text {
  max-width: 520px;
}

.equity__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.equity__sectors {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.equity__tag {
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
}

/* ===== CONTACT ===== */
.contact {
  background: var(--color-surface);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact__info h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.contact__detail {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact__detail-icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 3px;
}

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

.contact__detail-text strong {
  display: block;
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.contact__form input,
.contact__form textarea,
.contact__form select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition-interactive);
}

.contact__form input:focus,
.contact__form textarea:focus,
.contact__form select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.contact__form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact__form button[type="submit"] {
  align-self: flex-start;
  padding: var(--space-3) var(--space-8);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}

.contact__form button[type="submit"]:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-primary);
  padding: var(--space-12) var(--space-8) var(--space-6);
}

[data-theme="dark"] .footer {
  background: #080D18;
}

.footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: var(--space-6);
}

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

.footer__brand img {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer__nav {
  display: flex;
  gap: var(--space-8);
}

.footer__nav a {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

.footer__nav a:hover {
  color: #fff;
}

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

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

.footer__pplx {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

.footer__pplx a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__pplx a:hover {
  color: rgba(255,255,255,0.8);
}

/* ===== 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 80%;
  }
}

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

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 900px) {
  .header__nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-8);
    z-index: 200;
  }

  .header__nav.is-open {
    display: flex;
  }

  .header__nav.is-open a {
    color: var(--color-text);
    font-size: var(--text-lg);
  }

  .header__menu-toggle {
    display: block;
    z-index: 250;
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .purpose__grid,
  .equity__layout,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .commodities__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .tokenization__features {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

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

  .purpose__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .footer__top {
    flex-direction: column;
    gap: var(--space-6);
  }

  .footer__nav {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  .header {
    padding: var(--space-3) var(--space-4);
  }

  .section {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .hero__content {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

@media (max-width: 600px) {
  .commodities__grid {
    grid-template-columns: 1fr;
  }

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

/* ===== MOBILE NAV CLOSE BUTTON ===== */
.nav-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  color: var(--color-text);
  padding: var(--space-2);
  display: none;
}

.header__nav.is-open .nav-close {
  display: block;
}