/* ============================================================
   DELANTO PTE. LTD. — delanto.io
   Design: Dark-primary, luxury investor aesthetic
   Accent: Electric gold / amber
   Fonts: Instrument Serif (display) + Switzer (body)
   ============================================================ */

/* ── DESIGN TOKENS ─────────────────────────────────────────── */
: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);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 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;

  /* Layout */
  --content-narrow:  680px;
  --content-default: 1040px;
  --content-wide:    1240px;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;

  /* Transitions */
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts */
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body:    'Switzer', 'Inter', 'Helvetica Neue', sans-serif;
}

/* ── DARK MODE (default) ───────────────────────────────────── */
:root,
[data-theme="dark"] {
  --color-bg:              #0d0d0c;
  --color-surface:         #111110;
  --color-surface-2:       #161614;
  --color-surface-offset:  #1a1a18;
  --color-border:          #272624;
  --color-divider:         #1e1d1b;

  --color-text:            #e8e6e1;
  --color-text-muted:      #8a8884;
  --color-text-faint:      #4a4946;
  --color-text-inverse:    #0d0d0c;

  /* Accent: electric gold */
  --color-accent:          #4a9edd;
  --color-accent-hover:    #6ab4ed;
  --color-accent-soft:     rgba(74, 158, 221, 0.12);
  --color-accent-glow:     rgba(74, 158, 221, 0.08);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.6);
}

/* ── LIGHT MODE ────────────────────────────────────────────── */
[data-theme="light"] {
  --color-bg:              #faf9f6;
  --color-surface:         #f5f4f0;
  --color-surface-2:       #ffffff;
  --color-surface-offset:  #eeece7;
  --color-border:          #dddbd5;
  --color-divider:         #e6e4df;

  --color-text:            #1a1916;
  --color-text-muted:      #6b6967;
  --color-text-faint:      #b0aea9;
  --color-text-inverse:    #faf9f6;

  --color-accent:          #1a6db5;
  --color-accent-hover:    #1558a0;
  --color-accent-soft:     rgba(26, 109, 181, 0.10);
  --color-accent-glow:     rgba(26, 109, 181, 0.06);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.10);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:              #faf9f6;
    --color-surface:         #f5f4f0;
    --color-surface-2:       #ffffff;
    --color-surface-offset:  #eeece7;
    --color-border:          #dddbd5;
    --color-divider:         #e6e4df;
    --color-text:            #1a1916;
    --color-text-muted:      #6b6967;
    --color-text-faint:      #b0aea9;
    --color-text-inverse:    #faf9f6;
    --color-accent:          #1a6db5;
    --color-accent-hover:    #1558a0;
    --color-accent-soft:     rgba(26, 109, 181, 0.10);
    --color-accent-glow:     rgba(26, 109, 181, 0.06);
    --shadow-sm:  0 1px 3px rgba(0,0,0,0.06);
    --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg:  0 16px 48px rgba(0,0,0,0.10);
  }
}

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

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

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

h1, h2, h3, h4 {
  text-wrap: balance;
  line-height: 1.12;
}

p, li { text-wrap: pretty; max-width: 68ch; }

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

button {
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── LAYOUT ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}

.container-narrow {
  max-width: var(--content-narrow);
}

/* ── HEADER ────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--space-5);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.header.scrolled {
  background: color-mix(in srgb, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--color-border);
  padding-block: var(--space-4);
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  transition: opacity var(--transition);
}
.logo:hover { opacity: 0.8; }

.logo-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.logo-mark-sm {
  width: 22px;
  height: 22px;
}

.logo-wordmark {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1;
}

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

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.nav-link:hover { color: var(--color-text); }

.nav-cta {
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full, 9999px);
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}
.nav-cta:hover {
  color: var(--color-text-inverse);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ── HERO ──────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--space-32) var(--space-6) var(--space-20);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Subtle grid lines */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--color-border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* Ambient glow blobs */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}

.hero-glow-1 {
  width: 600px;
  height: 600px;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(74, 158, 221, 0.10) 0%, transparent 70%);
}

.hero-glow-2 {
  width: 400px;
  height: 400px;
  bottom: 10%;
  right: 10%;
  background: radial-gradient(circle, rgba(100, 140, 200, 0.06) 0%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: 9999px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse 2.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero-heading {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  letter-spacing: -0.01em;
}

.hero-heading em {
  font-style: italic;
  color: var(--color-accent);
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-12);
  max-width: 60ch;
  margin-inline: auto;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── BUTTONS ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: var(--space-4) var(--space-8);
  border-radius: 9999px;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(74, 158, 221, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
  transform: translateY(-1px);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  margin: 0 auto;
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60%  { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ── SECTIONS ──────────────────────────────────────────────── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-10);
  letter-spacing: -0.01em;
}

.section-heading.centered {
  text-align: center;
  margin-inline: auto;
}

/* ── ABOUT ─────────────────────────────────────────────────── */
.about {
  border-top: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-10), 5vw, var(--space-20));
  align-items: start;
  margin-bottom: var(--space-16);
}

.about-left .section-heading {
  margin-bottom: 0;
}

.about-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.body-large {
  font-size: var(--text-lg);
  color: var(--color-text);
  line-height: 1.6;
}

.about-right p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Stats */
.stats-row {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  padding-top: var(--space-12);
  border-top: 1px solid var(--color-border);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-num {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--color-border);
  flex-shrink: 0;
}

/* ── APPROACH ──────────────────────────────────────────────── */
.approach {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-4);
}

.pillar {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.pillar:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), 0 0 32px var(--color-accent-glow);
}

.pillar-icon {
  width: 44px;
  height: 44px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.pillar-icon svg {
  width: 100%;
  height: 100%;
}

.pillar-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.pillar-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 100%;
}

/* ── MISSION BAND ──────────────────────────────────────────── */
.mission-band {
  padding-block: clamp(var(--space-20), 10vw, var(--space-32));
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.mission-band::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-accent), transparent);
}

.mission-band::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-accent), transparent);
}

.mission-quote {
  text-align: center;
  max-width: 800px;
  margin-inline: auto;
}

.mission-quote p {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: italic;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.4;
  max-width: 100%;
}

/* ── CONTACT ───────────────────────────────────────────────── */
.contact-sub {
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
  max-width: 52ch;
  margin-inline: auto;
}

.contact-sub.centered { text-align: center; }

.contact-card {
  display: flex;
  justify-content: center;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  padding: var(--space-5) var(--space-10);
  border-radius: var(--radius-xl);
  transition: all var(--transition);
  background: var(--color-surface);
}

.contact-email:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ── FOOTER ────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10) var(--space-12);
  background: var(--color-surface);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
}

.footer-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  letter-spacing: 0.01em;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-sep { color: var(--color-border); }

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

/* ── RESPONSIVE ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .pillars {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

  .stats-row {
    gap: var(--space-8);
  }
}

@media (max-width: 640px) {
  .nav {
    gap: var(--space-4);
  }

  .nav-link:not(.nav-cta) {
    display: none;
  }

  .hero-sub .br-desktop {
    display: none;
  }

  .stats-row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
  }

  .stat-divider { display: none; }

  .mission-quote p {
    font-size: var(--text-xl);
  }

  .footer-meta {
    flex-direction: column;
    gap: var(--space-2);
  }
  .footer-sep { display: none; }
}

/* ── SCROLL REVEAL (JS class) ──────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

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

.footer-email-link {
  color: var(--color-accent);
  transition: opacity var(--transition);
}
.footer-email-link:hover { opacity: 0.75; }