/*
Theme Name: CAUSMA Performance Skincare
Theme URI: https://causma.com
Author: CAUSMA
Author URI: https://causma.com
Description: Luxury Performance Skincare — Complete redesign. Premium editorial aesthetic.
Version: 2.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: Proprietary
Text Domain: causma
Tags: e-commerce, woocommerce, luxury, minimal, one-product
*/

/* ============================================================
   DESIGN TOKENS
   ============================================================ */

:root {
  /* Core palette */
  --c-black:    #0A0A0A;
  --c-ivory:    #F3EFE8;
  --c-copper:   #B87333;
  --c-bronze:   #8C6239;
  --c-white:    #FFFFFF;

  /* Neutrals */
  --c-n100:     #F8F5F0;
  --c-n200:     #EDE8DF;
  --c-n300:     #D4CFC6;
  --c-n500:     #8A8580;
  --c-n700:     #4A4540;
  --c-n800:     #2A2520;
  --c-n900:     #1A1510;

  /* Typography */
  --ff-serif:   'Cormorant Garamond', 'Georgia', serif;
  --ff-head:    'Barlow Condensed', sans-serif;
  --ff-body:    'DM Sans', 'Inter', -apple-system, sans-serif;

  /* Type scale */
  --t-xs:    0.6875rem;
  --t-sm:    0.8125rem;
  --t-base:  1rem;
  --t-md:    1.125rem;
  --t-lg:    1.375rem;
  --t-xl:    1.75rem;
  --t-2xl:   2.25rem;
  --t-3xl:   3rem;
  --t-4xl:   4.5rem;
  --t-5xl:   6rem;
  --t-6xl:   8rem;

  /* Spacing */
  --s2:  0.5rem;
  --s3:  0.75rem;
  --s4:  1rem;
  --s5:  1.25rem;
  --s6:  1.5rem;
  --s8:  2rem;
  --s10: 2.5rem;
  --s12: 3rem;
  --s16: 4rem;
  --s20: 5rem;
  --s24: 6rem;
  --s32: 8rem;
  --s40: 10rem;

  /* Layout */
  --max-w:    1320px;
  --gutter:   2rem;

  /* Motion */
  --ease:     cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io:  cubic-bezier(0.45, 0, 0.55, 1);
  --dur-xs:   0.2s;
  --dur-sm:   0.4s;
  --dur-md:   0.65s;
  --dur-lg:   1s;
}

/* ============================================================
   BASE RESET
   ============================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--ff-body);
  background: var(--c-ivory);
  color: var(--c-black);
  line-height: 1.6;
  overflow-x: hidden;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ============================================================
   GLOBAL UTILITIES
   ============================================================ */

.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-md) var(--ease),
              transform var(--dur-md) var(--ease);
}
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }
.reveal-d4 { transition-delay: 0.32s; }
.reveal-d5 { transition-delay: 0.40s; }

/* Eyebrow label */
.eyebrow {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-copper);
  display: flex;
  align-items: center;
  gap: var(--s4);
}
.eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--c-copper);
  flex-shrink: 0;
}

/* Copper divider */
.copper-line {
  width: 40px;
  height: 1px;
  background: var(--c-copper);
}

/* ============================================================
   SCROLLBAR
   ============================================================ */

::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--c-black); }
::-webkit-scrollbar-thumb { background: rgba(184,115,51,.5); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-copper); }

/* ============================================================
   SELECTION
   ============================================================ */

::selection { background: var(--c-copper); color: var(--c-white); }

/* ============================================================
   FOCUS
   ============================================================ */

:focus-visible { outline: 1.5px solid var(--c-copper); outline-offset: 3px; }

/* ============================================================
   ANNOUNCEMENT BAR
   ============================================================ */

#causma-announcement {
  background: var(--c-black);
  color: rgba(243,239,232,.5);
  text-align: center;
  padding: 10px var(--s4);
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ============================================================
   HEADER
   ============================================================ */

#causma-header {
  position: fixed;
  top: 37px; /* below announcement bar */
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--s6) var(--s8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s8);
  transition: background var(--dur-sm) var(--ease),
              top var(--dur-sm) var(--ease),
              padding var(--dur-sm) var(--ease),
              backdrop-filter var(--dur-sm) var(--ease);
}

#causma-header.scrolled {
  top: 0;
  background: rgba(10,10,10,.94);
  backdrop-filter: blur(24px);
  padding: var(--s4) var(--s8);
  border-bottom: 1px solid rgba(243,239,232,.06);
}

/* Logo */
.causma-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-wordmark {
  font-family: var(--ff-head);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-ivory);
  line-height: 1;
}

.logo-tagline {
  font-family: var(--ff-body);
  font-size: 8px;
  font-weight: 400;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--c-copper);
  line-height: 1;
}

/* Nav */
.causma-nav {
  display: flex;
  align-items: center;
  gap: var(--s8);
}

.causma-nav a {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(243,239,232,.5);
  position: relative;
  transition: color var(--dur-xs);
}
.causma-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-copper);
  transition: width var(--dur-sm) var(--ease);
}
.causma-nav a:hover { color: var(--c-ivory); }
.causma-nav a:hover::after { width: 100%; }

/* Header CTA */
.causma-header-cta {
  display: flex;
  align-items: center;
  gap: var(--s4);
  flex-shrink: 0;
}

.causma-cart-btn {
  font-family: var(--ff-body);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-black);
  background: var(--c-ivory);
  padding: 10px 22px;
  white-space: nowrap;
  transition: background var(--dur-xs), color var(--dur-xs);
}
.causma-cart-btn:hover {
  background: var(--c-copper);
  color: var(--c-white);
}

/* Hamburger */
.causma-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 2px 0;
}
.causma-hamburger span {
  display: block;
  height: 1px;
  background: var(--c-ivory);
  transition: transform var(--dur-sm) var(--ease), opacity var(--dur-xs);
}
.causma-hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.causma-hamburger.open span:nth-child(2) { opacity: 0; }
.causma-hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   MOBILE MENU
   ============================================================ */

#causma-mobile-menu {
  position: fixed;
  top: 0; right: 0;
  width: min(320px, 82vw);
  height: 100%;
  background: var(--c-black);
  z-index: 1500;
  transform: translateX(100%);
  transition: transform var(--dur-md) var(--ease);
  padding: 80px var(--s8) var(--s10);
  border-left: 1px solid rgba(243,239,232,.06);
  display: flex;
  flex-direction: column;
}
#causma-mobile-menu.open { transform: translateX(0); }

.mm-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
}
.mm-link {
  display: block;
  padding: 18px 0;
  font-family: var(--ff-head);
  font-weight: 700;
  font-size: var(--t-2xl);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(243,239,232,.45);
  border-bottom: 1px solid rgba(243,239,232,.05);
  transition: color var(--dur-xs);
}
.mm-link:hover { color: var(--c-ivory); }

.mm-cta {
  margin-top: var(--s8);
  background: var(--c-ivory);
  color: var(--c-black);
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 16px;
  text-align: center;
  width: 100%;
  transition: background var(--dur-xs), color var(--dur-xs);
}
.mm-cta:hover { background: var(--c-copper); color: var(--c-white); }

#causma-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,.7);
  z-index: 1499;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-sm), visibility var(--dur-sm);
  backdrop-filter: blur(4px);
}
#causma-overlay.open { opacity: 1; visibility: visible; }

/* ============================================================
   HERO
   ============================================================ */

#causma-hero {
  position: relative;
  min-height: 100svh;
  background: var(--c-black);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
  overflow: hidden;
  padding-top: 100px;
}

/* Left column — text */
.hero-left {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--s16) var(--s16) var(--s20) var(--s16);
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  margin-bottom: var(--s8);
}

.hero-headline {
  font-family: var(--ff-serif);
  font-size: clamp(4.5rem, 9.5vw, var(--t-6xl));
  font-weight: 300;
  line-height: 0.88;
  letter-spacing: -0.025em;
  color: var(--c-ivory);
  margin-bottom: var(--s10);
}

.hero-headline .copper { color: var(--c-copper); }

.hero-copy {
  font-family: var(--ff-body);
  font-size: var(--t-base);
  font-weight: 300;
  line-height: 1.75;
  color: rgba(243,239,232,.45);
  max-width: 380px;
  margin-bottom: var(--s10);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--s6);
  flex-wrap: wrap;
}

/* Primary CTA */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--s3);
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-black);
  background: var(--c-ivory);
  padding: 14px 32px;
  transition: background var(--dur-xs), color var(--dur-xs);
  white-space: nowrap;
}
.btn-primary:hover { background: var(--c-copper); color: var(--c-white); }
.btn-primary svg { width: 14px; height: 14px; }

/* Ghost link */
.btn-ghost {
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(243,239,232,.35);
  border-bottom: 1px solid rgba(243,239,232,.15);
  padding-bottom: 2px;
  transition: color var(--dur-xs), border-color var(--dur-xs);
}
.btn-ghost:hover { color: var(--c-ivory); border-color: rgba(243,239,232,.5); }

.hero-price-row {
  display: flex;
  align-items: baseline;
  gap: var(--s3);
  margin-top: var(--s6);
}
.hero-price-amount {
  font-family: var(--ff-serif);
  font-size: var(--t-xl);
  font-weight: 300;
  color: var(--c-ivory);
}
.hero-price-note {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: var(--c-n500);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Right column — product visual */
.hero-right {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: var(--s16);
  overflow: hidden;
}

/* Subtle radial glow */
.hero-right::before {
  content: '';
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(184,115,51,.12) 0%, transparent 65%);
  pointer-events: none;
}

/* Vertical decorative line */
.hero-vline {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent 0%, rgba(184,115,51,.15) 40%, rgba(184,115,51,.15) 60%, transparent 100%);
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--s10);
  left: var(--s8);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s3);
}
.hero-scroll-bar {
  width: 1px;
  height: 52px;
  background: linear-gradient(to bottom, transparent, var(--c-copper));
  animation: scrollDrop 2.2s ease-in-out infinite;
}
.hero-scroll-text {
  font-family: var(--ff-body);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(243,239,232,.22);
  writing-mode: vertical-lr;
  transform: rotate(180deg);
}

@keyframes scrollDrop {
  0%, 100% { opacity: .25; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.15); }
}

/* ── CSS PRODUCT TUBE (hero) ── */
.tube-wrap {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.tube-shadow {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 24px;
  background: radial-gradient(ellipse, rgba(184,115,51,.2) 0%, transparent 70%);
  filter: blur(10px);
}

.tube {
  position: relative;
  width: 108px;
  height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: tubeFloat 6s ease-in-out infinite;
}

@keyframes tubeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.tube-cap {
  width: 52px;
  height: 52px;
  background: linear-gradient(175deg, #2A2520 0%, #080604 100%);
  border-radius: 4px 4px 0 0;
  box-shadow: 0 -4px 12px rgba(0,0,0,.5);
  flex-shrink: 0;
}

.tube-neck {
  width: 42px;
  height: 14px;
  background: linear-gradient(90deg, #CFC9BF 0%, #F0EBE1 50%, #E8E2D8 100%);
  flex-shrink: 0;
}

.tube-body {
  width: 98px;
  flex: 1;
  background: linear-gradient(155deg,
    #E6E0D5 0%,
    #F3EDE2 20%,
    #EEE8DD 48%,
    #E5DFD3 75%,
    #E0DAD0 100%);
  border-radius: 0 0 9px 9px;
  position: relative;
  overflow: hidden;
  box-shadow:
    5px 0 22px rgba(0,0,0,.18),
    -2px 0 10px rgba(255,255,255,.25) inset,
    0 -3px 8px rgba(0,0,0,.08);
}

/* Highlights */
.tube-body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 6px;
  width: 6px;
  height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,.25), transparent);
  border-radius: 0 0 0 9px;
}

.tube-stripe-top {
  position: absolute;
  top: 18%;
  left: 0; right: 0;
  height: 1px;
  background: rgba(184,115,51,.45);
}

/* Brand area */
.tube-brand {
  position: absolute;
  top: 22%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  white-space: nowrap;
}

.tube-icon-svg {
  margin: 0 auto 6px;
  opacity: .8;
}

.tube-brand-name {
  display: block;
  font-family: var(--ff-head);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: 0.3em;
  color: #1A1510;
  line-height: 1;
}

.tube-brand-tag {
  display: block;
  font-family: var(--ff-body);
  font-size: 6.5px;
  letter-spacing: 0.14em;
  color: var(--c-copper);
  text-transform: uppercase;
  margin-top: 3px;
}

.tube-product {
  position: absolute;
  top: 48%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  white-space: nowrap;
}

.tube-product span {
  display: block;
  font-family: var(--ff-body);
  font-size: 7.5px;
  letter-spacing: 0.1em;
  color: #2A2520;
  text-transform: uppercase;
  line-height: 1.65;
  font-weight: 500;
}

.tube-stripe-mid {
  position: absolute;
  top: 62%;
  left: 0; right: 0;
  height: 1px;
  background: rgba(0,0,0,.05);
}

.tube-specs {
  position: absolute;
  top: 66%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  white-space: nowrap;
}
.tube-specs span {
  display: block;
  font-family: var(--ff-body);
  font-size: 6.5px;
  letter-spacing: 0.09em;
  color: #5A5550;
  text-transform: uppercase;
  line-height: 1.7;
}

.tube-volume {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--ff-body);
  font-size: 7.5px;
  letter-spacing: 0.12em;
  color: var(--c-n500);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ============================================================
   MANIFESTO
   ============================================================ */

#causma-manifesto {
  background: var(--c-ivory);
  padding: var(--s40) 0 var(--s32);
}

.manifesto-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.manifesto-eyebrow {
  margin-bottom: var(--s8);
}

.manifesto-headline {
  font-family: var(--ff-serif);
  font-size: clamp(2.6rem, 6.5vw, 5.5rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.025em;
  color: var(--c-black);
  margin-bottom: var(--s10);
}

.manifesto-body {
  font-family: var(--ff-body);
  font-size: var(--t-lg);
  font-weight: 300;
  line-height: 1.82;
  color: var(--c-n700);
  max-width: 620px;
  border-top: 1px solid var(--c-n200);
  padding-top: var(--s8);
}

/* ============================================================
   PILLARS
   ============================================================ */

#causma-pillars {
  background: var(--c-black);
  padding: var(--s32) 0;
  overflow: hidden;
}

.pillars-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.pillars-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s16);
  align-items: flex-end;
  padding-bottom: var(--s16);
  border-bottom: 1px solid rgba(243,239,232,.07);
  margin-bottom: var(--s20);
}

.pillars-title {
  font-family: var(--ff-serif);
  font-size: clamp(2.2rem, 4.5vw, 4rem);
  font-weight: 300;
  color: var(--c-ivory);
  line-height: 1;
  letter-spacing: -0.02em;
}

.pillars-sub {
  font-family: var(--ff-body);
  font-size: var(--t-base);
  font-weight: 300;
  color: rgba(243,239,232,.38);
  line-height: 1.75;
  max-width: 420px;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(243,239,232,.06);
}

.pillar {
  background: var(--c-black);
  padding: var(--s12) var(--s10);
  display: flex;
  flex-direction: column;
  gap: var(--s5);
  transition: background var(--dur-sm) var(--ease);
}
.pillar:hover { background: #141414; }

.pillar-num {
  font-family: var(--ff-serif);
  font-size: 4rem;
  font-weight: 300;
  color: rgba(184,115,51,.14);
  line-height: 1;
  user-select: none;
}

.pillar-name {
  font-family: var(--ff-head);
  font-size: var(--t-2xl);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ivory);
  line-height: 1;
}

.pillar-bar {
  width: 28px;
  height: 1px;
  background: var(--c-copper);
}

.pillar-desc {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 300;
  color: rgba(243,239,232,.38);
  line-height: 1.72;
}

/* ============================================================
   PRODUCT SHOWCASE
   ============================================================ */

#causma-product {
  background: var(--c-ivory);
  padding: var(--s32) 0;
}

.product-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s20);
  align-items: center;
}

/* Visual side */
.product-visual {
  position: relative;
  background: var(--c-n200);
  min-height: 580px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-bg-word {
  position: absolute;
  font-family: var(--ff-serif);
  font-size: 18rem;
  font-weight: 300;
  color: rgba(0,0,0,.035);
  letter-spacing: -0.05em;
  user-select: none;
  pointer-events: none;
  white-space: nowrap;
}

.product-visual-tag {
  position: absolute;
  top: var(--s6);
  left: var(--s6);
  font-family: var(--ff-body);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-copper);
}

/* Large tube for product section */
.tube-lg {
  position: relative;
  width: 132px;
  height: 430px;
  display: flex;
  flex-direction: column;
  align-items: center;
  filter: drop-shadow(0 24px 56px rgba(0,0,0,.14));
  z-index: 1;
}
.tube-lg-cap {
  width: 62px;
  height: 60px;
  background: linear-gradient(175deg, #2A2520 0%, #080604 100%);
  border-radius: 5px 5px 0 0;
  flex-shrink: 0;
}
.tube-lg-neck {
  width: 50px;
  height: 16px;
  background: linear-gradient(90deg, #CFC9BF 0%, #F0EBE1 50%, #E8E2D8 100%);
  flex-shrink: 0;
}
.tube-lg-body {
  width: 118px;
  flex: 1;
  background: linear-gradient(155deg,
    #E6E0D5 0%, #F3EDE2 18%, #EEE8DD 50%, #E5DFD3 78%, #E0DAD0 100%);
  border-radius: 0 0 11px 11px;
  position: relative;
  overflow: hidden;
  box-shadow:
    7px 0 28px rgba(0,0,0,.14),
    -3px 0 12px rgba(255,255,255,.28) inset,
    0 -4px 10px rgba(0,0,0,.06);
}
.tube-lg-body::before {
  content: '';
  position: absolute;
  top: 0; left: 7px;
  width: 8px; height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,.22), transparent);
  border-radius: 0 0 0 11px;
}
.tube-lg .tube-stripe-top { top: 17%; }
.tube-lg .tube-brand { top: 21%; }
.tube-lg .tube-brand-name { font-size: 20px; }
.tube-lg .tube-brand-tag { font-size: 7px; }
.tube-lg .tube-product { top: 47%; }
.tube-lg .tube-product span { font-size: 8.5px; line-height: 1.7; }
.tube-lg .tube-stripe-mid { top: 61%; }
.tube-lg .tube-specs { top: 65%; }
.tube-lg .tube-specs span { font-size: 7px; }
.tube-lg .tube-volume { bottom: 14px; font-size: 8px; }

/* Info side */
.product-info {
  display: flex;
  flex-direction: column;
  gap: var(--s8);
}

.product-eyebrow {
  margin-bottom: 0;
}

.product-name {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  line-height: 1;
  color: var(--c-black);
  letter-spacing: -0.02em;
}

.product-subtitle {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-n500);
}

.product-desc {
  font-family: var(--ff-body);
  font-size: var(--t-base);
  font-weight: 300;
  line-height: 1.78;
  color: var(--c-n700);
  border-top: 1px solid var(--c-n200);
  padding-top: var(--s8);
}

.product-feats {
  display: flex;
  flex-direction: column;
  gap: var(--s4);
}

.product-feat {
  display: flex;
  align-items: flex-start;
  gap: var(--s4);
}

.product-feat-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--c-copper);
  margin-top: 3px;
}

.product-feat-text {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  color: var(--c-n700);
  line-height: 1.6;
}

.product-feat-text strong {
  color: var(--c-black);
  font-weight: 500;
}

.product-price-row {
  display: flex;
  align-items: baseline;
  gap: var(--s4);
  padding: var(--s8) 0;
  border-top: 1px solid var(--c-n200);
  border-bottom: 1px solid var(--c-n200);
}

.product-price {
  font-family: var(--ff-serif);
  font-size: var(--t-3xl);
  font-weight: 300;
  color: var(--c-black);
}

.product-price-old {
  font-family: var(--ff-body);
  font-size: var(--t-base);
  color: var(--c-n300);
  text-decoration: line-through;
}

.product-price-save {
  font-family: var(--ff-body);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-white);
  background: var(--c-copper);
  padding: 4px 10px;
}

.product-shipping {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-n500);
  margin-top: var(--s2);
}

.btn-buy {
  width: 100%;
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-ivory);
  background: var(--c-black);
  padding: 18px 24px;
  text-align: center;
  transition: background var(--dur-xs);
  margin-top: var(--s3);
}
.btn-buy:hover { background: var(--c-copper); }

.product-assurance {
  display: flex;
  align-items: center;
  gap: var(--s3);
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: var(--c-n500);
  letter-spacing: 0.06em;
}
.product-assurance svg { color: var(--c-copper); flex-shrink: 0; }

/* ============================================================
   SCIENCE / PROOF
   ============================================================ */

#causma-science {
  background: var(--c-black);
  padding: var(--s32) 0;
}

.science-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.science-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s16);
  align-items: flex-end;
  margin-bottom: var(--s20);
}

.science-title {
  font-family: var(--ff-serif);
  font-size: clamp(2.2rem, 4.5vw, 4rem);
  font-weight: 300;
  color: var(--c-ivory);
  line-height: 1;
  letter-spacing: -0.02em;
}

.science-desc {
  font-family: var(--ff-body);
  font-size: var(--t-base);
  font-weight: 300;
  color: rgba(243,239,232,.38);
  line-height: 1.75;
  max-width: 440px;
}

/* Stats bar */
.science-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(243,239,232,.06);
  margin-bottom: var(--s16);
}

.stat {
  background: var(--c-black);
  padding: var(--s10) var(--s8);
  display: flex;
  flex-direction: column;
  gap: var(--s3);
}

.stat-num {
  font-family: var(--ff-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
  color: var(--c-ivory);
  line-height: 1;
}
.stat-num sup {
  font-size: 55%;
  color: var(--c-copper);
  vertical-align: super;
}

.stat-label {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(243,239,232,.28);
  line-height: 1.5;
}

/* Benefits grid */
.science-benefits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(243,239,232,.06);
}

.benefit {
  background: var(--c-black);
  padding: var(--s8);
  display: flex;
  flex-direction: column;
  gap: var(--s4);
  border: 1px solid rgba(243,239,232,.04);
  transition: border-color var(--dur-sm) var(--ease);
}
.benefit:hover { border-color: rgba(184,115,51,.25); }

.benefit-icon {
  width: 28px;
  height: 28px;
  color: var(--c-copper);
}

.benefit-name {
  font-family: var(--ff-head);
  font-size: var(--t-base);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-ivory);
}

.benefit-desc {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 300;
  color: rgba(243,239,232,.35);
  line-height: 1.65;
}

/* ============================================================
   LIFESTYLE
   ============================================================ */

#causma-lifestyle {
  background: var(--c-ivory);
  padding: var(--s32) 0;
}

.lifestyle-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.lifestyle-head {
  margin-bottom: var(--s16);
}

.lifestyle-title {
  font-family: var(--ff-serif);
  font-size: clamp(2.5rem, 5.5vw, 5.5rem);
  font-weight: 300;
  color: var(--c-black);
  line-height: 0.95;
  letter-spacing: -0.025em;
}

.lifestyle-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s2);
}

.lifestyle-card {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  cursor: default;
  display: flex;
  align-items: flex-end;
}

/* Gradient overlay */
.lifestyle-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,10,.75) 0%, transparent 55%);
  transition: opacity var(--dur-sm) var(--ease);
  z-index: 1;
}

.lc-bg {
  position: absolute;
  inset: 0;
  transition: transform var(--dur-md) var(--ease);
}
.lifestyle-card:hover .lc-bg { transform: scale(1.04); }

/* Background fills per card */
.lc-sport .lc-bg { background: #1A1916; }
.lc-gaming .lc-bg { background: #111215; }
.lc-pro .lc-bg { background: #181714; }
.lc-daily .lc-bg { background: #1E1A16; }

.lc-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -58%);
  opacity: .06;
  z-index: 0;
}

.lc-content {
  position: relative;
  z-index: 2;
  padding: var(--s6);
  transform: translateY(6px);
  transition: transform var(--dur-sm) var(--ease);
}
.lifestyle-card:hover .lc-content { transform: translateY(0); }

.lc-tag {
  font-family: var(--ff-body);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-copper);
  margin-bottom: var(--s2);
}

.lc-name {
  font-family: var(--ff-head);
  font-size: var(--t-xl);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--c-ivory);
  line-height: 1;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */

#causma-testimonials {
  background: var(--c-black);
  padding: var(--s32) 0;
}

.testi-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.testi-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--s16);
  padding-bottom: var(--s8);
  border-bottom: 1px solid rgba(243,239,232,.06);
}

.testi-title {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  color: var(--c-ivory);
  letter-spacing: -0.02em;
}

.testi-meta {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  color: rgba(243,239,232,.25);
  letter-spacing: 0.08em;
}

.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(243,239,232,.04);
}

.testi {
  background: var(--c-black);
  padding: var(--s10) var(--s8);
  display: flex;
  flex-direction: column;
  gap: var(--s5);
  transition: background var(--dur-sm) var(--ease);
}
.testi:hover { background: #111; }

.testi-stars {
  display: flex;
  gap: 3px;
}
.testi-star {
  color: var(--c-copper);
  font-size: 12px;
}

.testi-quote {
  font-family: var(--ff-serif);
  font-size: var(--t-lg);
  font-weight: 300;
  color: var(--c-ivory);
  line-height: 1.5;
  font-style: italic;
  flex: 1;
}

.testi-author {
  padding-top: var(--s5);
  border-top: 1px solid rgba(243,239,232,.06);
}

.testi-name {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--c-ivory);
  letter-spacing: 0.04em;
}

.testi-role {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(243,239,232,.28);
  margin-top: 3px;
}

.testi-verified {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: var(--c-copper);
  letter-spacing: 0.06em;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================================
   FAQ
   ============================================================ */

#causma-faq {
  background: var(--c-ivory);
  padding: var(--s32) 0;
}

.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.faq-head {
  margin-bottom: var(--s16);
}

.faq-title {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  color: var(--c-black);
  letter-spacing: -0.02em;
  margin-top: var(--s6);
}

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

.faq-item { border-bottom: 1px solid var(--c-n200); }
.faq-item:first-child { border-top: 1px solid var(--c-n200); }

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s6);
  padding: var(--s6) 0;
  text-align: left;
  font-family: var(--ff-body);
  font-size: var(--t-base);
  font-weight: 500;
  color: var(--c-black);
  transition: color var(--dur-xs);
  background: none;
  border: none;
  cursor: pointer;
}
.faq-q:hover { color: var(--c-copper); }

.faq-toggle {
  width: 22px;
  height: 22px;
  position: relative;
  flex-shrink: 0;
}
.faq-toggle::before, .faq-toggle::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 12px; height: 1px;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform var(--dur-sm) var(--ease), opacity var(--dur-xs);
}
.faq-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq-item.open .faq-toggle::after {
  transform: translate(-50%, -50%) rotate(0);
  opacity: 0;
}

.faq-a {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--dur-md) var(--ease);
}
.faq-item.open .faq-a { max-height: 360px; }

.faq-a-inner {
  padding: 0 0 var(--s6);
  font-family: var(--ff-body);
  font-size: var(--t-base);
  font-weight: 300;
  color: var(--c-n700);
  line-height: 1.78;
}

/* ============================================================
   FOOTER
   ============================================================ */

#causma-footer {
  background: var(--c-black);
  border-top: 1px solid rgba(243,239,232,.06);
  padding: var(--s20) 0 var(--s12);
}

.footer-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s16);
  padding-bottom: var(--s16);
  border-bottom: 1px solid rgba(243,239,232,.06);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--s6);
}

.footer-logo {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
}

.footer-tagline {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 300;
  color: rgba(243,239,232,.3);
  line-height: 1.72;
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: var(--s3);
  margin-top: var(--s2);
}

.footer-social-link {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(243,239,232,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(243,239,232,.35);
  font-size: 14px;
  transition: border-color var(--dur-xs), color var(--dur-xs);
}
.footer-social-link:hover { border-color: var(--c-copper); color: var(--c-copper); }

.footer-col h4 {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(243,239,232,.35);
  margin-bottom: var(--s6);
}

.footer-col ul { display: flex; flex-direction: column; gap: var(--s3); }

.footer-col a {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 300;
  color: rgba(243,239,232,.28);
  transition: color var(--dur-xs);
  line-height: 1.5;
}
.footer-col a:hover { color: var(--c-ivory); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s8);
  gap: var(--s8);
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: rgba(243,239,232,.18);
  letter-spacing: 0.04em;
}

.footer-trust {
  display: flex;
  gap: var(--s6);
  flex-wrap: wrap;
}

.footer-trust-item {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: rgba(243,239,232,.18);
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: var(--s2);
}

/* ============================================================
   STICKY ATC
   ============================================================ */

#causma-sticky-atc {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 900;
  background: rgba(10,10,10,.96);
  backdrop-filter: blur(20px);
  border-top: 1px solid rgba(243,239,232,.07);
  padding: 14px var(--s6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s4);
  transform: translateY(100%);
  transition: transform var(--dur-sm) var(--ease);
}

#causma-sticky-atc.visible { transform: translateY(0); }

.sticky-info { display: flex; flex-direction: column; gap: 2px; }

.sticky-name {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ivory);
}

.sticky-price {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: rgba(243,239,232,.35);
  letter-spacing: 0.08em;
}

.sticky-btn {
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-black);
  background: var(--c-ivory);
  padding: 12px 28px;
  white-space: nowrap;
  transition: background var(--dur-xs), color var(--dur-xs);
}
.sticky-btn:hover { background: var(--c-copper); color: var(--c-white); }

/* ============================================================
   POPUP
   ============================================================ */

#causma-popup {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10,10,10,.72);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-sm) var(--ease),
              visibility var(--dur-sm);
}
#causma-popup.show { opacity: 1; visibility: visible; }

.popup-box {
  background: var(--c-black);
  border: 1px solid rgba(243,239,232,.07);
  padding: var(--s12) var(--s10);
  max-width: 460px;
  width: 90%;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--dur-sm) var(--ease);
}
#causma-popup.show .popup-box { transform: translateY(0); }

.popup-close {
  position: absolute;
  top: var(--s4); right: var(--s4);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(243,239,232,.28);
  font-size: 18px;
  transition: color var(--dur-xs);
}
.popup-close:hover { color: var(--c-ivory); }

.popup-eyebrow {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-copper);
  margin-bottom: var(--s4);
}

.popup-title {
  font-family: var(--ff-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  color: var(--c-ivory);
  line-height: 1;
  margin-bottom: var(--s4);
}
.popup-title .copper { color: var(--c-copper); }

.popup-desc {
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  font-weight: 300;
  color: rgba(243,239,232,.38);
  line-height: 1.72;
  margin-bottom: var(--s8);
}

.popup-form { display: flex; flex-direction: column; gap: var(--s3); }

.popup-input {
  width: 100%;
  padding: 14px 18px;
  background: rgba(243,239,232,.05);
  border: 1px solid rgba(243,239,232,.1);
  color: var(--c-ivory);
  font-family: var(--ff-body);
  font-size: var(--t-sm);
  outline: none;
  transition: border-color var(--dur-xs);
}
.popup-input::placeholder { color: rgba(243,239,232,.22); }
.popup-input:focus { border-color: var(--c-copper); }

.popup-btn {
  width: 100%;
  padding: 15px;
  background: var(--c-copper);
  color: var(--c-white);
  font-family: var(--ff-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: background var(--dur-xs);
}
.popup-btn:hover { background: var(--c-bronze); }

.popup-skip {
  font-family: var(--ff-body);
  font-size: var(--t-xs);
  color: rgba(243,239,232,.18);
  text-align: center;
  padding: var(--s2);
  transition: color var(--dur-xs);
  letter-spacing: 0.04em;
}
.popup-skip:hover { color: rgba(243,239,232,.45); }

/* ============================================================
   RESPONSIVE — TABLET ≤ 1024px
   ============================================================ */

@media (max-width: 1024px) {
  :root { --gutter: 1.5rem; }

  #causma-hero {
    grid-template-columns: 1fr;
    min-height: 100svh;
  }
  .hero-right { display: none; }
  .hero-left {
    padding: var(--s16) var(--s8) var(--s20);
    justify-content: flex-end;
    min-height: 100svh;
  }
  .hero-headline { font-size: clamp(4rem, 12vw, 7rem); }

  .pillars-top,
  .science-top { grid-template-columns: 1fr; gap: var(--s8); }

  .pillars-grid,
  .science-benefits { grid-template-columns: repeat(2, 1fr); }

  .science-stats { grid-template-columns: repeat(2, 1fr); }

  .product-wrap { grid-template-columns: 1fr; gap: var(--s12); }
  .product-visual { min-height: 400px; }

  .lifestyle-grid { grid-template-columns: repeat(2, 1fr); }

  .testi-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-top { grid-template-columns: 1fr 1fr; gap: var(--s10); }

  .causma-nav { display: none; }
  .causma-hamburger { display: flex; }
}

/* ============================================================
   RESPONSIVE — MOBILE ≤ 640px
   ============================================================ */

@media (max-width: 640px) {
  :root { --gutter: 1.25rem; }

  #causma-header { padding: var(--s4) var(--gutter); }
  #causma-header.scrolled { padding: var(--s3) var(--gutter); }

  #causma-manifesto { padding: var(--s20) 0 var(--s16); }

  #causma-pillars, #causma-product, #causma-science,
  #causma-lifestyle, #causma-testimonials,
  #causma-faq, #causma-footer { padding: var(--s16) 0; }

  .pillars-grid,
  .science-stats,
  .science-benefits { grid-template-columns: 1fr; }

  .lifestyle-grid { grid-template-columns: 1fr 1fr; }
  .lifestyle-card { aspect-ratio: 2/3; }

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

  .footer-top { grid-template-columns: 1fr; gap: var(--s8); }

  .footer-bottom { flex-direction: column; align-items: flex-start; gap: var(--s4); }

  .testi-head { flex-direction: column; align-items: flex-start; gap: var(--s3); }

  #causma-sticky-atc { padding: 12px var(--s4); }
  .sticky-btn { padding: 10px 20px; }
}