/* ============================================================
   Dalbit Skin Lab — styles
   Nature-forward, sleek-modern K-beauty wholesale brand
   Palette: warm ivory surfaces, botanical forest-green accent,
   moonlit sage neutrals, charcoal text.
   ============================================================ */

:root,
[data-theme='light'] {
  /* Fonts */
  --font-display: 'Zodiak', 'Cormorant', Georgia, serif;
  --font-body: 'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;

  /* Surfaces — warm ivory & sand */
  --color-bg: #f4f1ea;
  --color-surface: #faf8f3;
  --color-surface-2: #fbfaf6;
  --color-surface-offset: #ece7db;
  --color-surface-offset-2: #e3ddcd;
  --color-divider: #ddd6c6;
  --color-border: #cfc7b4;

  /* Text */
  --color-text: #23241f;
  --color-text-muted: #63675c;
  --color-text-faint: #a39f92;
  --color-text-inverse: #f7f5ef;

  /* Primary — botanical forest green */
  --color-primary: #3c5a40;
  --color-primary-hover: #2c4530;
  --color-primary-active: #213326;
  --color-primary-soft: #e2ead9;
  --color-primary-highlight: #d2dfc6;

  /* Secondary accent — moonlit sage */
  --color-sage: #7c8c6b;
  --color-clay: #b08968;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.3vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.25rem, 1.05rem + 0.75vw, 1.6rem);
  --text-xl: clamp(1.75rem, 1.3rem + 1.6vw, 2.6rem);
  --text-2xl: clamp(2.25rem, 1.4rem + 3.4vw, 4rem);
  --text-3xl: clamp(2.75rem, 1rem + 6vw, 5.5rem);

  /* 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;

  /* Radius */
  --radius-sm: 0.375rem; --radius-md: 0.625rem; --radius-lg: 1rem;
  --radius-xl: 1.5rem; --radius-full: 9999px;

  --transition: 220ms cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 80 / 0.06);
  --shadow-md: 0 8px 24px oklch(0.2 0.02 80 / 0.09);
  --shadow-lg: 0 24px 60px oklch(0.2 0.03 80 / 0.16);

  --content-default: 1120px;
  --content-wide: 1280px;
}

[data-theme='dark'] {
  --color-bg: #161814;
  --color-surface: #1c1f1a;
  --color-surface-2: #20231d;
  --color-surface-offset: #1f221c;
  --color-surface-offset-2: #262a22;
  --color-divider: #2a2d25;
  --color-border: #383c33;

  --color-text: #e4e3da;
  --color-text-muted: #9a9c8e;
  --color-text-faint: #6a6c60;
  --color-text-inverse: #1a1c17;

  --color-primary: #9fbf8f;
  --color-primary-hover: #b3cda4;
  --color-primary-active: #c3d9b6;
  --color-primary-soft: #243023;
  --color-primary-highlight: #2a3629;

  --color-sage: #97a884;
  --color-clay: #c89a78;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.25);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 24px 60px oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #161814;
    --color-surface: #1c1f1a;
    --color-surface-2: #20231d;
    --color-surface-offset: #1f221c;
    --color-surface-offset-2: #262a22;
    --color-divider: #2a2d25;
    --color-border: #383c33;
    --color-text: #e4e3da;
    --color-text-muted: #9a9c8e;
    --color-text-faint: #6a6c60;
    --color-text-inverse: #1a1c17;
    --color-primary: #9fbf8f;
    --color-primary-hover: #b3cda4;
    --color-primary-active: #c3d9b6;
    --color-primary-soft: #243023;
    --color-primary-highlight: #2a3629;
    --color-sage: #97a884;
    --color-clay: #c89a78;
  }
}

/* ----- Base reset ----- */
*, *::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-20);
}
body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.12; font-weight: 500; }
p, li { text-wrap: pretty; max-width: 68ch; }

::selection { background: oklch(from var(--color-primary) l c h / 0.28); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--color-primary); color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm);
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

@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-5), 5vw, var(--space-16)); }
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }

.eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-sage);
  margin-bottom: var(--space-4);
}
.section__head { max-width: 60ch; margin-bottom: clamp(var(--space-12), 5vw, var(--space-20)); }
.section__title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 500; letter-spacing: -0.01em; }
.section__title em { font-style: italic; color: var(--color-primary); }
.section__lede { margin-top: var(--space-5); color: var(--color-text-muted); font-size: var(--text-base); max-width: 56ch; }

.link-arrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  margin-top: var(--space-6); font-size: var(--text-sm); font-weight: 500;
  color: var(--color-primary); border-bottom: 1px solid currentColor; padding-bottom: 2px;
}
.link-arrow::after { content: '→'; transition: transform var(--transition); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ----- Buttons ----- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 500; letter-spacing: 0.01em;
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-full);
  transition: all var(--transition); white-space: nowrap;
}
.btn--sm { padding: var(--space-2) var(--space-4); }
.btn--block { width: 100%; }
.btn--primary { background: var(--color-primary); color: var(--color-text-inverse); }
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-full);
  color: var(--color-text-muted); transition: all var(--transition);
}
.icon-btn:hover { color: var(--color-text); background: var(--color-surface-offset); }

/* ----- Header ----- */
.header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.header.is-scrolled { border-bottom-color: var(--color-divider); box-shadow: var(--shadow-sm); }
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); height: 72px; }

.brand { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--color-text); }
.brand__mark { width: 34px; height: 34px; color: var(--color-primary); flex-shrink: 0; }
.brand__name { font-family: var(--font-display); font-size: 1.2rem; font-weight: 500; letter-spacing: -0.01em; line-height: 1; }
.brand__sub { font-family: var(--font-body); font-size: 0.65rem; letter-spacing: 0.28em; text-transform: uppercase; color: var(--color-text-muted); display: block; margin-top: 3px; }

.nav { display: flex; gap: clamp(var(--space-4), 2.5vw, var(--space-8)); }
.nav__link { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 400; transition: color var(--transition); position: relative; }
.nav__link::after { content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 1.5px; background: var(--color-primary); transition: width var(--transition); }
.nav__link:hover { color: var(--color-text); }
.nav__link:hover::after { width: 100%; }

.header__actions { display: flex; align-items: center; gap: var(--space-2); }

@media (max-width: 860px) {
  .nav { display: none; }
  .header__actions .btn--sm { display: none; }
}

/* ----- Hero ----- */
.hero { position: relative; min-height: 92vh; display: flex; align-items: flex-end; overflow: hidden; }
.hero__media { position: absolute; inset: 0; z-index: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero__media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(in oklab,
    color-mix(in oklab, var(--color-bg) 30%, transparent) 0%,
    color-mix(in oklab, var(--color-bg) 88%, transparent) 62%,
    var(--color-bg) 100%);
}
.hero__content { position: relative; z-index: 1; padding-block: var(--space-20); padding-top: var(--space-32); max-width: 760px; }
.hero__title {
  font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 500;
  line-height: 1.02; letter-spacing: -0.02em; margin-bottom: var(--space-6);
}
.hero__title em { font-style: italic; color: var(--color-primary); }
.hero__lede { font-size: var(--text-base); color: var(--color-text-muted); max-width: 52ch; margin-bottom: var(--space-8); }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-12); }
@media (max-width: 480px) { .hero__cta { flex-direction: column; } .hero__cta .btn { width: 100%; } }
.hero__stats { display: flex; flex-wrap: wrap; gap: clamp(var(--space-6), 5vw, var(--space-12)); }
.hero__stats li { display: flex; flex-direction: column; gap: 2px; }
.stat__num { font-family: var(--font-display); font-size: var(--text-lg); color: var(--color-primary); font-weight: 500; }
.stat__label { font-size: var(--text-xs); color: var(--color-text-muted); letter-spacing: 0.04em; }

/* ----- Trust strip (fixed brand green, readable in both modes) ----- */
.truststrip { background: #2c4530; color: #f1ede2; }
.truststrip__row { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: var(--space-4) var(--space-6); padding-block: var(--space-5); }
.truststrip__item { font-size: var(--text-sm); font-weight: 400; letter-spacing: 0.02em; opacity: 0.92; }
.dot { width: 5px; height: 5px; border-radius: var(--radius-full); background: currentColor; opacity: 0.4; }
@media (max-width: 720px) { .dot { display: none; } .truststrip__row { flex-direction: column; gap: var(--space-2); } }

/* ----- Story ----- */
.story__grid { display: grid; grid-template-columns: 1fr 0.85fr; gap: clamp(var(--space-10), 6vw, var(--space-20)); align-items: center; }
.story__text p { margin-top: var(--space-4); color: var(--color-text-muted); }
.story__text em { font-style: italic; color: var(--color-primary); }
.story__media { border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); }
.story__media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/5; }
@media (max-width: 860px) { .story__grid { grid-template-columns: 1fr; } .story__media { order: -1; } }

/* ----- Collection cards ----- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg); padding: clamp(var(--space-6), 3vw, var(--space-8));
  display: flex; flex-direction: column; gap: var(--space-3); transition: all var(--transition);
  position: relative; overflow: hidden;
}
.card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: var(--color-primary); transform: scaleX(0); transform-origin: left; transition: transform var(--transition); }
.card:hover { border-color: var(--color-border); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card:hover::before { transform: scaleX(1); }
.card__index { font-family: var(--font-display); font-size: var(--text-sm); color: var(--color-sage); letter-spacing: 0.1em; }
.card__title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 500; }
.card__text { color: var(--color-text-muted); font-size: var(--text-sm); flex-grow: 1; }
.card__tag { font-size: var(--text-xs); color: var(--color-primary); background: var(--color-primary-soft); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); align-self: flex-start; }
@media (max-width: 900px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }

/* ----- Benefits ----- */
.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.benefit { padding: var(--space-2) 0; }
.benefit__icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; color: var(--color-primary); background: var(--color-primary-soft); border-radius: var(--radius-md); margin-bottom: var(--space-4); }
.benefit__icon svg { width: 24px; height: 24px; }
.benefit__title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 500; margin-bottom: var(--space-2); }
.benefit p { color: var(--color-text-muted); font-size: var(--text-sm); }
@media (max-width: 900px) { .benefits { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .benefits { grid-template-columns: 1fr; } }

/* ----- Process steps ----- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(var(--space-6), 4vw, var(--space-12)); counter-reset: step; }
.step { position: relative; padding-top: var(--space-12); border-top: 1px solid var(--color-divider); }
.step::before { content: ''; position: absolute; top: -1px; left: 0; width: 32%; height: 1px; background: var(--color-primary); }
.step__num { position: absolute; top: 0; left: 0; font-family: var(--font-display); font-size: var(--text-lg); color: var(--color-primary); font-weight: 500; }
.step__title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 500; margin-bottom: var(--space-3); }
.step p { color: var(--color-text-muted); font-size: var(--text-sm); }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* ----- Divider ----- */
.divider { position: relative; min-height: 56vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.divider img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.divider__overlay { position: relative; z-index: 1; width: 100%; background: linear-gradient(in oklab, rgba(0,0,0,0.35), rgba(0,0,0,0.25), rgba(0,0,0,0.45)); min-height: 56vh; display: flex; align-items: center; justify-content: center; padding: var(--space-20); }
.divider blockquote { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400; font-style: italic; color: #f6f4ef; text-align: center; max-width: 18ch; line-height: 1.18; text-wrap: balance; }

/* ----- Inquiry form ----- */
.inquiry__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(var(--space-10), 6vw, var(--space-20)); align-items: start; }
.inquiry__meta { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-8); }
.inquiry__meta li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-4); position: relative; }
.inquiry__meta li::before { content: '✦'; position: absolute; left: 0; color: var(--color-primary); font-size: 0.7rem; top: 4px; }

.form { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-xl); padding: clamp(var(--space-6), 4vw, var(--space-10)); display: flex; flex-direction: column; gap: var(--space-5); box-shadow: var(--shadow-sm); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field__label { font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text-muted); font-weight: 500; }
.field input, .field textarea {
  background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4); font-size: var(--text-base); color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition); width: 100%; resize: vertical;
}
.field input::placeholder, .field textarea::placeholder { color: var(--color-text-faint); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-soft); }
.form__note { font-size: var(--text-sm); color: var(--color-primary); min-height: 1.2em; text-align: center; }
@media (max-width: 860px) { .inquiry__grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .form__row { grid-template-columns: 1fr; } }

/* ----- Footer ----- */
.footer { background: var(--color-surface); border-top: 1px solid var(--color-divider); padding-top: clamp(var(--space-12), 6vw, var(--space-24)); }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: var(--space-10); padding-bottom: var(--space-16); }
.brand--footer .brand__name { font-size: 1.3rem; }
.footer__tag { margin-top: var(--space-4); color: var(--color-text-muted); font-size: var(--text-sm); max-width: 34ch; }
.footer__nav h4, .footer__contact h4 { font-size: var(--text-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-text-muted); margin-bottom: var(--space-4); font-weight: 500; }
.footer__nav a { display: block; font-size: var(--text-sm); color: var(--color-text); padding-block: var(--space-2); transition: color var(--transition); }
.footer__nav a:hover { color: var(--color-primary); }
.footer__contact p { font-size: var(--text-sm); color: var(--color-text-muted); padding-block: var(--space-1); }
.footer__base { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); padding-block: var(--space-8); border-top: 1px solid var(--color-divider); font-size: var(--text-xs); color: var(--color-text-muted); }
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); } }
@media (max-width: 460px) { .footer__grid { grid-template-columns: 1fr; } }

/* ----- Reveal animation (progressive enhancement) -----
   Content is visible by default; only hidden when JS is active so the
   page never appears empty if scripts fail. */
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.is-visible { opacity: 1; transform: none; }