/* ==========================================================================
   Silveto Design V1 — Design system
   Tokens, typography, spacing, grid, components primitives.
   Visual direction: premium editorial / architectural minimalism / quiet luxury
   ========================================================================== */

:root {
  /* Color — warm ivory, ink, restrained bronze */
  --color-ivory: #f3efe8;
  --color-cream: #ebe4d8;
  --color-ink: #1a1916;
  --color-muted: #7a7368;
  --color-bronze: #8d6b45;
  --color-gold: #c4a077;
  --color-charcoal: #181816;
  --color-paper-process: #f8f7f3;
  --color-muted-on-dark: #a0a0a0;
  --color-dark: #151411;
  --color-line: rgba(26, 25, 22, 0.12);

  --color-bg: var(--color-ivory);
  --color-bg-elevated: #f7f4ee;
  --color-bg-warm: var(--color-cream);
  --color-bg-deep: var(--color-dark);
  --color-paper: #faf8f4;
  --color-ink-soft: #3c3832;
  --color-faint: #b3ab9f;
  --color-line-strong: rgba(26, 25, 22, 0.28);
  --color-bronze-soft: #c4a077;
  --color-inverse: var(--color-ivory);
  --color-focus: var(--color-bronze);

  /* Typography */
  --font-serif: "Cormorant Garamond", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --font-sans: "Manrope", "Segoe UI", system-ui, sans-serif;

  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;

  --text-xs: 0.6875rem;   /* 11 */
  --text-sm: 0.8125rem;   /* 13 */
  --text-base: 1rem;      /* 16 */
  --text-md: 1.0625rem;   /* 17 */
  --text-lg: 1.25rem;     /* 20 */
  --text-xl: 1.5rem;      /* 24 */
  --text-2xl: clamp(1.75rem, 2.5vw, 2.625rem);   /* project titles ~28–42 */
  --text-3xl: clamp(2.375rem, 3.5vw, 3.625rem);  /* H2 ~38–58 */
  --text-4xl: clamp(2.5rem, 4vw, 4rem);
  --text-hero: clamp(3.25rem, 5vw, 5.125rem);    /* 52–82 */

  --leading-none: 1;
  --leading-tight: 1.18;
  --leading-snug: 1.32;
  --leading-body: 1.7;
  --leading-loose: 1.85;

  --tracking-tight: -0.02em;
  --tracking-display: -0.025em;
  --tracking-wide: 0.14em;
  --tracking-wider: 0.22em;
  --tracking-widest: 0.32em;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --space-11: 10rem;

  --shell-pad: clamp(1.25rem, 4.2vw, 4.5rem);
  --section-y: clamp(4rem, 8vw, 7.5rem);
  --header-h: 5.25rem;
  --content-max: 78rem;
  --content-narrow: 42rem;
  --measure: 38rem;

  /* Grid */
  --gutter: clamp(1rem, 2.2vw, 1.75rem);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0.05, 0.36, 1);
  --duration-fast: 220ms;
  --duration: 480ms;
  --duration-slow: 800ms;
  --duration-slower: 1400ms;

  /* Elevation — almost none */
  --shadow-soft: 0 18px 50px rgba(22, 21, 19, 0.08);

  /* Z-index */
  --z-base: 1;
  --z-header: 50;
  --z-overlay: 60;
  --z-nav: 61;

  /* Bootstrap overrides used as layout only */
  --bs-gutter-x: var(--gutter);
  --bs-gutter-y: 0;
  --bs-body-font-family: var(--font-sans);
  --bs-body-color: var(--color-ink);
  --bs-body-bg: var(--color-bg);
  --bs-border-color: var(--color-line);
  --bs-link-color: var(--color-ink);
  --bs-link-hover-color: var(--color-ink);
  --bs-primary: var(--color-ink);
}

/* -------------------------------------------------------------------------- */
/* Base
/* -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow-x: clip;
}

body {
  font-family: var(--font-sans);
  font-weight: var(--font-regular);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

img {
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font-family: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
p,
blockquote,
figure {
  margin: 0;
}

address {
  font-style: normal;
}

::selection {
  background: var(--color-ink);
  color: var(--color-inverse);
}

:focus-visible {
  outline: 1px solid var(--color-focus);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: var(--shell-pad);
  top: -4rem;
  z-index: 100;
  background: var(--color-ink);
  color: var(--color-inverse);
  padding: 0.6rem 1rem;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.skip-link:focus {
  top: 0.75rem;
}

/* -------------------------------------------------------------------------- */
/* Typography
/* -------------------------------------------------------------------------- */

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-bronze);
  line-height: var(--leading-none);
}

.eyebrow--light {
  color: var(--color-bronze-soft);
}

.display {
  font-family: var(--font-serif);
  font-weight: var(--font-regular);
  font-size: var(--text-hero);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
}

.heading-lg {
  font-family: var(--font-serif);
  font-weight: var(--font-regular);
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.heading-lg--light {
  color: var(--color-inverse);
}

.heading-md {
  font-family: var(--font-sans);
  font-weight: var(--font-medium);
  font-size: var(--text-md);
  line-height: var(--leading-snug);
}

.statement {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  font-weight: var(--font-regular);
  font-style: italic;
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  max-width: 22ch;
}

.lede {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 1.8vw, 1.5rem);
  font-weight: var(--font-regular);
  line-height: var(--leading-snug);
  color: var(--color-ink-soft);
  max-width: 28ch;
}

.body-lg {
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.body {
  font-size: 0.9375rem;
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.meta {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-muted);
}

/* -------------------------------------------------------------------------- */
/* Layout primitives
/* -------------------------------------------------------------------------- */

.shell {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.shell--wide {
  max-width: 92rem;
}

.shell--narrow {
  max-width: calc(var(--content-narrow) + var(--shell-pad) * 2);
}

.section {
  padding-block: var(--section-y);
}

.section--tight {
  padding-block: clamp(3rem, 7vw, 6rem);
}

.rule {
  border: 0;
  border-top: 1px solid var(--color-line);
  margin: 0;
}

/* Bootstrap grid as foundation — visual chrome is custom */
.row {
  --bs-gutter-x: var(--gutter);
}

/* -------------------------------------------------------------------------- */
/* Interactive primitives
/* -------------------------------------------------------------------------- */

.link-underline {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-ink);
}

.link-underline::after {
  content: "";
  width: 2.25rem;
  height: 1px;
  background: currentColor;
  transform-origin: left center;
  transition: width var(--duration) var(--ease-out);
}

.link-underline:hover::after {
  width: 3.25rem;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-ink);
}

.link-arrow::after {
  content: "→";
  font-size: 0.85em;
  transition: transform var(--duration) var(--ease-out);
}

.link-arrow:hover::after {
  transform: translateX(0.28rem);
}

.link-arrow--light {
  color: var(--color-inverse);
}

.link-arrow--bronze {
  color: var(--color-bronze);
}

.btn-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.85rem 1.75rem;
  border: 1px solid var(--color-ink);
  background: transparent;
  color: var(--color-ink);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  transition:
    background var(--duration) var(--ease-out),
    color var(--duration) var(--ease-out);
}

.btn-line:hover {
  background: var(--color-ink);
  color: var(--color-inverse);
}

.btn-line--inverse {
  border-color: var(--color-inverse);
  color: var(--color-inverse);
}

.btn-line--inverse:hover {
  background: var(--color-inverse);
  color: var(--color-ink);
}

/* Neutralize Bootstrap buttons if they appear */
.btn {
  border-radius: 0;
}

/* -------------------------------------------------------------------------- */
/* Media
/* -------------------------------------------------------------------------- */

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-warm);
}

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

/* Reusable image shapes — form lives on the wrapper, not the photo.
   Swapping img src never changes the silhouette. */
.media-shape {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-warm);
}

.media-shape img {
  width: 100%;
  height: 100%;
  max-width: none;
  display: block;
  object-fit: cover;
}

.media-shape--a {
  border-radius: 88px 22px 96px 26px / 72px 26px 84px 32px;
}

.media-shape--b {
  border-radius: 26px 100px 30px 78px / 26px 68px 34px 86px;
}

.media-shape--c {
  border-radius: 28px 28px 92px 22px / 28px 28px 78px 28px;
}

.media-shape--d {
  border-radius: 72px 34px 28px 88px / 64px 34px 28px 76px;
}