/* ============================================================
   NuView Gallery — style.css
   Palette: Gallery black + warm ivory + gold accent
   Fonts: Cormorant Garamond (display) + Work Sans (body)
   ============================================================ */

/* ---------- TYPE SCALE ---------- */
:root {
  --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 ---------- */
:root {
  --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;
}

/* ---------- COLOR: LIGHT ---------- */
:root,
[data-theme='light'] {
  --color-bg:             #F5F3EE;
  --color-surface:        #FAF9F6;
  --color-surface-2:      #FFFFFF;
  --color-surface-offset: #EDE9E2;
  --color-divider:        #D8D3C8;
  --color-border:         #C9C4B8;

  --color-text:           #1A1714;
  --color-text-muted:     #6B6660;
  --color-text-faint:     #B0ABA4;
  --color-text-inverse:   #F5F3EE;

  /* Gold accent */
  --color-primary:        #8B6914;
  --color-primary-hover:  #6E5210;
  --color-primary-active: #4F3B0B;
  --color-primary-highlight: #E8D9B5;

  --color-error:    #9B2B2B;
  --color-success:  #2D6A3F;

  --radius-sm:   0.25rem;
  --radius-md:   0.375rem;
  --radius-lg:   0.5rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px rgba(26,23,20,0.08);
  --shadow-md: 0 4px 16px rgba(26,23,20,0.10);
  --shadow-lg: 0 12px 40px rgba(26,23,20,0.14);

  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Work Sans', 'Helvetica Neue', sans-serif;
}

/* ---------- COLOR: DARK ---------- */
[data-theme='dark'] {
  --color-bg:             #111009;
  --color-surface:        #181610;
  --color-surface-2:      #1E1C15;
  --color-surface-offset: #151310;
  --color-divider:        #28251C;
  --color-border:         #333028;

  --color-text:           #E8E4DA;
  --color-text-muted:     #807A70;
  --color-text-faint:     #504C44;
  --color-text-inverse:   #1A1714;

  --color-primary:        #C9963A;
  --color-primary-hover:  #E0AE52;
  --color-primary-active: #F2C76A;
  --color-primary-highlight: #3A2E14;

  --color-error:    #D16B6B;
  --color-success:  #5A9E72;

  --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:             #111009;
    --color-surface:        #181610;
    --color-surface-2:      #1E1C15;
    --color-surface-offset: #151310;
    --color-divider:        #28251C;
    --color-border:         #333028;
    --color-text:           #E8E4DA;
    --color-text-muted:     #807A70;
    --color-text-faint:     #504C44;
    --color-text-inverse:   #1A1714;
    --color-primary:        #C9963A;
    --color-primary-hover:  #E0AE52;
    --color-primary-active: #F2C76A;
    --color-primary-highlight: #3A2E14;
    --color-error:    #D16B6B;
    --color-success:  #5A9E72;
    --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);
  }
}

/* ============================================================
   GLOBAL COMPONENTS
   ============================================================ */

/* ---------- HEADER ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}

.site-header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo-link {
  text-decoration: none;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.logo-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-name {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.4rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.logo-tagline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-text);
}

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

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  cursor: pointer;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg);
}

.mobile-nav a {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}

.mobile-nav a:hover { color: var(--color-text); }
.mobile-nav.open { display: flex; }

@media (max-width: 768px) {
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
}

/* ---------- FOOTER ---------- */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-16) var(--space-6);
  background: var(--color-surface);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-12);
}

.footer-brand .logo-name {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 28ch;
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-col a:hover { color: var(--color-primary); }

.footer-bottom {
  max-width: var(--content-wide);
  margin: var(--space-12) auto 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border-radius: 0;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 1.5px solid var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid currentColor;
}

.btn-outline:hover {
  border-color: var(--color-text);
  background: var(--color-surface-offset);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-ghost:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- SECTION / LAYOUT ---------- */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  padding-inline: var(--space-6);
}

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

.container--narrow {
  max-width: var(--content-default);
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  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);
  line-height: 1.1;
}

.section-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ---------- DIVIDER ---------- */
.gold-rule {
  width: 48px;
  height: 2px;
  background: var(--color-primary);
  margin-bottom: var(--space-6);
}

/* ---------- ARTWORK CARD ---------- */
.artwork-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.artwork-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.artwork-card__img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  display: block;
  background: var(--color-surface-offset);
}

.artwork-card__body {
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.artwork-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: 1.2;
}

.artwork-card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.artwork-card__price {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: auto;
  padding-top: var(--space-3);
}

.artwork-card__badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px var(--space-2);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

/* ---------- FORM ELEMENTS ---------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0;
  font-size: var(--text-base);
  color: var(--color-text);
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-highlight);
}

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

/* ---------- PAGE HERO (interior) ---------- */
.page-hero {
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
}

.page-hero__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.page-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.page-hero__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ---------- NFT PLATFORM CARD ---------- */
.platform-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition-interactive);
}

.platform-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.platform-card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
}

.platform-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.platform-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-top: auto;
}

/* ---------- TOAST / SUCCESS MSG ---------- */
.toast {
  display: none;
  padding: var(--space-4) var(--space-6);
  background: var(--color-success);
  color: #fff;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  margin-top: var(--space-4);
}

.toast.show { display: block; }