/* ============================================
   ELENA ROSE - PAINTER PORTFOLIO
   Global Styles & Design System
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600&display=swap');

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Colors - Neutral Palette */
  --color-white: #ffffff;
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a3a3a3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;

  /* Accent Colors */
  --color-green-600: #16a34a;
  --color-red-500: #ef4444;
  --color-red-600: #dc2626;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width: 80rem;
  --nav-height: 4rem;
  --nav-height-md: 5rem;

  /* Transitions */
  --transition-fast: 200ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-image: 700ms ease;
}

/* ============================================
   CSS Reset & Base Styles
   ============================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-50);
  min-height: 100vh;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

/* ============================================
   Typography Utilities
   ============================================ */
.font-serif {
  font-family: var(--font-serif);
}

.font-sans {
  font-family: var(--font-sans);
}

.tracking-wide {
  letter-spacing: 0.05em;
}

.tracking-wider {
  letter-spacing: 0.1em;
}

.tracking-widest {
  letter-spacing: 0.2em;
}

.tracking-super {
  letter-spacing: 0.3em;
}

.uppercase {
  text-transform: uppercase;
}

.italic {
  font-style: italic;
}

.text-center {
  text-align: center;
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* ============================================
   Navigation Styles
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-neutral-200);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--nav-height);
}

@media (min-width: 768px) {
  .nav__inner {
    height: var(--nav-height-md);
  }
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-style: italic;
  transition: color var(--transition-base);
}

.nav__logo:hover {
  color: var(--color-neutral-600);
}

@media (min-width: 768px) {
  .nav__logo {
    font-size: 1.5rem;
  }
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-neutral-600);
  transition: color var(--transition-base);
  position: relative;
  padding: var(--space-1) 0;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-neutral-900);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-neutral-900);
}

.nav__cart {
  position: relative;
  padding: var(--space-2);
  color: var(--color-neutral-900);
  transition: color var(--transition-base);
}

.nav__cart:hover {
  color: var(--color-neutral-600);
}

.nav__cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--color-neutral-900);
  color: var(--color-white);
  font-size: 0.625rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

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

@media (min-width: 768px) {
  .nav__mobile-actions {
    display: none;
  }
}

.nav__hamburger {
  padding: var(--space-2);
  color: var(--color-neutral-900);
}

.nav__mobile-menu {
  display: none;
  background: var(--color-white);
  border-top: 1px solid var(--color-neutral-200);
  padding: var(--space-4);
}

.nav__mobile-menu.is-open {
  display: block;
}

@media (min-width: 768px) {
  .nav__mobile-menu {
    display: none !important;
  }
}

.nav__mobile-link {
  display: block;
  width: 100%;
  text-align: left;
  padding: var(--space-2) 0;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-neutral-600);
  transition: color var(--transition-base);
}

.nav__mobile-link--active {
  color: var(--color-neutral-900);
  font-weight: 500;
}

/* ============================================
   Main Content Area
   ============================================ */
.main {
  padding-top: var(--nav-height);
}

@media (min-width: 768px) {
  .main {
    padding-top: var(--nav-height-md);
  }
}

/* ============================================
   Button Styles
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  padding: 1rem 2rem;
  background: var(--color-neutral-900);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-neutral-800);
}

@media (min-width: 768px) {
  .btn--primary {
    padding: 1.25rem 2.5rem;
  }
}

.btn--outline {
  padding: 1rem 2rem;
  background: transparent;
  color: var(--color-neutral-900);
  border: 2px solid var(--color-neutral-900);
}

.btn--outline:hover {
  background: var(--color-neutral-900);
  color: var(--color-white);
}

@media (min-width: 768px) {
  .btn--outline {
    padding: 1.25rem 2.5rem;
  }
}

.btn--ghost {
  padding: var(--space-2) 0;
  gap: var(--space-3);
}

.btn--ghost:hover {
  gap: 1.25rem;
}

.btn--white {
  padding: 1rem 2rem;
  background: var(--color-white);
  color: var(--color-neutral-900);
}

.btn--white:hover {
  background: var(--color-neutral-100);
}

@media (min-width: 768px) {
  .btn--white {
    padding: 1.25rem 2.5rem;
  }
}

.btn--full {
  width: 100%;
}

@media (min-width: 640px) {
  .btn--full-sm {
    width: auto;
  }
}

.btn--disabled {
  background: var(--color-neutral-300);
  color: var(--color-neutral-500);
  cursor: not-allowed;
}

.btn--success {
  background: var(--color-green-600);
  color: var(--color-white);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
  padding: var(--space-16) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-24) 0;
  }
}

.section--white {
  background: var(--color-white);
}

.section--light {
  background: var(--color-neutral-50);
}

.section--dark {
  background: var(--color-neutral-900);
  color: var(--color-white);
}

.section__label {
  font-size: 0.625rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-neutral-500);
  margin-bottom: var(--space-3);
}

@media (min-width: 640px) {
  .section__label {
    font-size: 0.75rem;
  }
}

.section__title {
  font-family: var(--font-serif);
  font-size: 1.875rem;
  font-weight: 400;
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .section__title {
    font-size: 2.25rem;
  }
}

@media (min-width: 768px) {
  .section__title {
    font-size: 3rem;
  }
}

.section__subtitle {
  color: var(--color-neutral-600);
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Grid System
   ============================================ */
.grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .grid {
    gap: 2rem;
  }
}

.grid--2 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.grid--3 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid--4 {
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   Card / Artwork Card
   ============================================ */
.artwork-card {
  cursor: pointer;
}

.artwork-card__image-wrap {
  position: relative;
  overflow: hidden;
  background: var(--color-neutral-100);
  aspect-ratio: 3 / 4;
  margin-bottom: var(--space-4);
}

.artwork-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-image);
}

.artwork-card:hover .artwork-card__image {
  transform: scale(1.1);
}

.artwork-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  transition: background var(--transition-base);
}

.artwork-card:hover .artwork-card__overlay {
  background: rgba(0, 0, 0, 0.1);
}

.artwork-card__sold-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--color-white);
  padding: var(--space-1) var(--space-3);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.artwork-card__category {
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-neutral-500);
  margin-bottom: var(--space-2);
}

.artwork-card__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  transition: color var(--transition-base);
}

@media (min-width: 768px) {
  .artwork-card__title {
    font-size: 1.5rem;
  }
}

.artwork-card:hover .artwork-card__title {
  color: var(--color-neutral-600);
}

.artwork-card__meta {
  font-size: 0.875rem;
  color: var(--color-neutral-600);
  margin-top: var(--space-2);
}

.artwork-card__price {
  font-size: 1.125rem;
  font-weight: 500;
  margin-top: var(--space-2);
}

/* ============================================
   Form Styles
   ============================================ */
.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  color: var(--color-neutral-700);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-neutral-300);
  background: var(--color-white);
  transition: border-color var(--transition-base);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-neutral-900);
}

.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-neutral-300);
  background: var(--color-white);
  transition: border-color var(--transition-base);
  outline: none;
  resize: none;
  min-height: 10rem;
}

.form-textarea:focus {
  border-color: var(--color-neutral-900);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================
   Footer Styles
   ============================================ */
.footer {
  background: var(--color-neutral-900);
  color: var(--color-white);
  padding: var(--space-12) 0 var(--space-8);
}

@media (min-width: 768px) {
  .footer {
    padding: var(--space-16) 0 var(--space-8);
  }
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-12);
  }
}

.footer__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: var(--space-4);
}

.footer__heading {
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer__text {
  font-size: 0.875rem;
  color: var(--color-neutral-400);
  line-height: 1.7;
}

.footer__link {
  display: block;
  font-size: 0.875rem;
  color: var(--color-neutral-400);
  padding: var(--space-1) 0;
  transition: color var(--transition-base);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__social-links {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.footer__social-link {
  color: var(--color-white);
  transition: color var(--transition-base);
}

.footer__social-link:hover {
  color: var(--color-neutral-400);
}

.footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-neutral-800);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.875rem;
  color: var(--color-neutral-500);
}

@media (min-width: 640px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}



/* ============================================
   Animation Utilities
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* ============================================
   Filter Buttons
   ============================================ */
.filter-bar {
  position: sticky;
  top: var(--nav-height);
  z-index: 40;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-neutral-200);
  padding: var(--space-4) 0;
}

@media (min-width: 768px) {
  .filter-bar {
    top: var(--nav-height-md);
  }
}

.filter-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.filter-bar__buttons {
  display: none;
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (min-width: 768px) {
  .filter-bar__buttons {
    display: flex;
  }
}

.filter-btn {
  padding: var(--space-2) 1.25rem;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
  transition: all var(--transition-base);
}

.filter-btn:hover {
  background: var(--color-neutral-200);
}

.filter-btn--active {
  background: var(--color-neutral-900);
  color: var(--color-white);
}

.filter-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .filter-toggle {
    display: none;
  }
}

.filter-bar__mobile {
  display: none;
  margin-top: var(--space-4);
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-bar__mobile.is-open {
  display: flex;
}

@media (min-width: 768px) {
  .filter-bar__mobile {
    display: none !important;
  }
}

.filter-count {
  font-size: 0.875rem;
  color: var(--color-neutral-600);
}

/* ============================================
   SVG Icons (inline)
   ============================================ */
.icon {
  display: inline-block;
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
}

.icon--sm {
  width: 0.875rem;
  height: 0.875rem;
}

.icon--md {
  width: 1.25rem;
  height: 1.25rem;
}

.icon--lg {
  width: 1.375rem;
  height: 1.375rem;
}

.icon--xl {
  width: 2rem;
  height: 2rem;
}

.icon--xxl {
  width: 4rem;
  height: 4rem;
}

/* ============================================
   Responsive visibility
   ============================================ */
.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: block;
  }
}

.hide-desktop {
  display: block;
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none;
  }
}