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

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

h1, h2, h3, h4, h5, h6 { font-size: 100%; }
a { text-decoration: none; }
img { border: none; font-style: italic; }
ul { list-style: none; }

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

:root {
  --kodak-yellow: #FDB924;
  --film-black: #1A1A1A;
  --film-white: #F5F5F0;
  --holga-gray: #4A4A4A;
  --green-film: #4A8B3C;
  --vignette: rgba(0, 0, 0, 0.3);

  --font-mono: 'Courier Prime', monospace;
  --font-display: 'Oswald', sans-serif;
  --font-typewriter: 'Special Elite', cursive;
}

/*
 * === BASE STYLES ===
 */

html {
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--film-black);
  color: var(--film-white);
  font-family: var(--font-mono);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Pebbled texture background like Holga grip */
body::before {
  background-image:
    radial-gradient(circle at 20% 50%, transparent 0%, transparent 2px, var(--film-black) 2px),
    radial-gradient(circle at 80% 20%, transparent 0%, transparent 1.5px, var(--film-black) 1.5px),
    radial-gradient(circle at 40% 80%, transparent 0%, transparent 1.8px, var(--film-black) 1.8px);
  background-position: 0 0, 4px 6px, 2px 3px;
  background-size: 8px 8px, 12px 12px, 10px 10px;
  content: '';
  inset-block-end: 0;
  inset-block-start: 0;
  inset-inline-end: 0;
  inset-inline-start: 0;
  opacity: 0.4;
  pointer-events: none;
  position: fixed;
  z-index: 0;
}

/* Film grain overlay */
body::after {
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='2.5' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  content: '';
  inset-block-end: 0;
  inset-block-start: 0;
  inset-inline-end: 0;
  inset-inline-start: 0;
  opacity: 0.08;
  pointer-events: none;
  position: fixed;
  z-index: 1;
}

a:link,
a:visited {
  color: var(--kodak-yellow);
  transition: all 0.3s;
}

a:hover {
  color: var(--film-white);
  text-shadow: 0 0 10px var(--kodak-yellow);
}

.container {
  margin: 0 auto;
  max-inline-size: 1400px;
  padding: 60px 40px;
  position: relative;
  z-index: 2;
}

/*
 * === FILM STRIP DECORATION ===
 */

.film-strip-top {
  align-items: center;
  background: var(--kodak-yellow);
  block-size: 30px;
  display: flex;
  inset-block-start: 0;
  inset-inline-end: 0;
  inset-inline-start: 0;
  overflow: hidden;
  position: absolute;
  z-index: 10;
}

.film-strip-top::before {
  background: var(--film-black);
  block-size: 2px;
  content: '';
  inset-block-start: 50%;
  inset-inline-end: 0;
  inset-inline-start: 0;
  position: absolute;
}

.film-strip-top::after {
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 10px,
    var(--film-black) 10px,
    var(--film-black) 12px
  );
  block-size: 100%;
  content: '';
  inset-inline-end: 0;
  inset-inline-start: 0;
  position: absolute;
}

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

.header {
  animation: fadeInDown 1s cubic-bezier(0.16, 1, 0.3, 1);
  margin-block-end: 80px;
  text-align: center;
}

.camera-badge {
  background: var(--kodak-yellow);
  border: 2px solid var(--film-black);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
  color: var(--film-black);
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-block-end: 20px;
  padding: 6px 20px;
  text-transform: uppercase;
}

.header__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-block-end: 15px;
  position: relative;
  text-shadow: 3px 3px 0 rgba(253, 185, 36, 0.3);
  text-transform: uppercase;
}

.lens-marking {
  color: var(--kodak-yellow);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.lens-marking::before,
.lens-marking::after {
  content: '—';
  margin: 0 15px;
  opacity: 0.5;
}

/* LEGACY: Keep for backwards compatibility */
.banner {
  margin-block-end: 80px;
  text-align: center;
}

.banner__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 700;
  text-transform: uppercase;
}

.banner__instructions {
  color: rgba(245, 245, 240, 0.8);
  font-size: 0.875rem;
  line-height: 1.8;
}

/* CRITICAL: Preserve error class */
.banner--error {
  color: var(--kodak-yellow);
}

/*
 * === CONTENT GRID ===
 */

.content-wrapper {
  animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
  display: grid;
  gap: 60px;
  grid-template-columns: 300px 1fr;
}

/*
 * === FILM CANISTER SIDEBAR ===
 */

.sidebar {
  block-size: fit-content;
  inset-block-start: 60px;
  position: sticky;
}

.film-canister {
  background: linear-gradient(135deg, #2A2A2A 0%, #1A1A1A 100%);
  border: 3px solid var(--holga-gray);
  border-radius: 8px;
  box-shadow:
    inset 0 2px 10px rgba(0, 0, 0, 0.5),
    0 8px 20px rgba(0, 0, 0, 0.4);
  margin-block-end: 30px;
  overflow: hidden;
  padding: 30px 25px;
  position: relative;
}

.film-canister::before {
  background: var(--kodak-yellow);
  block-size: 40px;
  border-block-end: 2px solid var(--film-black);
  content: '';
  inset-block-start: 0;
  inset-inline-end: 0;
  inset-inline-start: 0;
  position: absolute;
}

.film-canister__heading {
  color: var(--kodak-yellow);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-block-end: 15px;
  margin-block-start: 50px;
  text-transform: uppercase;
}

/* CRITICAL: #instructions used by Heading component */
.film-canister__text,
#instructions {
  color: rgba(245, 245, 240, 0.8);
  font-size: 0.875rem;
  line-height: 1.8;
}

.film-specs {
  background: rgba(253, 185, 36, 0.1);
  border-inline-start: 3px solid var(--kodak-yellow);
  margin-block-start: 30px;
  padding: 20px;
}

.film-specs__heading {
  color: var(--kodak-yellow);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  margin-block-end: 12px;
  text-transform: uppercase;
}

.film-specs__list {
  font-size: 0.8rem;
}

.film-specs__list li {
  color: rgba(245, 245, 240, 0.7);
  margin-block-end: 6px;
}

.film-specs__list li::before {
  color: var(--kodak-yellow);
  content: '▸ ';
  margin-inline-end: 8px;
}

/*
 * === CANVAS AREA ===
 */

.canvas-section {
  position: relative;
}

/* Upload button container */
.upload-btn-container {
  margin-block-end: 20px;
  text-align: center;
}

/* Upload button styling - vintage Holga aesthetic */
.upload-btn {
  background: linear-gradient(135deg, #3A3A3A 0%, #2A2A2A 100%);
  border: 3px solid var(--holga-gray);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  color: var(--film-white);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 15px 30px;
  text-transform: uppercase;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.upload-btn:hover:not([disabled]) {
  border-color: var(--kodak-yellow);
  box-shadow: 0 0 20px rgba(253, 185, 36, 0.3);
  transform: translateY(-2px);
}

.upload-btn:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.viewfinder-frame {
  background: #fff;
  box-shadow:
    0 0 0 8px #2A2A2A,
    0 0 0 12px var(--holga-gray),
    0 20px 60px rgba(0, 0, 0, 0.6);
  padding: 20px;
  position: relative;
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.viewfinder-frame:has(.canvas--hover) {
  box-shadow:
    0 0 0 8px var(--kodak-yellow),
    0 0 0 12px var(--kodak-yellow),
    0 20px 60px rgba(253, 185, 36, 0.4),
    0 0 40px rgba(253, 185, 36, 0.6);
}

.format-label {
  background: var(--film-black);
  border: 2px solid var(--kodak-yellow);
  color: var(--kodak-yellow);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  inset-block-start: -15px;
  inset-inline-start: 50%;
  letter-spacing: 0.2em;
  padding: 5px 20px;
  position: absolute;
  text-transform: uppercase;
  transform: translateX(-50%);
  white-space: nowrap;
  z-index: 10;
}

.canvas-wrapper {
  background: white;
  overflow: hidden;
  position: relative;
}

/* Holga vignette overlay */
.canvas-wrapper::after {
  background: radial-gradient(ellipse at center, transparent 40%, var(--vignette) 100%);
  content: '';
  inset-block-end: 0;
  inset-block-start: 0;
  inset-inline-end: 0;
  inset-inline-start: 0;
  opacity: 0.6;
  pointer-events: none;
  position: absolute;
}

/* CRITICAL: #canvas-container used by PhotoCanvas */
.canvas-container {
  background-color: white;
  display: block;
  min-block-size: 400px;
  position: relative;
}

canvas {
  block-size: auto;
  display: block;
  inline-size: 100%;
}

/* CRITICAL: .canvas--hover applied by PhotoCanvas */
.canvas--hover {
  background: white !important;
}

.canvas--hover::before {
  color: var(--kodak-yellow);
  content: 'DROP FILM HERE';
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  letter-spacing: 0.2em;
  position: absolute;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  transform: translate(-50%, -50%);
  z-index: 10;
}

/*
 * === BUTTONS ===
 */

.btn-container {
  display: grid;
  gap: 15px;
  grid-template-columns: repeat(6, 1fr);
  margin-block-start: 30px;
}

/* Row 1: Each filter button spans 2 columns */
.btn-canvas-action:nth-child(1) {  /* B&W Filter */
  grid-column: 1 / span 2;
}

.btn-canvas-action:nth-child(2) {  /* Color Filter */
  grid-column: 3 / span 2;
}

.btn-canvas-action:nth-child(3) {  /* Remove Filter */
  grid-column: 5 / span 2;
}

/* Row 2: Each button spans 3 columns for equal width */
.btn-canvas-action--save {
  grid-column: 1 / span 3;
  grid-row: 2;
}

.btn-canvas-action:nth-child(5) {  /* Clear Canvas */
  grid-column: 4 / span 3;
  grid-row: 2;
}

/* CRITICAL: .btn-canvas-action class used by Buttons component */
.btn-canvas-action {
  background: linear-gradient(135deg, #3A3A3A 0%, #2A2A2A 100%);
  border: 3px solid var(--holga-gray);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  color: var(--film-white);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  overflow: hidden;
  padding: 18px 20px;
  position: relative;
  text-transform: uppercase;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-canvas-action::before {
  background: var(--kodak-yellow);
  block-size: 0;
  border-radius: 50%;
  content: '';
  inline-size: 0;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  position: absolute;
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s;
}

.btn-canvas-action:hover:not([disabled])::before {
  block-size: 300px;
  inline-size: 300px;
}

.btn-canvas-action:hover:not([disabled]) {
  border-color: var(--kodak-yellow);
  box-shadow: 0 6px 20px rgba(253, 185, 36, 0.4);
  color: var(--film-black);
  transform: translateY(-2px);
}

.btn-canvas-action span {
  position: relative;
  z-index: 1;
}

.btn-canvas-action:active:not([disabled]) {
  transform: translateY(0);
}

/* Save button styling */
.btn-canvas-action--save {
  background: linear-gradient(135deg, var(--kodak-yellow) 0%, #E5A51C 100%);
  border-color: var(--kodak-yellow);
  color: var(--film-black);
}

.btn-canvas-action--save::before {
  background: var(--film-white);
}

/* CRITICAL: .btn-canvas-action--active applied by PhotoCanvas */
/* Active state for filter buttons uses border highlight, not yellow background */
.btn-canvas-action--active {
  border-color: var(--kodak-yellow);
  border-width: 4px;
  box-shadow: 0 0 0 2px var(--kodak-yellow), 0 6px 20px rgba(253, 185, 36, 0.3);
}

.btn-canvas-action--active:hover:not([disabled]) {
  transform: translateY(-2px);
}

/* Disabled state */
.btn-canvas-action[disabled],
.btn-canvas-action[disabled]:hover {
  background: #2A2A2A;
  border-color: #333;
  box-shadow: none;
  color: rgba(245, 245, 240, 0.3);
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.btn-canvas-action[disabled]::before {
  display: none;
}

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

.footer {
  align-items: center;
  animation: fadeIn 1s cubic-bezier(0.16, 1, 0.3, 1) 0.8s backwards;
  border-block-start: 3px dashed var(--holga-gray);
  color: rgba(245, 245, 240, 0.6);
  display: flex;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  justify-content: space-between;
  margin-block-start: 100px;
  padding: 40px 0 30px;
}

.footer a {
  color: var(--kodak-yellow);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/*
 * === ANIMATIONS ===
 */

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/*
 * === RESPONSIVE ===
 */

@media (max-width: 968px) {
  .content-wrapper {
    gap: 40px;
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

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

@media (max-width: 640px) {
  .container {
    padding: 40px 20px;
  }

  .btn-container {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }

  .viewfinder-frame {
    padding: 12px;
  }
}