/* ==========================================================================
   PartaPhoto — design system
   Concept : « la pellicule partagée » — l'appareil jetable des tables de fête,
   version numérique. Palette « heure dorée » : aubergine nuit + corail flash + or.
   ========================================================================== */

/* ---- Polices auto-hébergées (offline-first, aucun CDN) ---- */
@font-face {
  font-family: 'Fraunces';
  src: url('/assets/fonts/fraunces.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: 'Fraunces';
  src: url('/assets/fonts/fraunces-italic.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
  font-style: italic;
}
@font-face {
  font-family: 'InterVar';
  src: url('/assets/fonts/inter.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
}

/* ---- Tokens ---- */
:root {
  --ink:        #221A2E;
  --ink-soft:   #4A3F5C;
  --ink-muted:  #7A7186;
  --cream:      #FBF6F1;
  --cream-2:    #F4ECE3;
  --paper:      #FFFFFF;

  --coral:      #FF4D6D;
  --coral-deep: #E23458;
  --gold:       #F6A93B;
  --plum:       #6B3FA0;
  --violet:     #8B5CF6;

  --accent:      var(--coral);
  --accent-deep: var(--coral-deep);
  --grad: linear-gradient(120deg, #FF6B4A 0%, var(--coral) 42%, var(--plum) 100%);
  --grad-warm: linear-gradient(120deg, var(--gold), var(--coral));

  --line: rgba(34, 26, 46, 0.10);
  --shadow-sm: 0 1px 3px rgba(34,26,46,.08), 0 1px 2px rgba(34,26,46,.06);
  --shadow-md: 0 12px 32px -12px rgba(34,26,46,.30);
  --shadow-lg: 0 28px 64px -24px rgba(34,26,46,.45);

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'InterVar', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  --container: 1120px;
  --pad: clamp(1.1rem, 4vw, 2rem);
}

/* Thèmes d'évènement : on ne change que l'accent + le dégradé. */
[data-theme="ocean"]   { --accent:#1FA6C4; --accent-deep:#127B93; --grad:linear-gradient(120deg,#38BDF8,#1FA6C4 45%,#3B4F9E); }
[data-theme="forest"]  { --accent:#3E9E6C; --accent-deep:#2C7A51; --grad:linear-gradient(120deg,#8BD17C,#3E9E6C 50%,#1F6F5C); }
[data-theme="blossom"] { --accent:#E85C9A; --accent-deep:#C63E7D; --grad:linear-gradient(120deg,#FF9EC4,#E85C9A 50%,#B14Fb0); }
[data-theme="noir"]    { --accent:#C9A227; --accent-deep:#A5831A; --grad:linear-gradient(120deg,#6B6B6B,#2A2A2A 60%,#111); }

/* ---- Reset léger ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
/* scroll-padding-top : compense la barre de navigation collante (sticky, ~68px)
   pour que les ancres du menu ne se calent pas SOUS le menu. */
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, video, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---- Typographie ---- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 560; line-height: 1.08; letter-spacing: -0.01em; }
.display {
  font-family: var(--font-display);
  font-weight: 340;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
}
.display em { font-style: italic; font-weight: 420; color: var(--accent-deep); }
.eyebrow {
  font-family: var(--font-body);
  font-size: .78rem; font-weight: 650;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent-deep);
}
.lead { font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--ink-soft); }
.muted { color: var(--ink-muted); }

/* ---- Layout ---- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--pad); }
.section { padding-block: clamp(3.5rem, 9vw, 7rem); }
.center { text-align: center; }
.stack > * + * { margin-top: 1rem; }

/* ---- Boutons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .85rem 1.5rem; border-radius: 100px;
  font-weight: 600; font-size: 1rem;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  will-change: transform;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: var(--shadow-md); }
.btn-primary:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.6); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
.btn-ghost:hover { background: #fff; }
.btn-dark { background: var(--ink); color: var(--cream); }
.btn-dark:hover { background: #100b17; transform: translateY(-2px); }
.btn-lg { padding: 1.05rem 2rem; font-size: 1.08rem; }
.btn-block { display: flex; width: 100%; justify-content: center; }

/* ---- Header / nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  background: color-mix(in srgb, var(--cream) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-family: var(--font-display); font-weight: 560; font-size: 1.35rem; letter-spacing: -.02em; }
.brand .logo { width: 34px; height: 34px; }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a { font-weight: 500; color: var(--ink-soft); }
.nav-links a:hover { color: var(--ink); }
@media (max-width: 720px) { .nav-links .hide-sm { display: none; } }

/* ---- Hero ---- */
.hero { position: relative; padding-top: clamp(2.5rem, 6vw, 4.5rem); padding-bottom: clamp(3rem, 7vw, 5rem); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero-copy .display { margin-top: 1.1rem; }
.hero-copy .lead { margin-top: 1.4rem; max-width: 34ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.hero-note { margin-top: 1.1rem; font-size: .92rem; color: var(--ink-muted); display: flex; align-items: center; gap: .5rem; }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-copy .lead { margin-inline: auto; }
  .hero-cta, .hero-note { justify-content: center; }
}

/* Ambiance : halos dégradés doux en fond de héro. */
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5; z-index: 0;
}
.hero::before { width: 420px; height: 420px; background: radial-gradient(circle, var(--coral), transparent 70%); top: -120px; right: -80px; }
.hero::after  { width: 360px; height: 360px; background: radial-gradient(circle, var(--gold), transparent 70%); bottom: -140px; left: -100px; }
.hero .container { position: relative; z-index: 1; }

/* ---- Signature : la pile de polaroïds (« pellicule partagée ») ---- */
.polastack { position: relative; height: 420px; perspective: 1200px; }
.pola {
  position: absolute; top: 50%; left: 50%;
  width: min(60%, 260px); aspect-ratio: 4/5;
  background: #fff; border-radius: 8px;
  padding: 12px 12px 44px; box-shadow: var(--shadow-lg);
  transform-origin: center;
  transition: transform .5s cubic-bezier(.2,.8,.2,1);
}
.pola .shot { width: 100%; height: 100%; border-radius: 3px; background-size: cover; background-position: center; }
.pola .cap { position: absolute; bottom: 12px; left: 0; right: 0; text-align: center; font-family: var(--font-display); font-style: italic; color: var(--ink-soft); font-size: .95rem; }
.pola:nth-child(1) { transform: translate(-50%,-50%) rotate(-11deg) translateX(-46px); }
.pola:nth-child(2) { transform: translate(-50%,-50%) rotate(6deg) translateX(38px) translateY(14px); }
.pola:nth-child(3) { transform: translate(-50%,-50%) rotate(-3deg) translateY(-8px); z-index: 3; }
.polastack:hover .pola:nth-child(1) { transform: translate(-50%,-50%) rotate(-15deg) translateX(-80px); }
.polastack:hover .pola:nth-child(2) { transform: translate(-50%,-50%) rotate(10deg) translateX(72px) translateY(6px); }
@media (max-width: 860px) { .polastack { height: 340px; margin-top: 1rem; } }

/* ---- Bande pellicule (séparateur signature) ---- */
.filmstrip { display: flex; gap: 6px; padding: 8px; background: var(--ink); border-radius: var(--r-sm); overflow: hidden; }
.filmstrip::before, .filmstrip::after { content: ""; flex: 0 0 14px; align-self: stretch; background-image: radial-gradient(circle, transparent 34%, var(--ink) 36%); background-size: 14px 18px; }
.filmstrip .frame { flex: 1; aspect-ratio: 1; background: var(--cream-2); border-radius: 3px; background-size: cover; background-position: center; }

/* ---- Cartes / étapes ---- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
@media (max-width: 820px) { .cards { grid-template-columns: 1fr; } }
.card {
  background: var(--paper); border-radius: var(--r-lg);
  padding: 1.8rem; box-shadow: var(--shadow-sm);
  border: 1px solid var(--line); position: relative;
}
.card .step-no { font-family: var(--font-display); font-size: 2.6rem; color: var(--accent); line-height: 1; opacity: .9; }
.card h3 { margin-top: .8rem; font-size: 1.3rem; }
.card p { margin-top: .5rem; color: var(--ink-soft); }
.card .ico { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: var(--grad); color: #fff; margin-bottom: 1rem; }

/* ---- Bandeau modes (cloud / local) ---- */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
@media (max-width: 820px) { .modes { grid-template-columns: 1fr; } }
.mode {
  border-radius: var(--r-lg); padding: 2rem; color: #fff; position: relative; overflow: hidden;
  box-shadow: var(--shadow-md);
}
.mode.cloud { background: var(--grad); }
.mode.local { background: linear-gradient(140deg, #2B2140, var(--ink)); }
.mode h3 { color: #fff; font-size: 1.5rem; }
.mode p { color: rgba(255,255,255,.86); margin-top: .6rem; }
.mode ul { list-style: none; margin-top: 1rem; padding: 0; display: grid; gap: .5rem; }
.mode li { display: flex; gap: .6rem; align-items: flex-start; color: rgba(255,255,255,.9); }
.mode .tag { display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; background: rgba(255,255,255,.2); padding: .3rem .7rem; border-radius: 100px; }

/* ---- FAQ ---- */
.faq details { border-bottom: 1px solid var(--line); padding: 1.1rem 0; }
.faq summary { font-family: var(--font-display); font-size: 1.2rem; font-weight: 500; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.6rem; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq p { margin-top: .7rem; color: var(--ink-soft); }

/* ---- Formulaires ---- */
.field { display: block; margin-bottom: 1rem; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .4rem; }
.field input, .field textarea, .field select {
  width: 100%; padding: .8rem 1rem; border-radius: var(--r-sm);
  border: 1px solid var(--line); background: #fff; transition: border .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); outline: none; }
.field .hint { font-size: .82rem; color: var(--ink-muted); margin-top: .35rem; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px) { .row2 { grid-template-columns: 1fr; } }

/* ---- Panneau / auth ---- */
.panel { background: var(--paper); border-radius: var(--r-lg); box-shadow: var(--shadow-md); border: 1px solid var(--line); padding: clamp(1.4rem, 4vw, 2.4rem); }
.panel-narrow { max-width: 460px; margin-inline: auto; }

/* ---- QR ---- */
.qrbox { display: inline-grid; place-items: center; padding: 18px; background: #fff; border-radius: var(--r-md); box-shadow: var(--shadow-md); }
.qrbox canvas, .qrbox img { width: 220px; height: 220px; image-rendering: pixelated; }
.code-pill { font-family: var(--font-display); font-size: 2rem; letter-spacing: .3em; padding: .4rem 1rem; background: var(--cream-2); border-radius: var(--r-sm); display: inline-block; }

/* ---- Galerie ---- */
.gallery { columns: 4 220px; column-gap: 12px; }
.gallery .tile { break-inside: avoid; margin-bottom: 12px; border-radius: var(--r-sm); overflow: hidden; position: relative; background: var(--cream-2); box-shadow: var(--shadow-sm); cursor: zoom-in; transition: transform .18s; }
.gallery .tile:hover { transform: translateY(-3px); }
.gallery .tile img { width: 100%; display: block; }
.gallery .tile .play { position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-size: 2.4rem; text-shadow: 0 2px 12px rgba(0,0,0,.5); pointer-events: none; }
.gallery .tile .by { position: absolute; left: 0; right: 0; bottom: 0; padding: 1.4rem .6rem .4rem; font-size: .78rem; color: #fff; background: linear-gradient(transparent, rgba(0,0,0,.55)); opacity: 0; transition: opacity .2s; }
.gallery .tile:hover .by { opacity: 1; }

/* ---- Dropzone upload ---- */
.dropzone {
  border: 2px dashed color-mix(in srgb, var(--accent) 50%, var(--line));
  border-radius: var(--r-lg); padding: 2.4rem 1.4rem; text-align: center;
  background: color-mix(in srgb, var(--accent) 5%, #fff); transition: background .2s, border-color .2s;
}
.dropzone.drag { background: color-mix(in srgb, var(--accent) 14%, #fff); border-color: var(--accent); }
.dropzone .big { font-family: var(--font-display); font-size: 1.4rem; }

/* ---- Lightbox ---- */
.lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(15,10,22,.94); display: none; align-items: center; justify-content: center; padding: 2rem; }
.lightbox.open { display: flex; }
.lightbox img, .lightbox video { max-width: 92vw; max-height: 86vh; border-radius: 8px; box-shadow: var(--shadow-lg); }
.lightbox .close, .lightbox .nav-btn { position: absolute; color: #fff; font-size: 2rem; background: rgba(255,255,255,.12); width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; backdrop-filter: blur(6px); }
.lightbox .close { top: 1.2rem; right: 1.2rem; }
.lightbox .prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox .next { right: 1rem; top: 50%; transform: translateY(-50%); }

/* ---- Toast ---- */
.toasts { position: fixed; bottom: 1.2rem; left: 50%; transform: translateX(-50%); z-index: 200; display: grid; gap: .5rem; width: min(92vw, 420px); }
.toast { background: var(--ink); color: #fff; padding: .85rem 1.1rem; border-radius: var(--r-sm); box-shadow: var(--shadow-lg); font-size: .95rem; animation: toastin .25s ease; }
.toast.ok { background: #1f7a4d; }
.toast.err { background: var(--coral-deep); }
@keyframes toastin { from { opacity: 0; transform: translateY(10px); } }

/* ---- Progress ---- */
.progress { height: 8px; border-radius: 100px; background: var(--cream-2); overflow: hidden; }
.progress > i { display: block; height: 100%; width: 0; background: var(--grad); transition: width .2s; }

/* ---- Footer ---- */
.footer { background: var(--ink); color: rgba(255,255,255,.75); padding-block: 3rem; }
.footer a { color: rgba(255,255,255,.85); }
.footer a:hover { color: #fff; }
.footer .brand { color: #fff; }
.foot-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; }

/* ---- Divers ---- */
.badge { display: inline-flex; align-items: center; gap: .4rem; font-size: .8rem; font-weight: 600; padding: .35rem .8rem; border-radius: 100px; background: color-mix(in srgb, var(--accent) 12%, #fff); color: var(--accent-deep); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.6rem,4vw,3rem); align-items: center; }
@media (max-width: 820px) { .grid-2 { grid-template-columns: 1fr; } }
.hr { height: 1px; background: var(--line); border: 0; margin-block: 2rem; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}