/* Connexion et inscription : formulaire à gauche, visuel en carrousel à droite. Charte Skillesia (bleu, violet, Poppins, Inter). */
:root {
  --primary: #203A7C;
  --secondary: #493781;
  --accent: #80348A;
  --light-accent: #BDA5C8;
  --dark: #22202B;
  --bg: #FFFFFF;
  --bg-soft: #F8F9FC;
  --text: #22202B;
  --text-body: #4B5563;
  --text-muted: #6B7280;
  --text-faint: #9CA3AF;
  --border: #E5E7EB;
  --danger: #B42318;
  --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { max-width: 100%; overflow-x: clip; }
body { background: var(--bg); color: var(--text); font: 400 16px/1.55 var(--font-body); -webkit-font-smoothing: antialiased; min-height: 100vh; min-height: 100dvh; }
a { color: var(--primary); }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 6px; }

.auth-page { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr); min-height: 100vh; min-height: 100dvh; }

/* ——— Formulaire ——— */
.form-side { display: flex; flex-direction: column; padding: 28px clamp(24px, 6vw, 88px) 24px; min-width: 0; }
.form-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.form-header .logo { display: inline-flex; flex: none; }
.logo-img { height: 36px; width: auto; }
.header-right { display: flex; align-items: center; gap: 12px; }
.back-home { white-space: nowrap; font: 500 14px/1 var(--font-body); color: var(--text-muted); text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.back-home:hover { color: var(--text); background: var(--bg-soft); }
.form-container { width: 100%; max-width: 400px; margin: auto; padding: 36px 0; }
.form-title { font: 600 clamp(30px, 3.6vw, 38px)/1.12 var(--font-display); letter-spacing: -0.03em; color: var(--text); }
.form-subtitle { margin-top: 12px; font-size: 16px; color: var(--text-muted); }
.form-subtitle a, .form-footer a, .field-meta a { font-weight: 600; text-decoration: none; }
.form-subtitle a:hover, .form-footer a:hover, .field-meta a:hover { text-decoration: underline; }

#auth-form { margin-top: 32px; display: grid; gap: 18px; }
.field label { display: block; margin: 0 0 7px; font: 600 14px/1.2 var(--font-body); color: var(--text); }
.field input[type="text"], .field input[type="email"], .field input[type="password"] { width: 100%; height: 50px; padding: 0 16px; border-radius: 12px; border: 1px solid var(--border); background: #fff; font: 400 16px var(--font-body); color: var(--text); transition: border-color .2s, box-shadow .2s; }
.field input::placeholder { color: var(--text-faint); }
.field input:hover { border-color: #cfd3da; }
.field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(32, 58, 124, .12); }
.password-wrap { position: relative; }
.password-wrap input { padding-right: 92px !important; }
.toggle-pw { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font: 600 13px/1 var(--font-body); color: var(--primary); padding: 8px 10px; border-radius: 8px; }
.toggle-pw:hover { background: rgba(32, 58, 124, .08); }
.field-meta { margin-top: 10px; text-align: right; font-size: 14px; }
.pw-strength { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; margin-top: 10px; }
.pw-strength .bar { height: 4px; border-radius: 2px; background: #e8eaee; transition: background .25s; }
.pw-strength.weak .bar:nth-child(-n+1) { background: var(--danger); }
.pw-strength.fair .bar:nth-child(-n+2) { background: #d97706; }
.pw-strength.good .bar:nth-child(-n+3) { background: var(--secondary); }
.pw-strength.strong .bar { background: #2f9e5f; }
.pw-strength-label { margin-top: 8px; font-size: 13px; color: var(--text-muted); }

.checkbox-wrap { display: flex; align-items: flex-start; gap: 12px; font-size: 14.5px; line-height: 1.5; color: var(--text-body); cursor: pointer; }
.checkbox-wrap input { position: absolute; opacity: 0; pointer-events: none; }
.checkbox-wrap .box { flex: none; width: 20px; height: 20px; margin-top: 1px; border-radius: 6px; border: 1.5px solid #b8bdc7; background: #fff; display: grid; place-items: center; transition: all .15s; }
.checkbox-wrap input:checked + .box { background: var(--primary); border-color: var(--primary); }
.checkbox-wrap input:checked + .box::after { content: ""; width: 5px; height: 10px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg) translate(-1px, -1px); }
.checkbox-wrap input:focus-visible + .box { box-shadow: 0 0 0 3px rgba(32, 58, 124, .25); }

.submit-btn { height: 52px; border-radius: 12px; background: var(--primary); color: #fff; font: 600 16px var(--font-body); box-shadow: 0 8px 20px rgba(32, 58, 124, .22); transition: background .2s, transform .2s var(--ease-out); margin-top: 4px; }
.submit-btn:hover:not(:disabled) { background: #172b5e; transform: translateY(-1px); }
.submit-btn:disabled { opacity: .75; cursor: default; }
.submit-btn .arrow { margin-left: 6px; }
.form-footer { margin-top: 26px; font-size: 15px; color: var(--text-muted); text-align: center; }
.form-legal { text-align: center; font-size: 13px; color: var(--text-faint); }

body.signup-mode .signin-only { display: none !important; }
body:not(.signup-mode) .signup-only { display: none !important; }

@media (prefers-reduced-motion: no-preference) {
  .form-container > * { animation: rise .5s var(--ease-out) both; }
  .form-container > *:nth-child(2) { animation-delay: .04s; }
  .form-container > *:nth-child(3) { animation-delay: .08s; }
  .form-container > *:nth-child(4) { animation-delay: .12s; }
  @keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
}

/* ——— Visuel en carrousel ——— */
.visual-side { padding: 16px 16px 16px 0; min-width: 0; }
.slides { position: sticky; top: 16px; height: calc(100vh - 32px); height: calc(100dvh - 32px); border-radius: 28px; overflow: hidden; background: var(--dark); isolation: isolate; }
.slide { position: absolute; inset: 0; opacity: 0; transition: opacity .9s ease; }
.slide.active { opacity: 1; z-index: 1; }
.slide img { width: 100%; height: 100%; object-fit: cover; display: block; }
.slide::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(22, 36, 82, .94) 0%, rgba(32, 58, 124, .55) 32%, rgba(32, 58, 124, 0) 62%); pointer-events: none; }
.slide-copy { position: absolute; left: clamp(24px, 4vw, 48px); right: clamp(96px, 11vw, 140px); bottom: clamp(34px, 4.4vw, 58px); z-index: 2; color: #fff; max-width: 520px; }
.slide-copy h2 { font: 600 clamp(26px, 2.8vw, 38px)/1.14 var(--font-display); letter-spacing: -0.025em; color: #fff; }
.slide-copy p { margin-top: 12px; font-size: 17px; line-height: 1.55; color: rgba(255, 255, 255, .86); }
.visual-top { position: absolute; top: 22px; left: 24px; right: 24px; z-index: 3; display: flex; justify-content: space-between; align-items: center; pointer-events: none; }
.visual-meta { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; background: rgba(255, 255, 255, .2); border: 1px solid rgba(255, 255, 255, .3); color: #fff; font: 500 13px/1 var(--font-body); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.visual-meta[hidden] { display: none; }
.visual-meta .pulse-wrap { width: 8px; height: 8px; border-radius: 50%; background: #4ade80; }
.slide-controls { position: absolute; right: clamp(20px, 3vw, 40px); bottom: clamp(24px, 3.4vw, 44px); z-index: 3; display: flex; gap: 10px; }
.slide-btn { width: 46px; height: 46px; border-radius: 50%; border: 1.5px solid rgba(255, 255, 255, .7); color: #fff; display: grid; place-items: center; transition: background .2s, border-color .2s; }
.slide-btn:hover { background: rgba(255, 255, 255, .18); border-color: #fff; }
.slide-btn svg { width: 20px; height: 20px; }
.slide-dots { position: absolute; left: clamp(24px, 4vw, 48px); bottom: clamp(10px, 1.6vw, 20px); z-index: 3; display: flex; gap: 8px; }
.slide-dot { width: 26px; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, .35); position: relative; overflow: hidden; }
.slide-dot.active::after { content: ""; position: absolute; inset: 0; background: #fff; transform-origin: left; animation: fill var(--slide-ms, 6000ms) linear forwards; }
.slides.paused .slide-dot.active::after { animation-play-state: paused; }
@keyframes fill { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@media (prefers-reduced-motion: reduce) { .slide { transition: none; } .slide-dot.active::after { animation: none; } }

/* Toast */
.auth-toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); background: var(--dark); color: #fff; padding: 13px 20px; border-radius: 12px; font-size: 14.5px; z-index: 9999; box-shadow: 0 14px 30px rgba(0, 0, 0, .25); max-width: calc(100% - 32px); }
.auth-toast.error { background: var(--danger); }

@media (max-width: 980px) {
  .auth-page { grid-template-columns: minmax(0, 1fr); }
  .visual-side { display: none; }
  .form-side { padding: 20px 20px 24px; }
  .form-container { padding: 28px 0 20px; }
}
@media (max-width: 480px) {
  .logo-img { height: 28px; }
  .back-home { padding: 8px 6px; font-size: 13px; }
}