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

:root {
    --accent:   #ff6b00;
    --accent2:  #ff9a3c;
    --bg:       #f4f5f8;
    --card:     #ffffff;
    --text-1:   #1a2540;
    --text-2:   #5a6880;
    --text-3:   #9aa3b4;
    --border:   #e5e9f2;
    --hover:    #f8f9fb;
    --error:    #ef4444;
    --success:  #10b981;
}
[data-theme="dark"] {
    --bg:     #10182a;
    --card:   #1a2335;
    --text-1: #e8edf7;
    --text-2: #8a97b0;
    --text-3: #4a5568;
    --border: #283044;
    --hover:  #1f2d42;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    transition: background .3s;
    position: relative;
    overflow: hidden;
}

/* ── Décoration fond ── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 10% 20%, rgba(255,107,0,.07) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 90% 80%, rgba(59,130,246,.06) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

/* Cercles décoratifs */
.deco {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}
.deco-1 {
    width: 380px; height: 380px;
    top: -120px; right: -80px;
    background: radial-gradient(circle, rgba(255,107,0,.08) 0%, transparent 70%);
}
.deco-2 {
    width: 300px; height: 300px;
    bottom: -80px; left: -60px;
    background: radial-gradient(circle, rgba(59,130,246,.07) 0%, transparent 70%);
}
.deco-3 {
    width: 120px; height: 120px;
    top: 40%; left: 8%;
    border: 1.5px solid rgba(255,107,0,.1);
    animation: spin 18s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Carte ── */
.auth-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px 36px 36px;
    box-shadow:
        0 4px 6px rgba(0,0,0,.04),
        0 20px 60px rgba(0,0,0,.09);
    animation: cardIn .45s cubic-bezier(.34,1.56,.64,1) both;
}
@keyframes cardIn {
    from { opacity: 0; transform: translateY(24px) scale(.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Logo + header ── */
.auth-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
}
.auth-logo-ico {
    width: 38px; height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 18px;
    box-shadow: 0 4px 14px rgba(255,107,0,.35);
}
.auth-logo-txt {
    font-family: 'Syne', sans-serif;
    font-weight: 800; font-size: 20px;
    color: var(--text-1);
    letter-spacing: -.02em;
}
.auth-logo-txt span { color: var(--accent); }

/* Icône centrale */
.auth-icon-wrap {
    width: 58px; height: 58px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255,107,0,.12), rgba(255,154,60,.06));
    border: 1.5px solid rgba(255,107,0,.18);
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; color: var(--accent);
    margin-bottom: 18px;
}

.auth-title {
    font-family: 'Syne', sans-serif;
    font-weight: 800; font-size: 22px;
    color: var(--text-1);
    margin-bottom: 8px;
    letter-spacing: -.02em;
}
.auth-desc {
    font-size: 13.5px;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 28px;
}

/* ── Alerte statut session ── */
.auth-status {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 11px 14px;
    border-radius: 10px;
    background: rgba(16,185,129,.1);
    border: 1px solid rgba(16,185,129,.2);
    color: #059669;
    font-size: 13px; font-weight: 500;
    margin-bottom: 20px;
    animation: fadeIn .3s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* ── Champs ── */
.field-wrap {
    margin-bottom: 20px;
}
.field-label {
    display: block;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 7px;
}

.field-input-wrap {
    position: relative;
}
.field-input-wrap i {
    position: absolute;
    left: 13px; top: 50%;
    transform: translateY(-50%);
    color: var(--text-3);
    font-size: 15px;
    pointer-events: none;
    transition: color .18s;
}

.field-input {
    width: 100%;
    padding: 11px 14px 11px 40px;
    border-radius: 11px;
    border: 1.5px solid var(--border);
    background: var(--hover);
    color: var(--text-1);
    font-family: 'DM Sans', sans-serif;
    font-size: 14px;
    outline: none;
    transition: border-color .18s, box-shadow .18s, background .18s;
}
.field-input:focus {
    border-color: var(--accent);
    background: var(--card);
    box-shadow: 0 0 0 3.5px rgba(255,107,0,.12);
}
.field-input:focus + i,
.field-input-wrap:has(.field-input:focus) i { color: var(--accent); }
.field-input::placeholder { color: var(--text-3); }

/* Erreur */
.field-error {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 6px;
    font-size: 12px;
    color: var(--error);
}

/* ── Bouton principal ── */
.btn-primary {
    width: 100%;
    padding: 12px 0;
    border-radius: 11px;
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    font-family: 'Syne', sans-serif;
    font-weight: 700; font-size: 14px;
    letter-spacing: .01em;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 8px;
    box-shadow: 0 4px 16px rgba(255,107,0,.35);
    transition: opacity .18s, transform .15s, box-shadow .18s;
    margin-top: 4px;
}
.btn-primary:hover {
    opacity: .92;
    transform: translateY(-1px);
    box-shadow: 0 6px 22px rgba(255,107,0,.4);
}
.btn-primary:active { transform: translateY(0); }

/* ── Retour login ── */
.auth-back {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 22px;
    font-size: 13px;
    color: var(--text-3);
}
.auth-back a {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    transition: opacity .15s;
}
.auth-back a:hover { opacity: .75; }

/* ── Theme toggle (coin) ── */
.theme-toggle {
    position: fixed;
    top: 20px; right: 20px;
    z-index: 10;
    width: 38px; height: 38px;
    border-radius: 10px;
    border: 1.5px solid var(--border);
    background: var(--card);
    color: var(--text-2);
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
    cursor: pointer;
    transition: background .2s, border-color .2s, transform .15s;
    box-shadow: 0 2px 10px rgba(0,0,0,.07);
}
.theme-toggle:hover { transform: scale(1.07); }

/* Séparateur déco */
.auth-sep {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 20px 0 0;
}
.auth-sep::before, .auth-sep::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}
.auth-sep span {
    font-size: 11px;
    color: var(--text-3);
}