.auth-page {
    min-height: 100vh;
    background:
        radial-gradient(circle at 0% 0%, rgba(var(--seyvo-primary-rgb),.14), transparent 28%),
        radial-gradient(circle at 100% 10%, rgba(var(--seyvo-primary-rgb), .16), transparent 24%),
        radial-gradient(circle at 50% 100%, rgba(var(--seyvo-primary-rgb),.10), transparent 30%),
        linear-gradient(135deg, #f8fbff 0%, #eef4ff 46%, #f9fbff 100%);
}

.auth-shell-wrapper {
    min-height: 100vh;
    padding: 28px;
}

.auth-shell {
    min-height: calc(100vh - 56px);
    display: grid;
    grid-template-columns: minmax(320px, 1.02fr) minmax(420px, .98fr);
    background: #ffffff;
    border: 1px solid rgba(var(--seyvo-primary-rgb),.08);
    border-radius: 34px;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(15, 23, 42, .10);
    backdrop-filter: blur(18px);
}

.auth-brand-panel {
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(160deg, rgba(14, 27, 61, .96) 0%, rgba(19, 37, 83, .94) 44%, rgba(33, 80, 216, .92) 100%);
    color: var(--seyvo-white);
}

.auth-brand-backdrop {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(var(--seyvo-primary-rgb),.18), transparent 22%),
        radial-gradient(circle at 80% 15%, rgba(var(--seyvo-primary-rgb),.08), transparent 18%),
        radial-gradient(circle at 70% 75%, rgba(var(--seyvo-primary-rgb),.18), transparent 26%),
        radial-gradient(circle at 15% 85%, rgba(var(--seyvo-primary-rgb),.18), transparent 24%);
}

.auth-brand-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 42px 42px 36px;
}

.auth-brand-mark {
    display: inline-flex;
    align-items: center;
    min-height: 46px;
}

.auth-brand-logo {
    max-width: 160px;
    max-height: 50px;
}

.auth-brand-wordmark {
    color: var(--seyvo-white);
    font-size: 1.55rem;
    font-weight: 900;
    letter-spacing: -.03em;
}

.auth-brand-copy {
    margin: 42px 0 28px;
    max-width: 560px;
}

.auth-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(var(--seyvo-primary-rgb),.12);
    border: 1px solid rgba(var(--seyvo-primary-rgb),.14);
    color: rgba(var(--seyvo-primary-rgb),.88);
    font-size: .8rem;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
    margin-bottom: 18px;
}

.auth-brand-copy h1 {
    color: var(--seyvo-white);
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
    font-weight: 900;
    letter-spacing: -.05em;
    margin: 0 0 16px;
}

.auth-brand-copy p {
    color: rgba(var(--seyvo-primary-rgb),.76);
    font-size: 1rem;
    line-height: 1.75;
    max-width: 540px;
    margin: 0;
}

.auth-brand-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.auth-feature-card {
    padding: 18px;
    border-radius: 22px;
    background: rgba(var(--seyvo-primary-rgb),.10);
    border: 1px solid rgba(var(--seyvo-primary-rgb),.12);
    box-shadow: inset 0 1px 0 rgba(var(--seyvo-primary-rgb),.08);
}

.auth-feature-icon {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(var(--seyvo-primary-rgb),.14);
    color: var(--seyvo-white);
    margin-bottom: 14px;
    font-size: 1rem;
}

.auth-feature-card strong {
    display: block;
    color: var(--seyvo-white);
    font-size: .98rem;
    font-weight: 800;
    margin-bottom: 6px;
}

.auth-feature-card p {
    margin: 0;
    color: rgba(var(--seyvo-primary-rgb),.72);
    font-size: .86rem;
    line-height: 1.55;
}

.auth-form-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
}

.auth-form-panel-inner {
    width: 100%;
    max-width: 560px;
}

.auth-form-card {
    position: relative;
    padding: 34px;
    border-radius: 30px;
    background: #ffffff;
    border: 1px solid rgba(0,0,0,.08);
    box-shadow: 0 18px 50px rgba(15, 23, 42, .08);
    backdrop-filter: blur(18px);
}

.auth-card-header {
    margin-bottom: 24px;
}

.auth-kicker {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--sv-jade);
    font-size: .78rem;
    font-weight: 900;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.auth-card-title {
    margin: 0 0 10px;
    font-size: clamp(1.7rem, 3vw, 2.3rem);
    line-height: 1.08;
    letter-spacing: -.04em;
    color: var(--seyvo-ink);
    font-weight: 900;
}

.auth-card-subtitle {
    margin: 0;
    color: #64748b;
    font-size: .98rem;
    line-height: 1.7;
}

.auth-form .form-group,
.auth-form .custom-control,
.auth-form .mt-3.custom-control {
    margin-bottom: 16px;
}

.auth-form label {
    color: var(--seyvo-ink);
    font-weight: 800;
    margin-bottom: 8px;
    font-size: .9rem;
}

.auth-input-wrap {
    position: relative;
}

.auth-input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    pointer-events: none;
    font-size: .96rem;
}

.auth-form .form-control {
    min-height: 56px;
    border-radius: 16px;
    border: 1px solid rgba(var(--seyvo-primary-rgb),.28);
    background: rgba(var(--seyvo-primary-rgb),.94);
    box-shadow: none;
    padding: 0 16px 0 46px;
    font-size: .96rem;
    color: var(--seyvo-ink);
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.auth-form .form-control:focus {
    border-color: rgba(var(--seyvo-primary-rgb),.42);
    background: var(--seyvo-white);
    box-shadow: 0 0 0 4px rgba(var(--seyvo-primary-rgb),.08);
}

.auth-form [data-password-toggle-view] .auth-toggle-eye,
.auth-form .password-toggle-view {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
}

.auth-form .is-invalid {
    border-color: rgba(239,68,68,.55);
}

.auth-form .invalid-feedback,
.auth-form .text-danger,
.auth-form .alert {
    border-radius: 14px;
}

.auth-utility-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.auth-form .custom-control-label,
.auth-form .custom-control-label small,
.auth-form small,
.auth-form .text-muted {
    color: #64748b;
    line-height: 1.6;
}

.auth-form .custom-control-label a,
.auth-form .text-muted a,
.auth-link-inline {
    color: var(--sv-jade);
    font-weight: 800;
    text-decoration: none;
}

.auth-primary-btn {
    min-height: 58px;
    border: none;
    border-radius: 18px;
    font-size: .98rem;
    font-weight: 900;
    letter-spacing: -.01em;
    box-shadow: 0 16px 30px rgba(var(--seyvo-primary-rgb),.22);
    background: linear-gradient(135deg, var(--sv-primary-dark) 0%, var(--sv-primary) 55%, var(--sv-primary) 100%);
}

.auth-primary-btn:hover,
.auth-primary-btn:focus {
    transform: translateY(-1px);
    box-shadow: 0 18px 32px rgba(var(--seyvo-primary-rgb),.28);
}

.auth-divider {
    position: relative;
    text-align: center;
    margin: 22px 0 18px;
}

.auth-divider::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background: rgba(var(--seyvo-primary-rgb),.24);
}

.auth-divider span {
    position: relative;
    z-index: 1;
    display: inline-block;
    padding: 0 14px;
    background: #ffffff;
    color: #94a3b8;
    font-weight: 800;
    font-size: .76rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.auth-social-grid {
    display: grid;
    gap: 10px;
}

.auth-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 52px;
    border-radius: 16px;
    border: 1px solid rgba(var(--seyvo-primary-rgb),.24);
    background: var(--seyvo-white);
    color: var(--seyvo-ink);
    font-weight: 800;
}

.auth-social-btn:hover {
    background: #f8fbff;
    border-color: rgba(var(--seyvo-primary-rgb),.18);
    color: var(--sv-primary-dark);
}

.auth-footer-switch {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid rgba(var(--seyvo-primary-rgb),.16);
    text-align: center;
    color: #64748b;
}

.auth-footer-switch a {
    color: var(--seyvo-ink);
    font-weight: 900;
    text-decoration: none;
}

.auth-alerts {
    margin-bottom: 18px;
}

.auth-alerts .alert {
    border: none;
    box-shadow: 0 10px 24px rgba(15,23,42,.06);
}

@media (max-width: 1199px) {
    .auth-shell {
        grid-template-columns: 1fr;
    }

    .auth-brand-panel {
        min-height: 340px;
    }

    .auth-brand-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 767px) {
    .auth-shell-wrapper {
        padding: 12px;
    }

    .auth-shell {
        min-height: auto;
        border-radius: 24px;
    }

    .auth-brand-panel {
        display: none;
    }

    .auth-form-panel {
        padding: 12px;
    }

    .auth-form-card {
        padding: 24px 18px;
        border-radius: 22px;
    }

    .auth-card-title {
        font-size: 1.72rem;
    }
}

/* ── AUDIT: Focus states brandés + error shake + stagger feature cards ── */

/* Branded focus ring — remplace le bleu Bootstrap */
.auth-form .form-control:focus,
.auth-form .form-control:focus-visible {
    border-color: var(--sv-primary);
    background: var(--seyvo-white);
    box-shadow: 0 0 0 4px rgba(var(--seyvo-primary-rgb),.12);
    outline: none;
}

/* Succès input */
.auth-form .form-control.is-valid:focus {
    border-color: var(--sv-primary);
    box-shadow: 0 0 0 4px rgba(34,197,94,.12);
}

/* Erreur avec shake animation */
.auth-form .form-control.is-invalid,
.auth-form .was-validated .form-control:invalid {
    border-color: rgba(239,68,68,.60);
    box-shadow: 0 0 0 4px rgba(239,68,68,.10);
    animation: sv-auth-shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}
@keyframes sv-auth-shake {
    0%, 100% { transform: translateX(0); }
    15%       { transform: translateX(-6px); }
    30%       { transform: translateX(5px); }
    45%       { transform: translateX(-4px); }
    60%       { transform: translateX(3px); }
    75%       { transform: translateX(-2px); }
}

/* ── Brand panel — stagger d'entrée sur feature cards ── */
.auth-feature-card {
    opacity: 0;
    animation: sv-auth-up 420ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes sv-auth-up {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
.auth-feature-card:nth-child(1) { animation-delay: 120ms; }
.auth-feature-card:nth-child(2) { animation-delay: 220ms; }
.auth-feature-card:nth-child(3) { animation-delay: 320ms; }
.auth-feature-card:nth-child(4) { animation-delay: 420ms; }

/* ── Auth primary button enrichi ── */
.auth-primary-btn {
    transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.auth-primary-btn:hover,
.auth-primary-btn:focus {
    transform: translateY(-2px) scale(1.015);
    box-shadow: 0 20px 36px rgba(var(--seyvo-primary-rgb),.32);
}
.auth-primary-btn:active {
    transform: translateY(0) scale(.98);
    transition-duration: 80ms;
}