:root {
    --acqua:   #1a3a4a;
    --acqua-m: #4a9bb5;
    --acqua-l: #a8d8e8;
    --grano:   #d4a843;
    --nebbia:  #f5f2ee;
    --pietra:  #e8e0d5;
    --ink:     #1c1a17;
}

body {
    font-family: 'Spectral', serif;
    background: var(--acqua);
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 1.5rem;
}

/* Griglia sfondo */
body::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
    linear-gradient(rgba(74,155,181,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,155,181,0.06) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* Cerchi decorativi */
body::after {
    content: '';
    position: absolute;
    top: -150px; right: -150px;
    width: 500px; height: 500px;
    border-radius: 50%;
    overflow: hidden;
    background: radial-gradient(circle, rgba(74,155,181,0.1) 0%, transparent 70%);
}

.login-card {
    background: #fff;
    border-radius: 4px;
    padding: 3rem;
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 2;
    box-shadow: 0 24px 80px rgba(0,0,0,0.3);
    margin: auto;
}

/* Striscia dorata in cima */
.login-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--grano);
    border-radius: 4px 4px 0 0;
}

.login-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.login-logo-icon {
    width: 44px; height: 44px;
    background: var(--grano);
    border-radius: 50%;
    display: flex; align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.login-logo-icon img {
    height: 80%;
    width: auto;
}

.login-logo-text {
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    color: var(--acqua);
    line-height: 1.2;
}

.login-logo-text small {
    display: block;
    font-family: 'Space Mono', monospace;
    font-size: 0.55rem;
    color: var(--acqua-m);
    letter-spacing: 0.1em;
}

.login-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.6rem;
    color: var(--acqua);
    margin-bottom: 0.3rem;
}

.login-subtitle {
    font-family: 'Space Mono', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--acqua-m);
    margin-bottom: 2rem;
}

.form-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--acqua);
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.form-control {
    border: 1px solid var(--pietra);
    border-radius: 2px;
    padding: 0.75rem 1rem;
    font-family: 'Spectral', serif;
    font-size: 0.95rem;
    color: var(--ink);
    background: var(--nebbia);
    transition: all 0.3s;
}

.form-control:focus {
    border-color: var(--acqua-m);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(74,155,181,0.15);
    outline: none;
}

.form-control.is-invalid {
    border-color: #dc3545;
    background: #fff5f5;
}

/* Occhio mostra/nascondi password */
.input-group .btn-eye {
    border: 1px solid var(--pietra);
    border-left: none;
    background: var(--nebbia);
    color: #888;
    border-radius: 0 2px 2px 0;
    padding: 0 0.9rem;
    transition: all 0.2s;
}

.input-group .btn-eye:hover {
    background: var(--pietra);
    color: var(--acqua);
}

.input-group .form-control {
    border-radius: 2px 0 0 2px;
}

.btn-accedi {
    background: var(--acqua);
    color: #fff;
    font-family: 'Space Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 700;
    padding: 0.85rem;
    border: none;
    border-radius: 2px;
    width: 100%;
    transition: all 0.3s;
    margin-top: 0.5rem;
}

.btn-accedi:hover {
    background: var(--acqua-m);
    transform: translateY(-1px);
}

.btn-accedi:disabled {
    opacity: 0.6;
    transform: none;
    cursor: not-allowed;
}

/* Messaggio errore */
.alert-errore {
    background: #fff5f5;
    border: 1px solid #f5c6cb;
    border-left: 3px solid #dc3545;
    border-radius: 2px;
    padding: 0.8rem 1rem;
    font-family: 'Space Mono', monospace;
    font-size: 0.68rem;
    color: #721c24;
    letter-spacing: 0.05em;
    display: none;
    margin-bottom: 1rem;
}

.alert-errore.visibile { display: block; }

/* Spinner caricamento */
.spinner-login {
    display: none;
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 0 auto;
}

.spinner-login.visibile { display: inline-block; }

@keyframes spin {
    to { transform: rotate(360deg); }
}

.torna-home {
    display: block;
    text-align: center;
    margin-top: 1.5rem;
    font-family: 'Space Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    color: #888;
    text-decoration: none;
    text-transform: uppercase;
    transition: color 0.2s;
}

.torna-home:hover { color: var(--acqua-m); }

/* Cerchio in basso a sinistra */
.deco-circle {
    position: absolute;
    bottom: -100px; left: -100px;
    width: 350px; height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212,168,67,0.08) 0%, transparent 70%);
    z-index: 0;
}