/* ===========================
   Body & Hintergrund
   =========================== */
body {
    font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    background-image: url('boxen/background.jpg');
    background-size: cover;
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-position: center;
    color: #E6F0F3; /* Frost White */
}

main {
    display: flex;
    justify-content: center; /* horizontal zentrieren */
    align-items: center;     /* vertikal zentrieren */
    min-height: calc(100vh - 180px); /* Platz für Header/Footer */
    padding: 2rem 0;
}

/* ===========================
   Register-Container als Neon-Glas-Box
   =========================== */
.register-container {
    background: linear-gradient(135deg, rgba(47, 47, 47, 0.65) 60%, rgba(160, 59, 68, 0.18) 100%);
    border-radius: 14px;
    padding: 2.5rem 2rem 2rem 2rem;
    width: 100%;
    max-width: 420px;
    box-shadow:
        0 4px 24px rgba(20, 77, 59, 0.18),
        inset 0 0 0 1.5px rgba(200, 214, 229, 0.12),
        inset 0 1.5px 24px rgba(160, 59, 68, 0.10);
    color: #E6F0F3; /* Frost White */
    text-align: center;
    backdrop-filter: blur(12px) saturate(1.2);
    animation: fadeInRegister 0.7s cubic-bezier(.4,0,.2,1);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
    user-select: none;
}

.register-container:hover {
    transform: translateY(-6px);
    box-shadow:
        0 8px 30px rgba(20, 77, 59, 0.3),
        inset 0 0 0 2px rgba(200, 214, 229, 0.2),
        inset 0 3px 36px rgba(160, 59, 68, 0.15);
}

@keyframes fadeInRegister {
    from { opacity: 0; transform: translateY(30px);}
    to   { opacity: 1; transform: translateY(0);}
}

/* ===========================
   Überschrift
   =========================== */
.register-container h2 {
    margin-bottom: 1.5rem;
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    color: #C8D6E5; /* Icy Silver */
    text-shadow: 0 2px 8px rgba(160,59,68,0.12);
}

/* ===========================
   Labels & Inputs
   =========================== */
.register-container label {
    display: block;
    margin-bottom: 6px;
    text-align: left;
    font-weight: 600;
    color: #C8D6E5; /* Icy Silver */
    letter-spacing: 0.02em;
}

.input-icon {
    position: relative;
    width: 100%;
    margin-bottom: 18px;
}

.input-icon input[type="text"],
.input-icon input[type="email"],
.input-icon input[type="password"],
.input-icon input[type="date"] {
    width: 100%;
    padding: 12px 2.5em 12px 12px;
    border: 1.5px solid #A03B44; /* Icy Crimson Metallic */
    border-radius: 7px;
    background-color: rgba(255,255,255,0.1);
    color: #E6F0F3; /* Frost White */
    box-sizing: border-box;
    font-size: 1.08rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline-offset: 2px;
}

.input-icon input[type="text"]:focus,
.input-icon input[type="email"]:focus,
.input-icon input[type="password"]:focus,
.input-icon input[type="date"]:focus {
    border-color: #C8D6E5; /* Icy Silver */
    box-shadow: 0 0 0 3px rgba(200, 214, 229, 0.5);
    background-color: rgba(255,255,255,0.15);
}

.input-icon i {
    position: absolute;
    right: 13px;
    top: 50%;
    transform: translateY(-50%);
    color: #C8D6E5; /* Icy Silver */
    font-size: 1.2em;
    pointer-events: none;
    opacity: 0.85;
}

.register-container input::placeholder {
    color: #BFAF6A; /* dunkleres Gold */
    opacity: 0.85;
    font-size: 0.98em;
}

/* ===========================
   Nutzungsbedingungen Checkbox
   =========================== */
.terms-box {
    display: flex;
    align-items: flex-start;
    gap: 0.7em;
    margin: 1.2em 0 1.2em 0;
    text-align: left;
    font-size: 0.98em;
}

.terms-box input[type="checkbox"] {
    accent-color: #A03B44; /* Icy Crimson Metallic */
    width: 1.1em;
    height: 1.1em;
    margin-top: 0.2em;
}

.terms-box label {
    color: #E6F0F3; /* Frost White */
    font-weight: 500;
    letter-spacing: 0.01em;
}

.terms-box a {
    color: #C8D6E5; /* Icy Silver */
    text-decoration: underline;
    transition: color 0.2s;
}

.terms-box a:hover,
.terms-box a:focus-visible {
    color: #fff;
    background: #A03B44; /* Icy Crimson Metallic */
    border-radius: 4px;
    padding: 2px 6px;
    text-decoration: none;
    outline: none;
}

/* ===========================
   Submit-Button
   =========================== */
.register-container input[type="submit"] {
    background: linear-gradient(90deg, #C8D6E5 0%, #3b76a0 100%);
    color: #2E2B22; /* dunkles metallisch-braun */
    padding: 12px;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    transition: background 0.25s, color 0.25s, box-shadow 0.25s;
    font-weight: 700;
    width: 100%;
    font-size: 1.1rem;
    letter-spacing: 0.03em;
    box-shadow: 0 2px 8px rgba(200, 214, 229, 0.12);
}

.register-container input[type="submit"]:hover,
.register-container input[type="submit"]:focus-visible {
    background: linear-gradient(90deg, #C8D6E5 0%, #3b76a0 100%);
    color: #fff;
    box-shadow: 0 4px 16px rgba(200, 214, 229, 0.3);
    outline: none;
}

/* ===========================
   Meldungen (Fehler & Erfolg)
   =========================== */
.error {
    color: #FF6B6B; /* helles Blutrot */
    background: rgba(160, 59, 68, 0.15);
    border-left: 4px solid #FF6B6B;
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 18px;
    font-weight: 600;
    font-size: 1.05rem;
    text-align: left;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.12);
}

.success {
    color: #4CAF50;
    background: rgba(76, 175, 80, 0.10);
    border-left: 4px solid #4CAF50;
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 18px;
    font-weight: 600;
    font-size: 1.05rem;
    text-align: left;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.10);
}

/* ===========================
   Responsive Anpassungen
   =========================== */
@media (max-width: 600px) {
    .register-container {
        padding: 1.5rem 1rem 1.5rem 1rem;
        max-width: 97vw;
    }
    main {
        padding: 1rem 0;
        min-height: unset;
    }
    .terms-box {
        flex-direction: column;
        gap: 0.3em;
    }
}