:root {
    /* Farben aus dem bestehenden CalendarApp-Login übernommen */
    --color-bg-grad-start: #14b6ea;   /* Cyan, unten links */
    --color-bg-grad-end: #2fc9a7;     /* Türkis-Grün, oben rechts */
    --color-card: #163f46;            /* dunkles Petrol */
    --color-card-border: rgba(255, 255, 255, 0.14);
    --color-text: #ffffff;
    --color-muted: #9fc9cd;           /* helles Blaugrau für Links */
    --color-input-border: #2bb6c9;
    --color-placeholder: #a9a9a9;
    --color-button-bg: #7a716c;       /* mattes Taupe/Grau, wie der alte Login-Button */
    --color-button-hover: #6b625d;
    --color-error-bg: rgba(220, 53, 69, 0.18);
    --color-error-text: #ffc2c8;
    --color-info-bg: rgba(255, 255, 255, 0.12);
    --color-info-text: #ffffff;
    --radius: 0px; /* alter Login: durchgehend eckige Formen, keine abgerundeten Ecken */
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-grad-start) 0%, var(--color-bg-grad-end) 100%);
    color: var(--color-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    padding: 16px;
}

.auth-card {
    width: 100%;
    max-width: 430px;
    background: var(--color-card);
    border: 1px solid var(--color-card-border);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    padding: 28px 32px 36px;
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 4px 0 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-card-border);
}

.auth-logo img {
    height: 60px;
    width: auto;
}

/* Sichtbare Überschrift durch Logo ersetzt, Text bleibt für Screenreader */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.form-group {
    margin-bottom: 18px;
}

.form-group-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 6px;
}

.form-group label {
    display: block;
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-text);
}

.form-group-header label {
    margin-bottom: 0;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: 10px 12px;
    background: #ffffff;
    color: #1f2430;
    border: 1px solid var(--color-input-border);
    border-radius: var(--radius);
    font-size: 1rem;
}

.form-group input::placeholder {
    color: var(--color-placeholder);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-text);
}

.form-group-inline {
    text-align: center;
}

.form-group-inline label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text);
}

.link-forgot {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-muted);
    text-decoration: none;
    white-space: nowrap;
}

.link-forgot:hover {
    text-decoration: underline;
}

.btn-primary {
    display: block;
    width: auto;
    min-width: 140px;
    margin: 22px auto 0;
    padding: 10px 28px;
    background: var(--color-button-bg);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--color-button-hover);
}

.alert {
    padding: 10px 12px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
}

.alert-info {
    background: var(--color-info-bg);
    color: var(--color-info-text);
}

.lang-switch {
    margin-top: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-text);
}

.lang-switch select {
    width: auto;
    padding: 4px 6px;
}

.register-link,
.back-link {
    text-align: center;
    margin-top: 18px;
    font-size: 0.9rem;
}

.register-link a,
.back-link a {
    color: var(--color-muted);
    font-weight: 700;
    text-decoration: none;
}

.register-link a:hover,
.back-link a:hover {
    text-decoration: underline;
}

/* Honeypot: für echte Nutzer unsichtbar, aber nicht per display:none
   (manche Bots ignorieren display:none-Felder gezielt). */
.hp-field {
    position: absolute;
    left: -9999px;
    top: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

@media (min-width: 480px) {
    .auth-card {
        padding: 36px 40px 44px;
    }
}