/* CSS Custom Properties für bessere Wartbarkeit */
:root {
    /* Farben */
    --color-white: #fff;
    --color-white-08: rgba(255, 255, 255, 0.08);
    --color-white-10: rgba(255, 255, 255, 0.10);
    --color-white-12: rgba(255, 255, 255, 0.12);
    --color-white-16: rgba(255, 255, 255, 0.16);
    --color-white-18: rgba(255, 255, 255, 0.18);
    --color-white-38: rgba(255, 255, 255, 0.38);
    --color-white-60: rgba(255, 255, 255, 0.60);
    --color-black-50: rgba(10, 10, 35, 0.5);
    --color-black-75: rgba(10, 10, 35, 0.75);
    --color-error-bg: rgba(255, 59, 48, 0.14);
    --color-error-border: rgba(255, 59, 48, 0.45);

    /* Abstände */
    --spacing-xs: 4px;
    --spacing-sm: 10px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 28px;
    --spacing-xxl: 36px;

    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-circle: 50%;

    /* Transitions */
    --transition-fast: 0.06s;
    --transition-normal: 0.2s;
    --transition-slow: 0.3s;

    /* Blur */
    --blur-backdrop: blur(14px);
}

/* Box-Sizing Reset */
.cfl *,
.cfl *::before,
.cfl *::after {
    box-sizing: border-box;
}

.cfl .cfl-field input {
    width: 100%;
    max-width: 100%;
}

/* === LAYOUT === */
.cfl-wrap {
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.cfl {
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-xxl) var(--spacing-xl);
    margin: 7vw;
    border-radius: var(--radius-lg);
    background: var(--color-white-08);
    border: 1px solid var(--color-white-18);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    backdrop-filter: var(--blur-backdrop);
    -webkit-backdrop-filter: var(--blur-backdrop);
}

.cfl.dark {
    background: rgba(10, 10, 35, 0.5);
    border: 1px solid rgba(10, 10, 35, 0.75);
    box-shadow: 0 0 10px rgba(255,255,255, 0);
}

#cfl-particles-canvas {
    z-index: -1 !important;
}

/* === TYPOGRAPHY === */
.cfl-title {
    margin: 0 0 6px;
    letter-spacing: -0.5px;
    font: 400 28px/1.2 system-ui, -apple-system, Segoe UI, Roboto, Arial;
    color: var(--color-black-75);
}

.dark .cfl-title {
    color: rgba(255, 255, 255, 0.80);
}

.cfl-subtitle {
    margin: 0 0 24px;
    letter-spacing: -0.5px;
    font-size: var(--spacing-md);
    font-weight: 400;
    color: var(--color-black-75);
}

.dark .cfl-subtitle {
    color: rgba(255, 255, 255, 0.90);
}

/* === FORM FIELDS === */
.cfl-field {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.cfl-field input {
    width: 100%;
    height: 48px;
    padding: 0 44px 0 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-white-18);
    background: var(--color-white-10);
    color: var(--color-white);
    font-size: 1rem;
    transition: border-color var(--transition-normal),
    background-color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-fast);
}

.dark .cfl-field input {
    background: rgba(10, 10, 35, 0.5);
    border: 1px solid rgba(10, 10, 35, 0.75);
}

.cfl-field input::placeholder {
    color: var(--color-white-60);
}

.cfl-field input:focus {
    outline: none;
    background: var(--color-white-16);
    border-color: var(--color-white-38);
    box-shadow: 0 0 0 4px var(--color-white-12);
}

.dark .cfl-field input:focus {
    background: rgba(10, 10, 35, 0.5);
    border-color: rgba(10, 10, 35, 0.75);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.12);
}

.cfl-hint {
    margin: 2rem 0 0 1rem;
    font-size: 0.8rem;
    display: none;
}

/* === PASSWORD TOGGLE === */
.cfl-pass .cfl-eye {
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    width: var(--spacing-xxl);
    height: var(--spacing-xxl);
    border-radius: var(--radius-circle);
    border: none;
    background: none;
    color: var(--color-white);
    cursor: pointer;
    display: grid;
    place-items: center;
}

.cfl-pass .cfl-eye::before {
    content: "👁︎";
    font-size: 18px;
    line-height: 1;
}

.cfl-pass .cfl-eye.on::before {
    content: "🙈";
}

/* === FORM CONTROLS === */
.cfl-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.cfl-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    opacity: 0.95;
}

.cfl-check input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-white);
}

/* === BUTTON === */
.cfl-btn {
    margin: var(--spacing-lg) 0 0 0;
    padding: 10px 45px 10px var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    background: var(--color-black-50);
    color: var(--color-white);
    font-weight: 400;
    font-size: 0.8rem;
    letter-spacing: 0.2px;
    position: relative;
    transition: all var(--transition-slow) ease-in-out;
}

.dark .cfl-btn {
    background: rgba(255, 255, 255, 0.6);
    color: rgba(0,0,0, 0.80);
}

.cfl-btn::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 18px;
    width: 1.5em;
    height: 1.5em;
    transform: translateY(-50%) translateX(-4px);
    opacity: 0.9;
    background: currentColor;
    -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="96" height="96" viewBox="0 0 24 24"><path d="M4 12h12m0 0-5-5m5 5-5 5" fill="none" stroke="%23000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>') no-repeat center / contain;
    mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="96" height="96" viewBox="0 0 24 24"><path d="M4 12h12m0 0-5-5m5 5-5 5" fill="none" stroke="%23000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>') no-repeat center / contain;
    transition: transform var(--transition-slow) ease-in-out, opacity var(--transition-slow) ease;
}

.dark .cfl-btn::after {
    background: rgba(0,0,0, 0.80);
}

.cfl-btn:hover {
    padding: 10px 43px 10px 22px;
    background: var(--color-black-75);
}

.dark .cfl-btn:hover {
    background: rgba(255, 255, 255, 1);
}

.cfl-btn:hover::after,
.cfl-btn:focus-visible::after {
    transform: translateY(-50%) translateX(4px) scale(1.18);
    transition: all var(--transition-slow) ease-in-out;
    opacity: 1;
}

.cfl-btn:active {
    transform: translateY(0);
}

.cfl-btn:active::after {
    transform: translateY(-50%) translateX(2px);
}

/* === ERROR STYLING === */
.cfl-error {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    color: var(--color-white);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.8rem;
}

/* === MEDIA QUERIES === */
@media (max-width: 420px) {
    .cfl {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .cfl-title {
        font-size: 1.6rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .cfl-btn::after {
        transform: translateY(-50%);
    }

    .cfl-btn:hover::after,
    .cfl-btn:focus-visible::after {
        transform: translateY(-50%);
    }
}