*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #007a3d;
    --color-primary-dark: #005a2b;
    --color-primary-light: #e6f4ec;
    --color-accent: #00a550;
    --color-bg: #f5f7f6;
    --color-card: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #dde3df;
    --color-result-bg: #f0faf4;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--color-primary);
    color: #fff;
    padding: 16px 0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

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

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-text span {
    font-weight: 400;
}

.tarif-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* Intro */
.intro-box {
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    padding: 20px 24px;
    margin: 24px 0;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.intro-box h2 {
    color: var(--color-primary-dark);
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.intro-box p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Cards */
.card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--color-border);
}

.card-title {
    color: var(--color-primary-dark);
    font-size: 1.1rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-primary-light);
}

/* Form Elements */
.form-group {
    margin-bottom: 16px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group > label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--color-text);
}

select,
input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
    color: var(--color-text);
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

select:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 165, 80, 0.15);
}

.hint {
    display: block;
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

/* Checkboxes */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    line-height: 1.4;
}

.checkbox-label input[type="checkbox"] {
    margin-top: 3px;
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    flex-shrink: 0;
}

.sub-input {
    margin-left: 28px;
    margin-top: 8px;
    padding: 12px;
    background: var(--color-bg);
    border-radius: 6px;
    border: 1px solid var(--color-border);
}

.sub-input label {
    display: block;
    font-weight: 500;
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.sub-input input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.95rem;
}

.sub-input input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 165, 80, 0.15);
}

/* Buttons */
.button-row {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.btn {
    padding: 12px 32px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-secondary {
    background: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #c5ccc8;
}

/* Result */
.result-card {
    background: var(--color-result-bg);
    border-color: var(--color-primary);
    border-width: 2px;
}

#ergebnis-details {
    margin-bottom: 16px;
}

.result-line {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.92rem;
}

.result-line:last-child {
    border-bottom: none;
}

.result-line .label {
    flex: 1;
    padding-right: 16px;
}

.result-line .value {
    font-weight: 600;
    white-space: nowrap;
    text-align: right;
}

.result-line.subtotal {
    font-weight: 600;
    background: rgba(0, 122, 61, 0.05);
    padding: 8px;
    border-radius: 4px;
    margin: 4px 0;
}

.result-line.zuschlag {
    color: var(--color-text-light);
    font-size: 0.88rem;
    padding-left: 12px;
}

.total-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 12px 0;
    font-size: 1.1rem;
    font-weight: 700;
    border-top: 2px solid var(--color-primary);
    margin-top: 8px;
}

.total-brutto {
    font-size: 1.25rem;
    color: var(--color-primary-dark);
    border-top: none;
    padding-top: 4px;
}

.disclaimer {
    margin-top: 16px;
    font-size: 0.8rem;
    color: var(--color-text-light);
    font-style: italic;
    line-height: 1.5;
}

/* Footer */
.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.85);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    font-size: 0.85rem;
}

.footer-small {
    font-size: 0.75rem;
    margin-top: 6px;
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 600px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .card {
        padding: 16px;
    }

    .button-row {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .total-brutto {
        font-size: 1.1rem;
    }
}

/* Animation */
.card {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}