/* ==========================================
   Design System — Editorial Finance
   ========================================== */

:root {
    /* Colors */
    --color-navy: #1a2332;
    --color-navy-light: #2d3748;
    --color-cream: #faf9f6;
    --color-cream-dark: #f1ede6;
    --color-amber: #d4a574;
    --color-amber-dark: #c97f4a;
    --color-grey: #6b7280;
    --color-grey-light: #e5e7eb;
    --color-grey-dark: #4b5563;

    /* Typography */
    --font-display: 'Crimson Pro', serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Animations */
    --transition-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   Reset & Base
   ========================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-navy);
    background: var(--color-cream);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-cream);
    padding: var(--space-2xl) var(--space-md);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, var(--color-cream-dark) 100%);
    opacity: 0.4;
    z-index: 0;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s var(--transition-slow) backwards;
}

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

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-amber-dark);
    margin-bottom: var(--space-md);
    font-weight: 500;
    animation: fadeInUp 1s 0.1s var(--transition-slow) backwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 600;
    line-height: 1.1;
    color: var(--color-navy);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
    animation: fadeInUp 1s 0.2s var(--transition-slow) backwards;
}

.hero-description {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-grey);
    max-width: 650px;
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 1s 0.3s var(--transition-slow) backwards;
}

.hero-features {
    display: grid;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    border-left: 2px solid var(--color-grey-light);
    padding-left: var(--space-lg);
}

.feature {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
    animation: fadeInUp 1s 0.4s var(--transition-slow) backwards;
}

.feature:nth-child(2) {
    animation-delay: 0.5s;
}

.feature:nth-child(3) {
    animation-delay: 0.6s;
}

.feature-icon {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-amber-dark);
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-amber);
    border-radius: 4px;
    min-width: 48px;
    text-align: center;
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.feature-text strong {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-navy);
}

.feature-text span {
    font-size: 0.938rem;
    color: var(--color-grey);
}

.cta-button {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-cream);
    background: var(--color-navy);
    padding: 1rem 2.5rem;
    border: none;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 1s 0.7s var(--transition-slow) backwards;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-amber-dark);
    transition: left var(--transition-slow);
    z-index: 0;
}

.cta-button:hover::before {
    left: 0;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(26, 35, 50, 0.2);
}

.cta-button span {
    position: relative;
    z-index: 1;
}

.hero-tools {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-grey-light);
    animation: fadeInUp 1s 0.8s var(--transition-slow) backwards;
}

.tool-link {
    font-size: 1rem;
    color: var(--color-grey-dark);
    text-decoration: none;
    transition: color var(--transition-base);
    display: inline-block;
}

.tool-link:hover {
    color: var(--color-amber-dark);
}

/* ==========================================
   Calculator Section
   ========================================== */

.calculator-section,
.results-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-md);
}

.section-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--color-navy);
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-amber-dark);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    color: var(--color-navy);
    letter-spacing: -0.02em;
}

/* ==========================================
   Form Styles
   ========================================== */

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-section-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-navy);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-grey-light);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-navy);
    letter-spacing: 0.01em;
    text-transform: uppercase;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Info Icon & Tooltip */
.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-grey-light);
    color: var(--color-grey-dark);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: help;
    position: relative;
    transition: all var(--transition-base);
    flex-shrink: 0;
    text-transform: none;
}

.info-icon:hover {
    background: var(--color-amber);
    color: white;
}

.info-icon::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%) translateY(5px);
    background: var(--color-navy);
    color: var(--color-cream);
    padding: var(--space-sm) var(--space-md);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    white-space: normal;
    width: 280px;
    max-width: 90vw;
    text-align: left;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 100;
    box-shadow: 0 4px 12px rgba(26, 35, 50, 0.3);
    letter-spacing: 0;
}

.info-icon::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: calc(100% + 2px);
    transform: translateX(-50%) translateY(5px);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--color-navy);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 101;
}

.info-icon:hover::after,
.info-icon:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.form-input {
    width: 100%;
    font-family: var(--font-mono);
    font-size: 1.125rem;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-grey-light);
    background: white;
    color: var(--color-navy);
    transition: all var(--transition-base);
    outline: none;
}

.input-with-unit .form-input {
    padding-right: 3rem;
}

.form-input:focus {
    border-color: var(--color-amber);
    box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.1);
}

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

.input-unit {
    position: absolute;
    right: 1rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-grey);
    pointer-events: none;
}

/* Radio Group */
.radio-group {
    display: grid;
    gap: var(--space-sm);
}

.radio-option {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md);
    border: 2px solid var(--color-grey-light);
    background: white;
    cursor: pointer;
    transition: all var(--transition-base);
}

.radio-option:hover {
    border-color: var(--color-amber);
}

.radio-option input[type="radio"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-amber-dark);
}

.radio-option input[type="radio"]:checked + .radio-label {
    color: var(--color-navy);
}

.radio-label {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.radio-label strong {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-navy);
}

.radio-label small {
    font-size: 0.875rem;
    color: var(--color-grey);
}

/* Sondertilgungen */
.sondertilgungen-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.sondertilgung-entry {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: var(--space-sm);
    align-items: end;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-remove {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    padding: 1rem 2rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.btn-primary {
    background: var(--color-navy);
    color: var(--color-cream);
    width: 100%;
    margin-top: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-amber-dark);
    transition: left var(--transition-slow);
    z-index: 0;
}

.btn-primary:hover::before {
    left: 0;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(26, 35, 50, 0.2);
}

.btn-secondary {
    background: white;
    color: var(--color-navy);
    border: 2px solid var(--color-grey-light);
    width: 100%;
}

.btn-secondary:hover {
    border-color: var(--color-amber);
    background: var(--color-cream);
}

.btn-remove {
    background: var(--color-navy);
    color: white;
    padding: 0.875rem 1.5rem;
    font-size: 0.875rem;
}

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

/* ==========================================
   Results Section
   ========================================== */

.results-section {
    animation: fadeInUp 0.6s var(--transition-slow);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.summary-grid .summary-card:nth-child(4),
.summary-grid .summary-card:nth-child(5) {
    /* Letzten zwei Karten zentrieren */
    grid-column: auto;
}

.summary-card {
    background: white;
    border: 2px solid var(--color-grey-light);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-amber);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-slow);
}

.summary-card:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

.summary-card:hover {
    border-color: var(--color-amber);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(26, 35, 50, 0.08);
}

.summary-card h4 {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-grey);
    margin-bottom: var(--space-sm);
}

.summary-card p {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-navy);
    line-height: 1.2;
}

/* Table */
.table-wrapper {
    margin-top: var(--space-2xl);
}

.table-header {
    margin-bottom: var(--space-lg);
}

.table-header h3 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--space-xs);
}

.table-header p {
    font-size: 1rem;
    color: var(--color-grey);
}

.table-container {
    border: 2px solid var(--color-grey-light);
    overflow-x: auto;
    background: white;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--color-navy);
    color: var(--color-cream);
}

th {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-md);
    text-align: right;
    position: sticky;
    top: 0;
    z-index: 10;
}

th:first-child {
    text-align: left;
}

td {
    font-family: var(--font-mono);
    font-size: 0.938rem;
    padding: var(--space-md);
    text-align: right;
    border-bottom: 1px solid var(--color-grey-light);
    color: var(--color-navy);
}

td:first-child {
    font-family: var(--font-body);
    text-align: left;
    font-weight: 500;
}

tbody tr {
    transition: background var(--transition-base);
}

tbody tr:hover {
    background: var(--color-cream);
}

tbody tr.highlight {
    background: rgba(212, 165, 116, 0.15) !important;
}

tbody tr.zinsbindung-end {
    background: rgba(212, 165, 116, 0.25) !important;
    font-weight: 600;
}

/* ==========================================
   Utilities
   ========================================== */

.hidden {
    display: none !important;
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 768px) {
    :root {
        --space-xl: 2rem;
        --space-2xl: 3rem;
        --space-3xl: 4rem;
    }

    .hero {
        min-height: auto;
        padding: var(--space-2xl) var(--space-md);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1.125rem;
    }

    .feature {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .sondertilgung-entry {
        grid-template-columns: 1fr;
    }

    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .table-container {
        font-size: 0.875rem;
    }

    th, td {
        padding: var(--space-sm);
        font-size: 0.813rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .info-icon::after {
        width: 240px;
        font-size: 0.813rem;
        left: auto;
        right: 0;
        transform: translateX(0) translateY(5px);
    }

    .info-icon:hover::after {
        transform: translateX(0) translateY(0);
    }

    .info-icon::before {
        left: auto;
        right: 10px;
        transform: translateX(0) translateY(5px);
    }

    .info-icon:hover::before {
        transform: translateX(0) translateY(0);
    }
}