:root {
    --primary-color: #D35400;
    --accent-color: #F39C12;
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --container-max-width: 1200px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.sticky-header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    height: 70px;
    display: flex;
    align-items: center;
}

.header-container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: auto;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
}

.user-avatar {
    height: 50px;
    width: auto;
    border-radius: 8px; /* Optional: slight rounding */
    transition: var(--transition);
}

.user-avatar:hover {
    transform: scale(1.05);
}

/* Hero Section */
.hero-section {
    padding: 6rem 0 4rem;
    text-align: center;
}

.hero-section h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-section p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

/* Tool Grid */
.tool-grid-section {
    padding-bottom: 6rem;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.8rem;
    align-items: start;
}

.tool-card {
    background-color: var(--card-bg);
    padding: 2.25rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    min-height: 350px;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    width: 100%;
}

.card-icon {
    margin-bottom: 1.25rem;
    color: var(--primary-color);
}

.card-icon svg {
    width: 42px;
    height: 42px;
}

.primary-orange-icon {
    stroke: var(--primary-color);
}

.tool-card h2 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.9rem;
    color: var(--text-primary);
    overflow-wrap: break-word;
    word-wrap: break-word;
    hyphens: manual;
}

.no-break {
    white-space: nowrap;
}

.tool-card p {
    color: var(--text-secondary);
    margin-bottom: 1.35rem;
    font-size: 0.9rem;
}

.card-content {
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    opacity: 0;
}

.tool-card.active .card-content {
    max-height: 500px; /* Large enough for the list */
    opacity: 1;
    margin-top: 1rem;
}

.link-list {
    list-style: none;
    width: 100%;
    text-align: left;
}

.link-list li {
    margin-bottom: 0.75rem;
}

.link-list li a {
    display: block;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 0.75rem;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.8rem;
    transition: var(--transition);
    border: 1px solid transparent;
}

.link-list li a:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateX(4px);
}

.expand-btn {
    margin-top: auto;
    padding: 0.65rem 1.35rem;
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.72rem;
    width: fit-content;
}

.tool-card.active .expand-btn {
    background-color: var(--primary-color);
    color: white;
    content: "Schließen"; /* We'll handle text change in JS */
}

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

/* Footer */
.main-footer {
    background-color: #fff;
    border-top: 1px solid #eee;
    padding: 3rem 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 1200px) {
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }

    .tool-card {
        min-height: 315px;
    }

    .hero-section {
        padding: 6rem 0 3rem;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem 1.5rem;
    }
}

/* Modal Styling */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
}

.modal-container {
    position: relative;
    background: white;
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.modal.active .modal-container {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-shrink: 0;
}

.modal-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.modal-content {
    color: var(--text-primary);
    line-height: 1.6;
    overflow-y: auto;
    padding-right: 1rem;
}

/* Custom scrollbar for modal content */
.modal-content::-webkit-scrollbar {
    width: 6px;
}

.modal-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

.modal-content h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--text-primary);
}

.modal-content h3:first-child {
    margin-top: 0;
}

.modal-content p {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.modal-content ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.modal-content li {
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.modal-content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.modal-content a:hover {
    text-decoration: underline;
}