/* ============================================================
   wohngeld-düsseldorf.de — Professional Design System
   ============================================================ */

:root {
    --primary: #1a3a5c;
    --primary-light: #264d7a;
    --primary-dark: #0f2540;
    --accent: #d4a843;
    --accent-hover: #c49630;
    --accent-light: #f0d68a;
    --text: #2d2d2d;
    --text-light: #5a5a5a;
    --text-muted: #767676;
    --bg-light: #f7f8fa;
    --bg-white: #ffffff;
    --bg-accent: #fdf6e8;
    --border: #e0e3e8;
    --success: #2d7d46;
    --focus-outline: 3px solid #d4a843;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    --transition: 0.2s ease;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: var(--text);
    background-color: var(--bg-white);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    z-index: 100;
    transition: top 0.3s;
    font-weight: 600;
    border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
    top: 0;
    outline: var(--focus-outline);
}

/* ===== Header ===== */
header {
    background: var(--bg-white);
    border-bottom: 2px solid var(--primary);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    gap: 1.5rem;
    padding: 0.6rem 0;
}

.logo {
    margin-right: auto;
    flex-shrink: 0;
}

.logo a {
    text-decoration: none;
    color: var(--primary);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo a strong {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Menu Toggle (Hamburger) */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1100;
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text);
    position: relative;
    transition: background 0.3s;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background: var(--text);
    left: 0;
    transition: transform 0.3s;
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.menu-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg) translate(5px, 6px);
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* Nav Links & Submenu */
.nav-links {
    list-style: none;
    display: flex;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
}

.nav-links li {
    position: relative;
}

.nav-links a,
.submenu-toggle {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    display: block;
    background: none;
    border: none;
    font-size: 0.95rem;
    cursor: pointer;
    font-family: inherit;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition);
}

.nav-links a:hover,
.submenu-toggle:hover {
    color: var(--primary);
    background: var(--bg-light);
}

.has-submenu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.arrow {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 2px;
    vertical-align: middle;
    border-top: 4px solid;
    border-right: 4px solid transparent;
    border-left: 4px solid transparent;
    transition: transform 0.3s;
}

.submenu-toggle[aria-expanded="true"] .arrow {
    transform: rotate(180deg);
}

/* Desktop Submenu */
@media (min-width: 1025px) {
    .submenu {
        position: absolute;
        top: 100%;
        left: 0;
        background: var(--bg-white);
        border: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        list-style: none;
        padding: 0.5rem 0;
        margin: 0.25rem 0 0 0;
        min-width: 260px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(8px);
        transition: all var(--transition);
        z-index: 1000;
        border-radius: var(--radius);
    }

    .nav-links li:hover > .submenu,
    .nav-links li:focus-within > .submenu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .submenu li a {
        padding: 0.6rem 1rem;
        font-weight: 500;
        font-size: 0.9rem;
        border-radius: 0;
    }

    .submenu li a:hover {
        background: var(--bg-light);
        color: var(--primary);
    }
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.language-switcher select {
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    font-size: 0.9rem;
    cursor: pointer;
    background: var(--bg-white);
    color: var(--text);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235a5a5a' fill='none' stroke-width='2'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary-dark) 100%);
    color: white;
    padding: 3.5rem 0;
}

.hero-content {
    max-width: 750px;
}

.hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    margin: 0 0 0.5rem 0;
    line-height: 1.2;
    color: white;
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 400;
    margin: 0 0 1.2rem 0;
    opacity: 0.9;
    color: var(--accent-light);
}

.hero-intro {
    font-size: 1.05rem;
    line-height: 1.7;
    margin: 0 0 0.8rem 0;
    opacity: 0.95;
    max-width: 650px;
}

/* ===== CTA Buttons ===== */
.cta-button {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark) !important;
    font-weight: 700;
    font-size: 1.05rem;
    padding: 0.85rem 2rem;
    border-radius: var(--radius);
    text-decoration: none;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 2px 8px rgba(212, 168, 67, 0.3);
    border: none;
    cursor: pointer;
    text-align: center;
}

.cta-button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(212, 168, 67, 0.4);
}

.cta-hero {
    margin-top: 1.5rem;
    font-size: 1.1rem;
    padding: 0.95rem 2.4rem;
}

.cta-large {
    font-size: 1.15rem;
    padding: 1rem 2.8rem;
}

.cta-center {
    text-align: center;
    margin-top: 2rem;
}

/* ===== Key Facts ===== */
.key-facts {
    background: var(--bg-accent);
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
}

.key-facts h2 {
    font-size: 1.3rem;
    color: var(--primary);
    margin: 0 0 1rem 0;
}

.facts-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
}

.facts-list li {
    position: relative;
    padding-left: 1.8rem;
    font-size: 0.95rem;
    color: var(--text);
}

.facts-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
    font-size: 1.1rem;
}

/* ===== Quick Guide Steps ===== */
.quick-guide {
    padding: 3.5rem 0;
    background: var(--bg-white);
}

.quick-guide h2 {
    text-align: center;
    font-size: 1.8rem;
    color: var(--primary);
    margin: 0 0 2.5rem 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.step-card {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--bg-light);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: box-shadow var(--transition);
}

.step-card:hover {
    box-shadow: var(--shadow);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.8rem;
    font-weight: 700;
    font-size: 1.1rem;
}

.step-card h3 {
    font-size: 1rem;
    color: var(--primary);
    margin: 0 0 0.5rem 0;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0;
    line-height: 1.5;
}

/* ===== Topics Grid ===== */
.topics-overview {
    padding: 3.5rem 0;
    background: var(--bg-light);
}

.topics-overview h2 {
    text-align: center;
    font-size: 1.8rem;
    color: var(--primary);
    margin: 0 0 2.5rem 0;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.topic-card {
    display: block;
    text-decoration: none;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.topic-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--accent);
}

.topic-card h3 {
    font-size: 1.2rem;
    color: var(--primary);
    margin: 0 0 0.5rem 0;
}

.topic-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    margin: 0 0 0.8rem 0;
    line-height: 1.5;
}

.topic-link {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 600;
}

/* ===== CTA Footer Section ===== */
.cta-footer-section {
    padding: 3.5rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta-footer-section h2 {
    font-size: 1.8rem;
    margin: 0 0 0.8rem 0;
    color: white;
}

.cta-footer-section p {
    font-size: 1.05rem;
    margin: 0 0 1.5rem 0;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-footer-section .cta-button {
    color: var(--primary-dark) !important;
}

/* ===== Main Content ===== */
main {
    flex: 1;
}

main > .container {
    padding: 2rem 0 3rem;
}

main h1 {
    font-size: 2rem;
    color: var(--primary);
    margin: 0 0 1rem 0;
    line-height: 1.3;
}

main h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin: 2rem 0 1rem 0;
}

main h3 {
    font-size: 1.2rem;
    color: var(--text);
    margin: 1.5rem 0 0.75rem 0;
}

main p {
    margin: 0 0 1rem 0;
    line-height: 1.7;
}

main ul, main ol {
    margin: 0 0 1.5rem 0;
    padding-left: 1.5rem;
}

main li {
    margin-bottom: 0.5rem;
}

main table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

main table th,
main table td {
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--border);
    text-align: left;
}

main table th {
    background: var(--primary);
    color: white;
    font-weight: 600;
}

main table tr:nth-child(even) {
    background: var(--bg-light);
}

main table tr:hover {
    background: var(--bg-accent);
}

/* ===== Page Sections (used in content pages) ===== */
.content-section {
    margin-bottom: 2.5rem;
}

.content-section h2 {
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.info-box {
    background: var(--bg-accent);
    border-left: 4px solid var(--accent);
    padding: 1.2rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.info-box p {
    margin: 0;
}

.warning-box {
    background: #fef3e2;
    border-left: 4px solid #e67e22;
    padding: 1.2rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.checklist {
    list-style: none;
    padding: 0;
}

.checklist li {
    padding: 0.6rem 0 0.6rem 2rem;
    position: relative;
    border-bottom: 1px solid var(--border);
}

.checklist li::before {
    content: "☐";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-size: 1.1rem;
}

/* ===== FAQ Accordion ===== */
.faq-section {
    margin: 2rem 0;
}

.faq-category {
    margin-bottom: 2.5rem;
}

.faq-category h2 {
    color: var(--primary);
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: var(--bg-white);
    border: none;
    padding: 1rem 1.25rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
    transition: background var(--transition);
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question[aria-expanded="true"] {
    background: var(--bg-accent);
    color: var(--primary);
}

.faq-icon {
    font-size: 1.5rem;
    line-height: 1;
    transition: transform var(--transition);
    color: var(--accent);
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.25rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-answer.is-open {
    max-height: 2000px;
    padding: 0 1.25rem 1.25rem;
}

.faq-answer p {
    margin: 0 0 0.75rem 0;
}

/* ===== 404 Page ===== */
.error-404 {
    text-align: center;
    padding: 4rem 0;
}

.error-404 h1 {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.error-404 p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* ===== Footer ===== */
footer {
    background-color: var(--primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-info p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

.footer-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: white;
}

/* ===== Utility ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== Focus Styles ===== */
a:focus, button:focus, select:focus {
    outline: var(--focus-outline);
    outline-offset: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .header-container {
        gap: 1rem;
    }

    .language-switcher {
        margin-left: auto;
    }

    .menu-toggle {
        display: block;
        margin-left: 0.5rem;
    }

    .nav-wrapper {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-white);
        box-shadow: -2px 0 8px rgba(0,0,0,0.15);
        padding: 4.5rem 1.5rem 2rem;
        transition: right 0.3s ease-in-out;
        z-index: 1050;
        overflow-y: auto;
    }

    .nav-wrapper.is-active {
        right: 0;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .has-submenu {
        flex-direction: column;
        align-items: flex-start;
    }

    .submenu {
        list-style: none;
        padding-left: 1.25rem;
        display: none;
        width: 100%;
    }

    .submenu.is-open {
        display: block;
    }

    .submenu li a {
        padding: 0.5rem 0;
    }

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

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

    .facts-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    main h1 {
        font-size: 1.6rem;
    }

    main h2 {
        font-size: 1.3rem;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }

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

    .quick-guide h2,
    .topics-overview h2,
    .cta-footer-section h2 {
        font-size: 1.4rem;
    }

    .cta-button {
        font-size: 0.95rem;
        padding: 0.7rem 1.5rem;
    }
}