/* 
 * China-Studies.com - Hauptstil
 * Erstellt für die Desktop- und Mobile-Version
 */

/* ===== Grundlegende Einstellungen ===== */
:root {
    /* Farbpalette */
    --primary-color: #c32121;       /* Rot (China-Rot) */
    --primary-dark: #9e1a1a;        /* Dunkleres Rot */
    --secondary-color: #2c3e50;     /* Dunkelblau */
    --accent-color: #e67e22;        /* Orange */
    --light-color: #f8f9fa;         /* Hellgrau */
    --dark-color: #343a40;          /* Dunkelgrau */
    --text-color: #333333;          /* Text */
    --border-color: #dee2e6;        /* Rahmen */
    --background-color: #ffffff;    /* Hintergrund */
    --success-color: #28a745;       /* Erfolg */
    --error-color: #dc3545;         /* Fehler */
    
    /* Abstände */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    
    /* Schriftgrößen */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;
    --font-size-huge: 3rem;
    
    /* Schatten */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    
    /* Übergänge */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Abrundung */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    
    /* Container */
    --container-max-width: 1200px;
}

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

html, body {
    height: 100%;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    scroll-behavior: smooth;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

ul, ol {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button, input[type="submit"], input[type="reset"] {
    background: none;
    color: inherit;
    border: none;
    padding: 0;
    font: inherit;
    cursor: pointer;
    outline: inherit;
}

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.site-content {
    min-height: calc(100vh - 180px); /* 100vh - Kopfzeile - Fußzeile */
    padding: var(--spacing-xl) 0;
}

/* ===== Header ===== */
.main-header {
    background-color: var(--background-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 80px;
    display: flex;
    align-items: center;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    padding: var(--spacing-sm) 0;
}

.logo-img {
    height: 50px;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: var(--spacing-lg);
    position: relative;
}

.nav-links a {
    color: var(--secondary-color);
    font-weight: 500;
    transition: color var(--transition-fast);
    display: block;
    padding: var(--spacing-sm) 0;
}

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

/* Dropdown für Benutzermenü */
.user-menu {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    background-color: var(--background-color);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) 0;
    display: none;
    z-index: 10;
}

.user-menu:hover .dropdown {
    display: block;
}

.dropdown li {
    margin: 0;
}

.dropdown a {
    padding: var(--spacing-sm) var(--spacing-md);
    display: block;
}

.dropdown a:hover {
    background-color: var(--light-color);
}

/* Buttons für Login/Registrierung */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-login {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    min-width: 100px;
    padding-left: 15px;
    padding-right: 15px;
}

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

.btn-register {
    background-color: var(--primary-color);
    color: white;
    min-width: 100px;
    padding-left: 15px;
    padding-right: 15px;
}

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

/* St�rkere Regel f�r wei�e Schrift in der Registrieren-Schaltfl�che */
.btn-register, a.btn-register {
    color: white !important;
}

/* Sprachumschalter */
.language-switcher {
    position: relative;
    margin-left: var(--spacing-xl);
}

.current-lang {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.lang-code {
    font-weight: bold;
    color: var(--secondary-color);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 120px;
    background-color: var(--background-color);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) 0;
    display: none;
    z-index: 10;
}

.language-switcher:hover .lang-dropdown {
    display: block;
}

.lang-dropdown li {
    margin: 0;
}

.lang-dropdown a {
    padding: var(--spacing-sm) var(--spacing-md);
    display: block;
    color: var(--text-color);
}

.lang-dropdown a:hover {
    background-color: var(--light-color);
}

/* Mobiles Menü */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
}

.menu-toggle .bar {
    height: 3px;
    width: 100%;
    background-color: var(--secondary-color);
    border-radius: 3px;
}

/* ===== Footer ===== */
.site-footer {
    background-color: var(--secondary-color);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    flex: 0 0 200px;
    margin-bottom: var(--spacing-lg);
}

.footer-logo-img {
    max-height: 50px;
}

.footer-columns {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.footer-column {
    flex: 0 0 30%;
    margin-bottom: var(--spacing-lg);
}

.footer-column h3 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.footer-links li, .footer-contact li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a, .footer-contact a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

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

.social-icons {
    margin-top: var(--spacing-md);
    display: flex;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    margin-right: var(--spacing-sm);
    color: white;
    transition: background-color var(--transition-fast);
}

.social-icon:hover {
    background-color: var(--primary-color);
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.copyright {
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
}

.footer-legal li {
    margin-left: var(--spacing-lg);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

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

/* ===== Allgemeine Komponenten ===== */

/* Seitentitel */
.page-title {
    font-size: var(--font-size-xxl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    font-weight: 500;
}

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    font-weight: 500;
}

.btn-secondary:hover {
    background-color: #1a2530;
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    font-weight: 500;
}

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

/* Tags */
.tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    margin-right: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.field-tag {
    background-color: rgba(44, 62, 80, 0.1);
    color: var(--secondary-color);
}

.language-tag {
    background-color: rgba(230, 126, 34, 0.1);
    color: var(--accent-color);
}

/* Formulare */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.form-row .form-group {
    flex: 1;
    padding: 0 10px;
    min-width: 200px;
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.required {
    color: var(--error-color);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="file"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--background-color);
    transition: border-color var(--transition-fast);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

textarea {
    resize: vertical;
}

.checkbox-label {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    margin-right: var(--spacing-sm);
}

.form-actions {
    margin-top: var(--spacing-xl);
}

/* Fehlermeldungen */
.error-message {
    color: var(--error-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* Erfolgsmeldungen */
.success-message {
    color: var(--success-color);
    background-color: rgba(40, 167, 69, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--success-color);
}
/* ===== Startseite Stile ===== */
.home-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-section {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.hero-section h1 {
    font-size: var(--font-size-huge);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.hero-section .subtitle {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

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

.feature {
    background-color: var(--light-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    text-align: center;
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.feature h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.statistics-section {
    display: flex;
    justify-content: space-around;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius-md);
}

.stat {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: var(--font-size-huge);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.search-preview {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.search-preview h2 {
    font-size: var(--font-size-xxl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.search-preview p {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.search-form-preview {
    display: flex;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.search-form-preview .form-group {
    flex: 1;
    margin-bottom: 0;
    margin-right: var(--spacing-sm);
}

.search-form-preview .form-control {
    height: 48px;
}

.advanced-search {
    font-size: var(--font-size-sm);
}

.latest-scholars {
    margin-bottom: var(--spacing-xl);
}

.latest-scholars h2 {
    font-size: var(--font-size-xxl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.scholar-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.scholar-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
}

.scholar-avatar {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.scholar-avatar img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
}

.scholar-info {
    text-align: center;
}

.scholar-info h3 {
    font-size: var(--font-size-lg);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.scholar-info .institution {
    font-style: italic;
    margin-bottom: var(--spacing-xs);
    color: var(--secondary-color);
}

.scholar-info .research {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.no-scholars {
    text-align: center;
    padding: var(--spacing-lg);
    font-style: italic;
    color: var(--text-color);
}

.view-all {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* Responsive Stile für die Startseite */
@media screen and (max-width: 992px) {
    .features-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scholar-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section .subtitle {
        font-size: var(--font-size-lg);
    }
    
    .features-section {
        grid-template-columns: 1fr;
    }
    
    .statistics-section {
        flex-direction: column;
        gap: var(--spacing-lg);
        padding: var(--spacing-lg);
    }
    
    .search-form-preview {
        flex-direction: column;
    }
    
    .search-form-preview .form-group {
        margin-right: 0;
        margin-bottom: var(--spacing-sm);
    }
    
    .scholar-cards {
        grid-template-columns: 1fr;
    }
}

/* ===== Register Tabs ===== */
.register-tabs {
    margin-bottom: var(--spacing-xl);
}

.register-tab-header {
    display: flex;
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--light-color);
    border: 1px solid var(--border-color);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.tab-btn:first-child {
    border-top-left-radius: var(--border-radius-md);
    border-bottom-left-radius: var(--border-radius-md);
}

.tab-btn:last-child {
    border-top-right-radius: var(--border-radius-md);
    border-bottom-right-radius: var(--border-radius-md);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}


/* Form label improvements */
form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary-color);
    font-size: var(--font-size-md);
}

.form-group {
    margin-bottom: 20px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
select,
textarea {
    display: block;
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: #fff;
    font-size: var(--font-size-md);
    transition: border-color 0.3s ease;
}

.contact-method {
    margin-bottom: 20px;
}

.contact-method h3 {
    margin-top: 10px;
    margin-bottom: 5px;
}

.footer-about-heading {
    font-size: var(--font-size-lg);
    margin-bottom: 10px;
}

.footer-logo-img {
    max-height: 40px;
    filter: brightness(0) invert(1);
}

/* Form label improvements */
form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary-color);
    font-size: var(--font-size-md);
}

.form-group {
    margin-bottom: 20px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
select,
textarea {
    display: block;
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: #fff;
    font-size: var(--font-size-md);
    transition: border-color 0.3s ease;
}

.contact-method {
    margin-bottom: 20px;
}

.contact-method h3 {
    margin-top: 10px;
    margin-bottom: 5px;
}

.footer-about-heading {
    font-size: var(--font-size-lg);
    margin-bottom: 10px;
}

.footer-logo-img {
    max-height: 40px;
    filter: brightness(0) invert(1);
}

/* ===== Anklickbare Kompetenz-Tags ===== */
.clickable-tag {
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.clickable-tag:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.clickable-tag:active {
    transform: translateY(0);
}

/* Hover-Effekt für bessere Benutzerführung */
.clickable-tag::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid transparent;
    border-radius: inherit;
    transition: border-color var(--transition-fast);
}

.clickable-tag:hover::after {
    border-color: var(--primary-color);
}

/* Sicherstellen, dass der Text bei Hover lesbar bleibt */
.field-tag.clickable-tag:hover {
    color: white !important;
}

/* Zusätzlicher visueller Hinweis durch Icon */
.clickable-tag:hover::before {
    content: '🔍 ';
    font-size: 0.8em;
}


/* ===== Footer Kontakt Stile ===== */
.footer-contact .contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact .contact-item i {
    width: 20px;
    margin-right: var(--spacing-sm);
    margin-top: 2px;
    flex-shrink: 0;
}

.footer-contact .contact-item a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-contact .contact-item a:hover {
    color: white;
}

.footer-contact .address {
    line-height: 1.4;
}

/* Responsive Footer Kontakt */
@media screen and (max-width: 768px) {
    .footer-contact .contact-item {
        flex-direction: column;
        margin-bottom: var(--spacing-md);
    }
    
    .footer-contact .contact-item i {
        margin-bottom: var(--spacing-xs);
        margin-right: 0;
    }
}