/* ============================================
   DIGITALES SCHUL-HANDBUCH - MAIN STYLESHEET
   Design: Clean, Koreanisch inspiriert, Studyblr
   ============================================ */

/* ---------- CSS VARIABLEN ---------- */
:root {
    /* Farbpalette */
    --cremeweiss: #FFFDF8;
    --pastellrosa: #FFD9E8;
    --rose: #F7C9D9;
    --salbeigruen: #D6E7D5;
    --hellgruen: #EAF5EA;
    --text-dunkel: #444444;
    --weiss: #FFFFFF;
    
    /* Schatten */
    --shadow-sanft: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-mittel: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-karte: 0 2px 12px rgba(0, 0, 0, 0.05);
    
    /* Abstände & Rundungen */
    --border-radius: 16px;
    --border-radius-klein: 10px;
    --spacing-seite: 2rem;
    --max-breite: 1200px;
    
    /* Schrift */
    --schrift-familie: 'Segoe UI', 'Noto Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Animationen */
    --transition-schnell: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* ---------- RESET & GRUNDEINSTELLUNGEN ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--schrift-familie);
    background-color: var(--cremeweiss);
    color: var(--text-dunkel);
    line-height: 1.6;
    min-height: 100vh;
    /* Blumenmuster-Hintergrund - dezent */
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 217, 232, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(214, 231, 213, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(234, 245, 234, 0.2) 0%, transparent 70%);
    background-attachment: fixed;
}

/* ---------- BLUMEN-DEKORATION ---------- */
.blumen-deko {
    position: fixed;
    pointer-events: none;
    z-index: 0;
    opacity: 0.15;
    font-size: 3rem;
}

.blumen-deko-oben-links {
    top: 5%;
    left: 3%;
    transform: rotate(-15deg);
}

.blumen-deko-oben-rechts {
    top: 8%;
    right: 5%;
    transform: rotate(20deg);
}

.blumen-deko-unten-links {
    bottom: 10%;
    left: 5%;
    transform: rotate(10deg);
}

.blumen-deko-unten-rechts {
    bottom: 8%;
    right: 3%;
    transform: rotate(-25deg);
}

/* ---------- NAVIGATION ---------- */
.haupt-navigation {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 253, 248, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--pastellrosa);
    padding: 1rem var(--spacing-seite);
    box-shadow: var(--shadow-sanft);
}

.nav-container {
    max-width: var(--max-breite);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dunkel);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo span {
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dunkel);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-klein);
    font-size: 0.9rem;
    transition: all var(--transition-schnell);
    white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.aktiv {
    background-color: var(--pastellrosa);
    color: var(--text-dunkel);
}

/* ---------- HAUPTLAYOUT ---------- */
.seiten-container {
    max-width: var(--max-breite);
    margin: 0 auto;
    padding: var(--spacing-seite);
    position: relative;
    z-index: 1;
}

/* ---------- HEADER ---------- */
.seiten-header {
    text-align: center;
    padding: 3rem 1rem 2rem;
    position: relative;
}

.seiten-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dunkel);
}

.seiten-header p {
    font-size: 1.1rem;
    color: #777;
    max-width: 600px;
    margin: 0 auto;
}

/* Blumendeko im Header */
.seiten-header::before {
    content: '🌸';
    position: absolute;
    left: 15%;
    top: 30%;
    font-size: 2rem;
    opacity: 0.4;
}

.seiten-header::after {
    content: '🌿';
    position: absolute;
    right: 15%;
    top: 30%;
    font-size: 2rem;
    opacity: 0.4;
}

/* ---------- KARTEN ---------- */
.karte {
    background: var(--weiss);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-karte);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.karte:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-mittel);
    border-color: var(--pastellrosa);
}

.karte-titel {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.karte-titel .icon {
    font-size: 1.4rem;
}

/* ---------- GRID-LAYOUTS ---------- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.2rem;
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius-klein);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-schnell);
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
    font-family: inherit;
}

.btn-primar {
    background-color: var(--pastellrosa);
    color: var(--text-dunkel);
}

.btn-primar:hover {
    background-color: var(--rose);
    transform: translateY(-2px);
}

.btn-sekundar {
    background-color: var(--salbeigruen);
    color: var(--text-dunkel);
}

.btn-sekundar:hover {
    background-color: #c5d9c4;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--pastellrosa);
    color: var(--text-dunkel);
}

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

/* ---------- SUCHFELD ---------- */
.suchfeld-container {
    position: relative;
    margin: 1.5rem 0;
}

.suchfeld {
    width: 100%;
    padding: 1rem 1.2rem 1rem 3rem;
    border: 2px solid var(--salbeigruen);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--weiss);
    transition: all var(--transition-normal);
    color: var(--text-dunkel);
}

.suchfeld:focus {
    outline: none;
    border-color: var(--rose);
    box-shadow: 0 0 0 3px rgba(247, 201, 217, 0.2);
}

.suchfeld-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    opacity: 0.5;
}

/* ---------- TO-DO LISTE ---------- */
.todo-liste {
    list-style: none;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid #f5f5f5;
    transition: all var(--transition-schnell);
}

.todo-item:last-child {
    border-bottom: none;
}

.todo-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--salbeigruen);
    border-radius: 6px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: all var(--transition-schnell);
    flex-shrink: 0;
}

.todo-checkbox:checked {
    background-color: var(--salbeigruen);
    border-color: var(--salbeigruen);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: 12px;
    background-position: center;
    background-repeat: no-repeat;
}

.todo-checkbox:checked + .todo-text {
    text-decoration: line-through;
    opacity: 0.5;
}

.todo-text {
    flex-grow: 1;
    cursor: pointer;
}

/* ---------- FORTSCHRITTSBALKEN ---------- */
.fortschritt-container {
    margin: 1rem 0;
}

.fortschritt-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.fortschritt-balken {
    width: 100%;
    height: 12px;
    background-color: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
}

.fortschritt-fuellung {
    height: 100%;
    background: linear-gradient(90deg, var(--salbeigruen), var(--pastellrosa));
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* ---------- ZITAT ---------- */
.zitat-karte {
    text-align: center;
    padding: 2rem;
    position: relative;
}

.zitat-text {
    font-size: 1.2rem;
    font-style: italic;
    color: #666;
    line-height: 1.8;
}

.zitat-text::before {
    content: '"';
    font-size: 3rem;
    color: var(--pastellrosa);
    position: absolute;
    left: 1rem;
    top: -0.5rem;
    font-family: serif;
    opacity: 0.6;
}

.zitat-autor {
    margin-top: 0.8rem;
    font-size: 0.9rem;
    color: #999;
}

/* ---------- NOTIZFELD ---------- */
.notiz-textarea {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 2px solid #eee;
    border-radius: var(--border-radius-klein);
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    transition: all var(--transition-normal);
    background: var(--weiss);
    color: var(--text-dunkel);
}

.notiz-textarea:focus {
    outline: none;
    border-color: var(--pastellrosa);
    box-shadow: 0 0 0 3px rgba(255, 217, 232, 0.2);
}

/* ---------- SCHNELLZUGRIFFE ---------- */
.schnellzugriff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.schnellzugriff-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.2rem 1rem;
    background: var(--weiss);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-dunkel);
    box-shadow: var(--shadow-sanft);
    transition: all var(--transition-normal);
    text-align: center;
}

.schnellzugriff-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-mittel);
    background: var(--hellgruen);
}

.schnellzugriff-item .icon {
    font-size: 2rem;
}

.schnellzugriff-item .label {
    font-size: 0.85rem;
    font-weight: 500;
}

/* ---------- INFOBOXEN ---------- */
.info-box {
    padding: 1.2rem 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    position: relative;
    padding-left: 3.5rem;
}

.info-box::before {
    position: absolute;
    left: 1rem;
    top: 1.2rem;
    font-size: 1.4rem;
}

.info-box-tipp {
    background-color: #f0f9f0;
    border-left: 4px solid var(--salbeigruen);
}

.info-box-tipp::before {
    content: '💡';
}

.info-box-warnung {
    background-color: #fff5f5;
    border-left: 4px solid #ffb3b3;
}

.info-box-warnung::before {
    content: '⚠️';
}

.info-box-info {
    background-color: #f5f0ff;
    border-left: 4px solid #c4b5fd;
}

.info-box-info::before {
    content: '📋';
}

.info-box-erfolg {
    background-color: #f0fff4;
    border-left: 4px solid #86efac;
}

.info-box-erfolg::before {
    content: '✅';
}

/* ---------- TABELLEN ---------- */
.tabelle-container {
    overflow-x: auto;
    margin: 1.5rem 0;
}

.tabelle {
    width: 100%;
    border-collapse: collapse;
    background: var(--weiss);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sanft);
}

.tabelle th {
    background-color: var(--pastellrosa);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.tabelle td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid #f5f5f5;
    font-size: 0.95rem;
}

.tabelle tr:hover td {
    background-color: var(--hellgruen);
}

.tabelle tr:last-child td {
    border-bottom: none;
}

/* ---------- CHECKLISTEN ---------- */
.checkliste {
    list-style: none;
    padding: 0;
}

.checkliste li {
    padding: 0.6rem 0;
    padding-left: 2rem;
    position: relative;
    border-bottom: 1px solid #f5f5f5;
}

.checkliste li::before {
    content: '☐';
    position: absolute;
    left: 0;
    color: var(--salbeigruen);
    font-size: 1.1rem;
}

.checkliste li.erledigt::before {
    content: '☑';
    color: var(--rose);
}

/* ---------- SCHRITT-FÜR-SCHRITT ---------- */
.schritte {
    counter-reset: schritt;
    list-style: none;
    padding: 0;
}

.schritte li {
    counter-increment: schritt;
    padding: 1rem 1rem 1rem 3.5rem;
    position: relative;
    margin-bottom: 0.8rem;
    background: var(--weiss);
    border-radius: var(--border-radius-klein);
    box-shadow: var(--shadow-sanft);
}

.schritte li::before {
    content: counter(schritt);
    position: absolute;
    left: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background: var(--pastellrosa);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

/* ---------- FOOTER ---------- */
.seiten-footer {
    text-align: center;
    padding: 2rem;
    color: #999;
    font-size: 0.85rem;
    border-top: 1px solid #eee;
    margin-top: 3rem;
}

/* ---------- ANIMATIONEN ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-einblenden {
    animation: fadeInUp 0.6s ease forwards;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
    .seiten-container {
        padding: 1rem;
    }
    
    .seiten-header h1 {
        font-size: 1.8rem;
    }
    
    .nav-container {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-links {
        justify-content: center;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .schnellzugriff-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ---------- AKZENTFARBEN FÜR SEITEN ---------- */
.seite-hp .karte:hover { border-color: var(--pastellrosa); }
.seite-windows .karte:hover { border-color: var(--salbeigruen); }
.seite-goodnotes .karte:hover { border-color: var(--rose); }
.seite-apps .karte:hover { border-color: var(--hellgruen); }
.seite-ki .karte:hover { border-color: var(--pastellrosa); }
.seite-lernen .karte:hover { border-color: var(--salbeigruen); }

/* ---------- DRUCKBAR (für später) ---------- */
@media print {
    .haupt-navigation,
    .blumen-deko,
    .btn {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .karte {
        box-shadow: none;
        border: 1px solid #eee;
        break-inside: avoid;
    }
}