/* Główne ustawienia tła */
body {
    background-color: #0D0B14; /* Głęboka czerń/fiolet */
    color: #e0d7f5;
    font-family: 'Segoe UI', Roboto, sans-serif;
    margin: 0;
}

header {
    background-color: #16121E;
    color: #a29bfe; 
    padding: 25px;
    text-align: center;
    border-bottom: 1px solid #3c344d;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

#app-container {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Siatka kafelków */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

/* Styl kafelka - Koniec z jasnym tłem! */
.card {
    background: #16121E;
    padding: 25px;
    border-radius: 16px;
    border: 1px solid #3c344d;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card:hover {
    transform: translateY(-8px);
    border-color: #9d4edd; /* Neonowy fiolet przy hoverze */
    box-shadow: 0 10px 25px rgba(157, 78, 221, 0.2);
}

.card h3 {
    margin: 0 0 15px 0;
    font-size: 1.2rem;
    color: #fff; /* Czysta biel dla tytułu */
}

.card p {
    color: #a29bfe;
    font-size: 0.95rem;
}

/* Przycisk wewnątrz kafelka */
.card button {
    background: #3c344d;
    border: 1px solid #9d4edd;
    color: #fff;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 15px;
    transition: 0.2s;
}

.card button:hover {
    background: #9d4edd;
    box-shadow: 0 0 10px #9d4edd;
}

/* Naprawa widoczności nagłówka przedmiotu (ten co zaznaczyłeś) */
.lesson-view h2 {
    color: #9d4edd; /* Wyrazisty fiolet */
    text-shadow: 0 0 10px rgba(157, 78, 221, 0.5);
    margin-bottom: 30px;
    font-size: 2rem;
    text-align: center;
}

/* Lista lekcji - ciemna i czytelna */
.lesson-list li a {
    display: block;
    background: #16121E;
    color: #e0d7f5;
    padding: 18px;
    margin-bottom: 12px;
    border-radius: 10px;
    text-decoration: none;
    border: 1px solid #3c344d;
    border-left: 4px solid #9d4edd;
    transition: 0.3s;
}

.lesson-list li a:hover {
    background: #251d33;
    transform: scale(1.02);
    border-color: #9d4edd;
}

.back-btn {
    background: #3c344d;
    color: white;
    border: 1px solid #9d4edd;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.3s;
}

.back-btn:hover {
    background: #4a4e69;
}
/* Styl dla przycisków lekcji, które zastąpiły linki */
.lesson-item-btn {
    width: 100%;
    text-align: left;
    display: block;
    background: #16121E;
    color: #e0d7f5;
    padding: 18px;
    margin-bottom: 12px;
    border-radius: 10px;
    border: 1px solid #3c344d;
    border-left: 4px solid #9d4edd;
    cursor: pointer;
    font-size: 1rem;
    transition: 0.3s;
}

.lesson-item-btn:hover {
    background: #251d33;
    transform: scale(1.01);
    border-color: #9d4edd;
}

/* Kontener na samą treść wczytanej notatki */
.note-body {
    background: #1a1625;
    padding: 30px;
    border-radius: 12px;
    margin-top: 20px;
    border: 1px solid #3c344d;
    line-height: 1.6;
}

.note-body h1, .note-body h2 {
    color: #9d4edd;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    background-color: #16121E;
    border: 1px solid #3c344d;
    border-radius: 8px;
    overflow: hidden;
}

table th {
    background-color: #251d33;
    color: #9d4edd;
    border: 1px solid #3c344d;
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

table td {
    border: 1px solid #3c344d;
    padding: 12px;
    color: #e0d7f5;
}

table tr:hover {
    background-color: #1f1a2e;
}
/* Style dedykowane dla diagramu SVG ONZ */
.svg-diagram-container {
    width: 100%;
    overflow-x: auto;
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.onz-svg {
    max-width: 100%;
    height: auto;
    font-family: 'Segoe UI', Roboto, sans-serif;
}

.onz-svg .box {
    fill: #16121E;
    stroke: #3c344d;
    stroke-width: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

/* Efekt najechania na kafelek na schemacie - zgodny z Twoim .card:hover */
.onz-svg .box-group:hover .box {
    stroke: #9d4edd;
    fill: #251d33;
    filter: drop-shadow(0 0 8px rgba(157, 78, 221, 0.4));
}

.onz-svg .text-box {
    font-size: 16px;
    fill: #e0d7f5;
    pointer-events: none; /* Żeby kursor nie "haczył" o tekst przy hoverze */
}

.onz-svg .text-rotated {
    font-size: 20px;
    fill: #fff;
    font-weight: 600;
    pointer-events: none;
}

.onz-svg .line {
    stroke: #9d4edd;
    stroke-width: 2px;
    fill: none;
}

.onz-svg .line-dotted {
    stroke: #9d4edd;
    stroke-width: 2px;
    fill: none;
    stroke-dasharray: 6, 6;
}