/* Plik: style.css - Wersja z dodanym przyciskiem ZAKO 0’1CZ */
:root {
    /* Paleta kolor¨®w */
    --primary-bg-start: #26F0F1;
    --primary-bg-end: #86A5D9;
    --secondary-bg: rgba(44, 62, 80, 0.85);
    --text-color: #ecf0f1;
    --header-color: #ffffff;
    --border-color: rgba(236, 240, 241, 0.2);
    --input-border-color: #7f8c8d;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --input-bg: #34495e;
    --placeholder-color: #95a5a6;
    --btn-delete-bg: #c0392b;
    --btn-delete-hover: #e74c3c;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, var(--primary-bg-start), var(--primary-bg-end));
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

.page-container {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--secondary-bg);
    position: relative;
}

.nav-left, .nav-right {
    flex: 1;
}

.nav-right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.nav-menu {
    flex: 0 1 auto;
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.nav-menu.is-hidden {
    display: none;
}

.nav-item a {
    text-decoration: none;
    color: var(--header-color);
    font-weight: 500;
    font-size: 1.1rem;
    padding: .5rem 1rem;
    border-radius: 5px;
    transition: background-color .3s, color .3s;
}

.nav-item a:hover {
    background-color: var(--accent-color);
    color: var(--header-color);
}

.user-auth-section {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.user-auth-section a, .user-auth-section span {
    font-size: 0.9rem;
    color: var(--text-color);
    text-decoration: none;
}

.user-auth-section a:hover {
    color: var(--accent-color);
}

.hamburger {
    display: none;
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
    z-index: 1001;
    padding: 0;
    margin-left: 1rem;
    color: var(--text-color);
}

.main-container {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#current-set-title {
    display: none;
}

.flashcard-container {
    margin-top: 0;
    perspective: 1000px;
}

.flashcard {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    margin-top: 0;
}

.flashcard-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.flashcard-text {
    font-size: 2rem;
    font-weight: bold;
    color: var(--header-color);
}

.flashcard-translation {
    font-size: 1.5rem;
    color: var(--text-color);
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    width: 100%;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s, visibility 0.2s;
}

.flashcard-translation.is-visible {
    visibility: visible;
    opacity: 1;
}

.hidden {
    display: none;
}

.btn {
    background-color: var(--accent-color);
    color: var(--header-color);
    border: none;
    padding: .8rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color .3s, transform 0.3s;
    margin-top: 2rem;
}

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

.tts-button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.8rem;
    padding: 0;
    color: #bdc3c7;
    transition: color .3s;
}

.tts-button:hover {
    color: var(--accent-color);
}

.options-bar {
    margin-top: 0;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding-top: 1.5rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, .6);
}

.modal-content {
    background-color: var(--input-bg);
    color: var(--text-color);
    margin: 15% auto;
    padding: 25px;
    border: 1px solid var(--border-color);
    width: 80%;
    max-width: 500px;
    border-radius: 15px;
    text-align: left;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.modal h2 {
    margin-top: 0;
    color: var(--header-color);
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}
.close-btn:hover {
    color: var(--header-color);
}

.modal-footer {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 2rem;
}

.modal-footer .btn {
    margin-top: 0;
}

#set-list li a, #edit-set-list li a, #public-set-list li a {
    display: block;
    padding: 12px 8px;
    text-decoration: none;
    color: var(--accent-color);
    border-radius: 4px;
    transition: background-color 0.3s;
    border-bottom: 1px solid var(--border-color);
}

#set-list li:last-child a, #edit-set-list li:last-child a {
    border-bottom: none;
}

#set-list li a:hover, #edit-set-list li a:hover {
    background-color: var(--secondary-bg);
}

input[type="text"],
input[type="password"],
.paste-area,
.edit-input {
    width: 100%;
    padding: 12px;
    margin: 8px 0 16px 0;
    border-radius: 8px;
    border: 2px solid var(--input-border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 1rem;
    box-sizing: border-box;
}

input::placeholder,
textarea::placeholder {
    color: var(--placeholder-color);
}

.drop-zone {
    border: 2px dashed var(--input-border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    color: var(--placeholder-color);
    margin-bottom: 1rem;
    background-color: transparent;
    transition: background-color 0.3s, border-color 0.3s;
}

.drop-zone.drag-over {
    background-color: rgba(52, 152, 219, 0.2);
    border-color: var(--accent-color);
}

.edit-card-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 40vh;
    overflow-y: auto;
}

.edit-card-item {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.edit-view-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.edit-view-footer .btn {
    margin-top: 0;
}


.btn-card-action {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: 5px;
    color: var(--placeholder-color);
    transition: color 0.3s;
}

.btn-card-action:hover {
    color: var(--btn-delete-bg);
}

.btn.btn-delete-set {
    background-color: var(--btn-delete-bg);
}

.btn.btn-delete-set:hover {
    background-color: var(--btn-delete-hover);
}

.drag-handle {
    color: #7f8c8d;
    cursor: grab;
}

.drag-handle:active {
    cursor: grabbing;
}

.study-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 2rem;
}

.study-controls .btn {
    margin-top: 0;
}

footer {
    background-color: var(--secondary-bg);
    color: var(--text-color);
    text-align: center;
    padding: 10px;
    font-size: 0.85rem;
    flex-shrink: 0;
    border-top: 1px solid var(--border-color);
}

/* --- ZMIENIONE STYLE PRZYCISKÓW NAUKI --- */

/* Wspólne style dla wszystkich 3 przycisków */
#swap-lang-btn, #autoplay-btn, #loop-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    border: none;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.3s, box-shadow 0.3s, stroke 0.3s;
    padding: 0;
    margin: 0;
}

/* Domyślny wygląd (niewłączone) */
#swap-lang-btn, #autoplay-btn, #loop-btn {
    background-color: var(--accent-color);
}
#swap-lang-btn svg, #autoplay-btn svg, #loop-btn svg {
    stroke: var(--header-color); /* Biała ikona */
}

/* Wygląd po najechaniu myszką */
#swap-lang-btn:hover, #autoplay-btn:hover, #loop-btn:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 3px 8px rgba(0,0,0,0.3);
}

/* Wygląd włączonych przycisków (aktywne) */
#autoplay-btn.active, #loop-btn.active {
    background-color: var(--header-color); /* Białe tło */
}
#autoplay-btn.active svg, #loop-btn.active svg {
    stroke: var(--accent-color); /* Niebieska ikona */
}

/* Specyficzne dla ikon play/stop */
#autoplay-btn .icon-play, #autoplay-btn .icon-stop,
#loop-btn .icon-play, #loop-btn .icon-stop {
    width: 22px;
    height: 22px;
    fill: none;
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
}
footer a:hover {
    text-decoration: underline;
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 768px) {
    .navbar {
        justify-content: flex-end;
        padding: 1rem;
    }
    
    .nav-left,
    .nav-menu {
        display: none;
    }

    .nav-menu.active {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--secondary-bg);
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 4px 8px rgba(0,0,0,0.3);
        flex-direction: column;
        padding: 0.5rem 0;
        gap: 0;
        z-index: 1000;
    }
    
    body:not(.user-is-logged-in) .hamburger {
        display: none;
    }
    body:not(.user-is-logged-in) .user-auth-section {
        display: flex;
    }
    body.user-is-logged-in .hamburger {
        display: block;
    }
    body.user-is-logged-in .user-auth-section {
        display: flex;
    }

    .nav-item a {
        display: block;
        width: auto;
        text-align: center;
        padding: 0.8rem 1.5rem;
        border-radius: 0;
    }
}

@media (max-width: 600px) {
    .flashcard { height: auto; min-height: 280px; }
    .flashcard-text { font-size: 1.5rem; }
    .flashcard-translation { font-size: 1.2rem; }
    .edit-card-item { flex-direction: column; align-items: stretch; padding-right: 1rem; position: relative; }
    .edit-input { width: 100%; box-sizing: border-box; }
    .btn-delete-card { position: absolute; top: 50%; right: -10px; transform: translateY(-50%); }
    .user-auth-section { font-size: 0.8rem; }
}

/* --- Style dla funkcji podglądu zestawu --- */

/* Modyfikacja listy zestawów, aby pomieścić przycisk */
#set-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* Nie usuwamy dolnej granicy z samego <li>, tylko z linku <a> */
}

#set-list li a {
    border-bottom: none; /* Usuwamy powielającą się linię z linku */
    flex-grow: 1; /* Link zajmuje dostępną przestrzeń */
}

/* Styl dla nowego przycisku "Podgląd" */
.preview-btn {
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 1rem;
    white-space: nowrap;
    font-size: 0.8rem;
    transition: background-color 0.3s, color 0.3s;
}
.preview-btn:hover {
    background-color: var(--accent-color);
    color: var(--header-color);
}

/* Styl dla zawartości okna podglądu */
#preview-content {
    margin-top: 1.5rem;
    max-height: 60vh; /* Ograniczenie wysokości dla długich zestawów */
    overflow-y: auto; /* Dodanie paska przewijania w razie potrzeby */
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.preview-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 4px;
    border-bottom: 1px solid var(--border-color);
}
.preview-row:last-child {
    border-bottom: none;
}
.preview-row:nth-child(even) { /* Dodaje "efekt zebry" dla czytelności */
    background-color: rgba(0, 0, 0, 0.15);
}

.preview-term, .preview-definition {
    width: 48%; /* Dwie równe kolumny */
    text-align: left;
    word-break: break-word; /* Zapewnia łamanie długich słów */
}

/* Klasa pomocnicza do chwilowego wyłączania animacji */
.no-transition {
    transition: none !important;
}