/* Tamsi Duolingo stiliaus tema */
:root {
    --bg: #131f24;
    --card: #202f36;
    --border: #37464f;
    --dim: #52656d;
    --text: #f1f7fb;
    --blue: #49c0f8;
    --blue-dark: #1899d6;
    --green: #58cc02;
    --red: #ff4b4b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Nunito", "Segoe UI", system-ui, sans-serif;
    font-size: 17px;
    line-height: 1.5;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 16px 16px 64px;
}

h1 { font-size: 1.6rem; font-weight: 800; }
h2 { font-size: 1.2rem; font-weight: 800; }

a { color: var(--blue); text-decoration: none; }

/* Navigacija */
.topnav {
    display: flex;
    gap: 4px;
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
    max-width: 640px;
    margin: 0 auto;
}
.topnav a {
    padding: 8px 12px;
    border-radius: 12px;
    color: var(--dim);
    font-weight: 700;
}
.topnav a.active { color: var(--blue); background: rgba(73, 192, 248, .08); }
.topnav a:hover { color: var(--text); }
.topnav .nav-icon,
.topnav .nav-right {
    display: flex;
    align-items: center;
}
.topnav .nav-right { margin-left: auto; }

/* Formos */
input[type=text], input[type=password], input[type=search] {
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    border: 2px solid var(--border);
    background: var(--card);
    color: var(--text);
    font-size: 1.05rem;
    font-family: inherit;
    outline: none;
}
input:focus { border-color: var(--blue-dark); }

.btn {
    display: inline-block;
    width: 100%;
    padding: 14px 16px;
    margin-top: 12px;
    border-radius: 14px;
    border: 0;
    font-size: 1rem;
    font-weight: 800;
    font-family: inherit;
    letter-spacing: .06em;
    text-transform: uppercase;
    cursor: pointer;
    text-align: center;
}
.btn-primary { background: var(--blue-dark); color: #fff; }
.btn-primary:hover { background: var(--blue); }
.btn-secondary { background: var(--card); color: var(--blue); border: 2px solid var(--border); }
.btn-secondary:hover { border-color: var(--blue-dark); }
.btn:disabled { background: var(--card); color: var(--dim); cursor: default; }

.notice {
    padding: 12px 16px;
    border-radius: 14px;
    background: var(--card);
    border: 2px solid var(--border);
}
.notice.error { border-color: var(--red); color: var(--red); }

/* Prisijungimo langas */
.auth-wrap {
    max-width: 360px;
    margin: 18vh auto 0;
    padding: 0 16px;
    text-align: center;
}
.auth-wrap input { margin-bottom: 4px; }

/* Žodžio kortelė */
.word-card {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 18px;
    margin: 14px 0;
}
.word-card .jp {
    font-size: 2rem;
    font-weight: 700;
}
.word-card .kanji { color: var(--dim); font-size: 1.2rem; margin-left: 10px; }
.word-card .romaji { color: var(--blue); font-weight: 700; }
.word-card .row { margin-top: 8px; }
.word-card .label {
    color: var(--dim);
    font-size: .78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .08em;
}
.word-card .assoc { font-style: italic; }
.word-card .meta { color: var(--dim); font-size: .85rem; margin-top: 10px; }

.counter-badge {
    display: inline-block;
    min-width: 28px;
    padding: 2px 9px;
    border-radius: 999px;
    background: var(--border);
    color: var(--text);
    font-weight: 800;
    font-size: .9rem;
    text-align: center;
}
.counter-badge.hot { background: var(--red); }

/* Quiz */
.quiz-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 20px;
}
.quiz-card {
    background: var(--bg);
    border: 2px solid var(--border);
    border-bottom-width: 4px;
    border-radius: 16px;
    padding: 16px 10px;
    min-height: 86px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-weight: 700;
    font-size: 1.05rem;
    cursor: pointer;
    user-select: none;
    transition: border-color .12s, background .12s, opacity .2s;
}
.quiz-card .ruby {
    color: var(--dim);
    font-size: .78rem;
    letter-spacing: .35em;
    margin-bottom: 2px;
}
.quiz-card .kana-txt { font-size: 1.35rem; }
.quiz-card.selected {
    border-color: var(--blue-dark);
    background: rgba(24, 153, 214, .12);
    color: var(--blue);
}
.quiz-card.selected .ruby, .quiz-card.selected .kana-txt { color: var(--blue); }
.quiz-card.done {
    opacity: .35;
    pointer-events: none;
}
.quiz-card.correct {
    border-color: var(--green);
    background: rgba(88, 204, 2, .12);
    color: var(--green);
    pointer-events: none;
}
.quiz-card.correct .ruby, .quiz-card.correct .kana-txt { color: var(--green); }
.quiz-card.wrong {
    border-color: var(--red);
    background: rgba(255, 75, 75, .12);
    animation: shake .3s;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.mode-switch { display: flex; gap: 8px; }
.mode-switch button {
    flex: 1;
    padding: 10px;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--card);
    color: var(--dim);
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
}
.mode-switch button.on { color: var(--blue); border-color: var(--blue-dark); }

/* Modalas su paaiškinimu po klaidos */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    z-index: 50;
}
.modal {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 18px;
    padding: 20px;
    max-width: 480px;
    width: 100%;
    max-height: 85vh;
    overflow: auto;
}
.modal h2 { margin-top: 0; color: var(--red); }
.hidden { display: none; }

/* Žodžių sąrašas */
.search-row { margin-bottom: 14px; }
.list-empty { color: var(--dim); text-align: center; margin-top: 40px; }

/* Kortelės redagavimas */
.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
}
.card-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.icon-btn {
    background: none;
    border: 0;
    padding: 4px;
    color: var(--dim);
    cursor: pointer;
    display: flex;
    align-items: center;
}
.icon-btn:hover { color: var(--blue); }

.card-edit label {
    display: block;
    margin-top: 10px;
    color: var(--dim);
    font-size: .78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .08em;
}
.card-edit input, .card-edit textarea {
    display: block;
    width: 100%;
    margin-top: 4px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    resize: vertical;
}
.card-edit input:focus, .card-edit textarea:focus { border-color: var(--blue-dark); }
.card-edit textarea {
    min-height: 6.5em;
    line-height: 1.45;
    overflow: hidden;
}
.edit-actions { display: flex; gap: 10px; }
.edit-actions .btn { margin-top: 14px; }

/* Rašymo quiz */
.prompt-card {
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 24px 18px;
    margin: 20px 0 16px;
    text-align: center;
}
.prompt-card .label {
    color: var(--dim);
    font-size: .78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .08em;
}
.prompt-word { font-size: 1.7rem; font-weight: 800; margin-top: 4px; }
.kana-preview {
    min-height: 2.2rem;
    margin-top: 8px;
    text-align: center;
    font-size: 1.5rem;
    color: var(--blue);
}
.result-heading {
    font-size: 1.3rem;
    font-weight: 800;
    text-align: center;
    margin: 18px 0 6px;
}
.result-heading.good { color: var(--green); }
.result-heading.bad { color: var(--red); }

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--blue);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }