/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    padding: .55rem 1.25rem;
    border: none;
    border-radius: var(--radius-pill);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
    user-select: none;
    text-decoration: none;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(108,99,255,.3);
}
.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    box-shadow: 0 4px 12px rgba(108,99,255,.4);
}

.btn-secondary {
    background: var(--color-surface-alt);
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-border); }

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover:not(:disabled) { background: #DC2626; }

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
    padding: .4rem .75rem;
}
.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.btn-sm {
    padding: .35rem .9rem;
    font-size: var(--font-size-xs);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

/* ─── Form Elements ───────────────────────────────────────────────────────── */
.form-group {
    display: flex;
    flex-direction: column;
    gap: .4rem;
    margin-bottom: 1.25rem;
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text);
}
.form-label.required::after { content: ' *'; color: var(--color-danger); }

.form-control {
    width: 100%;
    padding: .65rem .9rem;
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: var(--font-size-md);
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(108,99,255,.15);
}
.form-control::placeholder { color: var(--color-text-light); }
.form-control:disabled { opacity: .6; cursor: not-allowed; }

textarea.form-control {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

select.form-control { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .75rem center; padding-right: 2.5rem; }

.form-hint { font-size: var(--font-size-xs); color: var(--color-text-muted); }
.form-error { font-size: var(--font-size-xs); color: var(--color-danger); }
.form-control.has-error { border-color: var(--color-danger); }

/* Tag input */
.tag-input-wrapper {
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: .4rem .6rem;
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    background: var(--color-surface);
    cursor: text;
    min-height: 44px;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.tag-input-wrapper:focus-within {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(108,99,255,.15);
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .2rem .55rem;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: var(--radius-pill);
    font-size: var(--font-size-xs);
    font-weight: 700;
}
.tag-chip-remove {
    cursor: pointer;
    opacity: .6;
    font-size: 1rem;
    line-height: 1;
    border: none;
    background: none;
    color: inherit;
    padding: 0;
}
.tag-chip-remove:hover { opacity: 1; }

.tag-input-field {
    border: none;
    outline: none;
    background: transparent;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    min-width: 120px;
    flex: 1;
}

/* Password strength */
.pwd-strength {
    height: 4px;
    border-radius: var(--radius-pill);
    background: var(--color-border);
    overflow: hidden;
    margin-top: .4rem;
}
.pwd-strength-bar {
    height: 100%;
    border-radius: var(--radius-pill);
    transition: width .3s ease, background .3s ease;
}

/* ─── Cards ───────────────────────────────────────────────────────────────── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-md), box-shadow var(--transition-md);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.card-link { cursor: pointer; }

.rhyme-card {
    display: flex;
    flex-direction: column;
    gap: .6rem;
    height: 100%;
}

.rhyme-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: .5rem;
}

.rhyme-card-title {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
    flex: 1;
}

.rhyme-card-alt-title {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: .1rem;
}

.rhyme-card-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .4rem;
    margin-top: .3rem;
}

.rhyme-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem;
    margin-top: auto;
    padding-top: .75rem;
    border-top: 1px solid var(--color-border);
}

/* ─── Badges / Pills ──────────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: .2rem;
    padding: .15rem .55rem;
    border-radius: var(--radius-pill);
    font-size: var(--font-size-xs);
    font-weight: 700;
    line-height: 1.4;
    white-space: nowrap;
}
.badge-lang    { background: var(--color-accent-light); color: var(--color-accent); }
.badge-cat     { background: var(--color-surface-alt);  color: var(--color-text-muted); }
.badge-tag     { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-muted); font-size: .7rem; }
.badge-audio   { background: var(--color-success-bg);   color: var(--color-success); }
.badge-shared  { background: var(--color-info-bg);      color: var(--color-info); }
.badge-pending { background: var(--color-warning-bg);   color: var(--color-warning); }
.badge-approved{ background: var(--color-success-bg);   color: var(--color-success); }
.badge-rejected{ background: var(--color-danger-bg);    color: var(--color-danger); }
.badge-counter {
    min-width: 18px;
    height: 18px;
    background: var(--color-danger);
    color: #fff;
    border-radius: var(--radius-pill);
    font-size: .65rem;
    font-weight: 800;
    padding: 0 .35rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ─── Tabs ────────────────────────────────────────────────────────────────── */
.tabs {
    display: flex;
    gap: .25rem;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.5rem;
}
.tab-btn {
    padding: .65rem 1.25rem;
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-muted);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition);
    display: flex;
    align-items: center;
    gap: .4rem;
}
.tab-btn:hover { color: var(--color-text); }
.tab-btn.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

/* ─── Toast Notifications ─────────────────────────────────────────────────── */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    pointer-events: none;
}
.toast {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .75rem 1.25rem;
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--color-accent);
    font-size: var(--font-size-sm);
    font-weight: 600;
    min-width: 240px;
    max-width: 380px;
    pointer-events: all;
    animation: toast-in .25s ease;
    transition: transform .25s ease, opacity .25s ease;
}
.toast.removing { transform: translateX(120%); opacity: 0; }
.toast-success { border-left-color: var(--color-success); }
.toast-error   { border-left-color: var(--color-danger); }
.toast-warning { border-left-color: var(--color-warning); }
.toast-icon    { font-size: 1.1rem; flex-shrink: 0; }
.toast-msg     { flex: 1; }
.toast-close   { background: none; border: none; color: var(--color-text-muted); font-size: 1rem; cursor: pointer; opacity: .6; }
.toast-close:hover { opacity: 1; }
@keyframes toast-in { from { transform: translateX(120%); opacity: 0; } to { transform: none; opacity: 1; } }

/* ─── Modal ───────────────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    backdrop-filter: blur(2px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fade-in .15s ease;
}
.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 440px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: scale-in .15s ease;
}
.modal-message {
    font-size: var(--font-size-md);
    color: var(--color-text);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}
.modal-actions {
    display: flex;
    gap: .75rem;
    justify-content: flex-end;
}
@keyframes fade-in  { from { opacity: 0; } to { opacity: 1; } }
@keyframes scale-in { from { transform: scale(.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ─── Audio Player ────────────────────────────────────────────────────────── */
.audio-player {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: .75rem 1rem;
    display: flex;
    align-items: center;
    gap: .75rem;
}
.audio-player-label {
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    white-space: nowrap;
}
.audio-player audio {
    flex: 1;
    height: 32px;
    min-width: 0;
    accent-color: var(--color-accent);
}
/* Style the native audio player consistently */
audio::-webkit-media-controls-panel { background: var(--color-surface-alt); }

/* ─── Ruby (Chinese pinyin) ───────────────────────────────────────────────── */
ruby { display: inline-flex; flex-direction: column-reverse; align-items: center; line-height: 1; margin: 0 .05em; vertical-align: bottom; }
rt {
    font-size: .6em;
    color: var(--color-accent);
    line-height: 1.3;
    text-align: center;
    font-family: var(--font-family);
    letter-spacing: .02em;
}
.lyrics-chinese { line-height: 2.5; word-break: break-all; }


/* ─── ABC Sheet Music ─────────────────────────────────────────────────────── */
.sheet-music-wrapper {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    overflow-x: auto;
}
.sheet-music-wrapper svg { max-width: 100%; }

/* ─── Grid / List Toggle ──────────────────────────────────────────────────── */
.view-toggle {
    display: flex;
    gap: .25rem;
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    padding: .25rem;
}
.view-toggle-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text-muted);
    font-size: .9rem;
    transition: background var(--transition), color var(--transition);
}
.view-toggle-btn.active {
    background: var(--color-surface);
    color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

/* ─── Rhyme Grid ──────────────────────────────────────────────────────────── */
.rhyme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}
.rhyme-list {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}
.rhyme-list .card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    padding: .85rem 1.25rem;
}
.rhyme-list .rhyme-card { flex-direction: row; align-items: center; gap: 1rem; }
.rhyme-list .rhyme-card-meta { flex: 1; }
.rhyme-list .rhyme-card-footer { border-top: none; padding-top: 0; margin-top: 0; }

/* ─── Filters Bar ─────────────────────────────────────────────────────────── */
.filters-bar {
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}
.filters-bar .form-control {
    padding: .4rem .75rem;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-pill);
    max-width: 180px;
}
.search-input-wrap {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 380px;
}
.search-icon {
    position: absolute;
    left: .75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
    font-size: .9rem;
}
.search-input {
    padding-left: 2.2rem !important;
    border-radius: var(--radius-pill) !important;
}

/* ─── Pagination ──────────────────────────────────────────────────────────── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}
.pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 .65rem;
    border: 1.5px solid var(--color-border);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.pagination-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pagination-btn.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.pagination-btn:disabled { opacity: .4; cursor: not-allowed; }

/* ─── Empty State ─────────────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-muted);
}
.empty-state-icon { font-size: 3rem; margin-bottom: 1rem; opacity: .5; }
.empty-state-title { font-size: var(--font-size-lg); font-weight: 700; margin-bottom: .5rem; }
.empty-state-desc  { font-size: var(--font-size-sm); }

/* ─── Markdown Rendered Content ───────────────────────────────────────────── */
.md-content { line-height: 1.8; }
.md-content p  { margin-bottom: .75rem; }
.md-content p:last-child { margin-bottom: 0; }
.md-content strong { font-weight: 700; }
.md-content em { font-style: italic; }
.md-content hr { border: none; border-top: 1px solid var(--color-border); margin: 1rem 0; }

/* ─── Details / Summary ───────────────────────────────────────────────────── */
details.collapse {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
details.collapse summary {
    padding: .75rem 1rem;
    font-weight: 700;
    font-size: var(--font-size-sm);
    cursor: pointer;
    background: var(--color-surface-alt);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: .5rem;
}
details.collapse summary::before { content: '▶'; font-size: .7rem; transition: transform .2s; }
details.collapse[open] summary::before { transform: rotate(90deg); }
details.collapse .collapse-body { padding: 1rem; }