/* tools.css — shared styles cho các trang tiện ích */

.tool-pro {
    --primary-color: var(--brand-500);
    --primary-hover: var(--brand-400);
    --bg-color: var(--bg);
    --card-bg: var(--surface);
    --text-color: var(--fg);
    --text-muted: var(--fg-muted);
    --border-color: var(--border);
    --error-color: #ef4444;
    --success-color: #10b981;
    --input-bg: var(--bg);
    --variable-color: #f59e0b;

    background: var(--card-bg);
    width: 100%; max-width: 1100px; margin: 24px auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,.5);
    padding: 30px; border: 1px solid var(--border-color);
    color: var(--text-color);
}
.tool-pro h1 { text-align: center; color: var(--primary-color); margin: 0 0 8px;
    font-size: 1.8rem; text-transform: uppercase; letter-spacing: 1px; }
.tool-pro .desc { text-align: center; color: var(--text-muted); margin: 0 0 20px;
    font-size: .95rem; line-height: 1.5; }
.tool-pro label { display: block; margin-bottom: 8px; font-weight: 600;
    font-size: .95rem; color: var(--text-color); }

/* ===== GUIDE LINK - dan sang trang huong dan ===== */
.guide-link {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 20px; margin: 0 0 22px;
    background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(217,70,239,.10));
    border: 1px solid rgba(99,102,241,.35);
    border-radius: 10px;
    color: var(--text-color); text-decoration: none;
    font-size: 14px; transition: all .2s ease;
}
.guide-link:hover {
    background: linear-gradient(135deg, rgba(99,102,241,.25), rgba(217,70,239,.18));
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99,102,241,.25);
}
.guide-link .play-icon {
    flex-shrink: 0;
    width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff; display: grid; place-items: center;
    font-size: 13px; padding-left: 3px;
    box-shadow: 0 4px 12px rgba(239,68,68,.4);
}
.guide-link > span:nth-child(2) { flex: 1; line-height: 1.4; }
.guide-link b { color: var(--primary-color); }
.guide-link .arrow {
    flex-shrink: 0; font-size: 18px; color: var(--primary-color);
    transition: transform .2s;
}
.guide-link:hover .arrow { transform: translateX(4px); }
@media (max-width: 600px) {
    .guide-link { padding: 12px 14px; gap: 10px; font-size: 13px; }
    .guide-link .play-icon { width: 32px; height: 32px; }
}

/* ===== TAB PILLS - menu chon tien ich ===== */
.tool-tabs {
    display: flex; gap: 6px;
    background: var(--surface); padding: 6px;
    border-radius: 14px; border: 1px solid var(--border);
    margin: 24px auto 0; max-width: 1100px;
    overflow-x: auto; scrollbar-width: thin;
}
.tool-tabs::-webkit-scrollbar { height: 6px; }
.tool-tabs::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.tool-tab {
    flex: 1; min-width: 180px;
    padding: 12px 16px; border-radius: 10px;
    display: flex; gap: 10px; align-items: center;
    color: var(--fg-muted); text-decoration: none;
    white-space: nowrap; font-size: 14px; font-weight: 500;
    transition: all .18s ease; border: 1px solid transparent;
}
.tool-tab:hover {
    background: var(--surface-hover); color: var(--fg);
    border-color: var(--border);
}
.tool-tab.active {
    background: linear-gradient(135deg, #6366f1, #8b5cf6, #d946ef);
    color: #fff; font-weight: 600;
    box-shadow: 0 4px 14px rgba(99,102,241,.4);
}
.tool-tab .num {
    width: 26px; height: 26px; border-radius: 50%;
    background: var(--bg); border: 1px solid var(--border);
    display: grid; place-items: center;
    font-size: 12px; font-weight: 700;
    flex-shrink: 0;
}
.tool-tab.active .num {
    background: rgba(255,255,255,.22);
    border-color: rgba(255,255,255,.3);
    color: #fff;
}
.tool-tab .label { overflow: hidden; text-overflow: ellipsis; }

@media (max-width: 768px) {
    .tool-tabs { flex-wrap: wrap; padding: 4px; gap: 4px; }
    .tool-tab { flex: 1 1 calc(50% - 4px); min-width: 0; padding: 10px 12px; font-size: 13px; }
    .tool-tab .label { white-space: normal; line-height: 1.3; }
}
@media (max-width: 420px) {
    .tool-tab { flex: 1 1 100%; }
}

.btn-reset { padding: 6px 12px; background: none; cursor: pointer;
    border-radius: 4px; border: 1px solid var(--border-color);
    color: var(--text-muted); }
.btn-reset:hover { background: var(--surface-hover); color: var(--text-color); }

/* Card grid */
.char-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-bottom: 15px; }
.char-card { background: var(--input-bg); border: 2px dashed var(--border-color);
    border-radius: 10px; padding: 10px; display: flex; flex-direction: column;
    align-items: center; position: relative; transition: all .3s ease;
    aspect-ratio: 1/1.3; }
.char-card:hover { border-color: var(--text-muted); }
.char-card.dragover { border-color: var(--primary-color);
    background: rgba(99,102,241,.1); border-style: solid; transform: scale(1.02); }
.char-card.has-image { border-style: solid; border-color: var(--border-color); }
.char-card.duplicate-alert { animation: shake .5s; border-color: var(--error-color); }
@keyframes shake {
    10%,90%{transform:translate3d(-1px,0,0)}
    20%,80%{transform:translate3d(2px,0,0)}
    30%,50%,70%{transform:translate3d(-4px,0,0)}
    40%,60%{transform:translate3d(4px,0,0)}
}
.img-preview { width: 100%; flex: 1; background: var(--bg-color);
    border-radius: 6px; overflow: hidden; display: flex; align-items: center;
    justify-content: center; margin-bottom: 10px; position: relative;
    cursor: pointer; border: 1px solid var(--border-color); }
.img-preview img { width: 100%; height: 100%; object-fit: cover; display: none; }
.placeholder-text { color: var(--text-muted); font-size: .85rem;
    text-align: center; padding: 10px; }
.char-name-input { width: 100%; padding: 10px; background: var(--bg-color);
    border: 1px solid var(--border-color); color: var(--text-color);
    border-radius: 6px; text-align: center; font-weight: 600; font-size: .9rem;
    box-sizing: border-box; }
.char-name-input:focus { outline: none; border-color: var(--primary-color); }
.remove-btn { position: absolute; top: -8px; right: -8px;
    background: var(--error-color); color: #fff; border: 2px solid var(--card-bg);
    width: 26px; height: 26px; border-radius: 50%; cursor: pointer;
    display: flex; align-items: center; justify-content: center; font-size: 16px;
    opacity: 0; transition: opacity .2s, transform .2s; z-index: 10; }
.remove-btn:hover { transform: scale(1.1); }
.char-card:hover .remove-btn { opacity: 1; }
.controls { display: flex; gap: 10px; margin-bottom: 20px; align-items: center; }
.btn-add { background: rgba(255,255,255,.02); border: 2px dashed var(--border-color);
    color: var(--text-muted); display: flex; align-items: center;
    justify-content: center; font-size: 2.5rem; cursor: pointer;
    border-radius: 10px; aspect-ratio: 1/1.3; width: 100%; }
.btn-add:hover { background: rgba(99,102,241,.1);
    border-color: var(--primary-color); color: var(--primary-color); }

/* Variables */
.var-section { background: rgba(245,158,11,.05); border: 1px solid rgba(245,158,11,.2);
    padding: 15px; border-radius: 8px; margin-bottom: 10px; }
.var-header { display: flex; justify-content: space-between;
    align-items: center; margin-bottom: 10px; }
.var-title { color: var(--variable-color); font-weight: bold; font-size: 1rem; }
.var-list { display: flex; flex-direction: column; gap: 10px; }
.var-row { display: flex; gap: 10px; align-items: center; }
.var-input { background: var(--input-bg); border: 1px solid var(--border-color);
    color: var(--text-color); padding: 8px 12px; border-radius: 6px; flex: 1; }
.var-input:focus { outline: none; border-color: var(--variable-color); }
.btn-add-var { background: transparent; border: 1px dashed var(--variable-color);
    color: var(--variable-color); padding: 5px 10px; border-radius: 4px;
    cursor: pointer; font-size: .85rem; }
.btn-add-var:hover { background: rgba(245,158,11,.1); }
.btn-del-var { background: var(--card-bg); color: var(--error-color);
    border: 1px solid var(--border-color); width: 32px; height: 32px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 4px; cursor: pointer; }
.var-hint { margin-top: 8px; font-size: .8rem; color: var(--text-muted);
    font-style: italic; }

/* Affix */
.affix-controls { display: grid; grid-template-columns: 1fr 1fr;
    gap: 20px; margin-bottom: 5px; }
.affix-group label { font-size: .9rem; color: var(--text-muted); margin-bottom: 5px; }
.affix-input { width: 100%; padding: 10px; background: var(--input-bg);
    border: 1px solid var(--border-color); color: var(--text-color);
    border-radius: 6px; box-sizing: border-box; }
.affix-input:focus { outline: none; border-color: var(--primary-color); }

.tool-pro textarea { width: 100%; height: 150px; padding: 12px;
    background: var(--input-bg); color: var(--text-color);
    border: 1px solid var(--border-color); border-radius: 8px;
    font-family: 'Consolas','Monaco',monospace; resize: vertical;
    box-sizing: border-box; margin-bottom: 15px; }
.tool-pro textarea:focus { outline: none; border-color: var(--primary-color); }

.btn-process { background: var(--primary-color); color: #fff; border: none;
    padding: 12px 24px; border-radius: 6px; cursor: pointer; font-weight: 600;
    width: 100%; font-size: 1rem; }
.btn-process:hover { background: var(--primary-hover); }

.result-area { margin-top: 20px; border-top: 1px solid var(--border-color);
    padding-top: 20px; }
.action-bar { display: flex; justify-content: space-between;
    align-items: center; margin-bottom: 10px; }
.copy-group { display: flex; align-items: center; gap: 10px; }
.clone-input { background: var(--bg-color); border: 1px solid var(--border-color);
    color: var(--text-color); padding: 8px; border-radius: 6px;
    width: 60px; text-align: center; font-weight: bold; font-size: .95rem; }
.btn-copy { background: var(--success-color); color: #fff; border: none;
    padding: 8px 16px; border-radius: 6px; cursor: pointer; font-weight: 600; }
.btn-copy:hover { background: #059669; }

#toast { visibility: hidden; min-width: 250px; background: var(--error-color);
    color: #fff; text-align: center; border-radius: 8px; padding: 16px;
    position: fixed; z-index: 1000; left: 50%; bottom: 30px;
    transform: translateX(-50%); font-size: .95rem; opacity: 0;
    transition: opacity .3s; }
#toast.show { visibility: visible; opacity: 1; }

@media (max-width: 900px) { .char-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 600px) {
    .char-grid { grid-template-columns: repeat(2, 1fr); }
    .affix-controls { grid-template-columns: 1fr; gap: 10px; }
}