/* ═══════════════════════════════════════════════════════
   UAA AI写作 — UI 组件库
════════════════════════════════════════════════════════ */

/* ═══════ 按钮系统 ═══════ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 20px;
    border-radius: var(--radius-pill);
    border: none;
    cursor: pointer;
    font-size: 13.5px;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

/* 主按钮：紫→蓝渐变 */
.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-btn);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0);
    transition: background 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(147,51,234,0.55);
}

.btn-primary:hover::before { background: rgba(255,255,255,0.08); }
.btn-primary:active { transform: translateY(0); }

/* 次级按钮：描边 */
.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-normal);
}

.btn-secondary:hover {
    background: rgba(139,92,246,0.1);
    color: var(--text-primary);
    border-color: var(--border-active);
}

/* 幽灵按钮 */
.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid transparent;
}

.btn-ghost:hover {
    background: rgba(139,92,246,0.08);
    color: var(--text-secondary);
}

/* 危险按钮 */
.btn-danger {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.3);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

/* 尺寸变体 */
.btn-sm  { padding: 5px 14px; font-size: 12px; }
.btn-lg  { padding: 12px 28px; font-size: 15px; letter-spacing: 0.5px; }
.btn-xl  { padding: 14px 36px; font-size: 16px; letter-spacing: 1px; }

/* ═══════ 卡片 ═══════ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.25s, border-color 0.25s, transform 0.25s;
    position: relative;
}

.card:hover {
    box-shadow: var(--shadow-md), 0 0 0 1px var(--border-normal);
    border-color: var(--border-normal);
}

.card-glow:hover {
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.card-body { padding: 20px 24px; }

/* ═══════ 表单 ═══════ */
.form-group { margin-bottom: 18px; }

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    background: rgba(42,46,72,0.6);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-control::placeholder { color: var(--text-disabled); }

.form-control:focus {
    border-color: var(--purple);
    box-shadow: 0 0 0 3px rgba(139,92,246,0.15);
    background: rgba(42,46,72,0.8);
}

.form-control option {
    background: var(--bg-card);
    color: var(--text-primary);
}

textarea.form-control { resize: vertical; min-height: 80px; }
.form-hint { font-size: 11.5px; color: var(--text-muted); margin-top: 4px; }

/* ═══════ 徽章 ═══════ */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: var(--radius-pill);
    font-size: 11px;
    font-weight: 500;
}

.badge-primary {
    background: rgba(139,92,246,0.2);
    color: var(--purple-light);
    border: 1px solid rgba(139,92,246,0.3);
}

.badge-success {
    background: rgba(16,185,129,0.15);
    color: var(--success);
    border: 1px solid rgba(16,185,129,0.3);
}

.badge-warning {
    background: rgba(245,158,11,0.15);
    color: var(--warning);
    border: 1px solid rgba(245,158,11,0.3);
}

.badge-secondary {
    background: rgba(240,236,255,0.08);
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
}

/* ═══════ 告警 ═══════ */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    margin-bottom: 16px;
}

.alert-success {
    background: rgba(16,185,129,0.1);
    color: #6EE7B7;
    border: 1px solid rgba(16,185,129,0.3);
}

.alert-danger {
    background: rgba(239,68,68,0.1);
    color: #FCA5A5;
    border: 1px solid rgba(239,68,68,0.3);
}

.alert-info {
    background: rgba(6,182,212,0.1);
    color: #67E8F9;
    border: 1px solid rgba(6,182,212,0.3);
}

.alert-warning {
    background: rgba(245,158,11,0.1);
    color: #FCD34D;
    border: 1px solid rgba(245,158,11,0.3);
}

/* ═══════ 统计数字卡片 ═══════ */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    transition: all 0.25s;
}

.stat-card:hover {
    border-color: var(--border-normal);
    box-shadow: var(--shadow-glow);
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.stat-value {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 6px;
    font-family: 'SF Mono','Cascadia Code','Consolas',monospace;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    -webkit-text-fill-color: var(--text-muted);
}

/* ═══════ 模态框 ═══════ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.show { display: flex; }

.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-xl);
    padding: 28px 32px;
    width: 440px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(8px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-box h3 {
    font-family: 'Songti SC','STSong','SimSun','Source Han Serif SC',Georgia,serif;
    font-size: 17px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.modal-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.6;
}

.modal-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    margin-bottom: 16px;
    background: rgba(42,46,72,0.6);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.modal-input:focus {
    border-color: var(--purple);
    box-shadow: 0 0 0 3px rgba(139,92,246,0.15);
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* ═══════ Toast ═══════ */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    color: var(--text-primary);
    padding: 10px 22px;
    border-radius: var(--radius-pill);
    font-size: 13.5px;
    z-index: 9999;
    box-shadow: var(--shadow-md), 0 0 20px rgba(139,92,246,0.3);
    border: 1px solid var(--border-normal);
    transition: opacity 0.3s;
    white-space: nowrap;
}

/* ═══════ 分割线 ═══════ */
.divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 16px 0;
}

/* ── 参考模版按钮 ── */
.btn-tpl-ref {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: 10px;
    padding: 2px 10px;
    font-size: 11px;
    font-family: inherit;
    font-weight: 500;
    color: #FB923C;
    background: rgba(251,146,60,0.08);
    border: 1px solid rgba(251,146,60,0.3);
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    vertical-align: middle;
    line-height: 1.6;
}
.btn-tpl-ref:hover {
    background: rgba(251,146,60,0.16);
    border-color: rgba(251,146,60,0.55);
}
.btn-tpl-ref i { font-size: 12px; }