/* ==============================================
   秒速排页面链接生成器 v2.0 — 样式系统
   ============================================== */

:root {
    --color-primary: #6365f1;
    --color-primary-hover: #5457e5;
    --color-primary-light: #eef0ff;
    --color-primary-glow: rgba(99, 101, 241, 0.25);
    --color-bg: #f6f7fb;
    --color-surface: #ffffff;
    --color-surface-hover: #fafbfd;
    --color-surface-elevated: #ffffff;
    --color-text: #1a1d2e;
    --color-text-secondary: #5a6072;
    --color-text-muted: #949aad;
    --color-border: #e8ebf2;
    --color-border-light: #f0f2f6;
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-danger: #ef4444;
    --color-danger-bg: #fef2f2;
    --color-danger-border: #fecaca;
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.03);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.03);
    --shadow-xl: 0 24px 48px rgba(0,0,0,0.1);
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
    --transition-fast: 0.15s cubic-bezier(0.4,0,0.2,1);
    --transition-normal: 0.25s cubic-bezier(0.4,0,0.2,1);
    --transition-slow: 0.4s cubic-bezier(0.4,0,0.2,1);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { font-size:16px; -webkit-font-smoothing:antialiased; }
body {
    font-family:var(--font-sans);
    background:var(--color-bg);
    color:var(--color-text);
    line-height:1.6;
    min-height:100vh;
    position:relative;
    overflow-x:hidden;
}

.bg-decoration { position:fixed; inset:0; pointer-events:none; z-index:0; overflow:hidden; }
.bg-orb { position:absolute; border-radius:50%; filter:blur(100px); opacity:0.5; }
.bg-orb-1 { width:500px; height:500px; background:rgba(99,101,241,0.08); top:-150px; right:-100px; animation:floatOrb 18s ease-in-out infinite; }
.bg-orb-2 { width:400px; height:400px; background:rgba(139,92,246,0.06); bottom:-100px; left:-80px; animation:floatOrb 22s ease-in-out infinite reverse; }
.bg-orb-3 { width:300px; height:300px; background:rgba(16,185,129,0.05); top:40%; left:50%; animation:floatOrb 20s ease-in-out infinite 5s; }
@keyframes floatOrb {
    0%,100% { transform:translate(0,0) scale(1); }
    25% { transform:translate(30px,-40px) scale(1.08); }
    50% { transform:translate(-20px,30px) scale(0.94); }
    75% { transform:translate(-35px,-25px) scale(1.04); }
}
.bg-grid {
    position:absolute; inset:0;
    background-image:linear-gradient(rgba(99,101,241,0.02) 1px,transparent 1px),linear-gradient(90deg,rgba(99,101,241,0.02) 1px,transparent 1px);
    background-size:60px 60px;
    mask-image:radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image:radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.app-container { position:relative; z-index:1; max-width:880px; margin:0 auto; padding:20px 20px 40px; }

.app-header { text-align:center; padding:16px 0 28px; }
.header-inner { display:flex; flex-direction:column; align-items:center; gap:8px; }
.brand { display:flex; align-items:center; gap:12px; }
.brand-logo svg { display:block; filter:drop-shadow(0 6px 16px rgba(99,101,241,0.35)); }
.brand-text { display:flex; align-items:baseline; gap:8px; }
.brand-name { font-size:2rem; font-weight:800; letter-spacing:-0.03em; background:linear-gradient(135deg,#1e1b4b 0%,#4338ca 100%); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.brand-badge { font-size:0.7rem; font-weight:600; padding:3px 8px; border-radius:var(--radius-full); background:var(--color-primary-light); color:var(--color-primary); letter-spacing:0.04em; }
.header-desc { font-size:0.88rem; color:var(--color-text-muted); font-weight:400; }

.main-grid { display:flex; flex-direction:column; gap:16px; }
.main-column { display:flex; flex-direction:column; gap:16px; }

.card {
    background:var(--color-surface);
    border-radius:var(--radius-lg);
    padding:22px 24px;
    box-shadow:var(--shadow-sm);
    border:1px solid var(--color-border);
    transition:box-shadow var(--transition-normal), border-color var(--transition-normal);
    position:relative;
}
.card:hover { box-shadow:var(--shadow-md); border-color:#dcdfe8; }
.card::before {
    content:''; position:absolute; top:0; left:0; right:0; height:3px;
    background:linear-gradient(90deg,var(--color-primary),#8b5cf6,var(--color-primary));
    opacity:0; transition:opacity var(--transition-normal);
    border-radius:var(--radius-lg) var(--radius-lg) 0 0; z-index:1;
}
.card:focus-within::before { opacity:1; }
.card-top-bar { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; flex-wrap:wrap; gap:10px; }

.step-indicator { display:flex; align-items:center; gap:10px; }
.step-num { width:28px; height:28px; border-radius:50%; background:var(--color-primary); color:#fff; font-size:0.78rem; font-weight:700; display:flex; align-items:center; justify-content:center; flex-shrink:0; box-shadow:0 4px 10px var(--color-primary-glow); }
.step-label { font-weight:600; font-size:0.95rem; color:#1e293b; }
.count-badge { display:inline-flex; align-items:center; justify-content:center; min-width:26px; height:26px; padding:0 8px; border-radius:var(--radius-full); background:var(--color-primary-light); color:var(--color-primary); font-size:0.8rem; font-weight:700; }

/* ========== 修复后的参考按钮 & 弹出层 ========== */
.reference-trigger {
    position: relative;
}
.btn-reference {
    display: inline-flex; align-items:center; gap:6px;
    padding:8px 14px; border:1.5px solid var(--color-border); background:#fff;
    border-radius:var(--radius-full); font-size:0.78rem; color:var(--color-text-secondary);
    cursor:pointer; transition:all var(--transition-fast); white-space:nowrap; font-weight:500;
}
.btn-reference:hover {
    background:var(--color-primary-light); border-color:var(--color-primary); color:var(--color-primary);
}

/* 弹窗默认隐藏，且不允许交互 */
.reference-popover {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 480px;
    max-width: calc(100vw - 40px);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    pointer-events: none;
    max-height: 75vh;
    overflow-y: auto;
}
/* 注意：弹窗的显示/隐藏已完全由 JavaScript 控制，此处不再使用 :hover */

.popover-inner { padding:20px; }
.popover-inner h3 { font-size:0.95rem; font-weight:700; margin-bottom:4px; color:#1e293b; }
.popover-subtitle { font-size:0.75rem; color:var(--color-text-muted); margin-bottom:14px; line-height:1.5; }
.popover-subtitle code { background:#f1f5f9; padding:2px 6px; border-radius:4px; font-family:var(--font-mono); font-size:0.7rem; color:var(--color-primary); }
.ref-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-bottom:10px; }
.ref-group h4 { font-size:0.75rem; font-weight:600; color:#475569; margin-bottom:4px; }
.ref-row { display:flex; align-items:center; gap:6px; font-size:0.72rem; color:#64748b; margin-bottom:2px; }
.ref-badge { display:inline-block; padding:2px 7px; border-radius:10px; font-family:var(--font-mono); font-size:0.68rem; font-weight:600; white-space:nowrap; }
.badge-digit { background:#eff6ff; color:#2563eb; }
.badge-alpha { background:#f0fdf4; color:#16a34a; }
.badge-mixed { background:#faf5ff; color:#7c3aed; }
.badge-range { background:#fff7ed; color:#ea580c; }
.popover-tip { font-size:0.72rem; color:#64748b; background:#f8fafc; padding:8px 10px; border-radius:var(--radius-sm); border:1px solid #f1f5f9; }

.template-input-wrap { position:relative; }
.template-input-wrap textarea {
    width:100%; min-height:80px; padding:14px 16px; border:2px solid var(--color-border);
    border-radius:var(--radius-md); font-size:0.92rem; font-family:var(--font-mono); resize:vertical;
    transition:border-color var(--transition-normal), box-shadow var(--transition-normal);
    background:#fafbfd; color:#1e293b; line-height:1.7; letter-spacing:0.01em;
}
.template-input-wrap textarea:focus { outline:none; border-color:var(--color-primary); box-shadow:0 0 0 4px rgba(99,101,241,0.06); background:#fff; }
.template-input-wrap textarea::placeholder { color:#bcc3d0; }
.input-underline { position:absolute; bottom:0; left:50%; width:0; height:2px; background:var(--color-primary); transition:all var(--transition-normal); border-radius:0 0 2px 2px; }
.template-input-wrap textarea:focus ~ .input-underline { width:calc(100% - 4px); left:2px; }

.template-meta { margin-top:12px; display:flex; flex-wrap:wrap; align-items:flex-start; gap:10px; }
.placeholders-detected { flex:1; display:flex; flex-wrap:wrap; gap:5px; min-height:26px; align-items:center; }
.placeholder-tag { display:inline-flex; align-items:center; padding:4px 10px; border-radius:var(--radius-full); font-size:0.7rem; font-weight:500; font-family:var(--font-mono); animation:popIn 0.25s cubic-bezier(0.34,1.56,0.64,1); }
@keyframes popIn { from { opacity:0; transform:scale(0.8); } to { opacity:1; transform:scale(1); } }
.tag-digit { background:#eff6ff; color:#2563eb; border:1px solid #bfdbfe; }
.tag-alpha { background:#f0fdf4; color:#16a34a; border:1px solid #bbf7d0; }
.tag-mixed { background:#faf5ff; color:#7c3aed; border:1px solid #e9d5ff; }
.tag-range { background:#fff7ed; color:#ea580c; border:1px solid #fed7aa; }
.tag-unknown { background:#fef2f2; color:#dc2626; border:1px solid #fecaca; }
.no-placeholders { color:#bcc3d0; font-size:0.76rem; font-style:italic; }

.quick-templates { display:flex; flex-wrap:wrap; align-items:center; gap:5px; }
.quick-label { font-size:0.7rem; color:var(--color-text-muted); white-space:nowrap; }
.quick-chip { padding:5px 11px; border-radius:var(--radius-full); border:1.5px dashed #d4d9e6; background:#fafbfd; cursor:pointer; font-size:0.7rem; color:#5a6072; transition:all var(--transition-fast); white-space:nowrap; font-family:var(--font-mono); font-weight:500; }
.quick-chip:hover { border-color:var(--color-primary); color:var(--color-primary); background:var(--color-primary-light); border-style:solid; transform:translateY(-1px); }
.quick-chip:active { transform:scale(0.95); }

.preview-bar { margin-top:12px; padding:10px 14px; background:linear-gradient(135deg,#f8fafc,#f1f5f9); border-radius:var(--radius-sm); border:1px solid #e8ebf2; display:flex; align-items:center; gap:8px; overflow:hidden; }
.preview-icon { font-size:0.85rem; flex-shrink:0; }
.preview-label-text { font-size:0.75rem; color:var(--color-text-muted); white-space:nowrap; flex-shrink:0; }
.preview-link { font-family:var(--font-mono); font-size:0.8rem; color:#4f46e5; word-break:break-all; flex:1; min-width:0; }

.settings-body { display:flex; flex-wrap:wrap; align-items:center; gap:16px; }
.settings-row { display:flex; flex-wrap:wrap; align-items:center; gap:20px; }
.setting-group { display:flex; align-items:center; gap:8px; }
.setting-label { font-size:0.84rem; font-weight:500; color:#475569; display:flex; align-items:center; gap:7px; cursor:pointer; user-select:none; }
.input-with-suffix { display:flex; align-items:center; border:2px solid var(--color-border); border-radius:var(--radius-sm); overflow:hidden; transition:border-color var(--transition-fast); background:#fafbfd; }
.input-with-suffix:focus-within { border-color:var(--color-primary); box-shadow:0 0 0 3px rgba(99,101,241,0.06); }
.setting-input-num { width:72px; padding:9px 8px; border:none; font-size:0.9rem; text-align:center; font-weight:600; background:transparent; color:#1e293b; font-family:var(--font-mono); }
.setting-input-num:focus { outline:none; }
.setting-input-select { padding:9px 8px; border:2px solid var(--color-border); border-radius:var(--radius-sm); font-size:0.85rem; font-weight:500; background:#fafbfd; color:#1e293b; cursor:pointer; transition:all var(--transition-fast); }
.setting-input-select:focus { outline:none; border-color:var(--color-primary); box-shadow:0 0 0 3px rgba(99,101,241,0.06); background:#fff; }
.input-suffix { padding:0 10px; font-size:0.78rem; color:var(--color-text-muted); background:#f1f5f9; font-weight:500; border-left:1px solid var(--color-border); }
.setting-hint { font-size:0.72rem; color:#bcc3d0; }

.custom-checkbox { appearance:none; width:18px; height:18px; border:2px solid #cbd5e1; border-radius:5px; cursor:pointer; transition:all var(--transition-fast); flex-shrink:0; position:relative; background:#fff; }
.custom-checkbox:checked { background:var(--color-primary); border-color:var(--color-primary); }
.custom-checkbox:checked::after { content:''; position:absolute; left:5px; top:2px; width:5px; height:9px; border:solid #fff; border-width:0 2px 2px 0; transform:rotate(45deg); }
.custom-checkbox:focus-visible { box-shadow:0 0 0 3px rgba(99,101,241,0.2); }

.btn-generate {
    display:inline-flex; align-items:center; gap:8px; padding:13px 30px;
    background:linear-gradient(135deg,#6365f1 0%,#7c3aed 100%); color:#fff; border:none;
    border-radius:var(--radius-full); font-size:0.95rem; font-weight:600; cursor:pointer;
    transition:all var(--transition-normal); box-shadow:0 6px 20px rgba(99,101,241,0.35);
    letter-spacing:0.02em; position:relative; overflow:hidden;
}
.btn-generate::after { content:''; position:absolute; inset:0; background:linear-gradient(135deg,transparent 40%,rgba(255,255,255,0.15)); pointer-events:none; }
.btn-generate:hover { transform:translateY(-2px); box-shadow:0 10px 28px rgba(99,101,241,0.45); }
.btn-generate:active { transform:scale(0.96); box-shadow:0 4px 12px rgba(99,101,241,0.3); }
.btn-generate:disabled { opacity:0.55; cursor:not-allowed; pointer-events:none; filter:grayscale(20%); }
.btn-generate .spinner { display:none; width:18px; height:18px; border:2.5px solid rgba(255,255,255,0.3); border-top-color:#fff; border-radius:50%; animation:spin 0.7s linear infinite; }
.btn-generate.loading .spinner { display:inline-block; }
.btn-generate.loading .btn-text { display:none; }
@keyframes spin { to { transform:rotate(360deg); } }

.results-actions { display:flex; gap:6px; flex-wrap:wrap; }
.btn-action { display:inline-flex; align-items:center; gap:5px; padding:7px 13px; border-radius:var(--radius-full); font-size:0.75rem; font-weight:500; cursor:pointer; border:1.5px solid #e2e8f0; background:#fff; color:#5a6072; transition:all var(--transition-fast); white-space:nowrap; }
.btn-action:hover { background:#f8fafc; border-color:#94a3b8; transform:translateY(-1px); }
.btn-action.btn-copy-all { border-color:#a5b4fc; color:#4f46e5; background:#eef2ff; }
.btn-action.btn-copy-all:hover { background:#e0e7ff; border-color:#818cf8; }
.btn-action.btn-export { border-color:#a7f3d0; color:#059669; background:#ecfdf5; }
.btn-action.btn-export:hover { background:#d1fae5; border-color:#6ee7b7; }
.btn-action.btn-clear { border-color:#fecaca; color:#dc2626; background:#fef2f2; }
.btn-action.btn-clear:hover { background:#fee2e2; border-color:#fca5a5; }
.btn-action:disabled { opacity:0.4; cursor:not-allowed; pointer-events:none; }

.results-list { max-height:460px; overflow-y:auto; position:relative; border-radius:var(--radius-sm); border:1px solid var(--color-border-light); background:#fafbfd; scroll-behavior:smooth; }
.results-list::-webkit-scrollbar { width:5px; }
.results-list::-webkit-scrollbar-track { background:transparent; margin:4px 0; }
.results-list::-webkit-scrollbar-thumb { background:#d4d9e6; border-radius:10px; }
.results-list::-webkit-scrollbar-thumb:hover { background:#bcc3d0; }
.virtual-scroll-inner { position:relative; min-height:60px; }

.result-item { display:flex; align-items:center; gap:10px; padding:10px 14px; background:#fff; border-bottom:1px solid #f0f2f6; transition:background var(--transition-fast); position:absolute; left:0; right:0; height:46px; }
.result-item:hover { background:#f8fafd; }
.result-item .item-index { font-size:0.68rem; color:#bcc3d0; min-width:30px; text-align:right; font-weight:500; flex-shrink:0; font-family:var(--font-mono); user-select:none; }
.result-item .link-text { flex:1; font-family:var(--font-mono); font-size:0.8rem; color:#334155; word-break:break-all; line-height:1.5; text-decoration:none; min-width:0; }
.result-item .link-text.is-url { color:#2563eb; cursor:pointer; transition:color var(--transition-fast); }
.result-item .link-text.is-url:hover { color:#1d4ed8; text-decoration:underline; text-underline-offset:3px; }
.result-item .btn-copy-one { flex-shrink:0; width:32px; height:32px; border-radius:50%; border:1.5px solid #e2e8f0; background:#fff; cursor:pointer; display:flex; align-items:center; justify-content:center; color:#94a3b8; font-size:0.75rem; transition:all var(--transition-fast); }
.result-item .btn-copy-one:hover { background:#eef2ff; border-color:#a5b4fc; color:#4f46e5; transform:scale(1.08); }
.result-item .btn-copy-one.copied { background:#ecfdf5; border-color:#6ee7b7; color:#10b981; }

.empty-state { display:flex; flex-direction:column; align-items:center; justify-content:center; padding:50px 20px; color:#bcc3d0; text-align:center; position:absolute; inset:0; }
.empty-illustration { margin-bottom:12px; opacity:0.5; }
.empty-title { font-size:0.9rem; font-weight:600; color:#94a3b8; margin-bottom:2px; }
.empty-desc { font-size:0.78rem; color:#bcc3d0; }

.app-footer { text-align:center; padding:20px 0 8px; font-size:0.72rem; color:#bcc3d0; }
.app-footer kbd { display:inline-block; padding:2px 7px; background:#f1f5f9; border:1px solid #e2e8f0; border-radius:4px; font-family:var(--font-mono); font-size:0.68rem; color:#64748b; }

.toast-container { position:fixed; top:20px; right:20px; z-index:9999; display:flex; flex-direction:column; gap:8px; pointer-events:none; }
.toast { padding:12px 20px; border-radius:var(--radius-full); font-size:0.84rem; font-weight:500; color:#fff; background:#1e293b; box-shadow:var(--shadow-lg); animation:slideInRight 0.35s cubic-bezier(0.34,1.56,0.64,1), fadeOut 0.3s ease 2s forwards; pointer-events:auto; display:flex; align-items:center; gap:8px; backdrop-filter:blur(10px); }
.toast.success { background:linear-gradient(135deg,#059669,#10b981); }
.toast.info { background:linear-gradient(135deg,#4f46e5,#6365f1); }
@keyframes slideInRight { from { transform:translateX(120%); opacity:0; } to { transform:translateX(0); opacity:1; } }
@keyframes fadeOut { to { opacity:0; transform:translateY(-10px); } }

@media (max-width:640px) {
    .app-container { padding:12px 10px 30px; }
    .brand-name { font-size:1.5rem; }
    .brand-logo svg { width:34px; height:34px; }
    .card { padding:16px; border-radius:var(--radius-md); }
    .settings-body { flex-direction:column; align-items:stretch; }
    .settings-row { flex-direction:column; align-items:flex-start; }
    .btn-generate { width:100%; justify-content:center; }
    .reference-popover { width:280px; right:auto; left:-40px; }
    .ref-grid { grid-template-columns:1fr; }
    .results-list { max-height:320px; }
    .results-actions { gap:4px; }
    .btn-action { padding:6px 10px; font-size:0.7rem; }
    .quick-chip { font-size:0.66rem; padding:4px 8px; }
}