/* Legacy variable compat for old tool pages */
:root { --card-bg: var(--surface); --text-light: var(--text-3); --radius: 6px; --radius-lg: 10px; }
[data-theme="dark"] { --card-bg: var(--surface); --text-light: var(--text-3); }

/* tools.css - v2 统一风格 */
:root {
    --bg: #f6f5f1;
    --surface: #ffffff;
    --surface-2: #edecea;
    --text: #1a1917;
    --text-2: #52504b;
    --text-3: #918e87;
    --accent: #0f766e;
    --accent-2: #14b8a6;
    --accent-glow: rgba(15, 118, 110, 0.08);
    --border: #e2e0da;
    --border-2: #cfccc4;
    --mono-bg: #1a1917;
    --mono-text: #e8e6e1;
    --shadow: 0 2px 8px rgba(0,0,0,.05);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.08);
    --radius: 6px;
    --font: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: "JetBrains Mono", "Fira Code", Consolas, monospace;
    --max-w: 1280px;
}
[data-theme="dark"] {
    --bg: #131311;
    --surface: #1e1e1c;
    --surface-2: #282826;
    --text: #edecea;
    --text-2: #b8b5ae;
    --text-3: #737069;
    --accent: #2dd4bf;
    --accent-2: #5eead4;
    --accent-glow: rgba(45, 212, 191, 0.08);
    --border: #2e2e2b;
    --border-2: #3e3e3a;
    --mono-bg: #0a0a09;
    --mono-text: #d4d2cc;
    --shadow: 0 2px 8px rgba(0,0,0,.2);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.3);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font); background: var(--bg); color: var(--text);
    line-height: 1.8; font-size: 17px; -webkit-font-smoothing: antialiased;
    background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
    background-size: 32px 32px;
}
a { color: inherit; text-decoration: none; }
.site-header button, .site-footer button, .theme-toggle { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: var(--text); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.header-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; height: 60px; display: flex; align-items: center; justify-content: space-between; }
.site-brand { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 18px; letter-spacing: -0.5px; }
.brand-slash { font-family: var(--mono); color: var(--accent); font-weight: 700; font-size: 20px; }
.site-nav { display: flex; gap: 2px; font-family: var(--mono); font-size: 15px; }
.site-nav a { padding: 6px 14px; border-radius: 4px; color: var(--text-3); transition: all .15s; }
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a.active { color: var(--accent); font-weight: 700; }
.site-nav a::before { content: '/ '; opacity: .4; }

/* Tool Hero */
.tool-hero { text-align: center; padding: 48px 28px 32px; }
.tool-hero-icon { font-size: 40px; margin-bottom: 12px; }
.tool-hero h1 { font-size: 28px; font-weight: 900; letter-spacing: -1px; margin-bottom: 8px; }
.tool-hero p { font-size: 15px; color: var(--text-3); max-width: 500px; margin: 0 auto; }

/* Tool Main */
.tool-main { max-width: var(--max-w); margin: 0 auto; padding: 0 28px 64px; }

/* Tool Container & Cards */
.tool-container { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 24px; margin-bottom: 20px; }

/* Inputs */
input[type="text"], input[type="number"], input[type="url"], input[type="email"],
input[type="password"], input[type="search"], textarea, select {
    width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius);
    background: var(--bg); color: var(--text); font-size: 15px; outline: none; transition: border-color .15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
textarea { min-height: 120px; resize: vertical; font-family: var(--mono); font-size: 14px; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); width: auto; }
label { font-size: 14px; color: var(--text-2); cursor: pointer; display: flex; align-items: center; gap: 6px; }

/* Buttons */
.btn, button[type="submit"], .tool-btn {
    padding: 10px 20px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
    background: var(--accent); color: #fff; border: none; cursor: pointer; transition: all .15s;
}
.btn:hover, button[type="submit"]:hover, .tool-btn:hover { opacity: .9; }
.btn-secondary, .btn-ghost {
    background: transparent; border: 1px solid var(--border); color: var(--text-2);
}
.btn-secondary:hover, .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Output areas */
.output, .result, pre, code, .code-output {
    font-family: var(--mono); font-size: 14px; line-height: 1.6;
    background: var(--mono-bg); color: var(--mono-text);
    padding: 16px; border-radius: var(--radius); overflow-x: auto;
    white-space: pre-wrap; word-break: break-all;
}

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--surface-2); font-weight: 600; font-size: 13px; }

/* Tool grid (index page) */
.tools-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; padding: 20px 0; }
.tool-card {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    padding: 24px 16px; background: var(--surface); border: 1px solid var(--border);
    border-radius: 10px; text-align: center; transition: all .2s; text-decoration: none; color: var(--text);
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.tool-card-icon { font-size: 28px; }
.tool-card-name { font-size: 14px; font-weight: 600; }
.tool-card-desc { font-size: 12px; color: var(--text-3); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* Footer */
.site-footer { margin-top: 0; padding: 36px 0; border-top: 2px solid var(--text); }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; display: flex; justify-content: space-between; align-items: flex-end; }
.footer-brand { font-weight: 900; font-size: 16px; }
.footer-brand .sub { font-family: var(--mono); font-size: 13px; font-weight: 400; color: var(--text-3); margin-top: 4px; display: block; }
.footer-links { font-family: var(--mono); font-size: 14px; color: var(--text-3); display: flex; gap: 16px; }
.footer-links a:hover { color: var(--accent); }

/* Theme Toggle */
.theme-toggle { position: fixed; bottom: 24px; right: 24px; z-index: 99; width: 44px; height: 44px; border-radius: 8px; background: var(--mono-bg); color: var(--mono-text); display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: var(--shadow-lg); transition: all .15s; font-family: var(--mono); }
.theme-toggle:hover { transform: scale(1.05); }

/* Utility */
.copy-btn { padding: 6px 12px; border-radius: 4px; font-size: 12px; font-weight: 600; border: 1px solid var(--border); background: var(--surface); color: var(--text-2); cursor: pointer; transition: all .15s; }
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.hidden { display: none !important; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mb-16 { margin-bottom: 16px; }

/* Responsive */
@media (max-width: 1100px) { .tools-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) {
    .header-inner { padding: 0 16px; }
    .tool-main { padding: 0 16px 48px; }
    .tool-hero { padding: 32px 16px 24px; }
    .tools-grid { grid-template-columns: 1fr 1fr; }
    .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
    .site-nav a::before { display: none; }
}
@media (max-width: 480px) { .tools-grid { grid-template-columns: 1fr 1fr; } }

/* === Base element styles for tool pages === */
button { font-family: var(--font); cursor: pointer; }
.tool-container { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 24px; margin-bottom: 20px; }
.tool-container input[type='text'],
.tool-container input[type='number'],
.tool-container input[type='url'],
.tool-container input[type='email'],
.tool-container input[type='password'],
.tool-container textarea,
.tool-container select {
    width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius);
    background: var(--bg); color: var(--text); font-size: 15px; outline: none; transition: border-color .15s;
    font-family: var(--font);
}
.tool-container input:focus, .tool-container textarea:focus, .tool-container select:focus {
    border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.tool-container textarea { min-height: 120px; resize: vertical; font-family: var(--mono); font-size: 14px; }
.tool-container label { font-size: 14px; color: var(--text-2); cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
.tool-container input[type='checkbox'], .tool-container input[type='radio'] { accent-color: var(--accent); width: auto; }
.tool-container input[type='range'] { width: 100%; accent-color: var(--accent); }
.tool-container table { width: 100%; border-collapse: collapse; font-size: 14px; }
.tool-container th, .tool-container td { padding: 10px 12px; border: 1px solid var(--border); text-align: left; }
.tool-container th { background: var(--surface-2); font-weight: 600; }
.tool-container .btn, .tool-container .action-btn {
    padding: 10px 20px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
    background: var(--accent); color: #fff; border: none; cursor: pointer; transition: all .15s;
}
.tool-container .btn:hover, .tool-container .action-btn:hover { opacity: .9; }
.tool-container .btn-secondary { background: var(--surface); color: var(--text-2); border: 1px solid var(--border); }
.tool-container pre, .tool-container code { font-family: var(--mono); font-size: 14px; }
.tool-container pre { background: var(--mono-bg); color: var(--mono-text); padding: 16px; border-radius: 8px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.tool-container code { background: var(--surface-2); padding: 2px 6px; border-radius: 4px; }
.tool-container .output, .tool-container .result { background: var(--surface-2); padding: 16px; border-radius: 8px; font-family: var(--mono); font-size: 14px; word-break: break-all; white-space: pre-wrap; }

/* === Fix: tool-card-body must be block for tool layouts === */
.tool-card-body { display: block !important; width: 100%; }
.tool-container { width: 100%; box-sizing: border-box; }
.tool-container * { box-sizing: border-box; }