/* ========= Variables ========= */
:root {
    --bg: #0f0f13;
    --bg2: #1a1a24;
    --card: #1e1e2e;
    --text: #e4e4ef;
    --text2: #9a9ab0;
    --primary: #7c5cfc;
    --primary-hover: #6a4af0;
    --green: #34d399;
    --yellow: #fbbf24;
    --red: #f87171;
    --border: #2a2a3e;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

[data-theme="light"] {
    --bg: #f5f5fa;
    --bg2: #eeeef5;
    --card: #ffffff;
    --text: #1a1a2e;
    --text2: #6b6b80;
    --border: #e0e0ec;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* ========= Reset ========= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    transition: background .3s, color .3s;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }

/* ========= Header ========= */
header {
    position: sticky; top: 0; z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 60px;
}

.logo {
    display: flex; align-items: center; gap: 10px;
    font-weight: 700; font-size: 1.15rem; color: var(--text);
}

nav { display: flex; align-items: center; gap: 8px; }

.nav-link {
    padding: 6px 16px; border-radius: 8px;
    font-size: .9rem; font-weight: 500;
    color: var(--text2); transition: all .2s;
}
.nav-link:hover { color: var(--text); text-decoration: none; background: var(--bg2); }
.nav-link.active { color: var(--primary); background: rgba(124,92,252,.1); }

.theme-toggle {
    background: none; border: none; cursor: pointer;
    color: var(--text2); padding: 6px; border-radius: 8px;
    display: flex; align-items: center; transition: color .2s;
}
.theme-toggle:hover { color: var(--text); }

[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ========= Hero ========= */
.hero {
    text-align: center; padding: 48px 0 32px;
}
.hero h1 {
    font-size: 2.2rem; font-weight: 800;
    background: linear-gradient(135deg, var(--primary), #a78bfa);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p { color: var(--text2); font-size: 1.1rem; margin-top: 8px; }

/* ========= Cards ========= */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}
.card h2 { font-size: 1.4rem; margin-bottom: 4px; }
.card h3 { font-size: 1.15rem; margin-bottom: 16px; }
.subtitle { color: var(--text2); margin-bottom: 20px; }

/* ========= Input ========= */
.input-group { display: flex; flex-direction: column; gap: 12px; }

.toggle-input-mode { display: flex; gap: 4px; }
.mode-btn {
    padding: 6px 16px; border: 1px solid var(--border); border-radius: 8px;
    background: transparent; color: var(--text2); cursor: pointer;
    font-size: .85rem; transition: all .2s;
}
.mode-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

textarea, input[type="text"], input[type="url"] {
    width: 100%; padding: 12px 16px;
    background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text);
    font-size: .95rem; font-family: inherit;
    transition: border .2s;
    resize: vertical;
}
textarea:focus, input:focus { outline: none; border-color: var(--primary); }

.help-text { font-size: .8rem; color: var(--text2); }

/* ========= Buttons ========= */
.btn-primary {
    padding: 12px 24px; border: none; border-radius: 8px;
    background: var(--primary); color: #fff;
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: background .2s, transform .1s;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:active { transform: scale(.98); }

.btn-secondary {
    padding: 8px 16px; border: 1px solid var(--border); border-radius: 8px;
    background: transparent; color: var(--text);
    font-size: .85rem; cursor: pointer; transition: all .2s;
}
.btn-secondary:hover { background: var(--bg2); }

/* ========= Score ========= */
.score-card {
    display: flex; align-items: center; gap: 28px;
}
.score-circle { position: relative; width: 110px; height: 110px; flex-shrink: 0; }
.score-circle svg { width: 100%; height: 100%; }
.score-circle span {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    font-size: 2rem; font-weight: 800;
}
.score-info h3 { font-size: 1.3rem; margin-bottom: 4px; }
.score-info p { color: var(--text2); }

/* ========= Tag Results ========= */
.tag-item {
    display: flex; align-items: flex-start; gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}
.tag-item:last-child { border-bottom: none; }

.tag-status {
    width: 10px; height: 10px; border-radius: 50%; margin-top: 6px; flex-shrink: 0;
}
.tag-status.good { background: var(--green); }
.tag-status.warn { background: var(--yellow); }
.tag-status.bad { background: var(--red); }

.tag-name { font-weight: 600; font-size: .9rem; min-width: 140px; color: var(--text2); }
.tag-value {
    font-size: .9rem; word-break: break-all; flex: 1;
    color: var(--text);
}
.tag-value.missing { color: var(--red); font-style: italic; }

/* ========= Recommendations ========= */
#recommendations { list-style: none; }
#recommendations li {
    padding: 10px 0; border-bottom: 1px solid var(--border);
    font-size: .95rem; display: flex; gap: 8px;
}
#recommendations li:last-child { border-bottom: none; }

/* ========= Generator ========= */
.gen-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
    margin-top: 20px;
}
@media (max-width: 700px) {
    .gen-grid { grid-template-columns: 1fr; }
}

.field { margin-bottom: 16px; }
.field label {
    display: flex; justify-content: space-between;
    font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text2);
}
.char-count { font-weight: 400; }

.gen-preview h4 {
    font-size: .9rem; color: var(--text2); margin-bottom: 10px; margin-top: 20px;
}
.gen-preview h4:first-child { margin-top: 0; }

/* Google Preview */
.google-preview {
    background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; padding: 16px;
}
.gp-url { font-size: .8rem; color: var(--green); margin-bottom: 2px; }
.gp-title { font-size: 1.1rem; color: #8ab4f8; font-weight: 500; margin-bottom: 4px; }
.gp-desc { font-size: .85rem; color: var(--text2); }

/* Social Preview */
.social-preview {
    border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
}
.sp-image {
    height: 160px; background: var(--bg2);
    display: flex; align-items: center; justify-content: center;
    color: var(--text2); font-size: .85rem;
    background-size: cover; background-position: center;
}
.sp-info { padding: 12px 16px; }
.sp-site { font-size: .75rem; color: var(--text2); text-transform: uppercase; }
.sp-title { font-size: .95rem; font-weight: 600; margin: 2px 0; }
.sp-desc { font-size: .8rem; color: var(--text2); }

/* ========= Code Output ========= */
.output-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px;
}
.output-header h3 { margin-bottom: 0; }

pre {
    background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; padding: 16px; overflow-x: auto;
    font-size: .85rem; line-height: 1.7;
}
code { font-family: 'SF Mono', 'Fira Code', monospace; color: var(--green); }

/* ========= OG Preview Cards ========= */
.og-card {
    border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
    background: var(--bg);
}
.og-card-image {
    height: 180px; background: var(--bg2);
    display: flex; align-items: center; justify-content: center;
    color: var(--text2); font-size: .85rem;
    background-size: cover; background-position: center;
}
.og-card-body { padding: 12px 16px; }
.og-card-site { font-size: .75rem; color: var(--text2); text-transform: uppercase; }
.og-card-title { font-size: .95rem; font-weight: 600; margin: 2px 0; color: var(--text); }
.og-card-desc { font-size: .8rem; color: var(--text2); margin-top: 2px; }

/* Twitter style */
.og-twitter { position: relative; }
.og-twitter .og-card-image { height: 200px; }
.og-card-body-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 12px 16px; background: linear-gradient(transparent, rgba(0,0,0,.7));
}
.og-card-body-overlay .og-card-title { color: #fff; }
.og-card-body-overlay .og-card-site { color: rgba(255,255,255,.7); }

/* Slack/Discord style */
.og-slack { display: flex; border-radius: 4px; }
.og-slack-bar { width: 4px; background: var(--primary); flex-shrink: 0; }
.og-slack-body { padding: 10px 14px; flex: 1; }
.og-slack .og-card-site { font-weight: 700; font-size: .8rem; color: var(--text); }
.og-slack .og-card-title { color: #1d9bd1; font-size: .9rem; }
.og-slack-thumb {
    width: 80px; height: 80px; margin-top: 8px; border-radius: 4px;
    font-size: .7rem;
}

/* ========= Robots.txt ========= */
.robots-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
    margin-top: 20px;
}
@media (max-width: 700px) {
    .robots-grid { grid-template-columns: 1fr; }
}

.rule-row {
    display: flex; gap: 8px; margin-bottom: 8px; align-items: center;
}
.rule-agent, .rule-directive {
    padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
    background: var(--bg); color: var(--text); font-size: .85rem;
}
.rule-agent { flex: 1.2; }
.rule-directive { width: 100px; }
.rule-path {
    flex: 1; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
    background: var(--bg); color: var(--text); font-size: .85rem;
}
.btn-remove-rule {
    background: none; border: none; color: var(--red); cursor: pointer;
    font-size: 1.1rem; padding: 4px 8px; border-radius: 4px;
}
.btn-remove-rule:hover { background: rgba(248,113,113,.1); }

.preset-btns { display: flex; flex-wrap: wrap; gap: 6px; }
.preset-btn { font-size: .8rem !important; padding: 6px 12px !important; }

.robots-preview h4 {
    font-size: .9rem; color: var(--text2); margin: 0;
}

/* ========= Footer ========= */
footer {
    text-align: center; padding: 32px 0;
    color: var(--text2); font-size: .85rem;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

/* ========= Animations ========= */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn .4s ease; }

/* ========= Mobile ========= */
@media (max-width: 600px) {
    .hero h1 { font-size: 1.6rem; }
    .score-card { flex-direction: column; text-align: center; }
    .tag-item { flex-wrap: wrap; }
    .tag-name { min-width: 100%; }
}