@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,700;1,400&family=Inter:wght@400;500;600;700&display=swap');

/* ─── CSS Variables (Deep Navy + Terminal Green) ─── */
:root {
  --bg:            hsl(230,30%,8%);
  --fg:            hsl(150,20%,90%);
  --border:        hsl(230,25%,18%);
  --card:          hsl(230,25%,12%);
  --card-fg:       hsl(150,20%,90%);
  --primary:       hsl(150,100%,40%);
  --primary-fg:    hsl(230,30%,8%);
  --muted:         hsl(230,25%,15%);
  --muted-fg:      hsl(230,20%,65%);
  --accent:        hsl(230,25%,18%);
  --accent-fg:     hsl(150,100%,40%);
  --sidebar:       hsl(230,30%,6%);
  --sidebar-fg:    hsl(150,20%,85%);
  --sidebar-border:hsl(230,25%,15%);
  --destructive:   hsl(0,80%,60%);
  --destructive-fg:hsl(0,0%,100%);
  --radius:        0.25rem;
  --font-mono:     'JetBrains Mono', monospace;
  --font-sans:     'Inter', sans-serif;
}

/* ─── Reset ─── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;border-color:var(--border)}
body{font-family:var(--font-sans);background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:inherit;text-decoration:none}
button{cursor:pointer;font-family:inherit}
input{font-family:inherit}

/* ─── Scrollbar ─── */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--muted);border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}

/* ─── Layout ─── */
.shell{display:flex;min-height:100vh}
.sidebar{display:flex;flex-direction:column;width:256px;min-width:256px;border-right:1px solid var(--sidebar-border);background:var(--sidebar)}
.sidebar-logo{display:flex;align-items:center;gap:8px;height:64px;padding:0 24px;border-bottom:1px solid var(--sidebar-border);font-family:var(--font-mono);font-weight:700;color:var(--primary);letter-spacing:-0.02em;text-decoration:none}
.sidebar-nav{flex:1;overflow-y:auto;padding:16px 12px}
.sidebar-nav a{display:flex;align-items:center;gap:12px;border-radius:var(--radius);padding:8px 12px;font-size:.875rem;font-weight:500;color:var(--sidebar-fg);transition:background .15s}
.sidebar-nav a:hover{background:hsl(230,25%,12%)}
.sidebar-nav a.active{background:hsl(230,25%,12%);color:var(--accent-fg)}
.sidebar-section-label{padding:0 12px;margin-bottom:8px;font-family:var(--font-mono);font-size:.6rem;color:var(--muted-fg);text-transform:uppercase;letter-spacing:.12em;opacity:.5}
.sidebar-footer{padding:16px;border-top:1px solid var(--sidebar-border);display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.75rem;color:var(--muted-fg)}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--primary);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.main{flex:1;overflow-y:auto}

/* ─── Page ─── */
.page{padding:32px;animation:fadein .4s ease}
@keyframes fadein{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.page-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:32px;gap:16px}
.page-title{font-family:var(--font-mono);font-size:1.875rem;font-weight:700;letter-spacing:-.03em;margin-bottom:6px}
.page-subtitle{color:var(--muted-fg);font-size:.875rem}

/* ─── Card ─── */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.card-header{padding:16px 20px;border-bottom:1px solid var(--border)}
.card-title{font-family:var(--font-mono);font-size:.875rem;font-weight:600;letter-spacing:.05em}
.card-subtitle{font-size:.8rem;color:var(--muted-fg);margin-top:4px}
.card-body{padding:20px}
.card-body-0{padding:0}

/* ─── Metric Cards ─── */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:32px}
@media(max-width:1100px){.metric-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.metric-grid{grid-template-columns:1fr}}
.metric-card{background:color-mix(in srgb,var(--card) 50%,transparent);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.metric-card.primary-accent{border-color:color-mix(in srgb,var(--primary) 20%,transparent)}
.metric-card.danger-accent{border-color:color-mix(in srgb,var(--destructive) 20%,transparent)}
.metric-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;font-family:var(--font-mono);font-size:.8rem;font-weight:500;color:var(--muted-fg)}
.metric-value{font-family:var(--font-mono);font-size:2.5rem;font-weight:700;line-height:1}
.metric-value.green{color:var(--primary)}
.metric-value.red{color:var(--destructive)}
.metric-value.dim{color:var(--accent-fg)}

/* ─── Two-col layout ─── */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:900px){.two-col{grid-template-columns:1fr}}

/* ─── Badge ─── */
.badge{display:inline-flex;align-items:center;gap:4px;border-radius:9999px;padding:2px 10px;font-family:var(--font-mono);font-size:.65rem;font-weight:600;border:1px solid var(--border);color:var(--fg);background:transparent;white-space:nowrap}
.badge-ai{background:color-mix(in srgb,#6366f1 20%,transparent);color:#a5b4fc;border-color:color-mix(in srgb,#6366f1 30%,transparent)}
.badge-outline{background:var(--bg);color:var(--fg)}
.badge-secondary{background:hsl(230,25%,20%);color:var(--fg);border-color:hsl(230,25%,25%)}
.badge-warning{background:color-mix(in srgb,#f59e0b 20%,transparent);color:#fcd34d;border-color:color-mix(in srgb,#f59e0b 30%,transparent)}

/* ─── Button ─── */
.btn{display:inline-flex;align-items:center;gap:6px;border-radius:var(--radius);padding:8px 14px;font-family:var(--font-mono);font-size:.75rem;font-weight:500;border:1px solid transparent;transition:all .15s;white-space:nowrap}
.btn-primary{background:var(--primary);color:var(--primary-fg);border-color:var(--primary)}
.btn-primary:hover{opacity:.85}
.btn-outline{background:transparent;color:var(--fg);border-color:var(--border)}
.btn-outline:hover{background:var(--accent)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--muted-fg)}
.btn-ghost:hover{background:var(--accent);color:var(--fg)}
.btn-danger-outline{background:transparent;border-color:var(--destructive);color:var(--destructive)}
.btn-danger-outline:hover{background:color-mix(in srgb,var(--destructive) 10%,transparent)}
.btn-sm{padding:5px 10px;font-size:.7rem}
.btn-icon{padding:6px;width:32px;height:32px;justify-content:center}
.btn:disabled{opacity:.5;pointer-events:none}

/* ─── Input ─── */
.search-bar{display:flex;align-items:center;gap:8px;padding:10px 16px;background:color-mix(in srgb,var(--muted) 30%,transparent);border-bottom:1px solid var(--border)}
.search-input{flex:1;background:transparent;border:none;outline:none;font-family:var(--font-mono);font-size:.875rem;color:var(--fg)}
.search-input::placeholder{color:var(--muted-fg)}

/* ─── File list ─── */
.file-row{display:flex;align-items:center;padding:16px;gap:16px;border-bottom:1px solid var(--border);transition:background .15s}
.file-row:hover{background:color-mix(in srgb,var(--accent) 5%,transparent)}
.file-icon-wrap{padding:8px;background:var(--muted);border-radius:var(--radius);color:var(--muted-fg);flex-shrink:0}
.file-info{flex:1;min-width:0}
.file-name{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.875rem;font-weight:500}
.file-path{font-family:var(--font-mono);font-size:.7rem;color:var(--muted-fg);margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-meta{text-align:right;font-family:var(--font-mono);font-size:.7rem;color:var(--muted-fg);flex-shrink:0}
.file-actions{display:flex;gap:10px;flex-shrink:0}
.lang-badge{font-family:var(--font-mono);font-size:.6rem;padding:1px 6px;border-radius:2px;border:1px solid}
.lang-php{color:#818cf8;border-color:rgba(129,140,248,.3);background:rgba(129,140,248,.1)}
.lang-html{color:#fb923c;border-color:rgba(251,146,60,.3);background:rgba(251,146,60,.1)}
.lang-css{color:#60a5fa;border-color:rgba(96,165,250,.3);background:rgba(96,165,250,.1)}
.lang-javascript{color:#facc15;border-color:rgba(250,204,21,.3);background:rgba(250,204,21,.1)}
.lang-typescript{color:#22d3ee;border-color:rgba(34,211,238,.3);background:rgba(34,211,238,.1)}

/* ─── Activity list ─── */
.activity-row{display:flex;gap:16px;padding:16px;border-bottom:1px solid var(--border);transition:background .15s}
.activity-row:hover{background:color-mix(in srgb,var(--accent) 5%,transparent)}
.activity-icon{margin-top:2px;flex-shrink:0}
.activity-path{font-family:var(--font-mono);font-size:.875rem}
.activity-desc{font-size:.875rem;color:var(--muted-fg);margin-top:3px}
.activity-time{font-size:.7rem;color:var(--muted-fg);white-space:nowrap}

/* ─── System log ─── */
.syslog{font-family:var(--font-mono);font-size:.75rem;color:var(--muted-fg);background:rgba(0,0,0,.4);padding:16px;overflow:auto;flex:1}
.syslog p{margin-bottom:8px}
.syslog .ok{color:var(--primary)}
.syslog .warn{color:#facc15}
.syslog .prompt{color:var(--primary)}

/* ─── Analyze ─── */
.analyze-ready{padding:48px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:24px}
.analyze-icon-wrap{width:80px;height:80px;border-radius:50%;background:color-mix(in srgb,var(--primary) 10%,transparent);display:flex;align-items:center;justify-content:center}
.score-ring-wrap{position:relative;width:128px;height:128px}
.score-ring-wrap svg{width:100%;height:100%}
.score-label{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.score-value{font-family:var(--font-mono);font-size:2rem;font-weight:700}
.score-unit{font-family:var(--font-mono);font-size:.6rem;color:var(--muted-fg)}
.issues-list{border-top:1px solid var(--border)}
.issue-row{display:flex;gap:14px;padding:16px;border-bottom:1px solid var(--border);transition:background .15s}
.issue-row:hover{background:color-mix(in srgb,var(--accent) 5%,transparent)}
.issue-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.issue-msg{font-size:.875rem;font-weight:500}

/* ─── Improve (full-screen diff) ─── */
.improve-shell{display:flex;flex-direction:column;height:100vh}
.improve-header{flex-shrink:0;padding:20px 24px;border-bottom:1px solid var(--border);background:var(--card);display:flex;align-items:center;justify-content:space-between;gap:16px}
.improve-header-left{display:flex;align-items:center;gap:14px}
.improve-header-right{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.improve-body{flex:1;overflow:hidden;display:flex;flex-direction:column;padding:24px;gap:16px}
.improve-title{font-family:var(--font-mono);font-weight:700;font-size:1.1rem}
.improve-path{font-family:var(--font-mono);font-size:.8rem;color:var(--muted-fg)}
.summary-card{border:1px solid color-mix(in srgb,var(--primary) 20%,transparent);background:color-mix(in srgb,var(--primary) 5%,transparent);border-radius:var(--radius);padding:16px;display:flex;gap:14px;align-items:flex-start;flex-shrink:0}
.summary-title{font-family:var(--font-mono);font-size:.875rem;font-weight:700}
.summary-desc{font-size:.875rem;color:var(--muted-fg);margin-top:4px}
.diff-container{flex:1;overflow:auto;border-radius:var(--radius);border:1px solid var(--border);background:#000}
.diff-header{display:flex;position:sticky;top:0;z-index:10;background:var(--card);border-bottom:1px solid var(--border);font-family:var(--font-mono);font-size:.7rem;font-weight:700;color:var(--muted-fg)}
.diff-header-left{width:50%;padding:8px 16px;border-right:1px solid var(--border);text-transform:uppercase;letter-spacing:.05em}
.diff-header-right{width:50%;padding:8px 16px;text-transform:uppercase;letter-spacing:.05em;color:var(--primary)}
.diff-row{display:flex;font-family:var(--font-mono);font-size:.8rem;line-height:1.4}
.diff-row:hover{background:rgba(255,255,255,.03)}
.diff-cell{display:flex;width:50%}
.diff-cell-left{border-right:1px solid var(--border)}
.diff-lineno{width:48px;min-width:48px;text-align:right;padding:2px 12px;user-select:none;opacity:.5;background:rgba(0,0,0,.2);color:var(--muted-fg);font-size:.7rem}
.diff-code{padding:2px 14px;white-space:pre;overflow-x:auto;width:100%;color:var(--muted-fg)}
.diff-changed .diff-cell-left{background:rgba(242,79,79,.1)}
.diff-changed .diff-cell-left .diff-code{color:var(--fg)}
.diff-changed .diff-cell-right{background:color-mix(in srgb,var(--primary) 10%,transparent)}
.diff-changed .diff-cell-right .diff-code{color:var(--fg)}
.divider{width:1px;height:24px;background:var(--border)}

/* ─── Loading ─── */
.loading-center{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:70vh;gap:24px;text-align:center}
.spin{animation:spin 1.2s linear infinite}
.ping-ring{position:absolute;inset:0;border:4px solid var(--primary);border-radius:50%;animation:ping 1.4s ease-out infinite;opacity:.2}
.generate-title{font-family:var(--font-mono);font-size:1.25rem;font-weight:700;color:var(--primary)}
.generate-sub{font-family:var(--font-mono);font-size:.8rem;color:var(--muted-fg);max-width:420px;margin-top:6px}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes ping{0%{transform:scale(1);opacity:.3}80%,100%{transform:scale(2);opacity:0}}

/* ─── History Timeline ─── */
.history-wrapper{max-width:860px;margin:0 auto}
.timeline{position:relative;padding-bottom:40px}
.timeline::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,transparent,var(--border) 10%,var(--border) 90%,transparent);transform:translateX(-50%)}
.timeline-item{display:flex;align-items:center;margin-bottom:32px;position:relative;min-height:80px}
.timeline-item:nth-child(odd) .timeline-card{margin-left:auto}
.timeline-dot{width:40px;height:40px;border-radius:50%;border:4px solid var(--bg);background:var(--card);display:flex;align-items:center;justify-content:center;flex-shrink:0;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:10;transition:border-color .2s}
.timeline-item:hover .timeline-dot{border-color:color-mix(in srgb,var(--primary) 50%,transparent)}
.timeline-card{width:calc(50% - 36px);background:color-mix(in srgb,var(--card) 80%,transparent);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:border-color .2s;backdrop-filter:blur(4px)}
.timeline-item:hover .timeline-card{border-color:color-mix(in srgb,var(--primary) 50%,transparent)}
.timeline-card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.timeline-filename{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.8rem;font-weight:700;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.timeline-desc{font-size:.8rem;color:var(--muted-fg);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.timeline-card-foot{border-top:1px solid var(--border);padding-top:14px;margin-top:14px;display:flex;justify-content:flex-end}
.history-empty{padding:80px 0;text-align:center;position:relative;z-index:10}
.history-empty-icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;background:var(--card);border:1px solid var(--border);margin-bottom:16px}

/* ─── Toast ─── */
.toast-container{position:fixed;bottom:24px;right:24px;z-index:1000;display:flex;flex-direction:column;gap:8px}
.toast{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:14px 18px;font-size:.875rem;min-width:240px;animation:slidein .25s ease}
.toast.success{border-color:color-mix(in srgb,var(--primary) 40%,transparent)}
.toast.error{border-color:color-mix(in srgb,var(--destructive) 40%,transparent)}
@keyframes slidein{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:none}}
.hidden{display:none}

/* ─── Icon helpers ─── */
svg.icon{display:inline-block;vertical-align:middle}