/* ═══════════════════════════════════════════
   ItsMyServer — Main Stylesheet
   ═══════════════════════════════════════════ */

:root {
  --bg:          #0a0f1e;
  --bg-2:        #111827;
  --bg-3:        #1e293b;
  --border:      #1e2d45;
  --text:        #e2e8f0;
  --text-muted:  #94a3b8;
  --text-dim:    #64748b;
  --primary:     #6366f1;
  --primary-h:   #4f46e5;
  --primary-glow:rgba(99,102,241,0.3);
  --accent:      #22d3ee;
  --success:     #22c55e;
  --error:       #ef4444;
  --radius:      12px;
  --radius-lg:   20px;
  --shadow:      0 4px 32px rgba(0,0,0,0.5);
  --font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.hidden{display:none!important}

/* ── Scrollbar ── */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* ── Container ── */
.container{max-width:1100px;margin:0 auto;padding:0 24px}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:all .2s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-h);box-shadow:0 0 20px var(--primary-glow)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:10px}
.btn-full{width:100%;justify-content:center}

/* ── Badge ── */
.badge{display:inline-flex;align-items:center;padding:5px 14px;background:rgba(99,102,241,.15);border:1px solid rgba(99,102,241,.3);border-radius:99px;font-size:13px;font-weight:600;color:var(--primary);letter-spacing:.3px}

/* ── Gradient text ── */
.gradient-text{background:linear-gradient(135deg,#6366f1,#22d3ee);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ═══════════════ NAVBAR ═══════════════ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s,backdrop-filter .3s}
.nav.scrolled{background:rgba(10,15,30,.85);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;gap:32px;max-width:1100px;margin:0 auto;padding:16px 24px}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text)}
.logo svg{flex-shrink:0}
.nav-links{display:flex;gap:28px;margin-left:8px}
.nav-links a{color:var(--text-muted);font-size:14px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .2s}

/* ═══════════════ HERO ═══════════════ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(99,102,241,.2) 0%,transparent 70%);pointer-events:none}
.hero .container{position:relative;text-align:center;display:flex;flex-direction:column;align-items:center;gap:24px}
.hero-title{font-size:clamp(40px,7vw,80px);font-weight:800;line-height:1.1;letter-spacing:-2px}
.hero-sub{font-size:18px;color:var(--text-muted);max-width:520px;line-height:1.7}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.hero-badges{display:flex;gap:20px;flex-wrap:wrap;justify-content:center}
.hero-badges span{font-size:13px;color:var(--text-muted);font-weight:500}
.hero-diagram{display:flex;align-items:center;gap:0;margin-top:20px;background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 40px;backdrop-filter:blur(4px)}
.diagram-node{text-align:center;min-width:120px}
.diagram-icon{font-size:36px;margin-bottom:8px}
.diagram-label{font-size:13px;color:var(--text-muted);line-height:1.4}
.diagram-label small{font-size:11px;color:var(--text-dim)}
.diagram-arrow{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:160px}
.diagram-arrow-label{font-size:11px;color:var(--primary);font-weight:600;letter-spacing:.5px}

/* ═══════════════ SECTIONS ═══════════════ */
.section{padding:96px 0}
.section-dark{background:var(--bg-2)}
.section-header{text-align:center;margin-bottom:64px;display:flex;flex-direction:column;align-items:center;gap:14px}
.section-header h2{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-1px}
.section-header p{color:var(--text-muted);font-size:17px;max-width:480px}

/* ═══════════════ FEATURES ═══════════════ */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}
.feature-card{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:var(--primary);transform:translateY(-4px)}
.feature-icon{font-size:36px;margin-bottom:16px}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.feature-card p{color:var(--text-muted);font-size:14px;line-height:1.7}

/* ═══════════════ STEPS ═══════════════ */
.steps{display:flex;align-items:flex-start;gap:0;overflow-x:auto;padding-bottom:8px}
.step{flex:1;min-width:200px;background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 24px;text-align:center}
.step-num{font-size:36px;font-weight:800;color:var(--primary);opacity:.7;margin-bottom:12px}
.step h3{font-size:17px;font-weight:700;margin-bottom:8px}
.step p{color:var(--text-muted);font-size:14px;line-height:1.6}
.step-line{width:40px;min-width:40px;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));align-self:center;margin:0 -1px;flex-shrink:0}

/* ═══════════════ PRICING ═══════════════ */
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-bottom:28px}
.pricing-card{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;display:flex;flex-direction:column;gap:16px;position:relative;transition:border-color .2s}
.pricing-card:hover{border-color:rgba(99,102,241,.5)}
.pricing-card-popular{border-color:var(--primary);box-shadow:0 0 40px var(--primary-glow)}
.pricing-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--primary);color:#fff;font-size:12px;font-weight:700;padding:4px 14px;border-radius:99px;white-space:nowrap}
.pricing-name{font-size:16px;font-weight:700;color:var(--text-muted)}
.pricing-price{font-size:36px;font-weight:800;color:var(--text)}
.pricing-price span{font-size:16px;font-weight:500;color:var(--text-muted)}
.pricing-sub{font-size:12px;color:var(--text-dim);margin-top:-8px}
.pricing-features{list-style:none;display:flex;flex-direction:column;gap:9px;flex:1}
.pricing-features li{font-size:14px;color:var(--text-muted)}
.pricing-note{text-align:center;font-size:13px;color:var(--text-dim)}

/* ═══════════════ FAQ ═══════════════ */
.faq-list{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius);padding:0;overflow:hidden;transition:border-color .2s}
.faq-item[open]{border-color:rgba(99,102,241,.4)}
.faq-item summary{padding:20px 24px;font-size:16px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'＋';color:var(--primary);font-size:18px;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 24px 20px;color:var(--text-muted);font-size:15px;line-height:1.7}

/* ═══════════════ FOOTER ═══════════════ */
.footer{background:var(--bg-2);border-top:1px solid var(--border);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand p{color:var(--text-muted);font-size:14px;margin:12px 0 16px;line-height:1.6}
.footer-status{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-dim)}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 6px var(--success);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{font-size:13px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.8px;margin-bottom:4px}
.footer-col a{font-size:14px;color:var(--text-dim);transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;text-align:center}
.footer-bottom p{font-size:13px;color:var(--text-dim)}

/* ═══════════════ VIEWER PAGE ═══════════════ */
.viewer-page{position:fixed;inset:0;background:var(--bg);z-index:200;display:flex;flex-direction:column}
.viewer-nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--border);background:rgba(10,15,30,.8);backdrop-filter:blur(12px)}
.viewer-nav-right{display:flex;align-items:center;gap:12px}
.node-status-badge{font-size:13px;font-weight:600;padding:4px 12px;border-radius:99px;border:1px solid}
.node-status-badge.online{color:var(--success);border-color:rgba(34,197,94,.3);background:rgba(34,197,94,.1)}
.node-status-badge.offline{color:var(--text-dim);border-color:var(--border)}
.viewer-content{flex:1;display:flex;align-items:center;justify-content:center}
.viewer-state{text-align:center;padding:40px;display:flex;flex-direction:column;align-items:center;gap:16px}
.viewer-icon{font-size:56px}
.viewer-state h2{font-size:24px;font-weight:700}
.viewer-state p{color:var(--text-muted);max-width:420px;font-size:15px}
.viewer-node-id{font-family:monospace;color:var(--text-dim);font-size:14px;background:var(--bg-3);padding:6px 16px;border-radius:8px;border:1px solid var(--border)}
.viewer-tech-note{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;font-size:13px;color:var(--text-muted);text-align:left;max-width:480px;line-height:1.7}
.viewer-tech-note code{background:rgba(99,102,241,.15);color:var(--primary);padding:2px 6px;border-radius:4px;font-family:monospace}
.viewer-tech-note a{color:var(--primary)}
.viewer-file-info{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px 28px;text-align:left;max-width:520px;width:100%}
.viewer-file-info .file-name{font-size:18px;font-weight:700;margin-bottom:6px;word-break:break-all}
.viewer-file-info .file-meta{font-size:13px;color:var(--text-dim)}
.viewer-file-info .file-preview{margin-top:16px;max-width:100%;border-radius:8px;max-height:400px;object-fit:contain}
.viewer-file-info .file-waiting{color:var(--text-muted);font-size:14px;margin-top:8px;display:flex;align-items:center;gap:8px}

/* Spinner */
.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ═══════════════ MODALS ═══════════════ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(4px);z-index:300;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;width:100%;max-width:420px;position:relative;box-shadow:var(--shadow)}
.modal-close{position:absolute;top:16px;right:16px;background:none;border:none;color:var(--text-dim);font-size:18px;cursor:pointer;padding:4px 8px;border-radius:6px;transition:color .2s}
.modal-close:hover{color:var(--text)}
.modal-pane h2{font-size:24px;font-weight:800;margin-bottom:8px}
.modal-sub{color:var(--text-muted);font-size:14px;margin-bottom:28px}
.modal-sub strong{color:var(--text)}
.modal-switch{text-align:center;font-size:13px;color:var(--text-dim);margin-top:20px}
.modal-switch a{color:var(--primary);font-weight:600}

/* Forms */
.form-group{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.form-group label{font-size:13px;font-weight:600;color:var(--text-muted)}
.form-group input{background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:11px 14px;font-size:15px;color:var(--text);outline:none;transition:border-color .2s;font-family:var(--font)}
.form-group input:focus{border-color:var(--primary)}
.form-group input::placeholder{color:var(--text-dim)}
.code-input{text-align:center;font-size:28px;font-weight:700;letter-spacing:10px;font-family:monospace}
.form-error{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);border-radius:8px;padding:10px 14px;font-size:13px;color:#fca5a5;margin-bottom:8px}
.success-icon{font-size:56px;text-align:center;margin-bottom:4px}

/* ═══════════════ DOWNLOAD ═══════════════ */
.download-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;margin-bottom:28px}
.download-card{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;display:flex;flex-direction:column;gap:16px;transition:border-color .2s,transform .2s}
.download-card:hover:not(.download-card-soon){border-color:var(--primary);transform:translateY(-3px)}
.download-card-featured{border-color:rgba(99,102,241,.4);box-shadow:0 0 32px rgba(99,102,241,.12)}
.download-card-soon{opacity:.6}
.download-platform-icon{width:56px;height:56px;display:flex;align-items:center;justify-content:center}
.download-info{flex:1;display:flex;flex-direction:column;gap:4px}
.download-name{font-size:18px;font-weight:700}
.download-version{font-size:13px;color:var(--text-muted)}
.download-req{font-size:12px;color:var(--text-dim);margin-top:2px}
.download-btn{justify-content:center;gap:8px}
.download-note{display:flex;align-items:flex-start;gap:10px;background:rgba(99,102,241,.08);border:1px solid rgba(99,102,241,.2);border-radius:var(--radius);padding:14px 18px;font-size:14px;color:var(--text-muted);max-width:600px;margin:0 auto}
.download-note svg{flex-shrink:0;margin-top:1px}

/* ═══════════════ RESPONSIVE ═══════════════ */
@media (max-width: 768px) {
  .nav-links,.nav-actions{display:none}
  .hamburger{display:flex;margin-left:auto}
  .nav-links.open{display:flex;flex-direction:column;position:fixed;top:64px;left:0;right:0;background:var(--bg-2);border-bottom:1px solid var(--border);padding:20px 24px;gap:20px}
  .nav-links.open + .nav-actions,
  .nav-actions.open{display:flex;flex-direction:column;position:fixed;top:auto;bottom:0;left:0;right:0;background:var(--bg-2);padding:16px 24px;gap:10px;border-top:1px solid var(--border)}
  .hero-title{letter-spacing:-1px}
  .hero-diagram{flex-direction:column;gap:16px}
  .diagram-arrow{transform:rotate(90deg)}
  .steps{flex-direction:column}
  .step-line{width:2px;height:32px;min-width:2px;align-self:center}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .pricing-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .download-grid{grid-template-columns:1fr}
}

/* ── Viewer File Browser ───────────────────────────────────────────────────── */
.viewer-file-info{background:var(--bg-3);border:1px solid var(--border);border-radius:var(--radius-lg);text-align:left;max-width:660px;width:100%;overflow:hidden}
.browser-header{padding:14px 18px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.03)}
.browser-title{font-size:15px;font-weight:700}
.breadcrumb-row{display:flex;align-items:center;flex-wrap:wrap;gap:4px;font-size:13px}
.bc-item{color:#6366f1;cursor:pointer;padding:2px 4px;border-radius:4px}
.bc-item:hover{background:rgba(99,102,241,.15)}
.bc-sep{color:#475569}
.browser-folders{padding:8px}
.folder-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;cursor:pointer;transition:background .15s;font-size:14px}
.folder-item:hover{background:rgba(255,255,255,.06)}
.folder-item-icon{font-size:18px;flex-shrink:0}
.folder-item-name{flex:1;font-weight:600}
.folder-item-count{font-size:12px;color:#64748b}
.folder-item-arrow{color:#475569;font-size:18px}
.access-tag{font-size:11px;font-weight:600;padding:2px 8px;border-radius:20px}
.access-tag.public{background:rgba(34,197,94,.15);color:#86efac}
.access-tag.password{background:rgba(245,158,11,.15);color:#fde68a}
.browser-table-wrap{overflow-x:auto}
.browser-table{width:100%;border-collapse:collapse;font-size:13px}
.browser-table thead th{padding:9px 14px;text-align:left;font-size:11px;font-weight:600;color:#64748b;text-transform:uppercase;letter-spacing:.4px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.02)}
.browser-table tbody tr{border-bottom:1px solid rgba(255,255,255,.05);transition:background .1s}
.browser-table tbody tr:last-child{border-bottom:none}
.browser-table tbody tr:hover{background:rgba(255,255,255,.05)}
.browser-table td{padding:9px 14px;vertical-align:middle}
.entry-name{cursor:pointer;display:flex;align-items:center;gap:7px;font-weight:500}
.entry-name:hover{color:#6366f1}
.entry-size,.entry-date{color:#64748b;white-space:nowrap}
.action-btn{background:transparent;border:1px solid var(--border);border-radius:6px;color:#94a3b8;padding:4px 8px;font-size:13px;cursor:pointer;transition:all .15s}
.action-btn:hover{border-color:#6366f1;color:#6366f1}