/* ===== Reset ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;overflow:hidden}
body{font-family:'Segoe UI Variable','Segoe UI',Tahoma,sans-serif;font-size:13px;user-select:none;background:#000}

/* ===== Boot Screen ===== */
.boot-screen{position:fixed;inset:0;z-index:9999;background:#000;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:opacity .8s}
.boot-screen.hidden{opacity:0;pointer-events:none}
.win-logo-boot{display:grid;grid-template-columns:1fr 1fr;gap:4px}
.wl-quad{width:28px;height:28px;border-radius:3px;animation:orbPulse 2s ease-in-out infinite}
.wl-red{background:#f25022;animation-delay:0s}
.wl-green{background:#7fba00;animation-delay:.15s}
.wl-blue{background:#00a4ef;animation-delay:.3s}
.wl-yellow{background:#ffb900;animation-delay:.45s}
@keyframes orbPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.15);opacity:.7}}
.boot-dots{margin-top:40px;display:flex;gap:8px}
.boot-dots span{width:8px;height:8px;border-radius:50%;background:#fff;animation:dotBounce 1.4s ease-in-out infinite}
.boot-dots span:nth-child(1){animation-delay:0s}
.boot-dots span:nth-child(2){animation-delay:.15s}
.boot-dots span:nth-child(3){animation-delay:.3s}
.boot-dots span:nth-child(4){animation-delay:.45s}
.boot-dots span:nth-child(5){animation-delay:.6s}
@keyframes dotBounce{0%,80%,100%{opacity:.2;transform:scale(.8)}40%{opacity:1;transform:scale(1.2)}}

/* ===== Desktop — Win7 wallpaper ===== */
.desktop{
    position:fixed;inset:0;bottom:48px;
    background:
        radial-gradient(ellipse 120% 80% at 80% 90%, rgba(255,255,255,0.08) 0%, transparent 60%),
        radial-gradient(ellipse 100% 60% at 50% 110%, rgba(100,180,255,0.15) 0%, transparent 50%),
        linear-gradient(170deg, #0b3d91 0%, #1565c0 25%, #1e88e5 45%, #2196f3 55%, #0d47a1 80%, #0a2e6e 100%);
    opacity:0;transition:opacity .6s;overflow:hidden;
}
/* Light sweep arc at bottom — like Win7 */
.desktop::after{
    content:'';position:absolute;bottom:-30%;left:-10%;
    width:120%;height:70%;
    background:radial-gradient(ellipse at 50% 100%, rgba(255,255,255,0.07) 0%, transparent 70%);
    pointer-events:none;
}
.desktop.visible{opacity:1}

/* ===== Desktop Icons ===== */
.desktop-icons{display:flex;flex-direction:column;flex-wrap:wrap;gap:6px;padding:16px;align-content:flex-start;height:calc(100vh - 48px)}
.desktop-icon{width:76px;display:flex;flex-direction:column;align-items:center;gap:4px;padding:6px 4px;border-radius:4px;cursor:pointer;transition:background .15s}
.desktop-icon:hover{background:rgba(255,255,255,0.15)}
.desktop-icon span{color:#fff;font-size:11px;text-align:center;text-shadow:1px 1px 4px rgba(0,0,0,0.9),0 0 8px rgba(0,0,0,0.5);line-height:1.3;word-break:break-word}
.di-icon{width:40px;height:40px;display:flex;align-items:center;justify-content:center}

/* ===== Windows ===== */
.window{position:absolute;display:none;background:#f1f1f1;border-radius:6px;box-shadow:0 8px 32px rgba(0,0,0,0.5),0 0 0 1px rgba(0,0,0,0.15);flex-direction:column;min-width:300px;min-height:200px;overflow:hidden;z-index:10}
.window.open{display:flex;animation:winOpen .2s ease-out}
.window.maximized{top:0!important;left:0!important;width:100%!important;height:calc(100vh - 48px)!important;border-radius:0}
@keyframes winOpen{from{transform:scale(.92);opacity:0}to{transform:scale(1);opacity:1}}

/* Titlebar — glass effect */
.window-titlebar{
    display:flex;align-items:center;justify-content:space-between;
    padding:6px 8px;min-height:32px;cursor:move;
    background:linear-gradient(180deg,rgba(220,232,248,0.95),rgba(190,210,240,0.9));
    border-bottom:1px solid #b0c4de;
    border-radius:6px 6px 0 0;
}
.window.focused .window-titlebar{background:linear-gradient(180deg,rgba(200,220,248,0.98),rgba(170,200,240,0.95))}
.window:not(.focused) .window-titlebar{background:linear-gradient(180deg,rgba(230,230,230,0.95),rgba(215,215,215,0.9))}
.titlebar-dark{background:linear-gradient(180deg,#444,#333)!important;border-bottom-color:#222}
.window.focused .titlebar-dark{background:linear-gradient(180deg,#444,#333)!important}

.window-title{display:flex;align-items:center;gap:6px;font-size:12px;color:#222;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.titlebar-dark .window-title{color:#ddd}
.wt-icon{font-size:14px}

/* Win buttons */
.window-controls{display:flex;gap:1px;flex-shrink:0}
.win-btn{width:28px;height:22px;border:none;border-radius:3px;cursor:pointer;display:flex;align-items:center;justify-content:center;background:transparent;transition:background .1s}
.win-minimize:hover{background:rgba(0,0,0,0.08)}
.win-maximize:hover{background:rgba(0,0,0,0.08)}
.win-close{background:transparent}
.win-close:hover{background:#e81123}

/* Toolbar */
.window-toolbar{display:flex;align-items:center;gap:6px;padding:4px 8px;background:#f8f9fb;border-bottom:1px solid #ddd;min-height:30px}
.toolbar-btns{display:flex;gap:2px}
.tb-btn{width:24px;height:24px;border:1px solid #ccc;border-radius:3px;background:#fff;cursor:pointer;font-size:12px;color:#555;display:flex;align-items:center;justify-content:center}
.tb-btn:hover{background:#e8eef7}
.toolbar-path{flex:1;background:#fff;border:1px solid #ccc;border-radius:3px;padding:3px 10px;font-size:12px;color:#444;display:flex;align-items:center;gap:4px}
.tp-icon{font-size:13px}

/* Menu bar */
.window-menubar{display:flex;background:#f5f5f5;border-bottom:1px solid #ddd;padding:1px 4px}
.window-menubar span{padding:3px 10px;font-size:12px;color:#333;cursor:pointer;border-radius:2px}
.window-menubar span:hover{background:#e0e8f5}

/* Body */
.window-body{flex:1;overflow:auto;background:#fff}

/* ===== About ===== */
.about-card{display:flex;gap:24px;padding:28px;align-items:flex-start}
.about-avatar{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#4a90d9,#1565c0);color:#fff;font-size:28px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 16px rgba(0,0,0,0.2)}
.about-info h2{font-size:20px;color:#1a1a2e;margin-bottom:2px}
.about-role{color:#1976d2;font-weight:600;margin-bottom:14px;font-size:13px}
.about-desc{color:#555;line-height:1.65;margin-bottom:8px;font-size:12.5px}
.about-meta{margin-top:16px;display:flex;flex-direction:column;gap:6px}
.meta-item{font-size:12px;color:#555}
.meta-label{font-weight:600;color:#333;margin-right:4px}
.status-available{color:#2e7d32;font-weight:600}

/* ===== Explorer ===== */
.window-body:has(.explorer-sidebar){display:flex}
.explorer-sidebar{width:160px;background:#eaf1fb;border-right:1px solid #d0dae8;padding:8px 0;flex-shrink:0;overflow-y:auto}
.sidebar-section{margin-bottom:4px}
.sidebar-item{padding:4px 10px;font-size:12px;color:#333;cursor:pointer;display:flex;align-items:center;gap:4px}
.sidebar-item:hover{background:#d8e4f5}
.sidebar-item.active{color:#0055cc;font-weight:600}
.sidebar-item.sub{padding-left:28px}
.si-arrow{font-size:8px;color:#888}
.explorer-content{flex:1;padding:16px;position:relative;overflow:auto}
.file-grid{display:flex;flex-wrap:wrap;gap:12px}
.file-item{width:80px;display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 4px;cursor:pointer;border-radius:4px}
.file-item:hover{background:#e0eaf7}
.file-item span{font-size:11px;text-align:center;color:#222;word-break:break-word}

/* Project Detail */
.project-detail{display:none;position:absolute;inset:0;background:#fff;padding:16px;flex-direction:column;overflow-y:auto}
.project-detail.show{display:flex}
.detail-back{background:#eaf1fb;border:1px solid #c0c8d5;border-radius:4px;padding:4px 14px;font-size:12px;cursor:pointer;align-self:flex-start;margin-bottom:12px;color:#333}
.detail-back:hover{background:#d8e4f5}
.detail-content h3{font-size:16px;color:#1a1a2e;margin-bottom:8px}
.detail-content p{font-size:12px;color:#555;line-height:1.6;margin-bottom:8px}
.detail-tags{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.detail-tags span{font-size:11px;padding:2px 10px;background:#e0eaf7;color:#1565c0;border-radius:12px;font-weight:500}
.detail-links{display:flex;gap:12px;margin-top:12px}
.detail-links a{font-size:12px;color:#1565c0;text-decoration:none;font-weight:600}
.detail-links a:hover{text-decoration:underline}

/* ===== Terminal ===== */
.terminal-body{background:#0c0c0c!important}
.terminal{padding:12px;font-family:'Consolas','Courier New',monospace;font-size:13px;color:#ccc;line-height:1.5}
.tl{white-space:pre}
.tc{color:#0f0;font-weight:bold}
.ts{display:flex;gap:8px;margin:1px 0}
.tb{color:#0f0;min-width:120px;display:inline-block}
.tp{color:#0a0;font-size:12px}
.cursor{animation:blink 1s step-end infinite;color:#0f0}
@keyframes blink{50%{opacity:0}}

/* ===== Contact ===== */
.contact-list{display:flex;flex-direction:column}
.contact-item{display:flex;align-items:center;gap:14px;padding:14px 20px;border-bottom:1px solid #f0f0f0;text-decoration:none;color:inherit;transition:background .15s}
.contact-item:hover{background:#eaf3ff}
.ci-icon{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;color:#fff;flex-shrink:0}
.ci-linkedin{background:#0077b5}
.ci-github{background:#24292e}
.ci-telegram{background:#0088cc}
.ci-email{background:#ea4335;font-size:20px}
.ci-info{flex:1}
.ci-name{font-size:13px;font-weight:600;color:#222}
.ci-val{font-size:12px;color:#666;margin-top:1px}
.ci-arrow{color:#bbb;font-size:18px}

/* ===== Notepad ===== */
.notepad-body{background:#fff!important}
.notepad-text{font-family:'Consolas','Courier New',monospace;font-size:13px;color:#222;padding:12px 16px;line-height:1.5;white-space:pre;margin:0}

/* ===== Taskbar ===== */
.taskbar{
    position:fixed;bottom:0;left:0;right:0;height:48px;
    background:linear-gradient(180deg,rgba(50,80,130,0.92),rgba(30,60,110,0.95));
    backdrop-filter:blur(20px);
    display:flex;align-items:center;padding:0 6px;z-index:50;
    border-top:1px solid rgba(255,255,255,0.1);
    opacity:0;transition:opacity .5s;
}
.taskbar.visible{opacity:1}

/* Start button */
.start-btn{
    width:44px;height:44px;border:none;border-radius:0;cursor:pointer;
    background:transparent;display:flex;align-items:center;justify-content:center;
    transition:background .15s;padding:0;
}
.start-btn:hover{background:rgba(255,255,255,0.1)}
.start-btn:active{background:rgba(255,255,255,0.15)}
.start-win-logo{display:grid;grid-template-columns:1fr 1fr;gap:1.5px}
.sw-q{width:9px;height:9px;border-radius:1.5px}
.sw-r{background:#f25022}
.sw-g{background:#7fba00}
.sw-b{background:#00a4ef}
.sw-y{background:#ffb900}

/* Taskbar items */
.taskbar-items{flex:1;display:flex;gap:2px;padding:0 6px;overflow:hidden}
.taskbar-item{
    display:flex;align-items:center;gap:6px;
    padding:4px 12px;height:36px;border-radius:4px;
    background:rgba(255,255,255,0.08);
    color:#fff;font-size:11px;cursor:pointer;
    max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
    transition:background .15s;
}
.taskbar-item:hover{background:rgba(255,255,255,0.16)}
.taskbar-item.active{background:rgba(255,255,255,0.2);border-bottom:2px solid #76b9ed}
.taskbar-item-icon{width:16px;height:16px;border-radius:2px;flex-shrink:0}

/* System tray */
.system-tray{display:flex;align-items:center;gap:10px;padding:0 12px;height:100%;border-left:1px solid rgba(255,255,255,0.1)}
.tray-icons{display:flex;gap:6px;opacity:0.7}
.tray-datetime{display:flex;flex-direction:column;align-items:flex-end;line-height:1.2}
.tray-clock{color:#fff;font-size:12px}
.tray-date{color:rgba(255,255,255,0.7);font-size:11px}

/* ===== Start Menu — Classic Win7 ===== */
.start-menu{
    position:fixed;bottom:48px;left:0;
    width:420px;
    border:1px solid rgba(100,140,200,0.6);
    border-radius:8px 8px 0 0;
    box-shadow:0 -4px 40px rgba(0,0,0,0.5);
    z-index:100;display:none;flex-direction:column;overflow:hidden;
    background:rgba(230,238,250,0.97);
    backdrop-filter:blur(12px);
}
.start-menu.open{display:flex;animation:menuSlide .2s ease-out}
@keyframes menuSlide{from{transform:translateY(8px);opacity:0}to{transform:translateY(0);opacity:1}}

/* Banner — user area */
.sm-banner{
    display:flex;align-items:center;gap:12px;
    padding:12px 14px;
    background:linear-gradient(180deg,#3b7dd8 0%,#245aa5 100%);
    border-bottom:1px solid #1e4a8e;
}
.sm-avatar{width:44px;height:44px;border-radius:6px;background:linear-gradient(135deg,#4fc3f7,#0288d1);color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;border:2px solid rgba(255,255,255,0.5);box-shadow:0 2px 8px rgba(0,0,0,0.25)}
.sm-username{color:#fff;font-size:14px;font-weight:600;text-shadow:0 1px 3px rgba(0,0,0,0.4)}

/* Body */
.sm-body{display:flex;min-height:320px}

/* Left: program list */
.sm-left{flex:1;background:#fff;padding:6px 0;overflow-y:auto;border-right:1px solid #d0d8e4}
.sm-prog{display:flex;align-items:center;gap:10px;padding:5px 14px;font-size:12px;color:#222;cursor:pointer;transition:background .1s}
.sm-prog:hover{background:#3399ff;color:#fff}
.sm-prog:hover .sp-icon{filter:brightness(1.3)}
.sp-icon{width:24px;height:24px;border-radius:4px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}
.sp-blue{background:#42a5f5}
.sp-yellow{background:#fdd835}
.sp-dark{background:#37474f;color:#fff}
.sp-purple{background:#7e57c2}
.sp-white{background:#e8eef7;border:1px solid #ccd}
.sp-linkedin{background:#0077b5;color:#fff;font-weight:700;font-size:12px}
.sp-tg{background:#0088cc;color:#fff}
.sp-back{background:#ddd;color:#666;font-size:10px}
.sm-separator{height:1px;background:#e0e0e0;margin:4px 14px}
.sm-back{color:#888;font-size:11px}

/* Right: places */
.sm-right{width:170px;background:linear-gradient(180deg,#e4ecf7 0%,#d0dcea 100%);padding:8px 0}
.sm-place{padding:6px 16px;font-size:12px;color:#1a3a6a;cursor:pointer;transition:background .1s;font-weight:500}
.sm-place:hover{background:rgba(60,110,180,0.15)}
.sm-place-sep{height:1px;background:rgba(60,110,180,0.15);margin:4px 12px}

/* Footer: search + shutdown */
.sm-footer{
    display:flex;align-items:center;justify-content:space-between;gap:8px;
    padding:6px 10px;
    background:linear-gradient(180deg,#e4ecf7,#d0dcea);
    border-top:1px solid #b8c8dc;
}
.sm-search{flex:1;position:relative;display:flex;align-items:center}
.sm-search-input{
    width:100%;padding:5px 30px 5px 8px;
    border:1px solid #a8b8cc;border-radius:3px;
    background:#fff;font-size:12px;color:#555;
    font-family:inherit;outline:none;
}
.sm-search-input:focus{border-color:#4a90d9}
.sm-search-input::placeholder{color:#aaa}
.sm-search-icon{position:absolute;right:6px;pointer-events:none}

.sm-shutdown{display:flex}
.shutdown-btn{
    padding:5px 14px;border:1px solid #3a7abf;
    background:linear-gradient(180deg,#5ea4e0,#3b7dd8);
    color:#fff;font-size:12px;font-weight:500;cursor:pointer;
    border-radius:3px 0 0 3px;transition:background .1s;
}
.shutdown-btn:hover{background:linear-gradient(180deg,#4a90d9,#2a5da8)}
.shutdown-arrow{
    padding:5px 6px;border:1px solid #3a7abf;border-left:1px solid rgba(255,255,255,0.3);
    background:linear-gradient(180deg,#5ea4e0,#3b7dd8);
    color:#fff;font-size:10px;cursor:pointer;
    border-radius:0 3px 3px 0;transition:background .1s;
}
.shutdown-arrow:hover{background:linear-gradient(180deg,#4a90d9,#2a5da8)}

/* Shutdown overlay */
.shutdown-overlay{position:fixed;inset:0;z-index:10000;background:#000;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#ccc;font-size:15px;animation:fadeIn .8s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ===== Mobile ===== */
@media(max-width:768px){
    .desktop-icons{gap:4px;padding:10px}
    .desktop-icon{width:68px}
    .di-icon svg{width:36px;height:36px}
    .window{min-width:unset!important;width:calc(100vw - 16px)!important;left:8px!important}
    .start-menu{width:100%;border-radius:8px 8px 0 0}
    .sm-body{flex-direction:column;min-height:auto}
    .sm-right{width:100%}
    .explorer-sidebar{display:none}
    .about-card{flex-direction:column;align-items:center;text-align:center}
}