*{box-sizing:border-box}
:root{--brand:#5b2dd6}
html,body{height:100%}
body{margin:0;font-family:'Tajawal',system-ui,Segoe UI,Arial;background:#faf6f2;color:#2c2c2c}
.app-bar{position:sticky;top:0;background:var(--brand);color:#fff;padding:18px 16px;border-bottom-left-radius:18px;border-bottom-right-radius:18px}
.app-bar h1{margin:0;font-size:28px;font-weight:800;display:flex;align-items:center;gap:8px}

.screen{display:none;padding:16px}
.screen.active{display:block}

.subjects{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-top:10px}
.card{border-radius:18px;padding:18px 16px;min-height:130px;color:#fff;position:relative;box-shadow:0 8px 20px rgba(0,0,0,.15);background:linear-gradient(135deg, rgba(255,255,255,.15), rgba(0,0,0,.05));overflow:hidden;cursor:pointer}
.card .emoji{font-size:36px;position:absolute;right:12px;top:12px;opacity:.95}
.card h3{margin:54px 0 0;font-size:22px}
.card .mood{position:absolute;left:12px;bottom:12px;font-size:22px}

.fab{position:fixed;right:16px;bottom:16px;border:none;border-radius:18px;padding:14px 18px;font-size:18px;color:#fff;box-shadow:0 10px 20px rgba(0,0,0,.25);cursor:pointer}
.fab-main{background:var(--brand)}

.subject-header{display:flex;align-items:center;gap:12px;margin:6px 4px 8px}
.back{border:none;border-radius:10px;padding:8px 10px;background:#ffd1d1;cursor:pointer}
.subject-title{display:flex;align-items:center;gap:10px}
.subject-emoji{font-size:28px}
.mood{font-size:22px}

.tabs{display:flex;gap:8px;margin:6px 0 10px;padding:4px}
.tab{flex:1;border:none;border-radius:14px;padding:10px;background:#f0d2c0;cursor:pointer}
.tab.active{background:#ffe3f8;border:2px solid #d29fe6}
.tab-body{display:none;min-height:55vh;position:relative}
.tab-body.active{display:block}

.list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.note{background:#fff;border-radius:14px;padding:12px;box-shadow:0 4px 12px rgba(0,0,0,.1);position:relative}

.files-grid,.images-grid,.audio-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.file-card,.img-card,.audio-card{background:#fff;border-radius:14px;padding:10px;box-shadow:0 4px 12px rgba(0,0,0,.1);position:relative}
.file-title{font-weight:700;margin-top:6px;font-size:14px}
.file-ext{opacity:.7;font-size:12px}

.img-card img{width:100%;height:120px;object-fit:cover;border-radius:10px}

.audio-card audio{width:100%}

.empty{opacity:.6;text-align:center;margin:40px 0}

.dialog{border:none;border-radius:16px;padding:16px;max-width:480px;width:92%}
.dialog form{display:flex;flex-direction:column;gap:10px}
.dialog input,.dialog textarea{padding:10px;border-radius:10px;border:1px solid #ddd}
.dialog menu{display:flex;gap:10px;justify-content:flex-end}

.emoji-row, .color-row{display:flex;flex-wrap:wrap;gap:8px}
.emoji-row button{font-size:24px;padding:8px 10px;border-radius:10px;border:1px solid #ddd;background:#fff;cursor:pointer}
.color-row button{width:34px;height:34px;border:none;border-radius:50%;cursor:pointer;outline:2px solid rgba(255,255,255,.7)}

.trash-bar{position:fixed;top:0;left:0;right:0;height:54px;background:linear-gradient(90deg,#ff5e5e,#00bcd4);display:none;align-items:center;justify-content:center;gap:12px;color:#fff;z-index:5}
.trash-bar.show{display:flex}
.trash{border:none;background:#00000022;padding:8px 12px;border-radius:10px;color:#fff;cursor:pointer}
.cancel{border:none;background:#ffffff44;padding:8px 12px;border-radius:10px;color:#fff;cursor:pointer}

.fab-notes{background:#7E57C2}
.fab-files{background:#0288D1}
.fab-images{background:#43A047}
.fab-audio{background:#F4511E}

.selecting .selectable{outline:3px dashed #ff8a80}
.selectable.selected{outline:3px solid #ff1744;background:#fff0f0}

.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.85);z-index:10}
.modal.show{display:flex}
.modal img{max-width:92vw;max-height:88vh;border-radius:12px;box-shadow:0 12px 32px rgba(0,0,0,.6)}