/* ==========================================================================
   Unified CSS — White background, Black & Navy theme
   ========================================================================== */
:root {
  --bg: #ffffff; --text: #111418; --muted: #5b6575; --panel: #f7f9fc; --panel-alt: #eef3fb;
  --border: #d8e0ee; --border-strong: #1f3a93;
  --accent: #001f3f; --accent-2: #003366; --accent-3: #0055ff;
  --success: #14b87a; --warning: #f6c56b; --danger: #cc2f3a;
  --ring: rgba(0, 85, 255, 0.35); --shadow: 0 10px 30px rgba(0,0,0,.08);
}
*,*::before,*::after{box-sizing:border-box} html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Noto Sans",sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--accent);text-decoration:none} a:hover{color:var(--accent-3)}
a.link{border-bottom:1px dashed rgba(0,85,255,.4)} a.link:hover{border-bottom-color:rgba(0,85,255,.8)}
a:focus,button:focus{outline:3px solid var(--ring);outline-offset:2px;border-radius:8px}
h1,h2,h3,h4,h5,h6{color:var(--accent-2);margin:0 0 .5rem} h1{font-size:2.25rem;text-align:center} h2{font-size:1.75rem;text-align:center} h3{font-size:1.25rem;text-align:center}
.container{display:flex;min-height:100vh}
.layout{display:grid;grid-template-areas:"header header" "sidebar main";grid-template-columns:260px 1fr;grid-template-rows:64px 1fr;min-height:100dvh}
main.content{grid-area:main;padding:clamp(16px,3vw,28px)} .content{flex:1;padding:40px}
header.appbar{grid-area:header;position:sticky;top:0;z-index:50;background:linear-gradient(135deg,#0e1d3b,#0a1530);color:#fff;border-bottom:1px solid var(--border-strong);display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 16px}
.app-actions,.actions{display:flex;align-items:center;gap:10px} .actions{justify-content:flex-end;margin-top:.6rem} .actions a,.actions form{display:inline-block;margin-right:8px}
aside.sidebar{grid-area:sidebar;background:#0f1626;color:#fff;border-right:1px solid var(--border-strong);padding:16px;position:relative;z-index:40}
.sidebar .logo{display:block;margin:6px 0 14px;max-width:190px;width:100%;border-radius:12px;box-shadow:var(--shadow)}
.sidebar-link{color:#ecf0f1;cursor:pointer;display:block;font-weight:700;transition:color .2s} .sidebar-link:hover{color:var(--accent-3);text-decoration:underline}
.nav{list-style:none;margin:10px 0 0;padding:0} .nav li{margin:15px 0}
.nav a,.nav button.nav-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:.65rem .75rem;background:transparent;color:#ecf0f1;border:1px solid transparent;border-radius:12px;font:inherit;cursor:pointer;text-decoration:none}
.nav a:hover,.nav button.nav-link:hover{background:#0e1d3b;border-color:rgba(255,255,255,.15);color:#FFD700}
.nav a.active{background:linear-gradient(135deg,rgba(0,85,255,.12),rgba(0,85,255,.12));border-color:rgba(0,85,255,.35)}
button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.7rem 1rem;border-radius:.9rem;border:1px solid rgba(255,255,255,.12);background:var(--panel);color:var(--text);cursor:pointer;transition:filter .12s ease,border-color .12s ease,transform .12s ease;text-decoration:none;font-weight:800;
      width:100%;
    }
button:hover,.btn:hover{background:var(--accent-2)} button:active,.btn:active{transform:translateY(1px)}

.btn-primary,.submit-btn,.create-btn.btn{border:none;cursor:pointer;border-radius:.6rem;padding:.5rem .9rem;font-weight:600;
    background:var(--panel);color:var(--text);border:1px solid rgba(255,255,255,.1);
    transition:filter .15s ease,background .15s ease,border-color .15s ease;}
.btn-primary:hover,.submit-btn:hover,.create-btn:hover{background:var(--accent-2)}

.btn-ghost{background:transparent;color:var(--accent);border:1px solid rgba(0,0,0,.15)} .btn-ghost:hover{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.25)}
.btn-muted{background:rgba(0,0,0,.04);color:var(--muted)}
.btn-danger{background:linear-gradient(135deg,#e24a54,#cc2f3a);color:#fff;border-color:transparent} .btn-read{background:var(--accent);color:#fff}
.badge{display:inline-block;background:var(--accent);color:#fff;border:1px solid rgba(0,0,0,.08);border-radius:999px;font-size:12px;font-weight:700;padding:2px 8px;margin-left:8px}
.card,.panel,.box,.files-panel,.form-card,.ann-card{background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:16px;box-shadow:var(--shadow)}
.card{display:flex;flex-direction:column;min-height:152px;overflow:clip;padding:clamp(18px,2.5vw,24px);position:relative}
.card-title{color:var(--text);font-size:1.05rem;font-weight:700;margin:0 0 6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card:hover{border-color:var(--border-strong)} .card:hover .card-title{text-decoration:underline;text-underline-offset:3px}
.card-actions{position:absolute;inset-inline:12px;bottom:10px;display:flex;justify-content:flex-end}
.card-desc{color:var(--muted);font-size:.92rem;margin:0}
.card-icon{background:linear-gradient(135deg,var(--accent),var(--accent-3));color:#08131a;height:44px;width:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:10px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.15)}
.card-link{color:inherit;display:block;padding:18px 18px 50px;text-decoration:none}
.panel{padding:18px 20px;margin-top:14px} .panel.muted{background:var(--panel-alt)}
.panel-header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);padding-bottom:.6rem;margin-bottom:.4rem}
.panel-header h2,.panel-header h3{color:var(--text);font-size:1.2rem;font-weight:800;margin:0}
.alert,.form-alert{background:rgba(0,85,255,.08);border:1px solid rgba(0,85,255,.35);color:#0e1d3b;font-weight:600;padding:.75rem 1rem;border-radius:10px;margin-bottom:1rem;text-align:center}
.ann-list{display:grid;gap:20px}
.ann-card{padding:20px;transition:border-color .12s ease,transform .12s ease} .ann-card:hover{border-color:var(--border-strong);transform:translateY(-1px)}
.ann-card-header{margin-bottom:.75rem} .ann-card-title{color:var(--text);font-size:1.3rem;font-weight:700;margin:0 0 .3rem}
.ann-content{color:var(--text);font-size:1rem;line-height:1.5;margin:.5rem 0 1rem}
.ann-meta{color:var(--muted);font-size:.9rem;margin:0} .ann-title{color:var(--text);font-size:1.9rem;font-weight:800}
.ann-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:8px}
.announcements-container,.create-ann-container,.folder-grid-container,.doc-container,.home-container{margin:0 auto;max-width:1100px;padding:clamp(16px,2vw,28px)}
.announcement{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:20px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.announcement:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:var(--border-strong)}
.announcement .meta{color:var(--muted);font-size:12px;margin-bottom:12px} .announcement h2{color:var(--accent-2);font-size:22px;margin:0 0 10px}
.announcement p{color:var(--text);margin:5px 0} .no-announcements{color:#8a93a3;font-size:18px;margin-top:50px;text-align:center}
.files-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.file-grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));margin-top:1rem}
.file-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;text-align:center;padding:20px 10px 16px;transition:border-color .15s ease,transform .15s ease;position:relative}
.file-card:hover{border-color:rgba(0,85,255,.3);transform:translateY(-2px)}
.file-icon{font-size:2.5rem;margin-bottom:.6rem;color:var(--accent-2)} .file-link{display:block;text-decoration:none}
.file-name{color:var(--text);font-size:.95rem;word-break:break-word}
.folder-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));margin-top:20px}
.folder-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;text-align:center;padding:15px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.folder-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:var(--border-strong)}
.folder-card .date{color:var(--muted);font-size:12px} .folder-card a{color:var(--accent-2)} .folder-title{color:var(--text);font-size:1.8rem;font-weight:800;margin:0}
form{display:grid;gap:.9rem;margin-top:.3rem} .field{display:grid;gap:.35rem}
.form-row{display:grid;gap:.4rem;margin-bottom:1rem} .form-row label,.form-grid label,label{color:var(--text);font-size:.95rem;font-weight:700}
.form-grid{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center} .form-grid .field{flex:1 1 260px}
input,textarea,select{background:#fff;color:var(--text);border:1px solid #cfd6e3;border-radius:8px;padding:.65rem .8rem;transition:border-color .12s ease,box-shadow .12s ease,background .12s ease;font:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--accent-3);outline:3px solid var(--ring);outline-offset:2px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.03)}
input[type="text"],input[type="password"],input[type="email"],input[type="search"],input[type="url"],input[type="number"],select,textarea{width:100%}
.error{color:#b61e29;font-size:.85rem;font-weight:600} .errorlist{color:#b61e29;font-size:.85rem;font-weight:700;list-style:none;margin:.2rem 0 0;padding:0}
.help,.muted-text{color:var(--muted);font-size:.9rem}
.table-wrapper{padding:20px} table{width:100%;border-collapse:collapse;color:var(--text);margin-top:1rem}
th,td{border:1px solid var(--border);padding:12px;text-align:left} th{background-color:var(--panel-alt);color:var(--text)} tr:nth-child(even){background-color:#fafbfd}
.hidden{display:none!important} .weight{color:var(--text);font-weight:700} .inline-group label{font-weight:normal}
.section{border-top:1px solid var(--border);margin-top:20px;padding-top:20px} .subtitle,.meta{color:var(--muted);text-align:center}
.hero{margin-bottom:1.25rem;text-align:center}
.hero-title{color:var(--accent-2);font-size:clamp(1.6rem,2.6vw,2.1rem);font-weight:800;line-height:1.2;margin:.25rem 0 .5rem}
.hero-subtitle{color:var(--muted);font-size:1.05rem;margin:0 auto;max-width:60ch}
.hero-badge{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent-3));color:#031219;border:1px solid rgba(0,0,0,.08);border-radius:.75rem;padding:.35rem .6rem;font-size:.8rem;font-weight:800;letter-spacing:.3px;box-shadow:var(--shadow);margin-bottom:.75rem}
.dropdown-toggle{cursor:pointer;position:relative}
.dropdown-menu{position:absolute;right:0;top:110%;z-index:50;display:none;min-width:200px;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}
.dropdown-content{display:none;min-width:180px;position:absolute;z-index:1;background:var(--panel);border:1px solid var(--border);border-radius:4px;box-shadow:var(--shadow)}
.dropdown-item{padding:8px 10px;color:var(--text);font-size:13px;border-bottom:1px solid var(--border)} .dropdown-item:last-child{border-bottom:none}
.liked-by-dropdown:hover .dropdown-content,.liked-by-dropdown:hover .dropdown-menu{display:block}
.logo{display:block;margin:0 auto 14px;max-width:160px;border-radius:12px;box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.2px}
.brand-logo{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-3));color:#031219;box-shadow:inset 0 0 0 1px rgba(255,255,255,.18)}
.brand-name{font-size:1rem}
.create-folder-container,.create-ann-container{max-width:820px}
.doc-header{display:flex;align-items:end;justify-content:space-between;gap:1rem;margin-bottom:1.25rem}
.doc-title{color:var(--accent-2);font-size:clamp(1.6rem,2.4vw,2rem);line-height:1.2;margin:0 0 .25rem}
.doc-subtitle{color:var(--muted);font-size:.95rem;margin:0}
.top-actions{margin-bottom:1rem} .top-actions a{background:var(--success);color:#fff;padding:8px 12px;border-radius:6px} .top-actions a:hover{filter:brightness(.95)}
.auth-wrap{display:flex;flex-direction:column;align-items:center;margin:0 auto;max-width:640px;width:100%}
.profile-card{background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;margin:40px auto;max-width:500px;padding:32px 28px 28px}
.profile-card h1{color:var(--accent-2);font-size:2rem;font-weight:600;letter-spacing:1px;margin-bottom:18px}
.profile-card fieldset{background:#fafbfc;border:1.5px solid #e1e4ea;border-radius:8px;margin-top:18px;padding:14px 14px 10px}
.profile-card label{color:var(--text);font-size:1rem;font-weight:500;margin:12px 0 3px;display:block}
.profile-card input,.profile-card select{background:#f5f6fa;border:1px solid #e1e4ea;border-radius:6px;font-size:1rem;padding:10px 12px;margin-bottom:10px;width:75%}
.profile-card input:read-only{background:#ebedf0;color:#888}
.profile-card legend{color:var(--accent-2);font-size:1rem;font-weight:600;padding:0 8px}
.profile-card .save-btn{background:#007bff;color:#fff;border:none;border-radius:8px;box-shadow:0 2px 6px rgba(44,62,80,.07);font-size:1.08rem;font-weight:600;letter-spacing:.5px;width:100%;padding:12px 0;margin-top:18px;transition:background .2s}
.profile-card .save-btn:hover{background:#0056b3}
.reset-pass-btn .save-btn{background:#e67e22;margin-top:0} .reset-pass-btn .save-btn:hover{background:#b25812}
.like-delete{display:flex;align-items:center;gap:10px;margin-top:10px}
.liked-by{background:#eef3fb;color:#3b4660;border-radius:5px;font-size:13px;margin-top:6px;padding:6px 10px}
.meta{margin-top:.9rem}
.read-btn{background:#17a2b8;border:none;border-radius:5px;color:#fff;padding:6px 14px;font-weight:700} .read-btn:hover{filter:brightness(.95)}
.read-label{color:#2f9e5a;font-size:14px;font-weight:700}
.delete-form{position:absolute;right:8px;top:6px} .delete-icon{background:transparent;border:none;color:var(--muted);cursor:pointer;font-size:1rem;transition:color .15s ease,transform .1s ease} .delete-icon:hover{color:var(--danger);transform:scale(1.2)}
.delete-btn{background:#dc3545;border:none;border-radius:4px;color:#fff;padding:6px 10px;cursor:pointer;margin-top:8px} .delete-btn:hover{filter:brightness(.95)}
.submit-btn{display:block;width:100%;font-size:16px;margin-top:25px}
.burger{display:none;height:40px;width:40px;place-items:center;background:var(--panel);color:var(--accent-2);border:1px solid var(--border-strong);border-radius:10px;cursor:pointer}
.burger span{position:relative} .burger span,.burger::before,.burger::after{content:"";display:block;width:20px;height:2px;background:currentColor;border-radius:2px}
.burger::before{transform:translateY(-6px)} .burger::after{transform:translateY(6px)}
.scrim{display:none}
@media (max-width:960px){
  .burger{display:grid}
  .layout{grid-template-areas:"header" "main";grid-template-columns:1fr;grid-template-rows:64px 1fr}
  .scrim{display:block;position:fixed;inset:64px 0 0 0;background:rgba(0,0,0,.45);opacity:0;pointer-events:none;transition:opacity .2s ease}
  body.menu-open .scrim{opacity:1;pointer-events:auto}
  body.menu-open aside.sidebar{transform:translateX(0)}
  aside.sidebar{position:fixed;inset:64px 0 0 auto;width:min(88vw,320px);box-shadow:-22px 0 40px rgba(0,0,0,.25);transform:translateX(110%);transition:transform .2s ease}
}
@media (max-width:650px){
  .profile-card{margin:16px 6px;padding:16px 7vw}
  .profile-card h1{font-size:1.35rem}
}