:root{--bg-color:#0f172a;--sidebar-bg:#1e293b;--card-bg:#1e293b;--text-color:#f1f5f9;--muted-text:#94a3b8;--accent-color:#38bdf8;--accent-color-hover:#0ea5e9;--border-color:hsla(0,0%,100%,.08);--success-color:#22c55e;--error-color:#ef4444}body,html{margin:0;padding:0;height:100%;overflow:auto;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg-color);color:var(--text-color)}.dashboard-layout{display:flex;width:100%;min-height:100vh;position:relative}.sidebar{position:fixed;top:0;left:0;width:240px;height:100vh;background:var(--sidebar-bg);border-right:1px solid var(--border-color);padding:30px 20px;display:flex;flex-direction:column;align-items:flex-start;box-shadow:4px 0 12px rgba(0,0,0,.25);overflow-y:auto;z-index:1000}.sidebar .logo{font-size:1.6rem;font-weight:700;color:var(--accent-color);margin-bottom:40px}.sidebar nav{display:flex;flex-direction:column;gap:14px;width:100%}.sidebar nav a{color:var(--muted-text);text-decoration:none;padding:10px 14px;border-radius:8px;font-weight:500;transition:all .2s ease}.sidebar nav a:hover{background:hsla(0,0%,100%,.08);color:var(--text-color)}.sidebar nav a.active{background:linear-gradient(135deg,var(--accent-color),var(--accent-color-hover));color:#fff}.dashboard-main{flex:1 1;margin-left:240px;padding:40px 60px;min-height:100vh;box-sizing:border-box;overflow-y:auto}.settings-topbar{display:flex;align-items:center;justify-content:space-between;background:var(--sidebar-bg);border-radius:12px;padding:20px 28px;box-shadow:0 2px 12px rgba(0,0,0,.25);margin-bottom:40px}.settings-topbar h1{font-size:1.8rem;font-weight:700;color:var(--accent-color);margin:0}.dashboard-card{background:var(--card-bg);border-radius:12px;padding:28px 30px;box-shadow:0 6px 18px rgba(0,0,0,.25);margin:0 auto 40px;max-width:900px;width:100%;text-align:center;transition:transform .2s ease,background .3s ease}.dashboard-card:hover{transform:translateY(-2px);background:hsla(0,0%,100%,.06)}.dashboard-card h3{font-size:1.4rem;color:var(--accent-color);margin-bottom:8px}.dashboard-card p{color:var(--muted-text);font-size:.95rem;margin-bottom:18px}.settings-section{width:100%;max-width:700px;margin:20px auto;padding:22px 26px;border:1.5px solid hsla(0,0%,100%,.12);border-radius:10px;background:hsla(0,0%,100%,.04);display:flex;flex-direction:column;align-items:flex-start;gap:14px;transition:background .3s ease,border-color .3s ease}.settings-section:hover{background:hsla(0,0%,100%,.06);border-color:var(--accent-color)}.settings-section label{font-size:1rem;color:var(--text-color);display:flex;align-items:center;gap:8px}.settings-section input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:var(--accent-color)}.settings-section textarea{width:100%;border-radius:8px;border:1px solid hsla(0,0%,100%,.15);background:hsla(0,0%,100%,.05);color:var(--text-color);padding:10px;font-size:.95rem;resize:vertical}.settings-section textarea:focus{border-color:var(--accent-color);outline:none;background:hsla(0,0%,100%,.08)}.settings-section button[disabled]{opacity:.6;cursor:not-allowed;background:linear-gradient(135deg,var(--accent-color),var(--accent-color-hover));color:#fff;border:none;border-radius:8px;padding:10px 18px;font-weight:600}.fade-in{animation:fadeIn .4s ease forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.sidebar{position:fixed;transform:translateX(-100%);transition:transform .3s ease;width:220px}.sidebar.sidebar-open{transform:translateX(0)}.dashboard-main{margin-left:0;padding:24px 20px}.settings-topbar{flex-direction:column;align-items:flex-start;gap:10px;padding:16px 20px}.dashboard-card{padding:22px}.settings-section{max-width:100%;padding:18px}}.settings-container{padding:100px 20px 60px}.settings-card{max-width:700px;box-shadow:0 8px 20px rgba(0,0,0,.4)}.settings-card:hover{box-shadow:0 10px 24px rgba(0,0,0,.5)}.setting-item{padding:12px 18px;transition:background .2s ease}.setting-item:hover{background:hsla(0,0%,100%,.07)}@media (max-width:600px){.settings-card{padding:30px 24px}.settings-list{gap:16px}.setting-item{flex-direction:column;align-items:flex-start;gap:6px}}.settings-container{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;min-height:100vh;padding:120px 20px 60px;background:var(--bg-color,#0f172a);color:var(--text-color,#e2e8f0);font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif}.settings-card{background:rgba(30,41,59,.9);border-radius:16px;padding:40px 50px;width:100%;max-width:720px;box-shadow:0 8px 24px rgba(0,0,0,.4);text-align:center;transition:transform .3s ease,box-shadow .3s ease}.settings-card:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(0,0,0,.5)}.settings-card h3{font-size:1.6rem;font-weight:700;color:var(--accent-color,#38bdf8);margin-bottom:24px}.settings-list{display:flex;flex-direction:column;gap:20px;text-align:left;margin-bottom:30px}.setting-item{display:flex;align-items:center;justify-content:space-between;background:hsla(0,0%,100%,.03);padding:14px 20px;border-radius:10px;border:1px solid hsla(0,0%,100%,.05)}.setting-label{font-weight:500;color:var(--text-color,#e2e8f0)}.setting-value{color:var(--muted-text,#94a3b8)}.save-btn{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#38bdf8,#0ea5e9);color:#fff;border:none;border-radius:8px;padding:12px 30px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.save-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(56,189,248,.4)}.save-btn:disabled{opacity:.6;cursor:not-allowed}.switch{position:relative;display:inline-block;width:44px;height:24px}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;inset:0;background-color:#475569;border-radius:24px}.slider,.slider:before{position:absolute;transition:.3s}.slider:before{content:"";height:18px;width:18px;left:3px;bottom:3px;background-color:#fff;border-radius:50%}input:checked+.slider{background-color:#0ea5e9}input:checked+.slider:before{transform:translateX(20px)}@media (max-width:600px){.settings-card{padding:30px 24px}.setting-item{flex-direction:column;align-items:flex-start;gap:8px}}