:root{--bg-primary:#06080d;--bg-secondary:#0b111a;--bg-card:rgba(18,25,37,.92);--bg-card-solid:#111927;--bg-hover:hsla(0,0%,100%,.07);--surface-soft:hsla(0,0%,100%,.045);--text-primary:#f8fafc;--text-secondary:#c4cedd;--text-muted:#7d899d;--accent:#21c7d9;--accent-hover:#5ee4ee;--accent-gold:#f2d98b;--success:#35d48b;--warning:#f2b94b;--error:#ff6363;--border:hsla(0,0%,100%,.12);--border-strong:hsla(45,80%,75%,.34);--shadow-lg:0 28px 80px rgba(0,0,0,.45);--radius:8px}*{box-sizing:border-box;margin:0;padding:0}body,html{min-height:100%;font-family:Segoe UI,Noto Sans Thai,Tahoma,sans-serif;background:var(--bg-primary);color:var(--text-primary)}body{background:radial-gradient(circle at 12% 8%,rgba(33,199,217,.13),transparent 32%),radial-gradient(circle at 92% 0,hsla(45,80%,75%,.11),transparent 28%),linear-gradient(180deg,#080b12,#05070b)}a{color:inherit}button,input,select,textarea{font:inherit}.layout{display:grid;grid-template-columns:292px minmax(0,1fr);min-height:100vh}.sidebar{position:-webkit-sticky;position:sticky;top:0;height:100vh;background:linear-gradient(180deg,rgba(12,18,28,.97),rgba(8,12,19,.98));border-right:1px solid var(--border);padding:22px 16px;display:flex;flex-direction:column;box-shadow:16px 0 60px rgba(0,0,0,.25)}.sidebar-logo{display:flex;align-items:center;gap:12px;min-height:48px;padding:0 10px 18px;margin-bottom:12px;font-size:20px;font-weight:850;letter-spacing:0;color:var(--text-primary);border-bottom:1px solid var(--border)}.master-brand-mark,.sidebar-logo-mark{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;color:#061016;font-size:14px;font-weight:900;background:linear-gradient(135deg,var(--accent-gold),var(--accent));box-shadow:0 10px 28px rgba(33,199,217,.22)}.nav-group-label{padding:14px 12px 8px;color:var(--text-muted);font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:0}.nav-item{display:flex;align-items:center;gap:12px;min-height:44px;padding:11px 12px;border-radius:8px;color:var(--text-secondary);text-decoration:none;transition:background .18s ease,color .18s ease,transform .18s ease;margin-bottom:4px;font-size:14px;font-weight:700}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{color:#061016;background:linear-gradient(135deg,var(--accent-gold),#6be2e9);box-shadow:0 12px 34px rgba(33,199,217,.19)}.nav-icon{width:25px;height:25px;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;background:hsla(0,0%,100%,.07);font-size:12px;font-weight:900}.nav-item.active .nav-icon{background:rgba(6,16,22,.14)}.master-sidebar-footer{border-top:1px solid var(--border);padding-top:16px;margin-top:18px}.master-user-card{padding:12px;margin-bottom:12px;border:1px solid var(--border);border-radius:8px;background:hsla(0,0%,100%,.04)}.main-shell{min-width:0;display:flex;flex-direction:column}.master-topbar{position:-webkit-sticky;position:sticky;top:0;z-index:20;min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 32px;border-bottom:1px solid var(--border);background:rgba(6,8,13,.82);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.master-topbar-title{font-size:15px;font-weight:850}.master-topbar-subtitle{margin-top:3px;color:var(--text-muted);font-size:12px}.main-content{width:100%;max-width:1520px;margin:0 auto;padding:32px}.card{background:linear-gradient(180deg,rgba(19,27,41,.94),rgba(12,18,28,.94));border-radius:var(--radius);padding:24px;border:1px solid var(--border);box-shadow:0 18px 54px rgba(0,0,0,.22)}.card-title{font-size:18px;font-weight:850;margin-bottom:16px}.page-header{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:26px}.page-title{font-size:34px;line-height:1.1;font-weight:900;letter-spacing:0}.master-eyebrow{color:var(--accent-gold);font-size:12px;font-weight:900;text-transform:uppercase;margin-bottom:8px}.master-page-description{color:var(--text-secondary);margin-top:8px;max-width:680px}.master-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap}.master-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));grid-gap:18px;gap:18px}.master-grid>*{min-width:0}.master-section{margin-top:22px}.master-panel{background:hsla(0,0%,100%,.035);border:1px solid 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var(--border);background:var(--bg-card);box-shadow:var(--shadow-lg)}.login-hero{padding:40px;min-height:520px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(135deg,hsla(45,80%,75%,.12),transparent 36%),linear-gradient(180deg,rgba(18,27,42,.95),rgba(7,11,18,.96))}.login-card{padding:34px}.login-title{font-size:34px;font-weight:900;margin-bottom:8px}.login-subtitle{color:var(--text-secondary);margin-bottom:28px}.login-proof-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px}.login-proof{padding:14px;border:1px solid var(--border);border-radius:8px;background:hsla(0,0%,100%,.045)}.login-error{color:#ffd6d6;background:rgba(255,99,99,.12);border:1px solid rgba(255,99,99,.28);border-radius:8px;padding:12px;margin-bottom:16px;font-size:13px}.password-field{display:flex;gap:8px}.empty-state{text-align:center;padding:48px 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