/* Zypherius Sidebar Navigation — Krea-style, LIGHT theme */
.zyph-sidebar{position:fixed;left:0;top:0;bottom:0;width:220px;background:#fafafe;border-right:1px solid #e8e5f0;display:flex;flex-direction:column;z-index:100;transition:width .2s}
.zyph-sidebar.collapsed{width:56px}
.zyph-sidebar.collapsed .nav-label,.zyph-sidebar.collapsed .nav-section-title,.zyph-sidebar.collapsed .nav-sessions,.zyph-sidebar.collapsed .nav-logo-text,.zyph-sidebar.collapsed .nav-credits{display:none}
.zyph-sidebar.collapsed .nav-item{justify-content:center;padding:10px 0}
.zyph-sidebar.collapsed .nav-more{justify-content:center}

/* Logo */
.nav-logo{padding:14px 16px;display:flex;align-items:center;gap:10px;border-bottom:1px solid #e8e5f0}
.nav-logo-icon{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,#7c5cfc,#a78bfa);display:flex;align-items:center;justify-content:center;font-size:14px;color:#fff;font-weight:700;flex-shrink:0}
.nav-logo-text{font-size:15px;font-weight:700;color:#1a1a2e;white-space:nowrap}

/* Toggle btn */
.nav-toggle{position:absolute;top:14px;right:-12px;width:24px;height:24px;border-radius:50%;background:#fff;border:1px solid #e0ddf0;color:#8b8b9e;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:11px;z-index:2;transition:all .15s;box-shadow:0 1px 4px rgba(0,0,0,0.06)}
.nav-toggle:hover{background:#7c5cfc;color:#fff;border-color:#7c5cfc}

/* Sections */
.nav-section{padding:6px 0}
.nav-section-title{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:#a0a0b8;padding:6px 16px 4px;user-select:none}

/* Items */
.nav-item{display:flex;align-items:center;gap:10px;padding:8px 14px;margin:1px 8px;border-radius:10px;cursor:pointer;transition:all .12s;text-decoration:none;color:#5a5a72;font-size:13px;font-weight:500}
.nav-item:hover{background:rgba(124,92,252,0.06);color:#1a1a2e}
.nav-item.active{background:rgba(124,92,252,0.10);color:#1a1a2e}

/* Icon squares — Krea style */
.nav-icon{width:28px;height:28px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0;transition:all .3s cubic-bezier(0.34,1.56,0.64,1);position:relative}
.nav-icon::before{content:'';position:absolute;inset:0;border-radius:9px;background:linear-gradient(180deg,rgba(255,255,255,0.35) 0%,transparent 50%);opacity:0;transition:opacity .3s;pointer-events:none}
.nav-item:hover .nav-icon{transform:translateY(-3px) scale(1.18);box-shadow:0 4px 12px var(--ni-shadow,rgba(0,0,0,0.12)),inset 0 1px 1px rgba(255,255,255,0.3)}
.nav-item:hover .nav-icon::before{opacity:1}
.nav-item:active .nav-icon{transform:translateY(-1px) scale(1.05)}
.ni-blue{background:linear-gradient(145deg,#60a5fa,#3b82f6);color:#fff;--ni-shadow:rgba(59,130,246,0.35)}
.ni-purple{background:linear-gradient(145deg,#a78bfa,#7c5cfc);color:#fff;--ni-shadow:rgba(124,92,252,0.35)}
.ni-orange{background:linear-gradient(145deg,#fbbf24,#f59e0b);color:#fff;--ni-shadow:rgba(245,158,11,0.35)}
.ni-green{background:linear-gradient(145deg,#34d399,#10b981);color:#fff;--ni-shadow:rgba(16,185,129,0.35)}
.ni-red{background:linear-gradient(145deg,#f87171,#ef4444);color:#fff;--ni-shadow:rgba(239,68,68,0.35)}
.ni-cyan{background:linear-gradient(145deg,#22d3ee,#06b6d4);color:#fff;--ni-shadow:rgba(6,182,212,0.35)}
.ni-pink{background:linear-gradient(145deg,#f472b6,#ec4899);color:#fff;--ni-shadow:rgba(236,72,153,0.35)}
.ni-yellow{background:linear-gradient(145deg,#fbbf24,#ca8a04);color:#fff;--ni-shadow:rgba(234,179,8,0.35)}
.ni-indigo{background:linear-gradient(145deg,#818cf8,#6366f1);color:#fff;--ni-shadow:rgba(99,102,241,0.35)}
.ni-teal{background:linear-gradient(145deg,#2dd4bf,#14b8a6);color:#fff;--ni-shadow:rgba(20,184,166,0.35)}
.ni-gray{background:linear-gradient(145deg,#9ca3af,#6b7280);color:#fff;--ni-shadow:rgba(107,114,128,0.25)}
.nav-icon svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* More/Less toggle */
.nav-more{font-size:11px;color:#a0a0b8;padding:4px 16px;cursor:pointer;display:flex;align-items:center;gap:6px}
.nav-more:hover{color:#7c5cfc}

/* Sessions */
.nav-sessions{flex:1;overflow-y:auto;padding:0 8px 8px}
.nav-session{display:flex;align-items:center;gap:8px;padding:6px 8px;border-radius:8px;cursor:pointer;transition:all .12s}
.nav-session:hover{background:rgba(124,92,252,0.05)}
.nav-session-thumb{width:28px;height:28px;border-radius:6px;background:#f0eef8;overflow:hidden;flex-shrink:0}
.nav-session-thumb img{width:100%;height:100%;object-fit:cover}
.nav-session-name{font-size:12px;color:#8b8b9e;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Footer */
.nav-footer{padding:10px 14px;border-top:1px solid #e8e5f0;display:flex;align-items:center;gap:8px}
.nav-credits{font-size:12px;color:#8b8b9e}.nav-credits b{color:#7c5cfc}
.nav-avatar{width:28px;height:28px;border-radius:8px;background:rgba(124,92,252,0.10);display:flex;align-items:center;justify-content:center;font-size:12px;color:#7c5cfc;font-weight:600}

/* Main content shift */
.zyph-main{margin-left:220px;transition:margin-left .2s}
.zyph-sidebar.collapsed ~ .zyph-main{margin-left:56px}
@media(max-width:768px){.zyph-sidebar{width:56px}.zyph-sidebar .nav-label,.zyph-sidebar .nav-section-title,.zyph-sidebar .nav-sessions{display:none}.zyph-main{margin-left:56px}}