:root{--bg-deep: #0e081b;--bg-sidebar: #140d24;--bg-card: #1d1433;--bg-hover: #291d47;--accent-purple: #8338ec;--accent-glow: rgba(131, 56, 236, .4);--accent-orange: #ff5a36;--accent-orange-glow: rgba(255, 90, 54, .3);--text-primary: #f8f7f9;--text-secondary: #9f9baa;--border-color: #2e244d;--font-display: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--sidebar-width: 260px;--player-height: 90px}*{box-sizing:border-box;margin:0;padding:0;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background-color:var(--bg-deep);color:var(--text-primary);font-family:var(--font-body);overflow:hidden;height:100vh;height:100dvh;width:100vw}h1,h2,h3,h4,.font-display{font-family:var(--font-display);font-weight:700;letter-spacing:-.02em}.app-container{display:grid;grid-template-columns:var(--sidebar-width) minmax(0,1fr);grid-template-rows:calc(100vh - var(--player-height)) var(--player-height);grid-template-rows:calc(100dvh - var(--player-height)) var(--player-height);height:100vh;height:100dvh;width:100vw;overflow-x:hidden}.sidebar{background-color:var(--bg-sidebar);border-right:1px solid var(--border-color);padding:24px 16px;display:flex;flex-direction:column;height:100%;overflow-y:auto}.logo-container{display:flex;align-items:center;gap:12px;margin-bottom:32px;padding-left:8px}.logo-icon{font-size:28px;background:linear-gradient(135deg,var(--accent-purple),var(--accent-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.logo-text{font-family:var(--font-display);font-weight:800;font-size:24px;letter-spacing:-.03em;background:linear-gradient(to right,#fff,#d3cce3);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-links{display:flex;flex-direction:column;gap:8px;list-style:none}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 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var(--border-color);padding-top:20px;display:flex;flex-direction:column;gap:12px}.practice-flow-container{display:flex;flex-direction:column;gap:24px;height:100%;justify-content:center;padding:0 12px}.practice-flow-icon{width:48px;height:48px;margin:0 auto 16px}.practice-flow-title{font-size:32px}.practice-flow-subtitle{font-size:16px;max-width:340px}.dance-cards-grid{display:grid;grid-template-columns:1fr 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rgba(255,255,255,.08);box-shadow:0 10px 30px #0006;pointer-events:auto;animation:toast-slide-in .35s cubic-bezier(.16,1,.3,1) forwards;transition:transform .2s ease,opacity .2s ease}.toast-message-content{font-family:var(--font-body);font-size:14px;font-weight:500;color:var(--text-primary);line-height:1.4;flex:1}.toast-icon-wrapper{display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.toast-close-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:2px;display:flex;align-items:center;justify-content:center;transition:color .15s ease;flex-shrink:0;margin-top:1px}.toast-close-btn:hover{color:var(--text-primary)}.toast-success{border-left:4px solid #10b981}.toast-success .toast-icon-wrapper{color:#10b981}.toast-error{border-left:4px solid #ef4444}.toast-error .toast-icon-wrapper{color:#ef4444}.toast-info{border-left:4px solid var(--accent-purple)}.toast-info .toast-icon-wrapper{color:var(--accent-purple)}@keyframes 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