:root{--bg-primary: #ffffff;--text-primary: #111827;--accent-violet: #7c3aed;--accent-green: #10b981;--card-bg: #ffffff;--border-color: #f1f5f9}[data-theme=dark]{--bg-primary: #111827;--text-primary: #f3f4f6;--accent-violet: #a78bfa;--accent-green: #34d399;--card-bg: #1f2937;--border-color: #374151}[data-theme=landscape]{--bg-primary: #f0fdf4;--text-primary: #064e3b;--accent-violet: #8b5cf6;--accent-green: #059669;--card-bg: #ffffff;--border-color: #dcfce7}body{background-color:var(--bg-primary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease}.theme-transition{transition:all .3s ease}.bg-theme-primary{background-color:var(--bg-primary)}.text-theme-primary{color:var(--text-primary)}.bg-theme-card{background-color:var(--card-bg)}.border-theme{border-color:var(--border-color)}[data-theme=landscape] .hero-bg{background:linear-gradient(135deg,#f0fdf4,#dcfce7)}[data-theme=dark] .hero-bg{background:linear-gradient(135deg,#111827,#1f2937)}