:root{--color-primary:#1e293b;--color-secondary:#0f172a;--color-success:#10b981;--color-warning:#f59e0b;--color-error:#ef4444;--color-bg-light:#f8fafc;--color-bg-white:#fff;--color-text-main:#334155;--color-text-muted:#64748b;--color-text-inverted:#f8fafc;--color-border:#e2e8f0;--color-chat-system:#f1f5f9;--color-chat-other:#fff;--color-chat-me:#e0e7ff;--font-family:"Inter",sans-serif;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05);--radius-md:12px;--radius-lg:20px;--radius-full:9999px}html{height:100%}body{min-height:100%}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--color-bg-light);color:var(--color-text-main);font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.btn-primary{background-color:var(--color-primary);border:none;border-radius:var(--radius-md);box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f;color:var(--color-text-inverted);cursor:pointer;font-size:16px;font-weight:600;padding:14px 24px;transition:all .2s cubic-bezier(.4,0,.2,1);width:100%}.btn-primary:hover{box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d;opacity:.95;transform:translateY(-1px)}.btn-primary:active{transform:translateY(0) scale(.98)}.btn-primary:disabled{box-shadow:none;cursor:not-allowed;opacity:.5;transform:none}.btn-secondary{background-color:var(--color-bg-white);border:1.5px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-main);cursor:pointer;font-size:15px;font-weight:600;padding:14px 24px;transition:all .2s ease;width:100%}.btn-secondary:hover{background-color:var(--color-bg-light);border-color:var(--color-text-muted)}.btn-link{background:none;border:none;color:var(--color-text-muted);cursor:pointer;font-size:14px;font-weight:600;padding:8px;text-decoration:none;transition:all .2s}.btn-link:hover{color:var(--color-error)}.input-field{background-color:var(--color-bg-white);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-main);font-family:var(--font-family);font-size:16px;outline:none;padding:14px 16px;transition:border-color .2s ease,box-shadow .2s ease;width:100%}.input-field:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #1e293b1a}.input-field::-moz-placeholder{color:var(--color-text-muted)}.input-field::placeholder{color:var(--color-text-muted)}.text-center{text-align:center}.mt-2{margin-top:8px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}